[PATCH v4 32/80] drm/omap: dsi: convert to drm_panel

From: Sebastian Reichel sebastian.reichel@collabora.com

This converts the DSI module to expect common drm_panel display drivers instead of dssdev based ones.

Signed-off-by: Sebastian Reichel sebastian.reichel@collabora.com Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com --- .../gpu/drm/omapdrm/displays/panel-dsi-cm.c | 203 +++++++----------- drivers/gpu/drm/omapdrm/dss/dsi.c | 128 +++++++++-- .../gpu/drm/omapdrm/dss/omapdss-boot-init.c | 1 - drivers/gpu/drm/omapdrm/dss/omapdss.h | 8 - 4 files changed, 182 insertions(+), 158 deletions(-)

diff --git a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c index 389efed5e9dd..5d6a001f8f71 100644 --- a/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c +++ b/drivers/gpu/drm/omapdrm/displays/panel-dsi-cm.c @@ -6,8 +6,6 @@ * Author: Tomi Valkeinen tomi.valkeinen@ti.com */

-/* #define DEBUG */ - #include <linux/backlight.h> #include <linux/delay.h> #include <linux/gpio/consumer.h> @@ -20,11 +18,14 @@ #include <linux/regulator/consumer.h>

#include <drm/drm_connector.h> +#include <drm/drm_mipi_dsi.h> +#include <drm/drm_modes.h> +#include <drm/drm_panel.h>

+#include <video/display_timing.h> #include <video/mipi_display.h> #include <video/of_display_timing.h> - -#include "../dss/omapdss.h" +#include <video/videomode.h>

#define DCS_READ_NUM_ERRORS 0x05 #define DCS_GET_ID1 0xda @@ -35,11 +36,8 @@

struct panel_drv_data { struct mipi_dsi_device *dsi; - - struct omap_dss_device dssdev; - struct omap_dss_device *src; - - struct videomode vm; + struct drm_panel panel; + struct drm_display_mode mode;

struct mutex lock;

@@ -67,7 +65,10 @@ struct panel_drv_data { bool intro_printed; };

-#define to_panel_data(p) container_of(p, struct panel_drv_data, dssdev) +static inline struct panel_drv_data *panel_to_ddata(struct drm_panel *panel) +{ + return container_of(panel, struct panel_drv_data, panel); +}

static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable);

@@ -282,7 +283,6 @@ static void dsicm_hw_reset(struct panel_drv_data *ddata)

static int dsicm_power_on(struct panel_drv_data *ddata) { - struct omap_dss_device *src = ddata->src; u8 id1, id2, id3; int r;

@@ -319,10 +319,6 @@ static int dsicm_power_on(struct panel_drv_data *ddata) if (r) goto err;

- r = src->ops->dsi.enable_video_output(src, ddata->dsi->channel); - if (r) - goto err; - ddata->enabled = true;

if (!ddata->intro_printed) { @@ -342,15 +338,12 @@ static int dsicm_power_on(struct panel_drv_data *ddata) return r; }

-static void dsicm_power_off(struct panel_drv_data *ddata) +static int dsicm_power_off(struct panel_drv_data *ddata) { - struct omap_dss_device *src = ddata->src; int r;

ddata->enabled = false;

- src->ops->dsi.disable_video_output(src, ddata->dsi->channel); - r = mipi_dsi_dcs_set_display_off(ddata->dsi); if (!r) r = dsicm_sleep_in(ddata); @@ -360,51 +353,25 @@ static void dsicm_power_off(struct panel_drv_data *ddata) "error disabling panel, issuing HW reset\n"); dsicm_hw_reset(ddata); } -} - -static int dsicm_connect(struct omap_dss_device *src, - struct omap_dss_device *dst) -{ - struct panel_drv_data *ddata = to_panel_data(dst); - - ddata->src = src; - return 0; -}

-static void dsicm_disconnect(struct omap_dss_device *src, - struct omap_dss_device *dst) -{ - struct panel_drv_data *ddata = to_panel_data(dst); - - ddata->src = NULL; + return r; }

-static void dsicm_pre_enable(struct omap_dss_device *dssdev) +static int dsicm_prepare(struct drm_panel *panel) { - struct panel_drv_data *ddata = to_panel_data(dssdev); - struct omap_dss_device *src = ddata->src; + struct panel_drv_data *ddata = panel_to_ddata(panel); int r; - struct omap_dss_dsi_config dsi_config = { - .vm = &ddata->vm, - .hs_clk_min = 150000000, - .hs_clk_max = 300000000, - .lp_clk_min = 7000000, - .lp_clk_max = 10000000, - };

r = regulator_bulk_enable(ARRAY_SIZE(ddata->supplies), ddata->supplies); if (r) dev_err(&ddata->dsi->dev, "failed to enable supplies: %d\n", r);

- r = src->ops->dsi.set_config(src, &dsi_config); - if (r) { - dev_err(&ddata->dsi->dev, "failed to configure DSI\n"); - } + return r; }

-static void dsicm_enable(struct omap_dss_device *dssdev) +static int dsicm_enable(struct drm_panel *panel) { - struct panel_drv_data *ddata = to_panel_data(dssdev); + struct panel_drv_data *ddata = panel_to_ddata(panel); int r;

mutex_lock(&ddata->lock); @@ -417,33 +384,39 @@ static void dsicm_enable(struct omap_dss_device *dssdev)

dsicm_bl_power(ddata, true);

- return; + return 0; err: - dev_dbg(&ddata->dsi->dev, "enable failed (%d)\n", r); + dev_err(&ddata->dsi->dev, "enable failed (%d)\n", r); mutex_unlock(&ddata->lock); + return r; +} + +static int dsicm_unprepare(struct drm_panel *panel) +{ + struct panel_drv_data *ddata = panel_to_ddata(panel); + int r; + + r = regulator_bulk_disable(ARRAY_SIZE(ddata->supplies), ddata->supplies); + if (r) + dev_err(&ddata->dsi->dev, "failed to disable supplies: %d\n", r); + + return r; }

-static void dsicm_disable(struct omap_dss_device *dssdev) +static int dsicm_disable(struct drm_panel *panel) { - struct panel_drv_data *ddata = to_panel_data(dssdev); + struct panel_drv_data *ddata = panel_to_ddata(panel); + int r;

dsicm_bl_power(ddata, false);

mutex_lock(&ddata->lock);

- dsicm_power_off(ddata); + r = dsicm_power_off(ddata);

mutex_unlock(&ddata->lock); -} - -static void dsicm_post_disable(struct omap_dss_device *dssdev) -{ - struct panel_drv_data *ddata = to_panel_data(dssdev); - int r;

- r = regulator_bulk_disable(ARRAY_SIZE(ddata->supplies), ddata->supplies); - if (r) - dev_err(&ddata->dsi->dev, "failed to disable supplies: %d\n", r); + return r; }

static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable) @@ -462,50 +435,37 @@ static int _dsicm_enable_te(struct panel_drv_data *ddata, bool enable) return r; }

-static int dsicm_get_modes(struct omap_dss_device *dssdev, +static int dsicm_get_modes(struct drm_panel *panel, struct drm_connector *connector) { - struct panel_drv_data *ddata = to_panel_data(dssdev); + struct panel_drv_data *ddata = panel_to_ddata(panel); + struct drm_display_mode *mode; + + mode = drm_mode_duplicate(connector->dev, &ddata->mode); + if (!mode) { + dev_err(&ddata->dsi->dev, "failed to add mode %ux%ux@%u kHz\n", + ddata->mode.hdisplay, ddata->mode.vdisplay, + ddata->mode.clock); + return -ENOMEM; + } + + drm_mode_set_name(mode); + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;

connector->display_info.width_mm = ddata->width_mm; connector->display_info.height_mm = ddata->height_mm;

- return omapdss_display_get_modes(connector, &ddata->vm); -} - -static int dsicm_check_timings(struct omap_dss_device *dssdev, - struct drm_display_mode *mode) -{ - struct panel_drv_data *ddata = to_panel_data(dssdev); - int ret = 0; - - if (mode->hdisplay != ddata->vm.hactive) - ret = -EINVAL; - - if (mode->vdisplay != ddata->vm.vactive) - ret = -EINVAL; + drm_mode_probed_add(connector, mode);

- if (ret) { - dev_warn(dssdev->dev, "wrong resolution: %d x %d", - mode->hdisplay, mode->vdisplay); - dev_warn(dssdev->dev, "panel resolution: %d x %d", - ddata->vm.hactive, ddata->vm.vactive); - } - - return ret; + return 1; }

-static const struct omap_dss_device_ops dsicm_ops = { - .connect = dsicm_connect, - .disconnect = dsicm_disconnect, - - .pre_enable = dsicm_pre_enable, - .enable = dsicm_enable, - .disable = dsicm_disable, - .post_disable = dsicm_post_disable, - - .get_modes = dsicm_get_modes, - .check_timings = dsicm_check_timings, +static const struct drm_panel_funcs dsicm_panel_funcs = { + .unprepare = dsicm_unprepare, + .disable = dsicm_disable, + .prepare = dsicm_prepare, + .enable = dsicm_enable, + .get_modes = dsicm_get_modes, };

static int dsicm_probe_of(struct mipi_dsi_device *dsi) @@ -514,6 +474,10 @@ static int dsicm_probe_of(struct mipi_dsi_device *dsi) struct backlight_device *backlight; struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi); struct display_timing timing; + struct videomode vm = { + .hactive = 864, + .vactive = 480, + }; int err;

ddata->reset_gpio = devm_gpiod_get(&dsi->dev, "reset", GPIOD_OUT_LOW); @@ -525,15 +489,16 @@ static int dsicm_probe_of(struct mipi_dsi_device *dsi)

err = of_get_display_timing(node, "panel-timing", &timing); if (!err) { - videomode_from_timing(&timing, &ddata->vm); - if (!ddata->vm.pixelclock) - ddata->vm.pixelclock = - ddata->vm.hactive * ddata->vm.vactive * 60; + videomode_from_timing(&timing, &vm); } else { dev_warn(&dsi->dev, "failed to get video timing, using defaults\n"); }

+ if (!vm.pixelclock) + vm.pixelclock = vm.hactive * vm.vactive * 60; + drm_display_mode_from_videomode(&vm, &ddata->mode); + ddata->width_mm = 0; of_property_read_u32(node, "width-mm", &ddata->width_mm);

@@ -565,7 +530,6 @@ static int dsicm_probe(struct mipi_dsi_device *dsi) struct panel_drv_data *ddata; struct backlight_device *bldev = NULL; struct device *dev = &dsi->dev; - struct omap_dss_device *dssdev; int r;

dev_dbg(dev, "probe\n"); @@ -577,30 +541,17 @@ static int dsicm_probe(struct mipi_dsi_device *dsi) mipi_dsi_set_drvdata(dsi, ddata); ddata->dsi = dsi;

- ddata->vm.hactive = 864; - ddata->vm.vactive = 480; - ddata->vm.pixelclock = 864 * 480 * 60; - r = dsicm_probe_of(dsi); if (r) return r;

- dssdev = &ddata->dssdev; - dssdev->dev = dev; - dssdev->ops = &dsicm_ops; - dssdev->type = OMAP_DISPLAY_TYPE_DSI; - dssdev->display = true; - dssdev->owner = THIS_MODULE; - dssdev->of_port = 0; - dssdev->ops_flags = OMAP_DSS_DEVICE_OP_MODES; - - omapdss_display_init(dssdev); - omapdss_device_register(dssdev); - mutex_init(&ddata->lock);

dsicm_hw_reset(ddata);

+ drm_panel_init(&ddata->panel, dev, &dsicm_panel_funcs, + DRM_MODE_CONNECTOR_DSI); + if (ddata->use_dsi_backlight) { struct backlight_properties props = { 0 }; props.max_brightness = 255; @@ -629,6 +580,8 @@ static int dsicm_probe(struct mipi_dsi_device *dsi) dsi->hs_rate = 300000000; dsi->lp_rate = 10000000;

+ drm_panel_add(&ddata->panel); + r = mipi_dsi_attach(dsi); if (r < 0) goto err_dsi_attach; @@ -636,6 +589,7 @@ static int dsicm_probe(struct mipi_dsi_device *dsi) return 0;

err_dsi_attach: + drm_panel_remove(&ddata->panel); sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group); err_bl: if (ddata->extbldev) @@ -647,15 +601,12 @@ static int dsicm_probe(struct mipi_dsi_device *dsi) static int __exit dsicm_remove(struct mipi_dsi_device *dsi) { struct panel_drv_data *ddata = mipi_dsi_get_drvdata(dsi); - struct omap_dss_device *dssdev = &ddata->dssdev;

dev_dbg(&dsi->dev, "remove\n");

mipi_dsi_detach(dsi);

- omapdss_device_unregister(dssdev); - - omapdss_device_disconnect(ddata->src, dssdev); + drm_panel_remove(&ddata->panel);

sysfs_remove_group(&dsi->dev.kobj, &dsicm_attr_group);

@@ -669,7 +620,7 @@ static int __exit dsicm_remove(struct mipi_dsi_device *dsi) }

static const struct of_device_id dsicm_of_match[] = { - { .compatible = "omapdss,panel-dsi-cm", }, + { .compatible = "panel-dsi-cm", }, {}, };

diff --git a/drivers/gpu/drm/omapdrm/dss/dsi.c b/drivers/gpu/drm/omapdrm/dss/dsi.c index 1a5ab2fd1d81..93900739237e 100644 --- a/drivers/gpu/drm/omapdrm/dss/dsi.c +++ b/drivers/gpu/drm/omapdrm/dss/dsi.c @@ -36,6 +36,7 @@ #include <linux/sys_soc.h>

#include <drm/drm_mipi_dsi.h> +#include <drm/drm_panel.h> #include <video/mipi_display.h>

#include "omapdss.h" @@ -217,6 +218,8 @@ static int dsi_vc_send_null(struct dsi_data *dsi, int channel); static ssize_t _omap_dsi_host_transfer(struct dsi_data *dsi, const struct mipi_dsi_msg *msg);

+static void dsi_display_disable(struct omap_dss_device *dssdev); + /* DSI PLL HSDIV indices */ #define HSDIV_DISPC 0 #define HSDIV_DSI 1 @@ -384,6 +387,7 @@ struct dsi_data { bool te_enabled; bool ulps_enabled; bool ulps_auto_idle; + bool video_enabled;

struct delayed_work ulps_work;

@@ -424,6 +428,8 @@ struct dsi_data {

unsigned int scp_clk_refcount;

+ struct omap_dss_dsi_config config; + struct dss_lcd_mgr_config mgr_config; struct videomode vm; enum mipi_dsi_pixel_format pix_fmt; @@ -3622,7 +3628,7 @@ static int dsi_configure_pins(struct omap_dss_device *dssdev, return 0; }

-static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel) +static void dsi_enable_video_output(struct omap_dss_device *dssdev, int channel) { struct dsi_data *dsi = to_dsi_data(dssdev); int bpp = mipi_dsi_pixel_format_to_bpp(dsi->pix_fmt); @@ -3631,8 +3637,10 @@ static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel) int r;

r = dsi_display_init_dispc(dsi); - if (r) - return r; + if (r) { + dev_err(dsi->dev, "failed to init dispc!\n"); + return; + }

if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { switch (dsi->pix_fmt) { @@ -3672,7 +3680,7 @@ static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel) if (r) goto err_mgr_enable;

- return 0; + return;

err_mgr_enable: if (dsi->mode == OMAP_DSS_DSI_VIDEO_MODE) { @@ -3681,7 +3689,8 @@ static int dsi_enable_video_output(struct omap_dss_device *dssdev, int channel) } err_pix_fmt: dsi_display_uninit_dispc(dsi); - return r; + dev_err(dsi->dev, "failed to enable DSI encoder!\n"); + return; }

static void dsi_disable_video_output(struct omap_dss_device *dssdev, int channel) @@ -3704,6 +3713,25 @@ static void dsi_disable_video_output(struct omap_dss_device *dssdev, int channel dsi_display_uninit_dispc(dsi); }

+static void dsi_disable_video_outputs(struct omap_dss_device *dssdev) +{ + struct dsi_data *dsi = to_dsi_data(dssdev); + unsigned int i; + + dsi_bus_lock(dsi); + dsi->video_enabled = false; + + for (i = 0; i < 4; i++) { + if (!dsi->vc[i].dest) + continue; + dsi_disable_video_output(dssdev, i); + } + + dsi_display_disable(dssdev); + + dsi_bus_unlock(dsi); +} + static void dsi_update_screen_dispc(struct dsi_data *dsi) { unsigned int bytespp; @@ -3897,6 +3925,11 @@ static int dsi_update_channel(struct omap_dss_device *dssdev, int channel)

dsi_bus_lock(dsi);

+ if (!dsi->video_enabled) { + r = -EIO; + goto err; + } + if (!dsi->vc[channel].dest) { r = -ENODEV; goto err; @@ -4167,8 +4200,30 @@ static void dsi_display_enable(struct omap_dss_device *dssdev) struct dsi_data *dsi = to_dsi_data(dssdev); DSSDBG("dsi_display_enable\n");

- dsi_bus_lock(dsi); + WARN_ON(!dsi_bus_is_locked(dsi)); + _dsi_display_enable(dsi); +} + +static void dsi_enable_video_outputs(struct omap_dss_device *dssdev) +{ + struct dsi_data *dsi = to_dsi_data(dssdev); + unsigned int i; + + dsi_bus_lock(dsi); + + dsi_display_enable(dssdev); + + for (i = 0; i < 4; i++) { + if (!dsi->vc[i].dest) + continue; + dsi_enable_video_output(dssdev, i); + } + + dsi->video_enabled = true; + + dsi_set_ulps_auto(dsi, true); + dsi_bus_unlock(dsi); }

@@ -4195,11 +4250,11 @@ static void dsi_display_disable(struct omap_dss_device *dssdev) { struct dsi_data *dsi = to_dsi_data(dssdev);

+ WARN_ON(!dsi_bus_is_locked(dsi)); + DSSDBG("dsi_display_disable\n");

- dsi_bus_lock(dsi); _dsi_display_disable(dsi, true, false); - dsi_bus_unlock(dsi); }

static int dsi_enable_te(struct dsi_data *dsi, bool enable) @@ -4739,14 +4794,18 @@ static bool dsi_is_video_mode(struct omap_dss_device *dssdev) }

static int dsi_set_config(struct omap_dss_device *dssdev, - const struct omap_dss_dsi_config *config) + const struct drm_display_mode *mode) { struct dsi_data *dsi = to_dsi_data(dssdev); struct dsi_clk_calc_ctx ctx; - struct omap_dss_dsi_config cfg = *config; + struct videomode vm; + struct omap_dss_dsi_config cfg = dsi->config; bool ok; int r;

+ drm_display_mode_to_videomode(mode, &vm); + cfg.vm = &vm; + mutex_lock(&dsi->lock);

cfg.mode = dsi->mode; @@ -4909,9 +4968,15 @@ static ssize_t omap_dsi_host_transfer(struct mipi_dsi_host *host, int r;

dsi_bus_lock(dsi); - dsi_set_ulps_auto(dsi, false); - r = _omap_dsi_host_transfer(dsi, msg); - dsi_set_ulps_auto(dsi, true); + + if (dsi->video_enabled) { + dsi_set_ulps_auto(dsi, false); + r = _omap_dsi_host_transfer(dsi, msg); + dsi_set_ulps_auto(dsi, true); + } else { + r = -EIO; + } + dsi_bus_unlock(dsi);

return r; @@ -4932,6 +4997,23 @@ static int dsi_get_clocks(struct dsi_data *dsi) return 0; }

+static void dsi_set_timings(struct omap_dss_device *dssdev, + const struct drm_display_mode *mode) +{ + DSSDBG("dsi_set_timings\n"); + dsi_set_config(dssdev, mode); +} + +static int dsi_check_timings(struct omap_dss_device *dssdev, + struct drm_display_mode *mode) +{ + DSSDBG("dsi_check_timings\n"); + + /* TODO */ + + return 0; +} + static int dsi_connect(struct omap_dss_device *src, struct omap_dss_device *dst) { @@ -4947,15 +5029,13 @@ static void dsi_disconnect(struct omap_dss_device *src, static const struct omap_dss_device_ops dsi_ops = { .connect = dsi_connect, .disconnect = dsi_disconnect, - .enable = dsi_display_enable, - .disable = dsi_display_disable, + .enable = dsi_enable_video_outputs, + .disable = dsi_disable_video_outputs,

- .dsi = { - .set_config = dsi_set_config, - - .enable_video_output = dsi_enable_video_output, - .disable_video_output = dsi_disable_video_output, + .check_timings = dsi_check_timings, + .set_timings = dsi_set_timings,

+ .dsi = { .update = dsi_update_all, .is_video_mode = dsi_is_video_mode, }, @@ -5083,10 +5163,12 @@ static int omap_dsi_host_attach(struct mipi_dsi_host *host, INIT_DEFERRABLE_WORK(&dsi->ulps_work, omap_dsi_ulps_work_callback);

- dsi_bus_lock(dsi); + dsi->config.hs_clk_min = 150000000; // TODO: get from client? + dsi->config.hs_clk_max = client->hs_rate; + dsi->config.lp_clk_min = 7000000; // TODO: get from client? + dsi->config.lp_clk_max = client->lp_rate; + dsi->ulps_auto_idle = false; - dsi_set_ulps_auto(dsi, true); - dsi_bus_unlock(dsi);

return 0; } diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c index 72a7da7bfff1..18560ca4bbb0 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c +++ b/drivers/gpu/drm/omapdrm/dss/omapdss-boot-init.c @@ -174,7 +174,6 @@ static const struct of_device_id omapdss_of_match[] __initconst = { };

static const struct of_device_id omapdss_of_fixups_whitelist[] __initconst = { - { .compatible = "panel-dsi-cm" }, {}, };

diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h index 4200611525d5..3ee3063b6a2d 100644 --- a/drivers/gpu/drm/omapdrm/dss/omapdss.h +++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h @@ -278,14 +278,6 @@ struct omap_dss_writeback_info { struct omapdss_dsi_ops { int (*update)(struct omap_dss_device *dssdev); bool (*is_video_mode)(struct omap_dss_device *dssdev); - - /* legacy API used by omapdss panels */ - int (*set_config)(struct omap_dss_device *dssdev, - const struct omap_dss_dsi_config *cfg); - - int (*enable_video_output)(struct omap_dss_device *dssdev, int channel); - void (*disable_video_output)(struct omap_dss_device *dssdev, - int channel); };

struct omap_dss_device_ops {