struct drm_fb_helper_crtc is now just a wrapper around drm_mode_set so use that directly instead and attach it as a modeset array onto drm_client_dev. drm_fb_helper will use this array to store its modesets which means it will always initialize a drm_client, but it will not register the client (callbacks) unless it's the generic fbdev emulation.

Code will later be moved to drm_client, so add code there in a new file drm_client_modeset.c with MIT license to match drm_fb_helper.c.

The modeset connector array size is hardcoded for the cloned case to avoid having to pass in a value from the driver. A value of 8 is chosen to err on the safe side. This means that the max connector argument for drm_fb_helper_init() and drm_fb_helper_fbdev_setup() isn't used anymore, a todo entry for this is added.

In pan_display_atomic() restore_fbdev_mode_force() is used instead of restore_fbdev_mode_atomic() because that one will later become internal to drm_client_modeset.

Locking order: 1. drm_fb_helper->lock 2. drm_master_internal_acquire 3. drm_client_dev->modeset_mutex

v6: Improve commit message (Sam Ravnborg)

v3: - Use full drm_client_init/release for the modesets (Daniel Vetter) - drm_client_for_each_modeset: use lockdep_assert_held (Daniel Vetter) - Hook up to Documentation/gpu/drm-client.rst (Daniel Vetter)

v2: - Add modesets array to drm_client (Daniel Vetter) - Use a new file for the modeset code (Daniel Vetter) - File has to be MIT licensed (Emmanuel Vadot) - Add copyrights from drm_fb_helper.c

Signed-off-by: Noralf Trønnes noralf@tronnes.org Reviewed-by: Sam Ravnborg sam@ravnborg.org --- Documentation/gpu/drm-client.rst | 3 + Documentation/gpu/todo.rst | 3 + drivers/gpu/drm/Makefile | 2 +- drivers/gpu/drm/drm_client.c | 10 +- drivers/gpu/drm/drm_client_modeset.c | 104 +++++++++ drivers/gpu/drm/drm_fb_helper.c | 301 +++++++++++---------------- include/drm/drm_client.h | 30 +++ include/drm/drm_fb_helper.h | 8 - 8 files changed, 274 insertions(+), 187 deletions(-) create mode 100644 drivers/gpu/drm/drm_client_modeset.c

diff --git a/Documentation/gpu/drm-client.rst b/Documentation/gpu/drm-client.rst index 7e672063e7eb..58b5a1d1219d 100644 --- a/Documentation/gpu/drm-client.rst +++ b/Documentation/gpu/drm-client.rst @@ -10,3 +10,6 @@ Kernel clients

.. kernel-doc:: drivers/gpu/drm/drm_client.c :export: + +.. kernel-doc:: drivers/gpu/drm/drm_client_modeset.c + :export: diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index 66f05f4e469f..9d4038c50013 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -289,6 +289,9 @@ drm_fb_helper tasks these igt tests need to be fixed: kms_fbcon_fbt@psr and kms_fbcon_fbt@psr-suspend.

+- The max connector argument for drm_fb_helper_init() and + drm_fb_helper_fbdev_setup() isn't used anymore and can be removed. + Core refactorings =================

diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 4a63c1fcf389..d36feb4a6233 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -17,7 +17,7 @@ drm-y := drm_auth.o drm_cache.o \ drm_plane.o drm_color_mgmt.o drm_print.o \ drm_dumb_buffers.o drm_mode_config.o drm_vblank.o \ drm_syncobj.o drm_lease.o drm_writeback.o drm_client.o \ - drm_atomic_uapi.o drm_hdcp.o + drm_client_modeset.o drm_atomic_uapi.o drm_hdcp.o

drm-$(CONFIG_DRM_LEGACY) += drm_legacy_misc.o drm_bufs.o drm_context.o drm_dma.o drm_scatter.o drm_lock.o drm-$(CONFIG_DRM_LIB_RANDOM) += lib/drm_random.o diff --git a/drivers/gpu/drm/drm_client.c b/drivers/gpu/drm/drm_client.c index e7870a54f498..410572f14257 100644 --- a/drivers/gpu/drm/drm_client.c +++ b/drivers/gpu/drm/drm_client.c @@ -27,7 +27,6 @@ * DOC: overview * * This library provides support for clients running in the kernel like fbdev and bootsplash. - * Currently it's only partially implemented, just enough to support fbdev. * * GEM drivers which provide a GEM based dumb buffer with a virtual address are supported. */ @@ -92,14 +91,20 @@ int drm_client_init(struct drm_device *dev, struct drm_client_dev *client, client->name = name; client->funcs = funcs;

- ret = drm_client_open(client); + ret = drm_client_modeset_create(client); if (ret) goto err_put_module;

+ ret = drm_client_open(client); + if (ret) + goto err_free; + drm_dev_get(dev);

return 0;

+err_free: + drm_client_modeset_free(client); err_put_module: if (funcs) module_put(funcs->owner); @@ -148,6 +153,7 @@ void drm_client_release(struct drm_client_dev *client)

DRM_DEV_DEBUG_KMS(dev->dev, "%s\n", client->name);

+ drm_client_modeset_free(client); drm_client_close(client); drm_dev_put(dev); if (client->funcs) diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c new file mode 100644 index 000000000000..66770ed3299e --- /dev/null +++ b/drivers/gpu/drm/drm_client_modeset.c @@ -0,0 +1,104 @@ +// SPDX-License-Identifier: MIT +/* + * Copyright 2018 Noralf Trønnes + * Copyright (c) 2006-2009 Red Hat Inc. + * Copyright (c) 2006-2008 Intel Corporation + * Jesse Barnes jesse.barnes@intel.com + * Copyright (c) 2007 Dave Airlie airlied@linux.ie + */ + +#include <linux/module.h> +#include <linux/mutex.h> +#include <linux/slab.h> + +#include <drm/drm_client.h> +#include <drm/drm_crtc.h> +#include <drm/drm_device.h> + +int drm_client_modeset_create(struct drm_client_dev *client) +{ + struct drm_device *dev = client->dev; + unsigned int num_crtc = dev->mode_config.num_crtc; + unsigned int max_connector_count = 1; + struct drm_mode_set *modeset; + struct drm_crtc *crtc; + unsigned int i = 0; + + /* Add terminating zero entry to enable index less iteration */ + client->modesets = kcalloc(num_crtc + 1, sizeof(*client->modesets), GFP_KERNEL); + if (!client->modesets) + return -ENOMEM; + + mutex_init(&client->modeset_mutex); + + drm_for_each_crtc(crtc, dev) + client->modesets[i++].crtc = crtc; + + /* Cloning is only supported in the single crtc case. */ + if (num_crtc == 1) + max_connector_count = DRM_CLIENT_MAX_CLONED_CONNECTORS; + + for (modeset = client->modesets; modeset->crtc; modeset++) { + modeset->connectors = kcalloc(max_connector_count, + sizeof(*modeset->connectors), GFP_KERNEL); + if (!modeset->connectors) + goto err_free; + } + + return 0; + +err_free: + drm_client_modeset_free(client); + + return -ENOMEM; +} + +void drm_client_modeset_release(struct drm_client_dev *client) +{ + struct drm_mode_set *modeset; + unsigned int i; + + drm_client_for_each_modeset(modeset, client) { + drm_mode_destroy(client->dev, modeset->mode); + modeset->mode = NULL; + modeset->fb = NULL; + + for (i = 0; i < modeset->num_connectors; i++) { + drm_connector_put(modeset->connectors[i]); + modeset->connectors[i] = NULL; + } + modeset->num_connectors = 0; + } +} +/* TODO: Remove export when modeset code has been moved over */ +EXPORT_SYMBOL(drm_client_modeset_release); + +void drm_client_modeset_free(struct drm_client_dev *client) +{ + struct drm_mode_set *modeset; + + mutex_lock(&client->modeset_mutex); + + drm_client_modeset_release(client); + + drm_client_for_each_modeset(modeset, client) + kfree(modeset->connectors); + + mutex_unlock(&client->modeset_mutex); + + mutex_destroy(&client->modeset_mutex); + kfree(client->modesets); +} + +struct drm_mode_set *drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc) +{ + struct drm_mode_set *modeset; + + drm_client_for_each_modeset(modeset, client) + if (modeset->crtc == crtc) + return modeset; + + return NULL; +} +/* TODO: Remove export when modeset code has been moved over */ +EXPORT_SYMBOL(drm_client_find_modeset); diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 3f4cb66c7d65..b9b7c06cbc4f 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -322,13 +322,11 @@ int drm_fb_helper_debug_enter(struct fb_info *info) { struct drm_fb_helper *helper = info->par; const struct drm_crtc_helper_funcs *funcs; - int i; + struct drm_mode_set *mode_set;

list_for_each_entry(helper, &kernel_fb_helper_list, kernel_fb_list) { - for (i = 0; i < helper->crtc_count; i++) { - struct drm_mode_set *mode_set = - &helper->crtc_info[i].mode_set; - + mutex_lock(&helper->client.modeset_mutex); + drm_client_for_each_modeset(mode_set, &helper->client) { if (!mode_set->crtc->enabled) continue;

@@ -345,6 +343,7 @@ int drm_fb_helper_debug_enter(struct fb_info *info) mode_set->y, ENTER_ATOMIC_MODE_SET); } + mutex_unlock(&helper->client.modeset_mutex); }

return 0; @@ -358,14 +357,14 @@ EXPORT_SYMBOL(drm_fb_helper_debug_enter); int drm_fb_helper_debug_leave(struct fb_info *info) { struct drm_fb_helper *helper = info->par; + struct drm_client_dev *client = &helper->client; struct drm_crtc *crtc; const struct drm_crtc_helper_funcs *funcs; + struct drm_mode_set *mode_set; struct drm_framebuffer *fb; - int i; - - for (i = 0; i < helper->crtc_count; i++) { - struct drm_mode_set *mode_set = &helper->crtc_info[i].mode_set;

+ mutex_lock(&client->modeset_mutex); + drm_client_for_each_modeset(mode_set, client) { crtc = mode_set->crtc; if (drm_drv_uses_atomic_modeset(crtc->dev)) continue; @@ -388,6 +387,7 @@ int drm_fb_helper_debug_leave(struct fb_info *info) funcs->mode_set_base_atomic(mode_set->crtc, fb, crtc->x, crtc->y, LEAVE_ATOMIC_MODE_SET); } + mutex_unlock(&client->modeset_mutex);

return 0; } @@ -438,12 +438,14 @@ static bool drm_fb_helper_panel_rotation(struct drm_mode_set *modeset,

static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool active) { + struct drm_client_dev *client = &fb_helper->client; struct drm_device *dev = fb_helper->dev; struct drm_plane_state *plane_state; struct drm_plane *plane; struct drm_atomic_state *state; - int i, ret; struct drm_modeset_acquire_ctx ctx; + struct drm_mode_set *mode_set; + int ret;

drm_modeset_acquire_init(&ctx, 0);

@@ -473,8 +475,7 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ goto out_state; }

- for (i = 0; i < fb_helper->crtc_count; i++) { - struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; + drm_client_for_each_modeset(mode_set, client) { struct drm_plane *primary = mode_set->crtc->primary; unsigned int rotation;

@@ -522,9 +523,11 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ

static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper) { + struct drm_client_dev *client = &fb_helper->client; struct drm_device *dev = fb_helper->dev; + struct drm_mode_set *mode_set; struct drm_plane *plane; - int i, ret = 0; + int ret = 0;

drm_modeset_lock_all(fb_helper->dev); drm_for_each_plane(plane, dev) { @@ -537,8 +540,7 @@ static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper) DRM_MODE_ROTATE_0); }

- for (i = 0; i < fb_helper->crtc_count; i++) { - struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; + drm_client_for_each_modeset(mode_set, client) { struct drm_crtc *crtc = mode_set->crtc;

if (crtc->funcs->cursor_set2) { @@ -564,11 +566,16 @@ static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper) static int restore_fbdev_mode_force(struct drm_fb_helper *fb_helper) { struct drm_device *dev = fb_helper->dev; + int ret;

+ mutex_lock(&fb_helper->client.modeset_mutex); if (drm_drv_uses_atomic_modeset(dev)) - return restore_fbdev_mode_atomic(fb_helper, true); + ret = restore_fbdev_mode_atomic(fb_helper, true); else - return restore_fbdev_mode_legacy(fb_helper); + ret = restore_fbdev_mode_legacy(fb_helper); + mutex_unlock(&fb_helper->client.modeset_mutex); + + return ret; }

static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) @@ -687,15 +694,14 @@ static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { };

static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode) { + struct drm_client_dev *client = &fb_helper->client; struct drm_device *dev = fb_helper->dev; struct drm_connector *connector; struct drm_mode_set *modeset; - int i, j; + int j;

drm_modeset_lock_all(dev); - for (i = 0; i < fb_helper->crtc_count; i++) { - modeset = &fb_helper->crtc_info[i].mode_set; - + drm_client_for_each_modeset(modeset, client) { if (!modeset->crtc->enabled) continue;

@@ -712,6 +718,7 @@ static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode) static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) { struct drm_fb_helper *fb_helper = info->par; + struct drm_client_dev *client = &fb_helper->client; struct drm_device *dev = fb_helper->dev;

/* @@ -721,10 +728,12 @@ static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) if (!drm_master_internal_acquire(dev)) goto unlock;

+ mutex_lock(&client->modeset_mutex); if (drm_drv_uses_atomic_modeset(dev)) restore_fbdev_mode_atomic(fb_helper, dpms_mode == DRM_MODE_DPMS_ON); else dpms_legacy(fb_helper, dpms_mode); + mutex_unlock(&client->modeset_mutex);

drm_master_internal_release(dev); unlock: @@ -767,43 +776,6 @@ int drm_fb_helper_blank(int blank, struct fb_info *info) } EXPORT_SYMBOL(drm_fb_helper_blank);

-static void drm_fb_helper_modeset_release(struct drm_fb_helper *helper, - struct drm_mode_set *modeset) -{ - int i; - - for (i = 0; i < modeset->num_connectors; i++) { - drm_connector_put(modeset->connectors[i]); - modeset->connectors[i] = NULL; - } - modeset->num_connectors = 0; - - drm_mode_destroy(helper->dev, modeset->mode); - modeset->mode = NULL; - - /* FIXME should hold a ref? */ - modeset->fb = NULL; -} - -static void drm_fb_helper_crtc_free(struct drm_fb_helper *helper) -{ - int i; - - for (i = 0; i < helper->connector_count; i++) { - drm_connector_put(helper->connector_info[i]->connector); - kfree(helper->connector_info[i]); - } - kfree(helper->connector_info); - - for (i = 0; i < helper->crtc_count; i++) { - struct drm_mode_set *modeset = &helper->crtc_info[i].mode_set; - - drm_fb_helper_modeset_release(helper, modeset); - kfree(modeset->connectors); - } - kfree(helper->crtc_info); -} - static void drm_fb_helper_resume_worker(struct work_struct *work) { struct drm_fb_helper *helper = container_of(work, struct drm_fb_helper, @@ -882,7 +854,7 @@ EXPORT_SYMBOL(drm_fb_helper_prepare); * drm_fb_helper_init - initialize a &struct drm_fb_helper * @dev: drm device * @fb_helper: driver-allocated fbdev helper structure to initialize - * @max_conn_count: max connector count + * @max_conn_count: max connector count (not used) * * This allocates the structures for the fbdev helper with the given limits. * Note that this won't yet touch the hardware (through the driver interfaces) @@ -898,53 +870,36 @@ int drm_fb_helper_init(struct drm_device *dev, struct drm_fb_helper *fb_helper, int max_conn_count) { - struct drm_crtc *crtc; - struct drm_mode_config *config = &dev->mode_config; - int i; + int ret;

if (!drm_fbdev_emulation) { dev->fb_helper = fb_helper; return 0; }

- if (!max_conn_count) - return -EINVAL; - - fb_helper->crtc_info = kcalloc(config->num_crtc, sizeof(struct drm_fb_helper_crtc), GFP_KERNEL); - if (!fb_helper->crtc_info) - return -ENOMEM; - - fb_helper->crtc_count = config->num_crtc; - fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); - if (!fb_helper->connector_info) { - kfree(fb_helper->crtc_info); - return -ENOMEM; + /* + * If this is not the generic fbdev client, initialize a drm_client + * without callbacks so we can use the modesets. + */ + if (!fb_helper->client.funcs) { + ret = drm_client_init(dev, &fb_helper->client, "drm_fb_helper", NULL); + if (ret) + return ret; } + + fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); + if (!fb_helper->connector_info) + goto out_free; + fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; fb_helper->connector_count = 0;

- for (i = 0; i < fb_helper->crtc_count; i++) { - fb_helper->crtc_info[i].mode_set.connectors = - kcalloc(max_conn_count, - sizeof(struct drm_connector *), - GFP_KERNEL); - - if (!fb_helper->crtc_info[i].mode_set.connectors) - goto out_free; - fb_helper->crtc_info[i].mode_set.num_connectors = 0; - } - - i = 0; - drm_for_each_crtc(crtc, dev) { - fb_helper->crtc_info[i].mode_set.crtc = crtc; - i++; - } - dev->fb_helper = fb_helper;

return 0; out_free: - drm_fb_helper_crtc_free(fb_helper); + drm_client_release(&fb_helper->client); + return -ENOMEM; } EXPORT_SYMBOL(drm_fb_helper_init); @@ -1020,6 +975,7 @@ EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) { struct fb_info *info; + int i;

if (!fb_helper) return; @@ -1049,8 +1005,15 @@ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) mutex_unlock(&kernel_fb_helper_lock);

mutex_destroy(&fb_helper->lock); - drm_fb_helper_crtc_free(fb_helper);

+ if (!fb_helper->client.funcs) + drm_client_release(&fb_helper->client); + + for (i = 0; i < fb_helper->connector_count; i++) { + drm_connector_put(fb_helper->connector_info[i]->connector); + kfree(fb_helper->connector_info[i]); + } + kfree(fb_helper->connector_info); } EXPORT_SYMBOL(drm_fb_helper_fini);

@@ -1395,13 +1358,14 @@ static int setcmap_pseudo_palette(struct fb_cmap *cmap, struct fb_info *info) static int setcmap_legacy(struct fb_cmap *cmap, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; + struct drm_mode_set *modeset; struct drm_crtc *crtc; u16 *r, *g, *b; - int i, ret = 0; + int ret = 0;

drm_modeset_lock_all(fb_helper->dev); - for (i = 0; i < fb_helper->crtc_count; i++) { - crtc = fb_helper->crtc_info[i].mode_set.crtc; + drm_client_for_each_modeset(modeset, &fb_helper->client) { + crtc = modeset->crtc; if (!crtc->funcs->gamma_set || !crtc->gamma_size) return -EINVAL;

@@ -1477,10 +1441,11 @@ static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info) struct drm_modeset_acquire_ctx ctx; struct drm_crtc_state *crtc_state; struct drm_atomic_state *state; + struct drm_mode_set *modeset; struct drm_crtc *crtc; u16 *r, *g, *b; - int i, ret = 0; bool replaced; + int ret = 0;

drm_modeset_acquire_init(&ctx, 0);

@@ -1492,8 +1457,8 @@ static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info)

state->acquire_ctx = &ctx; retry: - for (i = 0; i < fb_helper->crtc_count; i++) { - crtc = fb_helper->crtc_info[i].mode_set.crtc; + drm_client_for_each_modeset(modeset, &fb_helper->client) { + crtc = modeset->crtc;

if (!gamma_lut) gamma_lut = setcmap_new_gamma_lut(crtc, cmap); @@ -1521,8 +1486,8 @@ static int setcmap_atomic(struct fb_cmap *cmap, struct fb_info *info) if (ret) goto out_state;

- for (i = 0; i < fb_helper->crtc_count; i++) { - crtc = fb_helper->crtc_info[i].mode_set.crtc; + drm_client_for_each_modeset(modeset, &fb_helper->client) { + crtc = modeset->crtc;

r = crtc->gamma_store; g = r + crtc->gamma_size; @@ -1572,12 +1537,14 @@ int drm_fb_helper_setcmap(struct fb_cmap *cmap, struct fb_info *info) goto unlock; }

+ mutex_lock(&fb_helper->client.modeset_mutex); if (info->fix.visual == FB_VISUAL_TRUECOLOR) ret = setcmap_pseudo_palette(cmap, info); else if (drm_drv_uses_atomic_modeset(fb_helper->dev)) ret = setcmap_atomic(cmap, info); else ret = setcmap_legacy(cmap, info); + mutex_unlock(&fb_helper->client.modeset_mutex);

drm_master_internal_release(dev); unlock: @@ -1601,7 +1568,6 @@ int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd, { struct drm_fb_helper *fb_helper = info->par; struct drm_device *dev = fb_helper->dev; - struct drm_mode_set *mode_set; struct drm_crtc *crtc; int ret = 0;

@@ -1629,8 +1595,7 @@ int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd, * make. If we're not smart enough here, one should * just consider switch the userspace to KMS. */ - mode_set = &fb_helper->crtc_info[0].mode_set; - crtc = mode_set->crtc; + crtc = fb_helper->client.modesets[0].crtc;

/* * Only wait for a vblank event if the CRTC is @@ -1827,16 +1792,14 @@ EXPORT_SYMBOL(drm_fb_helper_set_par);

static void pan_set(struct drm_fb_helper *fb_helper, int x, int y) { - int i; - - for (i = 0; i < fb_helper->crtc_count; i++) { - struct drm_mode_set *mode_set; - - mode_set = &fb_helper->crtc_info[i].mode_set; + struct drm_mode_set *mode_set;

+ mutex_lock(&fb_helper->client.modeset_mutex); + drm_client_for_each_modeset(mode_set, &fb_helper->client) { mode_set->x = x; mode_set->y = y; } + mutex_unlock(&fb_helper->client.modeset_mutex); }

static int pan_display_atomic(struct fb_var_screeninfo *var, @@ -1847,7 +1810,7 @@ static int pan_display_atomic(struct fb_var_screeninfo *var,

pan_set(fb_helper, var->xoffset, var->yoffset);

- ret = restore_fbdev_mode_atomic(fb_helper, true); + ret = restore_fbdev_mode_force(fb_helper); if (!ret) { info->var.xoffset = var->xoffset; info->var.yoffset = var->yoffset; @@ -1861,14 +1824,13 @@ static int pan_display_legacy(struct fb_var_screeninfo *var, struct fb_info *info) { struct drm_fb_helper *fb_helper = info->par; + struct drm_client_dev *client = &fb_helper->client; struct drm_mode_set *modeset; int ret = 0; - int i;

drm_modeset_lock_all(fb_helper->dev); - for (i = 0; i < fb_helper->crtc_count; i++) { - modeset = &fb_helper->crtc_info[i].mode_set; - + mutex_lock(&client->modeset_mutex); + drm_client_for_each_modeset(modeset, client) { modeset->x = var->xoffset; modeset->y = var->yoffset;

@@ -1880,6 +1842,7 @@ static int pan_display_legacy(struct fb_var_screeninfo *var, } } } + mutex_unlock(&client->modeset_mutex); drm_modeset_unlock_all(fb_helper->dev);

return ret; @@ -1926,10 +1889,12 @@ EXPORT_SYMBOL(drm_fb_helper_pan_display); static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, int preferred_bpp) { + struct drm_client_dev *client = &fb_helper->client; int ret = 0; int crtc_count = 0; int i; struct drm_fb_helper_surface_size sizes; + struct drm_mode_set *mode_set; int best_depth = 0;

memset(&sizes, 0, sizeof(struct drm_fb_helper_surface_size)); @@ -1980,13 +1945,13 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, * supports RGBA5551 (16 bpp, depth 15) but not RGB565 (16 bpp, depth * 16) we need to scale down the depth of the sizes we request. */ - for (i = 0; i < fb_helper->crtc_count; i++) { - struct drm_mode_set *mode_set = &fb_helper->crtc_info[i].mode_set; + mutex_lock(&client->modeset_mutex); + drm_client_for_each_modeset(mode_set, client) { struct drm_crtc *crtc = mode_set->crtc; struct drm_plane *plane = crtc->primary; int j;

- DRM_DEBUG("test CRTC %d primary plane\n", i); + DRM_DEBUG("test CRTC %u primary plane\n", drm_crtc_index(crtc));

for (j = 0; j < plane->format_count; j++) { const struct drm_format_info *fmt; @@ -2026,9 +1991,8 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,

/* first up get a count of crtcs now in use and new min/maxes width/heights */ crtc_count = 0; - for (i = 0; i < fb_helper->crtc_count; i++) { + drm_client_for_each_modeset(mode_set, client) { struct drm_display_mode *desired_mode; - struct drm_mode_set *mode_set; int x, y, j; /* in case of tile group, are we the last tile vert or horiz? * If no tile group you are always the last one both vertically @@ -2036,7 +2000,6 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, */ bool lastv = true, lasth = true;

- mode_set = &fb_helper->crtc_info[i].mode_set; desired_mode = mode_set->mode;

if (!desired_mode) @@ -2066,6 +2029,7 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, if (lastv) sizes.fb_height = min_t(u32, desired_mode->vdisplay + y, sizes.fb_height); } + mutex_unlock(&client->modeset_mutex);

if (crtc_count == 0 || sizes.fb_width == -1 || sizes.fb_height == -1) { DRM_INFO("Cannot find any crtc or sizes\n"); @@ -2297,7 +2261,7 @@ static bool drm_target_cloned(struct drm_fb_helper *fb_helper, struct drm_display_mode *dmt_mode, *mode;

/* only contemplate cloning in the single crtc case */ - if (fb_helper->crtc_count > 1) + if (fb_helper->dev->mode_config.num_crtc > 1) return false;

count = 0; @@ -2486,15 +2450,17 @@ static bool connector_has_possible_crtc(struct drm_connector *connector, }

static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, - struct drm_fb_helper_crtc **best_crtcs, + struct drm_crtc **best_crtcs, struct drm_display_mode **modes, int n, int width, int height) { - int c, o; + struct drm_client_dev *client = &fb_helper->client; struct drm_connector *connector; int my_score, best_score, score; - struct drm_fb_helper_crtc **crtcs, *crtc; + struct drm_crtc **crtcs, *crtc; + struct drm_mode_set *modeset; struct drm_fb_helper_connector *fb_helper_conn; + int o;

if (n == fb_helper->connector_count) return 0; @@ -2507,8 +2473,7 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, if (modes[n] == NULL) return best_score;

- crtcs = kcalloc(fb_helper->connector_count, - sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); + crtcs = kcalloc(fb_helper->connector_count, sizeof(*crtcs), GFP_KERNEL); if (!crtcs) return best_score;

@@ -2524,11 +2489,10 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, * select a crtc for this connector and then attempt to configure * remaining connectors */ - for (c = 0; c < fb_helper->crtc_count; c++) { - crtc = &fb_helper->crtc_info[c]; + drm_client_for_each_modeset(modeset, client) { + crtc = modeset->crtc;

- if (!connector_has_possible_crtc(connector, - crtc->mode_set.crtc)) + if (!connector_has_possible_crtc(connector, crtc)) continue;

for (o = 0; o < n; o++) @@ -2537,7 +2501,7 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,

if (o < n) { /* ignore cloning unless only a single crtc */ - if (fb_helper->crtc_count > 1) + if (fb_helper->dev->mode_config.num_crtc > 1) continue;

if (!drm_mode_equal(modes[o], modes[n])) @@ -2545,14 +2509,13 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, }

crtcs[n] = crtc; - memcpy(crtcs, best_crtcs, n * sizeof(struct drm_fb_helper_crtc *)); + memcpy(crtcs, best_crtcs, n * sizeof(*crtcs)); score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, width, height); if (score > best_score) { best_score = score; memcpy(best_crtcs, crtcs, - fb_helper->connector_count * - sizeof(struct drm_fb_helper_crtc *)); + fb_helper->connector_count * sizeof(*crtcs)); } }

@@ -2560,21 +2523,9 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, return best_score; }

-static struct drm_fb_helper_crtc * -drm_fb_helper_crtc(struct drm_fb_helper *fb_helper, struct drm_crtc *crtc) -{ - int i; - - for (i = 0; i < fb_helper->crtc_count; i++) - if (fb_helper->crtc_info[i].mode_set.crtc == crtc) - return &fb_helper->crtc_info[i]; - - return NULL; -} - /* Try to read the BIOS display configuration and use it for the initial config */ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper, - struct drm_fb_helper_crtc **crtcs, + struct drm_crtc **crtcs, struct drm_display_mode **modes, struct drm_fb_offset *offsets, bool *enabled, int width, int height) @@ -2610,7 +2561,7 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper, struct drm_fb_helper_connector *fb_conn; struct drm_connector *connector; struct drm_encoder *encoder; - struct drm_fb_helper_crtc *new_crtc; + struct drm_crtc *new_crtc;

fb_conn = fb_helper->connector_info[i]; connector = fb_conn->connector; @@ -2652,7 +2603,7 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper,

num_connectors_enabled++;

- new_crtc = drm_fb_helper_crtc(fb_helper, connector->state->crtc); + new_crtc = connector->state->crtc;

/* * Make sure we're not trying to drive multiple connectors @@ -2752,10 +2703,11 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper, static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, u32 width, u32 height) { + struct drm_client_dev *client = &fb_helper->client; struct drm_device *dev = fb_helper->dev; - struct drm_fb_helper_crtc **crtcs; struct drm_display_mode **modes; struct drm_fb_offset *offsets; + struct drm_crtc **crtcs; bool *enabled; int i;

@@ -2763,8 +2715,7 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, /* prevent concurrent modification of connector_count by hotplug */ lockdep_assert_held(&fb_helper->lock);

- crtcs = kcalloc(fb_helper->connector_count, - sizeof(struct drm_fb_helper_crtc *), GFP_KERNEL); + crtcs = kcalloc(fb_helper->connector_count, sizeof(*crtcs), GFP_KERNEL); modes = kcalloc(fb_helper->connector_count, sizeof(struct drm_display_mode *), GFP_KERNEL); offsets = kcalloc(fb_helper->connector_count, @@ -2776,6 +2727,8 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, goto out; }

+ mutex_lock(&client->modeset_mutex); + mutex_lock(&fb_helper->dev->mode_config.mutex); if (drm_fb_helper_probe_connector_modes(fb_helper, width, height) == 0) DRM_DEBUG_KMS("No connectors reported connected with modes\n"); @@ -2800,24 +2753,24 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, } mutex_unlock(&fb_helper->dev->mode_config.mutex);

- /* need to set the modesets up here for use later */ - /* fill out the connector<->crtc mappings into the modesets */ - for (i = 0; i < fb_helper->crtc_count; i++) - drm_fb_helper_modeset_release(fb_helper, - &fb_helper->crtc_info[i].mode_set); + drm_client_modeset_release(client);

drm_fb_helper_for_each_connector(fb_helper, i) { struct drm_display_mode *mode = modes[i]; - struct drm_fb_helper_crtc *fb_crtc = crtcs[i]; + struct drm_crtc *crtc = crtcs[i]; struct drm_fb_offset *offset = &offsets[i];

- if (mode && fb_crtc) { - struct drm_mode_set *modeset = &fb_crtc->mode_set; + if (mode && crtc) { + struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc); struct drm_connector *connector = fb_helper->connector_info[i]->connector;

DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", - mode->name, fb_crtc->mode_set.crtc->base.id, offset->x, offset->y); + mode->name, crtc->base.id, offset->x, offset->y); + + if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS || + (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) + break;

modeset->mode = drm_mode_duplicate(dev, mode); drm_connector_get(connector); @@ -2826,6 +2779,8 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, modeset->y = offset->y; } } + + mutex_unlock(&client->modeset_mutex); out: kfree(crtcs); kfree(modes); @@ -2842,13 +2797,14 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, */ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper) { + struct drm_client_dev *client = &fb_helper->client; struct fb_info *info = fb_helper->fbdev; unsigned int rotation, sw_rotations = 0; + struct drm_mode_set *modeset; int i;

- for (i = 0; i < fb_helper->crtc_count; i++) { - struct drm_mode_set *modeset = &fb_helper->crtc_info[i].mode_set; - + mutex_lock(&client->modeset_mutex); + drm_client_for_each_modeset(modeset, client) { if (!modeset->num_connectors) continue;

@@ -2860,6 +2816,7 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper) else sw_rotations |= rotation; } + mutex_unlock(&client->modeset_mutex);

mutex_lock(&fb_helper->dev->mode_config.mutex); drm_fb_helper_for_each_connector(fb_helper, i) { @@ -3075,8 +3032,7 @@ EXPORT_SYMBOL(drm_fb_helper_hotplug_event); * @funcs: fbdev helper functions * @preferred_bpp: Preferred bits per pixel for the device. * @dev->mode_config.preferred_depth is used if this is zero. - * @max_conn_count: Maximum number of connectors. - * @dev->mode_config.num_connector is used if this is zero. + * @max_conn_count: Maximum number of connectors (not used) * * This function sets up fbdev emulation and registers fbdev for access by * userspace. If all connectors are disconnected, setup is deferred to the next @@ -3104,16 +3060,9 @@ int drm_fb_helper_fbdev_setup(struct drm_device *dev, if (!preferred_bpp) preferred_bpp = 32;

- if (!max_conn_count) - max_conn_count = dev->mode_config.num_connector; - if (!max_conn_count) { - DRM_DEV_ERROR(dev->dev, "fbdev: No connectors\n"); - return -EINVAL; - } - drm_fb_helper_prepare(dev, fb_helper, funcs);

- ret = drm_fb_helper_init(dev, fb_helper, max_conn_count); + ret = drm_fb_helper_init(dev, fb_helper, 0); if (ret < 0) { DRM_DEV_ERROR(dev->dev, "fbdev: Failed to initialize (ret=%d)\n", ret); return ret; @@ -3426,7 +3375,7 @@ static int drm_fbdev_client_hotplug(struct drm_client_dev *client)

drm_fb_helper_prepare(dev, fb_helper, &drm_fb_helper_generic_funcs);

- ret = drm_fb_helper_init(dev, fb_helper, dev->mode_config.num_connector); + ret = drm_fb_helper_init(dev, fb_helper, 0); if (ret) goto err;

diff --git a/include/drm/drm_client.h b/include/drm/drm_client.h index 268b2cf0052a..87be9aeb1fe0 100644 --- a/include/drm/drm_client.h +++ b/include/drm/drm_client.h @@ -3,8 +3,12 @@ #ifndef _DRM_CLIENT_H_ #define _DRM_CLIENT_H_

+#include <linux/lockdep.h> +#include <linux/mutex.h> #include <linux/types.h>

+#include <drm/drm_crtc.h> + struct drm_client_dev; struct drm_device; struct drm_file; @@ -13,6 +17,8 @@ struct drm_gem_object; struct drm_minor; struct module;

+#define DRM_CLIENT_MAX_CLONED_CONNECTORS 8 + /** * struct drm_client_funcs - DRM client callbacks */ @@ -85,6 +91,16 @@ struct drm_client_dev { * @file: DRM file */ struct drm_file *file; + + /** + * @modeset_mutex: Protects @modesets. + */ + struct mutex modeset_mutex; + + /** + * @modesets: CRTC configurations + */ + struct drm_mode_set *modesets; };

int drm_client_init(struct drm_device *dev, struct drm_client_dev *client, @@ -135,6 +151,20 @@ struct drm_client_buffer * drm_client_framebuffer_create(struct drm_client_dev *client, u32 width, u32 height, u32 format); void drm_client_framebuffer_delete(struct drm_client_buffer *buffer);

+int drm_client_modeset_create(struct drm_client_dev *client); +void drm_client_modeset_free(struct drm_client_dev *client); +void drm_client_modeset_release(struct drm_client_dev *client); +struct drm_mode_set *drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc); + +/** + * drm_client_for_each_modeset() - Iterate over client modesets + * @modeset: &drm_mode_set loop cursor + * @client: DRM client + */ +#define drm_client_for_each_modeset(modeset, client) \ + for (({ lockdep_assert_held(&(client)->modeset_mutex); }), \ + modeset = (client)->modesets; modeset->crtc; modeset++) + int drm_client_debugfs_init(struct drm_minor *minor);

#endif diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index 2af1c6d3e147..6b334f4d8a22 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -47,10 +47,6 @@ struct drm_fb_offset { int x, y; };

-struct drm_fb_helper_crtc { - struct drm_mode_set mode_set; -}; - /** * struct drm_fb_helper_surface_size - describes fbdev size and scanout surface size * @fb_width: fbdev width @@ -109,8 +105,6 @@ struct drm_fb_helper_connector { * struct drm_fb_helper - main structure to emulate fbdev on top of KMS * @fb: Scanout framebuffer object * @dev: DRM device - * @crtc_count: number of possible CRTCs - * @crtc_info: per-CRTC helper state (mode, x/y offset, etc) * @connector_count: number of connected connectors * @connector_info_alloc_count: size of connector_info * @funcs: driver callbacks for fb helper @@ -144,8 +138,6 @@ struct drm_fb_helper {

struct drm_framebuffer *fb; struct drm_device *dev; - int crtc_count; - struct drm_fb_helper_crtc *crtc_info; int connector_count; int connector_info_alloc_count; /**

This makes the necessary changes so the commit code can be moved out to drm_client as-is in the next patch. It's split up to ease review.

Signed-off-by: Noralf Trønnes noralf@tronnes.org Reviewed-by: Sam Ravnborg sam@ravnborg.org --- drivers/gpu/drm/drm_fb_helper.c | 122 +++++++++++++++++++++----------- 1 file changed, 81 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index b9b7c06cbc4f..64800d43837d 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -393,9 +393,20 @@ int drm_fb_helper_debug_leave(struct fb_info *info) } EXPORT_SYMBOL(drm_fb_helper_debug_leave);

-/* Check if the plane can hw rotate to match panel orientation */ -static bool drm_fb_helper_panel_rotation(struct drm_mode_set *modeset, - unsigned int *rotation) +/** + * drm_client_panel_rotation() - Check panel orientation + * @modeset: DRM modeset + * @rotation: Returned rotation value + * + * This function checks if the primary plane in @modeset can hw rotate to match + * the panel orientation on its connector. + * + * Note: Currently only 0 and 180 degrees are supported. + * + * Return: + * True if the plane can do the rotation, false otherwise. + */ +bool drm_client_panel_rotation(struct drm_mode_set *modeset, unsigned int *rotation) { struct drm_connector *connector = modeset->connectors[0]; struct drm_plane *plane = modeset->crtc->primary; @@ -436,10 +447,9 @@ static bool drm_fb_helper_panel_rotation(struct drm_mode_set *modeset, return true; }

-static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool active) +static int drm_client_modeset_commit_atomic(struct drm_client_dev *client, bool active) { - struct drm_client_dev *client = &fb_helper->client; - struct drm_device *dev = fb_helper->dev; + struct drm_device *dev = client->dev; struct drm_plane_state *plane_state; struct drm_plane *plane; struct drm_atomic_state *state; @@ -479,7 +489,7 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ struct drm_plane *primary = mode_set->crtc->primary; unsigned int rotation;

- if (drm_fb_helper_panel_rotation(mode_set, &rotation)) { + if (drm_client_panel_rotation(mode_set, &rotation)) { /* Cannot fail as we've already gotten the plane state above */ plane_state = drm_atomic_get_new_plane_state(state, primary); plane_state->rotation = rotation; @@ -521,15 +531,14 @@ static int restore_fbdev_mode_atomic(struct drm_fb_helper *fb_helper, bool activ goto retry; }

-static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper) +static int drm_client_modeset_commit_legacy(struct drm_client_dev *client) { - struct drm_client_dev *client = &fb_helper->client; - struct drm_device *dev = fb_helper->dev; + struct drm_device *dev = client->dev; struct drm_mode_set *mode_set; struct drm_plane *plane; int ret = 0;

- drm_modeset_lock_all(fb_helper->dev); + drm_modeset_lock_all(dev); drm_for_each_plane(plane, dev) { if (plane->type != DRM_PLANE_TYPE_PRIMARY) drm_plane_force_disable(plane); @@ -558,35 +567,53 @@ static int restore_fbdev_mode_legacy(struct drm_fb_helper *fb_helper) goto out; } out: - drm_modeset_unlock_all(fb_helper->dev); + drm_modeset_unlock_all(dev);

return ret; }

-static int restore_fbdev_mode_force(struct drm_fb_helper *fb_helper) +/** + * drm_client_modeset_commit_force() - Force commit CRTC configuration + * @client: DRM client + * + * Commit modeset configuration to crtcs without checking if there is a DRM master. + * + * Returns: + * Zero on success or negative error code on failure. + */ +int drm_client_modeset_commit_force(struct drm_client_dev *client) { - struct drm_device *dev = fb_helper->dev; + struct drm_device *dev = client->dev; int ret;

- mutex_lock(&fb_helper->client.modeset_mutex); + mutex_lock(&client->modeset_mutex); if (drm_drv_uses_atomic_modeset(dev)) - ret = restore_fbdev_mode_atomic(fb_helper, true); + ret = drm_client_modeset_commit_atomic(client, true); else - ret = restore_fbdev_mode_legacy(fb_helper); - mutex_unlock(&fb_helper->client.modeset_mutex); + ret = drm_client_modeset_commit_legacy(client); + mutex_unlock(&client->modeset_mutex);

return ret; }

-static int restore_fbdev_mode(struct drm_fb_helper *fb_helper) +/** + * drm_client_modeset_commit() - Commit CRTC configuration + * @client: DRM client + * + * Commit modeset configuration to crtcs. + * + * Returns: + * Zero on success or negative error code on failure. + */ +int drm_client_modeset_commit(struct drm_client_dev *client) { - struct drm_device *dev = fb_helper->dev; + struct drm_device *dev = client->dev; int ret;

if (!drm_master_internal_acquire(dev)) return -EBUSY;

- ret = restore_fbdev_mode_force(fb_helper); + ret = drm_client_modeset_commit_force(client);

drm_master_internal_release(dev);

@@ -626,7 +653,7 @@ int drm_fb_helper_restore_fbdev_mode_unlocked(struct drm_fb_helper *fb_helper) * So first these tests need to be fixed so they drop master or don't * have an fd open. */ - ret = restore_fbdev_mode_force(fb_helper); + ret = drm_client_modeset_commit_force(&fb_helper->client);

do_delayed = fb_helper->delayed_hotplug; if (do_delayed) @@ -660,7 +687,7 @@ static bool drm_fb_helper_force_kernel_mode(void) continue;

mutex_lock(&helper->lock); - ret = restore_fbdev_mode_force(helper); + ret = drm_client_modeset_commit_force(&helper->client); if (ret) error = true; mutex_unlock(&helper->lock); @@ -692,10 +719,9 @@ static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { static struct sysrq_key_op sysrq_drm_fb_helper_restore_op = { }; #endif

-static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode) +static void drm_client_modeset_dpms_legacy(struct drm_client_dev *client, int dpms_mode) { - struct drm_client_dev *client = &fb_helper->client; - struct drm_device *dev = fb_helper->dev; + struct drm_device *dev = client->dev; struct drm_connector *connector; struct drm_mode_set *modeset; int j; @@ -715,28 +741,42 @@ static void dpms_legacy(struct drm_fb_helper *fb_helper, int dpms_mode) drm_modeset_unlock_all(dev); }

-static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) +/** + * drm_client_modeset_dpms() - Set DPMS mode + * @client: DRM client + * @mode: DPMS mode + * + * Note: For atomic drivers @mode is reduced to on/off. + * + * Returns: + * Zero on success or negative error code on failure. + */ +int drm_client_modeset_dpms(struct drm_client_dev *client, int mode) { - struct drm_fb_helper *fb_helper = info->par; - struct drm_client_dev *client = &fb_helper->client; - struct drm_device *dev = fb_helper->dev; + struct drm_device *dev = client->dev; + int ret = 0;

- /* - * For each CRTC in this fb, turn the connectors on/off. - */ - mutex_lock(&fb_helper->lock); if (!drm_master_internal_acquire(dev)) - goto unlock; + return -EBUSY;

mutex_lock(&client->modeset_mutex); if (drm_drv_uses_atomic_modeset(dev)) - restore_fbdev_mode_atomic(fb_helper, dpms_mode == DRM_MODE_DPMS_ON); + ret = drm_client_modeset_commit_atomic(client, mode == DRM_MODE_DPMS_ON); else - dpms_legacy(fb_helper, dpms_mode); + drm_client_modeset_dpms_legacy(client, mode); mutex_unlock(&client->modeset_mutex);

drm_master_internal_release(dev); -unlock: + + return ret; +} + +static void drm_fb_helper_dpms(struct fb_info *info, int dpms_mode) +{ + struct drm_fb_helper *fb_helper = info->par; + + mutex_lock(&fb_helper->lock); + drm_client_modeset_dpms(&fb_helper->client, dpms_mode); mutex_unlock(&fb_helper->lock); }

@@ -1810,7 +1850,7 @@ static int pan_display_atomic(struct fb_var_screeninfo *var,

pan_set(fb_helper, var->xoffset, var->yoffset);

- ret = restore_fbdev_mode_force(fb_helper); + ret = drm_client_modeset_commit_force(&fb_helper->client); if (!ret) { info->var.xoffset = var->xoffset; info->var.yoffset = var->yoffset; @@ -2036,7 +2076,7 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper,

/* First time: disable all crtc's.. */ if (!fb_helper->deferred_setup) - restore_fbdev_mode(fb_helper); + drm_client_modeset_commit(client); return -EAGAIN; }

@@ -2810,7 +2850,7 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper)

modeset->fb = fb_helper->fb;

- if (drm_fb_helper_panel_rotation(modeset, &rotation)) + if (drm_client_panel_rotation(modeset, &rotation)) /* Rotating in hardware, fbcon should not rotate */ sw_rotations |= DRM_MODE_ROTATE_0; else

All drivers add all their connectors so there's no need to keep around an array of available connectors. Instead we just put the useable (not writeback) connectors in a temporary array using drm_client_for_each_connector_iter() everytime we probe the outputs. Other places where it's necessary to look at the connectors, we just iterate over them using the same iterator function.

Rename functions which signature is changed since they will be moved to drm_client in a later patch.

v6: Improve commit message (Sam Ravnborg)

Signed-off-by: Noralf Trønnes noralf@tronnes.org Reviewed-by: Sam Ravnborg sam@ravnborg.org --- Documentation/gpu/todo.rst | 4 + drivers/gpu/drm/drm_fb_helper.c | 498 ++++++++++---------------------- include/drm/drm_client.h | 15 + include/drm/drm_fb_helper.h | 80 ++--- 4 files changed, 193 insertions(+), 404 deletions(-)

diff --git a/Documentation/gpu/todo.rst b/Documentation/gpu/todo.rst index 9d4038c50013..ab96ba0600a9 100644 --- a/Documentation/gpu/todo.rst +++ b/Documentation/gpu/todo.rst @@ -292,6 +292,10 @@ drm_fb_helper tasks - The max connector argument for drm_fb_helper_init() and drm_fb_helper_fbdev_setup() isn't used anymore and can be removed.

+- The helper doesn't keep an array of connectors anymore so these can be + removed: drm_fb_helper_single_add_all_connectors(), + drm_fb_helper_add_one_connector() and drm_fb_helper_remove_one_connector(). + Core refactorings =================

diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index 7b388674a456..b936db6280ac 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -95,12 +95,6 @@ static DEFINE_MUTEX(kernel_fb_helper_lock); * Setup fbdev emulation by calling drm_fb_helper_fbdev_setup() and tear it * down by calling drm_fb_helper_fbdev_teardown(). * - * Drivers that need to handle connector hotplugging (e.g. dp mst) can't use - * the setup helper and will need to do the whole four-step setup process with - * drm_fb_helper_prepare(), drm_fb_helper_init(), - * drm_fb_helper_single_add_all_connectors(), enable hotplugging and - * drm_fb_helper_initial_config() to avoid a possible race window. - * * At runtime drivers should restore the fbdev console by using * drm_fb_helper_lastclose() as their &drm_driver.lastclose callback. * They should also notify the fb helper code from updates to the output @@ -123,8 +117,7 @@ static DEFINE_MUTEX(kernel_fb_helper_lock); * encoders and connectors. To finish up the fbdev helper initialization, the * drm_fb_helper_init() function is called. To probe for all attached displays * and set up an initial configuration using the detected hardware, drivers - * should call drm_fb_helper_single_add_all_connectors() followed by - * drm_fb_helper_initial_config(). + * should call drm_fb_helper_initial_config(). * * If &drm_framebuffer_funcs.dirty is set, the * drm_fb_helper_{cfb,sys}_{write,fillrect,copyarea,imageblit} functions will @@ -137,165 +130,6 @@ static DEFINE_MUTEX(kernel_fb_helper_lock); * deferred I/O (coupled with drm_fb_helper_fbdev_teardown()). */

-#define drm_fb_helper_for_each_connector(fbh, i__) \ - for (({ lockdep_assert_held(&(fbh)->lock); }), \ - i__ = 0; i__ < (fbh)->connector_count; i__++) - -static int __drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, - struct drm_connector *connector) -{ - struct drm_fb_helper_connector *fb_conn; - struct drm_fb_helper_connector **temp; - unsigned int count; - - if (!drm_fbdev_emulation) - return 0; - - lockdep_assert_held(&fb_helper->lock); - - count = fb_helper->connector_count + 1; - - if (count > fb_helper->connector_info_alloc_count) { - size_t size = count * sizeof(fb_conn); - - temp = krealloc(fb_helper->connector_info, size, GFP_KERNEL); - if (!temp) - return -ENOMEM; - - fb_helper->connector_info_alloc_count = count; - fb_helper->connector_info = temp; - } - - fb_conn = kzalloc(sizeof(*fb_conn), GFP_KERNEL); - if (!fb_conn) - return -ENOMEM; - - drm_connector_get(connector); - fb_conn->connector = connector; - fb_helper->connector_info[fb_helper->connector_count++] = fb_conn; - - return 0; -} - -int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, - struct drm_connector *connector) -{ - int err; - - if (!fb_helper) - return 0; - - mutex_lock(&fb_helper->lock); - err = __drm_fb_helper_add_one_connector(fb_helper, connector); - mutex_unlock(&fb_helper->lock); - - return err; -} -EXPORT_SYMBOL(drm_fb_helper_add_one_connector); - -/** - * drm_fb_helper_single_add_all_connectors() - add all connectors to fbdev - * emulation helper - * @fb_helper: fbdev initialized with drm_fb_helper_init, can be NULL - * - * This functions adds all the available connectors for use with the given - * fb_helper. This is a separate step to allow drivers to freely assign - * connectors to the fbdev, e.g. if some are reserved for special purposes or - * not adequate to be used for the fbcon. - * - * This function is protected against concurrent connector hotadds/removals - * using drm_fb_helper_add_one_connector() and - * drm_fb_helper_remove_one_connector(). - */ -int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) -{ - struct drm_device *dev; - struct drm_connector *connector; - struct drm_connector_list_iter conn_iter; - int i, ret = 0; - - if (!drm_fbdev_emulation || !fb_helper) - return 0; - - dev = fb_helper->dev; - - mutex_lock(&fb_helper->lock); - drm_connector_list_iter_begin(dev, &conn_iter); - drm_for_each_connector_iter(connector, &conn_iter) { - if (connector->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) - continue; - - ret = __drm_fb_helper_add_one_connector(fb_helper, connector); - if (ret) - goto fail; - } - goto out; - -fail: - drm_fb_helper_for_each_connector(fb_helper, i) { - struct drm_fb_helper_connector *fb_helper_connector = - fb_helper->connector_info[i]; - - drm_connector_put(fb_helper_connector->connector); - - kfree(fb_helper_connector); - fb_helper->connector_info[i] = NULL; - } - fb_helper->connector_count = 0; -out: - drm_connector_list_iter_end(&conn_iter); - mutex_unlock(&fb_helper->lock); - - return ret; -} -EXPORT_SYMBOL(drm_fb_helper_single_add_all_connectors); - -static int __drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, - struct drm_connector *connector) -{ - struct drm_fb_helper_connector *fb_helper_connector; - int i, j; - - if (!drm_fbdev_emulation) - return 0; - - lockdep_assert_held(&fb_helper->lock); - - drm_fb_helper_for_each_connector(fb_helper, i) { - if (fb_helper->connector_info[i]->connector == connector) - break; - } - - if (i == fb_helper->connector_count) - return -EINVAL; - fb_helper_connector = fb_helper->connector_info[i]; - drm_connector_put(fb_helper_connector->connector); - - for (j = i + 1; j < fb_helper->connector_count; j++) - fb_helper->connector_info[j - 1] = fb_helper->connector_info[j]; - - fb_helper->connector_count--; - kfree(fb_helper_connector); - - return 0; -} - -int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, - struct drm_connector *connector) -{ - int err; - - if (!fb_helper) - return 0; - - mutex_lock(&fb_helper->lock); - err = __drm_fb_helper_remove_one_connector(fb_helper, connector); - mutex_unlock(&fb_helper->lock); - - return err; -} -EXPORT_SYMBOL(drm_fb_helper_remove_one_connector); - static void drm_fb_helper_restore_lut_atomic(struct drm_crtc *crtc) { uint16_t *r_base, *g_base, *b_base; @@ -645,20 +479,9 @@ int drm_fb_helper_init(struct drm_device *dev, return ret; }

- fb_helper->connector_info = kcalloc(dev->mode_config.num_connector, sizeof(struct drm_fb_helper_connector *), GFP_KERNEL); - if (!fb_helper->connector_info) - goto out_free; - - fb_helper->connector_info_alloc_count = dev->mode_config.num_connector; - fb_helper->connector_count = 0; - dev->fb_helper = fb_helper;

return 0; -out_free: - drm_client_release(&fb_helper->client); - - return -ENOMEM; } EXPORT_SYMBOL(drm_fb_helper_init);

@@ -733,7 +556,6 @@ EXPORT_SYMBOL(drm_fb_helper_unregister_fbi); void drm_fb_helper_fini(struct drm_fb_helper *fb_helper) { struct fb_info *info; - int i;

if (!fb_helper) return; @@ -766,12 +588,6 @@ void drm_fb_helper_fini(struct drm_fb_helper *fb_helper)

if (!fb_helper->client.funcs) drm_client_release(&fb_helper->client); - - for (i = 0; i < fb_helper->connector_count; i++) { - drm_connector_put(fb_helper->connector_info[i]->connector); - kfree(fb_helper->connector_info[i]); - } - kfree(fb_helper->connector_info); } EXPORT_SYMBOL(drm_fb_helper_fini);

@@ -1650,8 +1466,9 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, struct drm_client_dev *client = &fb_helper->client; int ret = 0; int crtc_count = 0; - int i; + struct drm_connector_list_iter conn_iter; struct drm_fb_helper_surface_size sizes; + struct drm_connector *connector; struct drm_mode_set *mode_set; int best_depth = 0;

@@ -1668,11 +1485,11 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, if (preferred_bpp != sizes.surface_bpp) sizes.surface_depth = sizes.surface_bpp = preferred_bpp;

- drm_fb_helper_for_each_connector(fb_helper, i) { - struct drm_fb_helper_connector *fb_helper_conn = fb_helper->connector_info[i]; + drm_connector_list_iter_begin(fb_helper->dev, &conn_iter); + drm_client_for_each_connector_iter(connector, &conn_iter) { struct drm_cmdline_mode *cmdline_mode;

- cmdline_mode = &fb_helper_conn->connector->cmdline_mode; + cmdline_mode = &connector->cmdline_mode;

if (cmdline_mode->bpp_specified) { switch (cmdline_mode->bpp) { @@ -1697,6 +1514,7 @@ static int drm_fb_helper_single_fb_probe(struct drm_fb_helper *fb_helper, break; } } + drm_connector_list_iter_end(&conn_iter);

/* * If we run into a situation where, for example, the primary plane @@ -1881,26 +1699,12 @@ void drm_fb_helper_fill_info(struct fb_info *info, } EXPORT_SYMBOL(drm_fb_helper_fill_info);

-static int drm_fb_helper_probe_connector_modes(struct drm_fb_helper *fb_helper, - uint32_t maxX, - uint32_t maxY) -{ - struct drm_connector *connector; - int i, count = 0; - - drm_fb_helper_for_each_connector(fb_helper, i) { - connector = fb_helper->connector_info[i]->connector; - count += connector->funcs->fill_modes(connector, maxX, maxY); - } - - return count; -} - -struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, int width, int height) +static struct drm_display_mode * +drm_connector_has_preferred_mode(struct drm_connector *connector, int width, int height) { struct drm_display_mode *mode;

- list_for_each_entry(mode, &fb_connector->connector->modes, head) { + list_for_each_entry(mode, &connector->modes, head) { if (mode->hdisplay > width || mode->vdisplay > height) continue; @@ -1909,20 +1713,15 @@ struct drm_display_mode *drm_has_preferred_mode(struct drm_fb_helper_connector * } return NULL; } -EXPORT_SYMBOL(drm_has_preferred_mode);

-static bool drm_has_cmdline_mode(struct drm_fb_helper_connector *fb_connector) -{ - return fb_connector->connector->cmdline_mode.specified; -} - -struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn) +static struct drm_display_mode * +drm_connector_pick_cmdline_mode(struct drm_connector *connector) { struct drm_cmdline_mode *cmdline_mode; struct drm_display_mode *mode; bool prefer_non_interlace;

- cmdline_mode = &fb_helper_conn->connector->cmdline_mode; + cmdline_mode = &connector->cmdline_mode; if (cmdline_mode->specified == false) return NULL;

@@ -1934,7 +1733,7 @@ struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *f

prefer_non_interlace = !cmdline_mode->interlace; again: - list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { + list_for_each_entry(mode, &connector->modes, head) { /* check width/height */ if (mode->hdisplay != cmdline_mode->xres || mode->vdisplay != cmdline_mode->yres) @@ -1961,12 +1760,11 @@ struct drm_display_mode *drm_pick_cmdline_mode(struct drm_fb_helper_connector *f }

create_mode: - mode = drm_mode_create_from_cmdline_mode(fb_helper_conn->connector->dev, - cmdline_mode); - list_add(&mode->head, &fb_helper_conn->connector->modes); + mode = drm_mode_create_from_cmdline_mode(connector->dev, cmdline_mode); + list_add(&mode->head, &connector->modes); + return mode; } -EXPORT_SYMBOL(drm_pick_cmdline_mode);

static bool drm_connector_enabled(struct drm_connector *connector, bool strict) { @@ -1983,15 +1781,16 @@ static bool drm_connector_enabled(struct drm_connector *connector, bool strict) return enable; }

-static void drm_enable_connectors(struct drm_fb_helper *fb_helper, - bool *enabled) +static void drm_client_connectors_enabled(struct drm_connector **connectors, + unsigned int connector_count, + bool *enabled) { bool any_enabled = false; struct drm_connector *connector; int i = 0;

- drm_fb_helper_for_each_connector(fb_helper, i) { - connector = fb_helper->connector_info[i]->connector; + for (i = 0; i < connector_count; i++) { + connector = connectors[i]; enabled[i] = drm_connector_enabled(connector, true); DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, connector->display_info.non_desktop ? "non desktop" : enabled[i] ? "yes" : "no"); @@ -2002,28 +1801,27 @@ static void drm_enable_connectors(struct drm_fb_helper *fb_helper, if (any_enabled) return;

- drm_fb_helper_for_each_connector(fb_helper, i) { - connector = fb_helper->connector_info[i]->connector; - enabled[i] = drm_connector_enabled(connector, false); - } + for (i = 0; i < connector_count; i++) + enabled[i] = drm_connector_enabled(connectors[i], false); }

-static bool drm_target_cloned(struct drm_fb_helper *fb_helper, - struct drm_display_mode **modes, - struct drm_fb_offset *offsets, - bool *enabled, int width, int height) +static bool drm_client_target_cloned(struct drm_device *dev, + struct drm_connector **connectors, + unsigned int connector_count, + struct drm_display_mode **modes, + struct drm_fb_offset *offsets, + bool *enabled, int width, int height) { int count, i, j; bool can_clone = false; - struct drm_fb_helper_connector *fb_helper_conn; struct drm_display_mode *dmt_mode, *mode;

/* only contemplate cloning in the single crtc case */ - if (fb_helper->dev->mode_config.num_crtc > 1) + if (dev->mode_config.num_crtc > 1) return false;

count = 0; - drm_fb_helper_for_each_connector(fb_helper, i) { + for (i = 0; i < connector_count; i++) { if (enabled[i]) count++; } @@ -2034,11 +1832,10 @@ static bool drm_target_cloned(struct drm_fb_helper *fb_helper,

/* check the command line or if nothing common pick 1024x768 */ can_clone = true; - drm_fb_helper_for_each_connector(fb_helper, i) { + for (i = 0; i < connector_count; i++) { if (!enabled[i]) continue; - fb_helper_conn = fb_helper->connector_info[i]; - modes[i] = drm_pick_cmdline_mode(fb_helper_conn); + modes[i] = drm_connector_pick_cmdline_mode(connectors[i]); if (!modes[i]) { can_clone = false; break; @@ -2062,14 +1859,13 @@ static bool drm_target_cloned(struct drm_fb_helper *fb_helper,

/* try and find a 1024x768 mode on each connector */ can_clone = true; - dmt_mode = drm_mode_find_dmt(fb_helper->dev, 1024, 768, 60, false); + dmt_mode = drm_mode_find_dmt(dev, 1024, 768, 60, false);

- drm_fb_helper_for_each_connector(fb_helper, i) { + for (i = 0; i < connector_count; i++) { if (!enabled[i]) continue;

- fb_helper_conn = fb_helper->connector_info[i]; - list_for_each_entry(mode, &fb_helper_conn->connector->modes, head) { + list_for_each_entry(mode, &connectors[i]->modes, head) { if (drm_mode_match(mode, dmt_mode, DRM_MODE_MATCH_TIMINGS | DRM_MODE_MATCH_CLOCK | @@ -2089,30 +1885,31 @@ static bool drm_target_cloned(struct drm_fb_helper *fb_helper, return false; }

-static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, - struct drm_display_mode **modes, - struct drm_fb_offset *offsets, - int idx, - int h_idx, int v_idx) +static int drm_client_get_tile_offsets(struct drm_connector **connectors, + unsigned int connector_count, + struct drm_display_mode **modes, + struct drm_fb_offset *offsets, + int idx, + int h_idx, int v_idx) { - struct drm_fb_helper_connector *fb_helper_conn; + struct drm_connector *connector; int i; int hoffset = 0, voffset = 0;

- drm_fb_helper_for_each_connector(fb_helper, i) { - fb_helper_conn = fb_helper->connector_info[i]; - if (!fb_helper_conn->connector->has_tile) + for (i = 0; i < connector_count; i++) { + connector = connectors[i]; + if (!connector->has_tile) continue;

if (!modes[i] && (h_idx || v_idx)) { DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, - fb_helper_conn->connector->base.id); + connector->base.id); continue; } - if (fb_helper_conn->connector->tile_h_loc < h_idx) + if (connector->tile_h_loc < h_idx) hoffset += modes[i]->hdisplay;

- if (fb_helper_conn->connector->tile_v_loc < v_idx) + if (connector->tile_v_loc < v_idx) voffset += modes[i]->vdisplay; } offsets[idx].x = hoffset; @@ -2121,20 +1918,21 @@ static int drm_get_tile_offsets(struct drm_fb_helper *fb_helper, return 0; }

-static bool drm_target_preferred(struct drm_fb_helper *fb_helper, - struct drm_display_mode **modes, - struct drm_fb_offset *offsets, - bool *enabled, int width, int height) +static bool drm_client_target_preferred(struct drm_connector **connectors, + unsigned int connector_count, + struct drm_display_mode **modes, + struct drm_fb_offset *offsets, + bool *enabled, int width, int height) { - struct drm_fb_helper_connector *fb_helper_conn; - const u64 mask = BIT_ULL(fb_helper->connector_count) - 1; + const u64 mask = BIT_ULL(connector_count) - 1; + struct drm_connector *connector; u64 conn_configured = 0; int tile_pass = 0; int i;

retry: - drm_fb_helper_for_each_connector(fb_helper, i) { - fb_helper_conn = fb_helper->connector_info[i]; + for (i = 0; i < connector_count; i++) { + connector = connectors[i];

if (conn_configured & BIT_ULL(i)) continue; @@ -2145,17 +1943,17 @@ static bool drm_target_preferred(struct drm_fb_helper *fb_helper, }

/* first pass over all the untiled connectors */ - if (tile_pass == 0 && fb_helper_conn->connector->has_tile) + if (tile_pass == 0 && connector->has_tile) continue;

if (tile_pass == 1) { - if (fb_helper_conn->connector->tile_h_loc != 0 || - fb_helper_conn->connector->tile_v_loc != 0) + if (connector->tile_h_loc != 0 || + connector->tile_v_loc != 0) continue;

} else { - if (fb_helper_conn->connector->tile_h_loc != tile_pass - 1 && - fb_helper_conn->connector->tile_v_loc != tile_pass - 1) + if (connector->tile_h_loc != tile_pass - 1 && + connector->tile_v_loc != tile_pass - 1) /* if this tile_pass doesn't cover any of the tiles - keep going */ continue;

@@ -2163,22 +1961,22 @@ static bool drm_target_preferred(struct drm_fb_helper *fb_helper, * find the tile offsets for this pass - need to find * all tiles left and above */ - drm_get_tile_offsets(fb_helper, modes, offsets, - i, fb_helper_conn->connector->tile_h_loc, fb_helper_conn->connector->tile_v_loc); + drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i, + connector->tile_h_loc, connector->tile_v_loc); } DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", - fb_helper_conn->connector->base.id); + connector->base.id);

/* got for command line mode first */ - modes[i] = drm_pick_cmdline_mode(fb_helper_conn); + modes[i] = drm_connector_pick_cmdline_mode(connector); if (!modes[i]) { DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", - fb_helper_conn->connector->base.id, fb_helper_conn->connector->tile_group ? fb_helper_conn->connector->tile_group->id : 0); - modes[i] = drm_has_preferred_mode(fb_helper_conn, width, height); + connector->base.id, connector->tile_group ? connector->tile_group->id : 0); + modes[i] = drm_connector_has_preferred_mode(connector, width, height); } /* No preferred modes, pick one off the list */ - if (!modes[i] && !list_empty(&fb_helper_conn->connector->modes)) { - list_for_each_entry(modes[i], &fb_helper_conn->connector->modes, head) + if (!modes[i] && !list_empty(&connector->modes)) { + list_for_each_entry(modes[i], &connector->modes, head) break; } DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : @@ -2207,40 +2005,41 @@ static bool connector_has_possible_crtc(struct drm_connector *connector, return false; }

-static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, - struct drm_crtc **best_crtcs, - struct drm_display_mode **modes, - int n, int width, int height) +static int drm_client_pick_crtcs(struct drm_client_dev *client, + struct drm_connector **connectors, + unsigned int connector_count, + struct drm_crtc **best_crtcs, + struct drm_display_mode **modes, + int n, int width, int height) { - struct drm_client_dev *client = &fb_helper->client; + struct drm_device *dev = client->dev; struct drm_connector *connector; int my_score, best_score, score; struct drm_crtc **crtcs, *crtc; struct drm_mode_set *modeset; - struct drm_fb_helper_connector *fb_helper_conn; int o;

- if (n == fb_helper->connector_count) + if (n == connector_count) return 0;

- fb_helper_conn = fb_helper->connector_info[n]; - connector = fb_helper_conn->connector; + connector = connectors[n];

best_crtcs[n] = NULL; - best_score = drm_pick_crtcs(fb_helper, best_crtcs, modes, n+1, width, height); + best_score = drm_client_pick_crtcs(client, connectors, connector_count, + best_crtcs, modes, n + 1, width, height); if (modes[n] == NULL) return best_score;

- crtcs = kcalloc(fb_helper->connector_count, sizeof(*crtcs), GFP_KERNEL); + crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); if (!crtcs) return best_score;

my_score = 1; if (connector->status == connector_status_connected) my_score++; - if (drm_has_cmdline_mode(fb_helper_conn)) + if (connector->cmdline_mode.specified) my_score++; - if (drm_has_preferred_mode(fb_helper_conn, width, height)) + if (drm_connector_has_preferred_mode(connector, width, height)) my_score++;

/* @@ -2259,7 +2058,7 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,

if (o < n) { /* ignore cloning unless only a single crtc */ - if (fb_helper->dev->mode_config.num_crtc > 1) + if (dev->mode_config.num_crtc > 1) continue;

if (!drm_mode_equal(modes[o], modes[n])) @@ -2268,12 +2067,11 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper,

crtcs[n] = crtc; memcpy(crtcs, best_crtcs, n * sizeof(*crtcs)); - score = my_score + drm_pick_crtcs(fb_helper, crtcs, modes, n + 1, - width, height); + score = my_score + drm_client_pick_crtcs(client, connectors, connector_count, + crtcs, modes, n + 1, width, height); if (score > best_score) { best_score = score; - memcpy(best_crtcs, crtcs, - fb_helper->connector_count * sizeof(*crtcs)); + memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs)); } }

@@ -2282,15 +2080,17 @@ static int drm_pick_crtcs(struct drm_fb_helper *fb_helper, }

/* Try to read the BIOS display configuration and use it for the initial config */ -static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper, - struct drm_crtc **crtcs, - struct drm_display_mode **modes, - struct drm_fb_offset *offsets, - bool *enabled, int width, int height) +static bool drm_client_firmware_config(struct drm_client_dev *client, + struct drm_connector **connectors, + unsigned int connector_count, + struct drm_crtc **crtcs, + struct drm_display_mode **modes, + struct drm_fb_offset *offsets, + bool *enabled, int width, int height) { - struct drm_device *dev = fb_helper->dev; - unsigned int count = min(fb_helper->connector_count, BITS_PER_LONG); + unsigned int count = min_t(unsigned int, connector_count, BITS_PER_LONG); unsigned long conn_configured, conn_seq, mask; + struct drm_device *dev = client->dev; int i, j; bool *save_enabled; bool fallback = true, ret = true; @@ -2316,13 +2116,11 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper, retry: conn_seq = conn_configured; for (i = 0; i < count; i++) { - struct drm_fb_helper_connector *fb_conn; struct drm_connector *connector; struct drm_encoder *encoder; struct drm_crtc *new_crtc;

- fb_conn = fb_helper->connector_info[i]; - connector = fb_conn->connector; + connector = connectors[i];

if (conn_configured & BIT(i)) continue; @@ -2379,14 +2177,13 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper, connector->name);

/* go for command line mode first */ - modes[i] = drm_pick_cmdline_mode(fb_conn); + modes[i] = drm_connector_pick_cmdline_mode(connector);

/* try for preferred next */ if (!modes[i]) { DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", connector->name, connector->has_tile); - modes[i] = drm_has_preferred_mode(fb_conn, width, - height); + modes[i] = drm_connector_has_preferred_mode(connector, width, height); }

/* No preferred mode marked by the EDID? Are there any modes? */ @@ -2461,8 +2258,12 @@ static bool drm_fb_helper_firmware_config(struct drm_fb_helper *fb_helper, static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, u32 width, u32 height) { + struct drm_connector *connector, **connectors = NULL; struct drm_client_dev *client = &fb_helper->client; + struct drm_connector_list_iter conn_iter; struct drm_device *dev = fb_helper->dev; + unsigned int total_modes_count = 0; + unsigned int connector_count = 0; struct drm_display_mode **modes; struct drm_fb_offset *offsets; struct drm_crtc **crtcs; @@ -2470,16 +2271,28 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, int i;

DRM_DEBUG_KMS("\n"); - /* prevent concurrent modification of connector_count by hotplug */ - lockdep_assert_held(&fb_helper->lock);

- crtcs = kcalloc(fb_helper->connector_count, sizeof(*crtcs), GFP_KERNEL); - modes = kcalloc(fb_helper->connector_count, - sizeof(struct drm_display_mode *), GFP_KERNEL); - offsets = kcalloc(fb_helper->connector_count, - sizeof(struct drm_fb_offset), GFP_KERNEL); - enabled = kcalloc(fb_helper->connector_count, - sizeof(bool), GFP_KERNEL); + drm_connector_list_iter_begin(dev, &conn_iter); + drm_client_for_each_connector_iter(connector, &conn_iter) { + struct drm_connector **tmp; + + tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL); + if (!tmp) + goto free_connectors; + + connectors = tmp; + drm_connector_get(connector); + connectors[connector_count++] = connector; + } + drm_connector_list_iter_end(&conn_iter); + + if (!connector_count) + return; + + crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); + modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL); + offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL); + enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL); if (!crtcs || !modes || !enabled || !offsets) { DRM_ERROR("Memory allocation failed\n"); goto out; @@ -2488,40 +2301,42 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, mutex_lock(&client->modeset_mutex);

mutex_lock(&fb_helper->dev->mode_config.mutex); - if (drm_fb_helper_probe_connector_modes(fb_helper, width, height) == 0) + for (i = 0; i < connector_count; i++) + total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height); + if (!total_modes_count) DRM_DEBUG_KMS("No connectors reported connected with modes\n"); - drm_enable_connectors(fb_helper, enabled); + drm_client_connectors_enabled(connectors, connector_count, enabled);

- if (!drm_fb_helper_firmware_config(fb_helper, crtcs, modes, offsets, - enabled, width, height)) { - memset(modes, 0, fb_helper->connector_count*sizeof(modes[0])); - memset(crtcs, 0, fb_helper->connector_count*sizeof(crtcs[0])); - memset(offsets, 0, fb_helper->connector_count*sizeof(offsets[0])); + if (!drm_client_firmware_config(client, connectors, connector_count, crtcs, + modes, offsets, enabled, width, height)) { + memset(modes, 0, connector_count * sizeof(*modes)); + memset(crtcs, 0, connector_count * sizeof(*crtcs)); + memset(offsets, 0, connector_count * sizeof(*offsets));

- if (!drm_target_cloned(fb_helper, modes, offsets, - enabled, width, height) && - !drm_target_preferred(fb_helper, modes, offsets, - enabled, width, height)) + if (!drm_client_target_cloned(dev, connectors, connector_count, modes, + offsets, enabled, width, height) && + !drm_client_target_preferred(connectors, connector_count, modes, + offsets, enabled, width, height)) DRM_ERROR("Unable to find initial modes\n");

DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", width, height);

- drm_pick_crtcs(fb_helper, crtcs, modes, 0, width, height); + drm_client_pick_crtcs(client, connectors, connector_count, + crtcs, modes, 0, width, height); } mutex_unlock(&fb_helper->dev->mode_config.mutex);

drm_client_modeset_release(client);

- drm_fb_helper_for_each_connector(fb_helper, i) { + for (i = 0; i < connector_count; i++) { struct drm_display_mode *mode = modes[i]; struct drm_crtc *crtc = crtcs[i]; struct drm_fb_offset *offset = &offsets[i];

if (mode && crtc) { struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc); - struct drm_connector *connector = - fb_helper->connector_info[i]->connector; + struct drm_connector *connector = connectors[i];

DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", mode->name, crtc->base.id, offset->x, offset->y); @@ -2544,6 +2359,10 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, kfree(modes); kfree(offsets); kfree(enabled); +free_connectors: + for (i = 0; i < connector_count; i++) + drm_connector_put(connectors[i]); + kfree(connectors); }

/* @@ -2556,10 +2375,11 @@ static void drm_setup_crtcs(struct drm_fb_helper *fb_helper, static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper) { struct drm_client_dev *client = &fb_helper->client; + struct drm_connector_list_iter conn_iter; struct fb_info *info = fb_helper->fbdev; unsigned int rotation, sw_rotations = 0; + struct drm_connector *connector; struct drm_mode_set *modeset; - int i;

mutex_lock(&client->modeset_mutex); drm_client_for_each_modeset(modeset, client) { @@ -2576,10 +2396,8 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper) } mutex_unlock(&client->modeset_mutex);

- mutex_lock(&fb_helper->dev->mode_config.mutex); - drm_fb_helper_for_each_connector(fb_helper, i) { - struct drm_connector *connector = - fb_helper->connector_info[i]->connector; + drm_connector_list_iter_begin(fb_helper->dev, &conn_iter); + drm_client_for_each_connector_iter(connector, &conn_iter) {

/* use first connected connector for the physical dimensions */ if (connector->status == connector_status_connected) { @@ -2588,7 +2406,7 @@ static void drm_setup_crtcs_fb(struct drm_fb_helper *fb_helper) break; } } - mutex_unlock(&fb_helper->dev->mode_config.mutex); + drm_connector_list_iter_end(&conn_iter);

switch (sw_rotations) { case DRM_MODE_ROTATE_0: @@ -2826,12 +2644,6 @@ int drm_fb_helper_fbdev_setup(struct drm_device *dev, return ret; }

- ret = drm_fb_helper_single_add_all_connectors(fb_helper); - if (ret < 0) { - DRM_DEV_ERROR(dev->dev, "fbdev: Failed to add connectors (ret=%d)\n", ret); - goto err_drm_fb_helper_fini; - } - if (!drm_drv_uses_atomic_modeset(dev)) drm_helper_disable_unused_functions(dev);

@@ -3137,10 +2949,6 @@ static int drm_fbdev_client_hotplug(struct drm_client_dev *client) if (ret) goto err;

- ret = drm_fb_helper_single_add_all_connectors(fb_helper); - if (ret) - goto err_cleanup; - if (!drm_drv_uses_atomic_modeset(dev)) drm_helper_disable_unused_functions(dev);

diff --git a/include/drm/drm_client.h b/include/drm/drm_client.h index 6cf48419f77f..8d94880bbe25 100644 --- a/include/drm/drm_client.h +++ b/include/drm/drm_client.h @@ -7,6 +7,7 @@ #include <linux/mutex.h> #include <linux/types.h>

+#include <drm/drm_connector.h> #include <drm/drm_crtc.h>

struct drm_client_dev; @@ -169,6 +170,20 @@ int drm_client_modeset_dpms(struct drm_client_dev *client, int mode); for (({ lockdep_assert_held(&(client)->modeset_mutex); }), \ modeset = (client)->modesets; modeset->crtc; modeset++)

+/** + * drm_client_for_each_connector_iter - connector_list iterator macro + * @connector: &struct drm_connector pointer used as cursor + * @iter: &struct drm_connector_list_iter + * + * This iterates the connectors that are useable for internal clients (excludes + * writeback connectors). + * + * For more info see drm_for_each_connector_iter(). + */ +#define drm_client_for_each_connector_iter(connector, iter) \ + drm_for_each_connector_iter(connector, iter) \ + if (connector->connector_type != DRM_MODE_CONNECTOR_WRITEBACK) + int drm_client_debugfs_init(struct drm_minor *minor);

#endif diff --git a/include/drm/drm_fb_helper.h b/include/drm/drm_fb_helper.h index 6b334f4d8a22..e14d52ef9638 100644 --- a/include/drm/drm_fb_helper.h +++ b/include/drm/drm_fb_helper.h @@ -97,16 +97,10 @@ struct drm_fb_helper_funcs { struct drm_fb_helper_surface_size *sizes); };

-struct drm_fb_helper_connector { - struct drm_connector *connector; -}; - /** * struct drm_fb_helper - main structure to emulate fbdev on top of KMS * @fb: Scanout framebuffer object * @dev: DRM device - * @connector_count: number of connected connectors - * @connector_info_alloc_count: size of connector_info * @funcs: driver callbacks for fb helper * @fbdev: emulated fbdev device info struct * @pseudo_palette: fake palette of 16 colors @@ -138,15 +132,6 @@ struct drm_fb_helper {

struct drm_framebuffer *fb; struct drm_device *dev; - int connector_count; - int connector_info_alloc_count; - /** - * @connector_info: - * - * Array of per-connector information. Do not iterate directly, but use - * drm_fb_helper_for_each_connector. - */ - struct drm_fb_helper_connector **connector_info; const struct drm_fb_helper_funcs *funcs; struct fb_info *fbdev; u32 pseudo_palette[17]; @@ -286,18 +271,8 @@ int drm_fb_helper_ioctl(struct fb_info *info, unsigned int cmd,

int drm_fb_helper_hotplug_event(struct drm_fb_helper *fb_helper); int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, int bpp_sel); -int drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper); int drm_fb_helper_debug_enter(struct fb_info *info); int drm_fb_helper_debug_leave(struct fb_info *info); -struct drm_display_mode * -drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, - int width, int height); -struct drm_display_mode * -drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn); - -int drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, struct drm_connector *connector); -int drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, - struct drm_connector *connector);

int drm_fb_helper_fbdev_setup(struct drm_device *dev, struct drm_fb_helper *fb_helper, @@ -472,12 +447,6 @@ static inline int drm_fb_helper_initial_config(struct drm_fb_helper *fb_helper, return 0; }

-static inline int -drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) -{ - return 0; -} - static inline int drm_fb_helper_debug_enter(struct fb_info *info) { return 0; @@ -488,34 +457,6 @@ static inline int drm_fb_helper_debug_leave(struct fb_info *info) return 0; }

-static inline struct drm_display_mode * -drm_has_preferred_mode(struct drm_fb_helper_connector *fb_connector, - int width, int height) -{ - return NULL; -} - -static inline struct drm_display_mode * -drm_pick_cmdline_mode(struct drm_fb_helper_connector *fb_helper_conn, - int width, int height) -{ - return NULL; -} - -static inline int -drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, - struct drm_connector *connector) -{ - return 0; -} - -static inline int -drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, - struct drm_connector *connector) -{ - return 0; -} - static inline int drm_fb_helper_fbdev_setup(struct drm_device *dev, struct drm_fb_helper *fb_helper, @@ -557,6 +498,27 @@ drm_fbdev_generic_setup(struct drm_device *dev, unsigned int preferred_bpp)

#endif

+/* TODO: There's a todo entry to remove these three */ +static inline int +drm_fb_helper_single_add_all_connectors(struct drm_fb_helper *fb_helper) +{ + return 0; +} + +static inline int +drm_fb_helper_add_one_connector(struct drm_fb_helper *fb_helper, + struct drm_connector *connector) +{ + return 0; +} + +static inline int +drm_fb_helper_remove_one_connector(struct drm_fb_helper *fb_helper, + struct drm_connector *connector) +{ + return 0; +} + /** * drm_fb_helper_remove_conflicting_framebuffers - remove firmware-configured framebuffers * @a: memory range, users of which are to be removed

No functional changes, just moving code as-is and fixing includes.

Signed-off-by: Noralf Trønnes noralf@tronnes.org Reviewed-by: Maxime Ripard maxime.ripard@bootlin.com Reviewed-by: Sam Ravnborg sam@ravnborg.org --- drivers/gpu/drm/drm_client_modeset.c | 707 ++++++++++++++++++++++++++- drivers/gpu/drm/drm_fb_helper.c | 692 -------------------------- include/drm/drm_client.h | 5 +- 3 files changed, 702 insertions(+), 702 deletions(-)

diff --git a/drivers/gpu/drm/drm_client_modeset.c b/drivers/gpu/drm/drm_client_modeset.c index b1984f901a6d..006bf7390e7d 100644 --- a/drivers/gpu/drm/drm_client_modeset.c +++ b/drivers/gpu/drm/drm_client_modeset.c @@ -13,13 +13,22 @@

#include <drm/drm_atomic.h> #include <drm/drm_client.h> +#include <drm/drm_connector.h> #include <drm/drm_crtc.h> #include <drm/drm_device.h> #include <drm/drm_drv.h> +#include <drm/drm_encoder.h> +#include <drm/drm_print.h>

#include "drm_crtc_internal.h" #include "drm_internal.h"

+#define DRM_CLIENT_MAX_CLONED_CONNECTORS 8 + +struct drm_client_offset { + int x, y; +}; + int drm_client_modeset_create(struct drm_client_dev *client) { struct drm_device *dev = client->dev; @@ -58,7 +67,7 @@ int drm_client_modeset_create(struct drm_client_dev *client) return -ENOMEM; }

-void drm_client_modeset_release(struct drm_client_dev *client) +static void drm_client_modeset_release(struct drm_client_dev *client) { struct drm_mode_set *modeset; unsigned int i; @@ -75,8 +84,6 @@ void drm_client_modeset_release(struct drm_client_dev *client) modeset->num_connectors = 0; } } -/* TODO: Remove export when modeset code has been moved over */ -EXPORT_SYMBOL(drm_client_modeset_release);

void drm_client_modeset_free(struct drm_client_dev *client) { @@ -95,7 +102,8 @@ void drm_client_modeset_free(struct drm_client_dev *client) kfree(client->modesets); }

-struct drm_mode_set *drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc) +static struct drm_mode_set * +drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc) { struct drm_mode_set *modeset;

@@ -105,8 +113,695 @@ struct drm_mode_set *drm_client_find_modeset(struct drm_client_dev *client, stru

return NULL; } -/* TODO: Remove export when modeset code has been moved over */ -EXPORT_SYMBOL(drm_client_find_modeset); + +static struct drm_display_mode * +drm_connector_has_preferred_mode(struct drm_connector *connector, int width, int height) +{ + struct drm_display_mode *mode; + + list_for_each_entry(mode, &connector->modes, head) { + if (mode->hdisplay > width || + mode->vdisplay > height) + continue; + if (mode->type & DRM_MODE_TYPE_PREFERRED) + return mode; + } + return NULL; +} + +static struct drm_display_mode * +drm_connector_pick_cmdline_mode(struct drm_connector *connector) +{ + struct drm_cmdline_mode *cmdline_mode; + struct drm_display_mode *mode; + bool prefer_non_interlace; + + cmdline_mode = &connector->cmdline_mode; + if (cmdline_mode->specified == false) + return NULL; + + /* attempt to find a matching mode in the list of modes + * we have gotten so far, if not add a CVT mode that conforms + */ + if (cmdline_mode->rb || cmdline_mode->margins) + goto create_mode; + + prefer_non_interlace = !cmdline_mode->interlace; +again: + list_for_each_entry(mode, &connector->modes, head) { + /* check width/height */ + if (mode->hdisplay != cmdline_mode->xres || + mode->vdisplay != cmdline_mode->yres) + continue; + + if (cmdline_mode->refresh_specified) { + if (mode->vrefresh != cmdline_mode->refresh) + continue; + } + + if (cmdline_mode->interlace) { + if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) + continue; + } else if (prefer_non_interlace) { + if (mode->flags & DRM_MODE_FLAG_INTERLACE) + continue; + } + return mode; + } + + if (prefer_non_interlace) { + prefer_non_interlace = false; + goto again; + } + +create_mode: + mode = drm_mode_create_from_cmdline_mode(connector->dev, cmdline_mode); + list_add(&mode->head, &connector->modes); + + return mode; +} + +static bool drm_connector_enabled(struct drm_connector *connector, bool strict) +{ + bool enable; + + if (connector->display_info.non_desktop) + return false; + + if (strict) + enable = connector->status == connector_status_connected; + else + enable = connector->status != connector_status_disconnected; + + return enable; +} + +static void drm_client_connectors_enabled(struct drm_connector **connectors, + unsigned int connector_count, + bool *enabled) +{ + bool any_enabled = false; + struct drm_connector *connector; + int i = 0; + + for (i = 0; i < connector_count; i++) { + connector = connectors[i]; + enabled[i] = drm_connector_enabled(connector, true); + DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, + connector->display_info.non_desktop ? "non desktop" : enabled[i] ? "yes" : "no"); + + any_enabled |= enabled[i]; + } + + if (any_enabled) + return; + + for (i = 0; i < connector_count; i++) + enabled[i] = drm_connector_enabled(connectors[i], false); +} + +static bool drm_client_target_cloned(struct drm_device *dev, + struct drm_connector **connectors, + unsigned int connector_count, + struct drm_display_mode **modes, + struct drm_client_offset *offsets, + bool *enabled, int width, int height) +{ + int count, i, j; + bool can_clone = false; + struct drm_display_mode *dmt_mode, *mode; + + /* only contemplate cloning in the single crtc case */ + if (dev->mode_config.num_crtc > 1) + return false; + + count = 0; + for (i = 0; i < connector_count; i++) { + if (enabled[i]) + count++; + } + + /* only contemplate cloning if more than one connector is enabled */ + if (count <= 1) + return false; + + /* check the command line or if nothing common pick 1024x768 */ + can_clone = true; + for (i = 0; i < connector_count; i++) { + if (!enabled[i]) + continue; + modes[i] = drm_connector_pick_cmdline_mode(connectors[i]); + if (!modes[i]) { + can_clone = false; + break; + } + for (j = 0; j < i; j++) { + if (!enabled[j]) + continue; + if (!drm_mode_match(modes[j], modes[i], + DRM_MODE_MATCH_TIMINGS | + DRM_MODE_MATCH_CLOCK | + DRM_MODE_MATCH_FLAGS | + DRM_MODE_MATCH_3D_FLAGS)) + can_clone = false; + } + } + + if (can_clone) { + DRM_DEBUG_KMS("can clone using command line\n"); + return true; + } + + /* try and find a 1024x768 mode on each connector */ + can_clone = true; + dmt_mode = drm_mode_find_dmt(dev, 1024, 768, 60, false); + + for (i = 0; i < connector_count; i++) { + if (!enabled[i]) + continue; + + list_for_each_entry(mode, &connectors[i]->modes, head) { + if (drm_mode_match(mode, dmt_mode, + DRM_MODE_MATCH_TIMINGS | + DRM_MODE_MATCH_CLOCK | + DRM_MODE_MATCH_FLAGS | + DRM_MODE_MATCH_3D_FLAGS)) + modes[i] = mode; + } + if (!modes[i]) + can_clone = false; + } + + if (can_clone) { + DRM_DEBUG_KMS("can clone using 1024x768\n"); + return true; + } + DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); + return false; +} + +static int drm_client_get_tile_offsets(struct drm_connector **connectors, + unsigned int connector_count, + struct drm_display_mode **modes, + struct drm_client_offset *offsets, + int idx, + int h_idx, int v_idx) +{ + struct drm_connector *connector; + int i; + int hoffset = 0, voffset = 0; + + for (i = 0; i < connector_count; i++) { + connector = connectors[i]; + if (!connector->has_tile) + continue; + + if (!modes[i] && (h_idx || v_idx)) { + DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, + connector->base.id); + continue; + } + if (connector->tile_h_loc < h_idx) + hoffset += modes[i]->hdisplay; + + if (connector->tile_v_loc < v_idx) + voffset += modes[i]->vdisplay; + } + offsets[idx].x = hoffset; + offsets[idx].y = voffset; + DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); + return 0; +} + +static bool drm_client_target_preferred(struct drm_connector **connectors, + unsigned int connector_count, + struct drm_display_mode **modes, + struct drm_client_offset *offsets, + bool *enabled, int width, int height) +{ + const u64 mask = BIT_ULL(connector_count) - 1; + struct drm_connector *connector; + u64 conn_configured = 0; + int tile_pass = 0; + int i; + +retry: + for (i = 0; i < connector_count; i++) { + connector = connectors[i]; + + if (conn_configured & BIT_ULL(i)) + continue; + + if (enabled[i] == false) { + conn_configured |= BIT_ULL(i); + continue; + } + + /* first pass over all the untiled connectors */ + if (tile_pass == 0 && connector->has_tile) + continue; + + if (tile_pass == 1) { + if (connector->tile_h_loc != 0 || + connector->tile_v_loc != 0) + continue; + + } else { + if (connector->tile_h_loc != tile_pass - 1 && + connector->tile_v_loc != tile_pass - 1) + /* if this tile_pass doesn't cover any of the tiles - keep going */ + continue; + + /* + * find the tile offsets for this pass - need to find + * all tiles left and above + */ + drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i, + connector->tile_h_loc, connector->tile_v_loc); + } + DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", + connector->base.id); + + /* got for command line mode first */ + modes[i] = drm_connector_pick_cmdline_mode(connector); + if (!modes[i]) { + DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", + connector->base.id, connector->tile_group ? connector->tile_group->id : 0); + modes[i] = drm_connector_has_preferred_mode(connector, width, height); + } + /* No preferred modes, pick one off the list */ + if (!modes[i] && !list_empty(&connector->modes)) { + list_for_each_entry(modes[i], &connector->modes, head) + break; + } + DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : + "none"); + conn_configured |= BIT_ULL(i); + } + + if ((conn_configured & mask) != mask) { + tile_pass++; + goto retry; + } + return true; +} + +static bool connector_has_possible_crtc(struct drm_connector *connector, + struct drm_crtc *crtc) +{ + struct drm_encoder *encoder; + int i; + + drm_connector_for_each_possible_encoder(connector, encoder, i) { + if (encoder->possible_crtcs & drm_crtc_mask(crtc)) + return true; + } + + return false; +} + +static int drm_client_pick_crtcs(struct drm_client_dev *client, + struct drm_connector **connectors, + unsigned int connector_count, + struct drm_crtc **best_crtcs, + struct drm_display_mode **modes, + int n, int width, int height) +{ + struct drm_device *dev = client->dev; + struct drm_connector *connector; + int my_score, best_score, score; + struct drm_crtc **crtcs, *crtc; + struct drm_mode_set *modeset; + int o; + + if (n == connector_count) + return 0; + + connector = connectors[n]; + + best_crtcs[n] = NULL; + best_score = drm_client_pick_crtcs(client, connectors, connector_count, + best_crtcs, modes, n + 1, width, height); + if (modes[n] == NULL) + return best_score; + + crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); + if (!crtcs) + return best_score; + + my_score = 1; + if (connector->status == connector_status_connected) + my_score++; + if (connector->cmdline_mode.specified) + my_score++; + if (drm_connector_has_preferred_mode(connector, width, height)) + my_score++; + + /* + * select a crtc for this connector and then attempt to configure + * remaining connectors + */ + drm_client_for_each_modeset(modeset, client) { + crtc = modeset->crtc; + + if (!connector_has_possible_crtc(connector, crtc)) + continue; + + for (o = 0; o < n; o++) + if (best_crtcs[o] == crtc) + break; + + if (o < n) { + /* ignore cloning unless only a single crtc */ + if (dev->mode_config.num_crtc > 1) + continue; + + if (!drm_mode_equal(modes[o], modes[n])) + continue; + } + + crtcs[n] = crtc; + memcpy(crtcs, best_crtcs, n * sizeof(*crtcs)); + score = my_score + drm_client_pick_crtcs(client, connectors, connector_count, + crtcs, modes, n + 1, width, height); + if (score > best_score) { + best_score = score; + memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs)); + } + } + + kfree(crtcs); + return best_score; +} + +/* Try to read the BIOS display configuration and use it for the initial config */ +static bool drm_client_firmware_config(struct drm_client_dev *client, + struct drm_connector **connectors, + unsigned int connector_count, + struct drm_crtc **crtcs, + struct drm_display_mode **modes, + struct drm_client_offset *offsets, + bool *enabled, int width, int height) +{ + unsigned int count = min_t(unsigned int, connector_count, BITS_PER_LONG); + unsigned long conn_configured, conn_seq, mask; + struct drm_device *dev = client->dev; + int i, j; + bool *save_enabled; + bool fallback = true, ret = true; + int num_connectors_enabled = 0; + int num_connectors_detected = 0; + struct drm_modeset_acquire_ctx ctx; + + if (!drm_drv_uses_atomic_modeset(dev)) + return false; + + save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); + if (!save_enabled) + return false; + + drm_modeset_acquire_init(&ctx, 0); + + while (drm_modeset_lock_all_ctx(dev, &ctx) != 0) + drm_modeset_backoff(&ctx); + + memcpy(save_enabled, enabled, count); + mask = GENMASK(count - 1, 0); + conn_configured = 0; +retry: + conn_seq = conn_configured; + for (i = 0; i < count; i++) { + struct drm_connector *connector; + struct drm_encoder *encoder; + struct drm_crtc *new_crtc; + + connector = connectors[i]; + + if (conn_configured & BIT(i)) + continue; + + if (conn_seq == 0 && !connector->has_tile) + continue; + + if (connector->status == connector_status_connected) + num_connectors_detected++; + + if (!enabled[i]) { + DRM_DEBUG_KMS("connector %s not enabled, skipping\n", + connector->name); + conn_configured |= BIT(i); + continue; + } + + if (connector->force == DRM_FORCE_OFF) { + DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", + connector->name); + enabled[i] = false; + continue; + } + + encoder = connector->state->best_encoder; + if (!encoder || WARN_ON(!connector->state->crtc)) { + if (connector->force > DRM_FORCE_OFF) + goto bail; + + DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", + connector->name); + enabled[i] = false; + conn_configured |= BIT(i); + continue; + } + + num_connectors_enabled++; + + new_crtc = connector->state->crtc; + + /* + * Make sure we're not trying to drive multiple connectors + * with a single CRTC, since our cloning support may not + * match the BIOS. + */ + for (j = 0; j < count; j++) { + if (crtcs[j] == new_crtc) { + DRM_DEBUG_KMS("fallback: cloned configuration\n"); + goto bail; + } + } + + DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", + connector->name); + + /* go for command line mode first */ + modes[i] = drm_connector_pick_cmdline_mode(connector); + + /* try for preferred next */ + if (!modes[i]) { + DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", + connector->name, connector->has_tile); + modes[i] = drm_connector_has_preferred_mode(connector, width, height); + } + + /* No preferred mode marked by the EDID? Are there any modes? */ + if (!modes[i] && !list_empty(&connector->modes)) { + DRM_DEBUG_KMS("using first mode listed on connector %s\n", + connector->name); + modes[i] = list_first_entry(&connector->modes, + struct drm_display_mode, + head); + } + + /* last resort: use current mode */ + if (!modes[i]) { + /* + * IMPORTANT: We want to use the adjusted mode (i.e. + * after the panel fitter upscaling) as the initial + * config, not the input mode, which is what crtc->mode + * usually contains. But since our current + * code puts a mode derived from the post-pfit timings + * into crtc->mode this works out correctly. + * + * This is crtc->mode and not crtc->state->mode for the + * fastboot check to work correctly. + */ + DRM_DEBUG_KMS("looking for current mode on connector %s\n", + connector->name); + modes[i] = &connector->state->crtc->mode; + } + crtcs[i] = new_crtc; + + DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", + connector->name, + connector->state->crtc->base.id, + connector->state->crtc->name, + modes[i]->hdisplay, modes[i]->vdisplay, + modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : ""); + + fallback = false; + conn_configured |= BIT(i); + } + + if ((conn_configured & mask) != mask && conn_configured != conn_seq) + goto retry; + + /* + * If the BIOS didn't enable everything it could, fall back to have the + * same user experiencing of lighting up as much as possible like the + * fbdev helper library. + */ + if (num_connectors_enabled != num_connectors_detected && + num_connectors_enabled < dev->mode_config.num_crtc) { + DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); + DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, + num_connectors_detected); + fallback = true; + } + + if (fallback) { +bail: + DRM_DEBUG_KMS("Not using firmware configuration\n"); + memcpy(enabled, save_enabled, count); + ret = false; + } + + drm_modeset_drop_locks(&ctx); + drm_modeset_acquire_fini(&ctx); + + kfree(save_enabled); + return ret; +} + +/** + * drm_client_modeset_probe() - Probe for displays + * @client: DRM client + * @width: Maximum display mode width (optional) + * @height: Maximum display mode height (optional) + * + * This function sets up display pipelines for enabled connectors and stores the + * config in the client's modeset array. + * + * Returns: + * Zero on success or negative error code on failure. + */ +int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height) +{ + struct drm_connector *connector, **connectors = NULL; + struct drm_connector_list_iter conn_iter; + struct drm_device *dev = client->dev; + unsigned int total_modes_count = 0; + struct drm_client_offset *offsets; + unsigned int connector_count = 0; + struct drm_display_mode **modes; + struct drm_crtc **crtcs; + int i, ret = 0; + bool *enabled; + + DRM_DEBUG_KMS("\n"); + + if (!width) + width = dev->mode_config.max_width; + if (!height) + height = dev->mode_config.max_height; + + drm_connector_list_iter_begin(dev, &conn_iter); + drm_client_for_each_connector_iter(connector, &conn_iter) { + struct drm_connector **tmp; + + tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL); + if (!tmp) { + ret = -ENOMEM; + goto free_connectors; + } + + connectors = tmp; + drm_connector_get(connector); + connectors[connector_count++] = connector; + } + drm_connector_list_iter_end(&conn_iter); + + if (!connector_count) + return 0; + + crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); + modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL); + offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL); + enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL); + if (!crtcs || !modes || !enabled || !offsets) { + DRM_ERROR("Memory allocation failed\n"); + ret = -ENOMEM; + goto out; + } + + mutex_lock(&client->modeset_mutex); + + mutex_lock(&dev->mode_config.mutex); + for (i = 0; i < connector_count; i++) + total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height); + if (!total_modes_count) + DRM_DEBUG_KMS("No connectors reported connected with modes\n"); + drm_client_connectors_enabled(connectors, connector_count, enabled); + + if (!drm_client_firmware_config(client, connectors, connector_count, crtcs, + modes, offsets, enabled, width, height)) { + memset(modes, 0, connector_count * sizeof(*modes)); + memset(crtcs, 0, connector_count * sizeof(*crtcs)); + memset(offsets, 0, connector_count * sizeof(*offsets)); + + if (!drm_client_target_cloned(dev, connectors, connector_count, modes, + offsets, enabled, width, height) && + !drm_client_target_preferred(connectors, connector_count, modes, + offsets, enabled, width, height)) + DRM_ERROR("Unable to find initial modes\n"); + + DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", + width, height); + + drm_client_pick_crtcs(client, connectors, connector_count, + crtcs, modes, 0, width, height); + } + mutex_unlock(&dev->mode_config.mutex); + + drm_client_modeset_release(client); + + for (i = 0; i < connector_count; i++) { + struct drm_display_mode *mode = modes[i]; + struct drm_crtc *crtc = crtcs[i]; + struct drm_client_offset *offset = &offsets[i]; + + if (mode && crtc) { + struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc); + struct drm_connector *connector = connectors[i]; + + DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", + mode->name, crtc->base.id, offset->x, offset->y); + + if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS || + (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) { + ret = -EINVAL; + break; + } + + modeset->mode = drm_mode_duplicate(dev, mode); + drm_connector_get(connector); + modeset->connectors[modeset->num_connectors++] = connector; + modeset->x = offset->x; + modeset->y = offset->y; + } + } + + mutex_unlock(&client->modeset_mutex); +out: + kfree(crtcs); + kfree(modes); + kfree(offsets); + kfree(enabled); +free_connectors: + for (i = 0; i < connector_count; i++) + drm_connector_put(connectors[i]); + kfree(connectors); + + return ret; +} +EXPORT_SYMBOL(drm_client_modeset_probe);

/** * drm_client_panel_rotation() - Check panel orientation diff --git a/drivers/gpu/drm/drm_fb_helper.c b/drivers/gpu/drm/drm_fb_helper.c index e7f41e5d924c..946cae196475 100644 --- a/drivers/gpu/drm/drm_fb_helper.c +++ b/drivers/gpu/drm/drm_fb_helper.c @@ -48,10 +48,6 @@

#include "drm_internal.h"

-struct drm_client_offset { - int x, y; -}; - static bool drm_fbdev_emulation = true; module_param_named(fbdev_emulation, drm_fbdev_emulation, bool, 0600); MODULE_PARM_DESC(fbdev_emulation, @@ -1703,694 +1699,6 @@ void drm_fb_helper_fill_info(struct fb_info *info, } EXPORT_SYMBOL(drm_fb_helper_fill_info);

-static struct drm_display_mode * -drm_connector_has_preferred_mode(struct drm_connector *connector, int width, int height) -{ - struct drm_display_mode *mode; - - list_for_each_entry(mode, &connector->modes, head) { - if (mode->hdisplay > width || - mode->vdisplay > height) - continue; - if (mode->type & DRM_MODE_TYPE_PREFERRED) - return mode; - } - return NULL; -} - -static struct drm_display_mode * -drm_connector_pick_cmdline_mode(struct drm_connector *connector) -{ - struct drm_cmdline_mode *cmdline_mode; - struct drm_display_mode *mode; - bool prefer_non_interlace; - - cmdline_mode = &connector->cmdline_mode; - if (cmdline_mode->specified == false) - return NULL; - - /* attempt to find a matching mode in the list of modes - * we have gotten so far, if not add a CVT mode that conforms - */ - if (cmdline_mode->rb || cmdline_mode->margins) - goto create_mode; - - prefer_non_interlace = !cmdline_mode->interlace; -again: - list_for_each_entry(mode, &connector->modes, head) { - /* check width/height */ - if (mode->hdisplay != cmdline_mode->xres || - mode->vdisplay != cmdline_mode->yres) - continue; - - if (cmdline_mode->refresh_specified) { - if (mode->vrefresh != cmdline_mode->refresh) - continue; - } - - if (cmdline_mode->interlace) { - if (!(mode->flags & DRM_MODE_FLAG_INTERLACE)) - continue; - } else if (prefer_non_interlace) { - if (mode->flags & DRM_MODE_FLAG_INTERLACE) - continue; - } - return mode; - } - - if (prefer_non_interlace) { - prefer_non_interlace = false; - goto again; - } - -create_mode: - mode = drm_mode_create_from_cmdline_mode(connector->dev, cmdline_mode); - list_add(&mode->head, &connector->modes); - - return mode; -} - -static bool drm_connector_enabled(struct drm_connector *connector, bool strict) -{ - bool enable; - - if (connector->display_info.non_desktop) - return false; - - if (strict) - enable = connector->status == connector_status_connected; - else - enable = connector->status != connector_status_disconnected; - - return enable; -} - -static void drm_client_connectors_enabled(struct drm_connector **connectors, - unsigned int connector_count, - bool *enabled) -{ - bool any_enabled = false; - struct drm_connector *connector; - int i = 0; - - for (i = 0; i < connector_count; i++) { - connector = connectors[i]; - enabled[i] = drm_connector_enabled(connector, true); - DRM_DEBUG_KMS("connector %d enabled? %s\n", connector->base.id, - connector->display_info.non_desktop ? "non desktop" : enabled[i] ? "yes" : "no"); - - any_enabled |= enabled[i]; - } - - if (any_enabled) - return; - - for (i = 0; i < connector_count; i++) - enabled[i] = drm_connector_enabled(connectors[i], false); -} - -static bool drm_client_target_cloned(struct drm_device *dev, - struct drm_connector **connectors, - unsigned int connector_count, - struct drm_display_mode **modes, - struct drm_client_offset *offsets, - bool *enabled, int width, int height) -{ - int count, i, j; - bool can_clone = false; - struct drm_display_mode *dmt_mode, *mode; - - /* only contemplate cloning in the single crtc case */ - if (dev->mode_config.num_crtc > 1) - return false; - - count = 0; - for (i = 0; i < connector_count; i++) { - if (enabled[i]) - count++; - } - - /* only contemplate cloning if more than one connector is enabled */ - if (count <= 1) - return false; - - /* check the command line or if nothing common pick 1024x768 */ - can_clone = true; - for (i = 0; i < connector_count; i++) { - if (!enabled[i]) - continue; - modes[i] = drm_connector_pick_cmdline_mode(connectors[i]); - if (!modes[i]) { - can_clone = false; - break; - } - for (j = 0; j < i; j++) { - if (!enabled[j]) - continue; - if (!drm_mode_match(modes[j], modes[i], - DRM_MODE_MATCH_TIMINGS | - DRM_MODE_MATCH_CLOCK | - DRM_MODE_MATCH_FLAGS | - DRM_MODE_MATCH_3D_FLAGS)) - can_clone = false; - } - } - - if (can_clone) { - DRM_DEBUG_KMS("can clone using command line\n"); - return true; - } - - /* try and find a 1024x768 mode on each connector */ - can_clone = true; - dmt_mode = drm_mode_find_dmt(dev, 1024, 768, 60, false); - - for (i = 0; i < connector_count; i++) { - if (!enabled[i]) - continue; - - list_for_each_entry(mode, &connectors[i]->modes, head) { - if (drm_mode_match(mode, dmt_mode, - DRM_MODE_MATCH_TIMINGS | - DRM_MODE_MATCH_CLOCK | - DRM_MODE_MATCH_FLAGS | - DRM_MODE_MATCH_3D_FLAGS)) - modes[i] = mode; - } - if (!modes[i]) - can_clone = false; - } - - if (can_clone) { - DRM_DEBUG_KMS("can clone using 1024x768\n"); - return true; - } - DRM_INFO("kms: can't enable cloning when we probably wanted to.\n"); - return false; -} - -static int drm_client_get_tile_offsets(struct drm_connector **connectors, - unsigned int connector_count, - struct drm_display_mode **modes, - struct drm_client_offset *offsets, - int idx, - int h_idx, int v_idx) -{ - struct drm_connector *connector; - int i; - int hoffset = 0, voffset = 0; - - for (i = 0; i < connector_count; i++) { - connector = connectors[i]; - if (!connector->has_tile) - continue; - - if (!modes[i] && (h_idx || v_idx)) { - DRM_DEBUG_KMS("no modes for connector tiled %d %d\n", i, - connector->base.id); - continue; - } - if (connector->tile_h_loc < h_idx) - hoffset += modes[i]->hdisplay; - - if (connector->tile_v_loc < v_idx) - voffset += modes[i]->vdisplay; - } - offsets[idx].x = hoffset; - offsets[idx].y = voffset; - DRM_DEBUG_KMS("returned %d %d for %d %d\n", hoffset, voffset, h_idx, v_idx); - return 0; -} - -static bool drm_client_target_preferred(struct drm_connector **connectors, - unsigned int connector_count, - struct drm_display_mode **modes, - struct drm_client_offset *offsets, - bool *enabled, int width, int height) -{ - const u64 mask = BIT_ULL(connector_count) - 1; - struct drm_connector *connector; - u64 conn_configured = 0; - int tile_pass = 0; - int i; - -retry: - for (i = 0; i < connector_count; i++) { - connector = connectors[i]; - - if (conn_configured & BIT_ULL(i)) - continue; - - if (enabled[i] == false) { - conn_configured |= BIT_ULL(i); - continue; - } - - /* first pass over all the untiled connectors */ - if (tile_pass == 0 && connector->has_tile) - continue; - - if (tile_pass == 1) { - if (connector->tile_h_loc != 0 || - connector->tile_v_loc != 0) - continue; - - } else { - if (connector->tile_h_loc != tile_pass - 1 && - connector->tile_v_loc != tile_pass - 1) - /* if this tile_pass doesn't cover any of the tiles - keep going */ - continue; - - /* - * find the tile offsets for this pass - need to find - * all tiles left and above - */ - drm_client_get_tile_offsets(connectors, connector_count, modes, offsets, i, - connector->tile_h_loc, connector->tile_v_loc); - } - DRM_DEBUG_KMS("looking for cmdline mode on connector %d\n", - connector->base.id); - - /* got for command line mode first */ - modes[i] = drm_connector_pick_cmdline_mode(connector); - if (!modes[i]) { - DRM_DEBUG_KMS("looking for preferred mode on connector %d %d\n", - connector->base.id, connector->tile_group ? connector->tile_group->id : 0); - modes[i] = drm_connector_has_preferred_mode(connector, width, height); - } - /* No preferred modes, pick one off the list */ - if (!modes[i] && !list_empty(&connector->modes)) { - list_for_each_entry(modes[i], &connector->modes, head) - break; - } - DRM_DEBUG_KMS("found mode %s\n", modes[i] ? modes[i]->name : - "none"); - conn_configured |= BIT_ULL(i); - } - - if ((conn_configured & mask) != mask) { - tile_pass++; - goto retry; - } - return true; -} - -static bool connector_has_possible_crtc(struct drm_connector *connector, - struct drm_crtc *crtc) -{ - struct drm_encoder *encoder; - int i; - - drm_connector_for_each_possible_encoder(connector, encoder, i) { - if (encoder->possible_crtcs & drm_crtc_mask(crtc)) - return true; - } - - return false; -} - -static int drm_client_pick_crtcs(struct drm_client_dev *client, - struct drm_connector **connectors, - unsigned int connector_count, - struct drm_crtc **best_crtcs, - struct drm_display_mode **modes, - int n, int width, int height) -{ - struct drm_device *dev = client->dev; - struct drm_connector *connector; - int my_score, best_score, score; - struct drm_crtc **crtcs, *crtc; - struct drm_mode_set *modeset; - int o; - - if (n == connector_count) - return 0; - - connector = connectors[n]; - - best_crtcs[n] = NULL; - best_score = drm_client_pick_crtcs(client, connectors, connector_count, - best_crtcs, modes, n + 1, width, height); - if (modes[n] == NULL) - return best_score; - - crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); - if (!crtcs) - return best_score; - - my_score = 1; - if (connector->status == connector_status_connected) - my_score++; - if (connector->cmdline_mode.specified) - my_score++; - if (drm_connector_has_preferred_mode(connector, width, height)) - my_score++; - - /* - * select a crtc for this connector and then attempt to configure - * remaining connectors - */ - drm_client_for_each_modeset(modeset, client) { - crtc = modeset->crtc; - - if (!connector_has_possible_crtc(connector, crtc)) - continue; - - for (o = 0; o < n; o++) - if (best_crtcs[o] == crtc) - break; - - if (o < n) { - /* ignore cloning unless only a single crtc */ - if (dev->mode_config.num_crtc > 1) - continue; - - if (!drm_mode_equal(modes[o], modes[n])) - continue; - } - - crtcs[n] = crtc; - memcpy(crtcs, best_crtcs, n * sizeof(*crtcs)); - score = my_score + drm_client_pick_crtcs(client, connectors, connector_count, - crtcs, modes, n + 1, width, height); - if (score > best_score) { - best_score = score; - memcpy(best_crtcs, crtcs, connector_count * sizeof(*crtcs)); - } - } - - kfree(crtcs); - return best_score; -} - -/* Try to read the BIOS display configuration and use it for the initial config */ -static bool drm_client_firmware_config(struct drm_client_dev *client, - struct drm_connector **connectors, - unsigned int connector_count, - struct drm_crtc **crtcs, - struct drm_display_mode **modes, - struct drm_client_offset *offsets, - bool *enabled, int width, int height) -{ - unsigned int count = min_t(unsigned int, connector_count, BITS_PER_LONG); - unsigned long conn_configured, conn_seq, mask; - struct drm_device *dev = client->dev; - int i, j; - bool *save_enabled; - bool fallback = true, ret = true; - int num_connectors_enabled = 0; - int num_connectors_detected = 0; - struct drm_modeset_acquire_ctx ctx; - - if (!drm_drv_uses_atomic_modeset(dev)) - return false; - - save_enabled = kcalloc(count, sizeof(bool), GFP_KERNEL); - if (!save_enabled) - return false; - - drm_modeset_acquire_init(&ctx, 0); - - while (drm_modeset_lock_all_ctx(dev, &ctx) != 0) - drm_modeset_backoff(&ctx); - - memcpy(save_enabled, enabled, count); - mask = GENMASK(count - 1, 0); - conn_configured = 0; -retry: - conn_seq = conn_configured; - for (i = 0; i < count; i++) { - struct drm_connector *connector; - struct drm_encoder *encoder; - struct drm_crtc *new_crtc; - - connector = connectors[i]; - - if (conn_configured & BIT(i)) - continue; - - if (conn_seq == 0 && !connector->has_tile) - continue; - - if (connector->status == connector_status_connected) - num_connectors_detected++; - - if (!enabled[i]) { - DRM_DEBUG_KMS("connector %s not enabled, skipping\n", - connector->name); - conn_configured |= BIT(i); - continue; - } - - if (connector->force == DRM_FORCE_OFF) { - DRM_DEBUG_KMS("connector %s is disabled by user, skipping\n", - connector->name); - enabled[i] = false; - continue; - } - - encoder = connector->state->best_encoder; - if (!encoder || WARN_ON(!connector->state->crtc)) { - if (connector->force > DRM_FORCE_OFF) - goto bail; - - DRM_DEBUG_KMS("connector %s has no encoder or crtc, skipping\n", - connector->name); - enabled[i] = false; - conn_configured |= BIT(i); - continue; - } - - num_connectors_enabled++; - - new_crtc = connector->state->crtc; - - /* - * Make sure we're not trying to drive multiple connectors - * with a single CRTC, since our cloning support may not - * match the BIOS. - */ - for (j = 0; j < count; j++) { - if (crtcs[j] == new_crtc) { - DRM_DEBUG_KMS("fallback: cloned configuration\n"); - goto bail; - } - } - - DRM_DEBUG_KMS("looking for cmdline mode on connector %s\n", - connector->name); - - /* go for command line mode first */ - modes[i] = drm_connector_pick_cmdline_mode(connector); - - /* try for preferred next */ - if (!modes[i]) { - DRM_DEBUG_KMS("looking for preferred mode on connector %s %d\n", - connector->name, connector->has_tile); - modes[i] = drm_connector_has_preferred_mode(connector, width, height); - } - - /* No preferred mode marked by the EDID? Are there any modes? */ - if (!modes[i] && !list_empty(&connector->modes)) { - DRM_DEBUG_KMS("using first mode listed on connector %s\n", - connector->name); - modes[i] = list_first_entry(&connector->modes, - struct drm_display_mode, - head); - } - - /* last resort: use current mode */ - if (!modes[i]) { - /* - * IMPORTANT: We want to use the adjusted mode (i.e. - * after the panel fitter upscaling) as the initial - * config, not the input mode, which is what crtc->mode - * usually contains. But since our current - * code puts a mode derived from the post-pfit timings - * into crtc->mode this works out correctly. - * - * This is crtc->mode and not crtc->state->mode for the - * fastboot check to work correctly. - */ - DRM_DEBUG_KMS("looking for current mode on connector %s\n", - connector->name); - modes[i] = &connector->state->crtc->mode; - } - crtcs[i] = new_crtc; - - DRM_DEBUG_KMS("connector %s on [CRTC:%d:%s]: %dx%d%s\n", - connector->name, - connector->state->crtc->base.id, - connector->state->crtc->name, - modes[i]->hdisplay, modes[i]->vdisplay, - modes[i]->flags & DRM_MODE_FLAG_INTERLACE ? "i" : ""); - - fallback = false; - conn_configured |= BIT(i); - } - - if ((conn_configured & mask) != mask && conn_configured != conn_seq) - goto retry; - - /* - * If the BIOS didn't enable everything it could, fall back to have the - * same user experiencing of lighting up as much as possible like the - * fbdev helper library. - */ - if (num_connectors_enabled != num_connectors_detected && - num_connectors_enabled < dev->mode_config.num_crtc) { - DRM_DEBUG_KMS("fallback: Not all outputs enabled\n"); - DRM_DEBUG_KMS("Enabled: %i, detected: %i\n", num_connectors_enabled, - num_connectors_detected); - fallback = true; - } - - if (fallback) { -bail: - DRM_DEBUG_KMS("Not using firmware configuration\n"); - memcpy(enabled, save_enabled, count); - ret = false; - } - - drm_modeset_drop_locks(&ctx); - drm_modeset_acquire_fini(&ctx); - - kfree(save_enabled); - return ret; -} - -/** - * drm_client_modeset_probe() - Probe for displays - * @client: DRM client - * @width: Maximum display mode width (optional) - * @height: Maximum display mode height (optional) - * - * This function sets up display pipelines for enabled connectors and stores the - * config in the client's modeset array. - * - * Returns: - * Zero on success or negative error code on failure. - */ -int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height) -{ - struct drm_connector *connector, **connectors = NULL; - struct drm_connector_list_iter conn_iter; - struct drm_device *dev = client->dev; - unsigned int total_modes_count = 0; - struct drm_client_offset *offsets; - unsigned int connector_count = 0; - struct drm_display_mode **modes; - struct drm_crtc **crtcs; - int i, ret = 0; - bool *enabled; - - DRM_DEBUG_KMS("\n"); - - if (!width) - width = dev->mode_config.max_width; - if (!height) - height = dev->mode_config.max_height; - - drm_connector_list_iter_begin(dev, &conn_iter); - drm_client_for_each_connector_iter(connector, &conn_iter) { - struct drm_connector **tmp; - - tmp = krealloc(connectors, (connector_count + 1) * sizeof(*connectors), GFP_KERNEL); - if (!tmp) { - ret = -ENOMEM; - goto free_connectors; - } - - connectors = tmp; - drm_connector_get(connector); - connectors[connector_count++] = connector; - } - drm_connector_list_iter_end(&conn_iter); - - if (!connector_count) - return 0; - - crtcs = kcalloc(connector_count, sizeof(*crtcs), GFP_KERNEL); - modes = kcalloc(connector_count, sizeof(*modes), GFP_KERNEL); - offsets = kcalloc(connector_count, sizeof(*offsets), GFP_KERNEL); - enabled = kcalloc(connector_count, sizeof(bool), GFP_KERNEL); - if (!crtcs || !modes || !enabled || !offsets) { - DRM_ERROR("Memory allocation failed\n"); - ret = -ENOMEM; - goto out; - } - - mutex_lock(&client->modeset_mutex); - - mutex_lock(&dev->mode_config.mutex); - for (i = 0; i < connector_count; i++) - total_modes_count += connectors[i]->funcs->fill_modes(connectors[i], width, height); - if (!total_modes_count) - DRM_DEBUG_KMS("No connectors reported connected with modes\n"); - drm_client_connectors_enabled(connectors, connector_count, enabled); - - if (!drm_client_firmware_config(client, connectors, connector_count, crtcs, - modes, offsets, enabled, width, height)) { - memset(modes, 0, connector_count * sizeof(*modes)); - memset(crtcs, 0, connector_count * sizeof(*crtcs)); - memset(offsets, 0, connector_count * sizeof(*offsets)); - - if (!drm_client_target_cloned(dev, connectors, connector_count, modes, - offsets, enabled, width, height) && - !drm_client_target_preferred(connectors, connector_count, modes, - offsets, enabled, width, height)) - DRM_ERROR("Unable to find initial modes\n"); - - DRM_DEBUG_KMS("picking CRTCs for %dx%d config\n", - width, height); - - drm_client_pick_crtcs(client, connectors, connector_count, - crtcs, modes, 0, width, height); - } - mutex_unlock(&dev->mode_config.mutex); - - drm_client_modeset_release(client); - - for (i = 0; i < connector_count; i++) { - struct drm_display_mode *mode = modes[i]; - struct drm_crtc *crtc = crtcs[i]; - struct drm_client_offset *offset = &offsets[i]; - - if (mode && crtc) { - struct drm_mode_set *modeset = drm_client_find_modeset(client, crtc); - struct drm_connector *connector = connectors[i]; - - DRM_DEBUG_KMS("desired mode %s set on crtc %d (%d,%d)\n", - mode->name, crtc->base.id, offset->x, offset->y); - - if (WARN_ON_ONCE(modeset->num_connectors == DRM_CLIENT_MAX_CLONED_CONNECTORS || - (dev->mode_config.num_crtc > 1 && modeset->num_connectors == 1))) { - ret = -EINVAL; - break; - } - - modeset->mode = drm_mode_duplicate(dev, mode); - drm_connector_get(connector); - modeset->connectors[modeset->num_connectors++] = connector; - modeset->x = offset->x; - modeset->y = offset->y; - } - } - - mutex_unlock(&client->modeset_mutex); -out: - kfree(crtcs); - kfree(modes); - kfree(offsets); - kfree(enabled); -free_connectors: - for (i = 0; i < connector_count; i++) - drm_connector_put(connectors[i]); - kfree(connectors); - - return ret; -} - /* * This is a continuation of drm_setup_crtcs() that sets up anything related * to the framebuffer. During initialization, drm_setup_crtcs() is called before diff --git a/include/drm/drm_client.h b/include/drm/drm_client.h index 8d94880bbe25..f2d5ed745733 100644 --- a/include/drm/drm_client.h +++ b/include/drm/drm_client.h @@ -18,8 +18,6 @@ struct drm_gem_object; struct drm_minor; struct module;

-#define DRM_CLIENT_MAX_CLONED_CONNECTORS 8 - /** * struct drm_client_funcs - DRM client callbacks */ @@ -154,8 +152,7 @@ void drm_client_framebuffer_delete(struct drm_client_buffer *buffer);

int drm_client_modeset_create(struct drm_client_dev *client); void drm_client_modeset_free(struct drm_client_dev *client); -void drm_client_modeset_release(struct drm_client_dev *client); -struct drm_mode_set *drm_client_find_modeset(struct drm_client_dev *client, struct drm_crtc *crtc); +int drm_client_modeset_probe(struct drm_client_dev *client, unsigned int width, unsigned int height); bool drm_client_panel_rotation(struct drm_mode_set *modeset, unsigned int *rotation); int drm_client_modeset_commit_force(struct drm_client_dev *client); int drm_client_modeset_commit(struct drm_client_dev *client);