Add DT bindings for Texas Instruments K2G SoC Display Subsystem. The DSS is quite simple, with a single plane and a single output.

Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com Cc: devicetree@vger.kernel.org --- .../devicetree/bindings/display/ti/ti,k2g-dss.txt | 15 +++++++++++++++ 1 file changed, 15 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/ti/ti,k2g-dss.txt

diff --git a/Documentation/devicetree/bindings/display/ti/ti,k2g-dss.txt b/Documentation/devicetree/bindings/display/ti/ti,k2g-dss.txt new file mode 100644 index 000000000000..1af11425eda3 --- /dev/null +++ b/Documentation/devicetree/bindings/display/ti/ti,k2g-dss.txt @@ -0,0 +1,15 @@ +Texas Instruments K2G Display Subsystem +======================================= + +Required properties: +- compatible: "ti,k2g-dss" +- reg: address and length of the register spaces for DSS submodules +- reg-names: "cfg", "common", "vid1", "ovr1", "vp1" +- clocks: phandle to fclk and vp1 clocks +- clock-names: "fck", "vp1" +- interrupts: phandle to the DISPC interrupt + +The DSS outputs are described using the device graphs as documented in +Documentation/devicetree/bindings/graph.txt. K2G DSS has a single DPI output as +port 0. +

This patch adds a new DRM driver for Texas Instruments DSS6 IP used on Texas Instruments Keystone K2G SoC. The DSS6 IP is a major change to the older DSS IP versions, which are supported by the omapdrm driver, and while on higher level the DSS6 resembles the older DSS versions, the registers and the internal pipelines differ a lot.

DSS6 IP on K2G is a "ultra-light" version, and has only a single plane and a single output. The driver will also support future DSS versions, which support multiple planes and outputs, so the driver already has support for those.

Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com --- MAINTAINERS | 8 + drivers/gpu/drm/Kconfig | 2 + drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/tidss/Kconfig | 10 + drivers/gpu/drm/tidss/Makefile | 11 + drivers/gpu/drm/tidss/tidss_crtc.c | 464 +++++++ drivers/gpu/drm/tidss/tidss_crtc.h | 50 + drivers/gpu/drm/tidss/tidss_dispc.h | 146 +++ drivers/gpu/drm/tidss/tidss_dispc6.c | 1397 +++++++++++++++++++++ drivers/gpu/drm/tidss/tidss_dispc6.h | 12 + drivers/gpu/drm/tidss/tidss_dispc6_regs.h | 109 ++ drivers/gpu/drm/tidss/tidss_drv.c | 331 +++++ drivers/gpu/drm/tidss/tidss_drv.h | 41 + drivers/gpu/drm/tidss/tidss_encoder.c | 101 ++ drivers/gpu/drm/tidss/tidss_encoder.h | 22 + drivers/gpu/drm/tidss/tidss_irq.c | 193 +++ drivers/gpu/drm/tidss/tidss_irq.h | 25 + drivers/gpu/drm/tidss/tidss_kms.c | 85 ++ drivers/gpu/drm/tidss/tidss_kms.h | 14 + drivers/gpu/drm/tidss/tidss_plane.c | 187 +++ drivers/gpu/drm/tidss/tidss_plane.h | 25 + 21 files changed, 3234 insertions(+) create mode 100644 drivers/gpu/drm/tidss/Kconfig create mode 100644 drivers/gpu/drm/tidss/Makefile create mode 100644 drivers/gpu/drm/tidss/tidss_crtc.c create mode 100644 drivers/gpu/drm/tidss/tidss_crtc.h create mode 100644 drivers/gpu/drm/tidss/tidss_dispc.h create mode 100644 drivers/gpu/drm/tidss/tidss_dispc6.c create mode 100644 drivers/gpu/drm/tidss/tidss_dispc6.h create mode 100644 drivers/gpu/drm/tidss/tidss_dispc6_regs.h create mode 100644 drivers/gpu/drm/tidss/tidss_drv.c create mode 100644 drivers/gpu/drm/tidss/tidss_drv.h create mode 100644 drivers/gpu/drm/tidss/tidss_encoder.c create mode 100644 drivers/gpu/drm/tidss/tidss_encoder.h create mode 100644 drivers/gpu/drm/tidss/tidss_irq.c create mode 100644 drivers/gpu/drm/tidss/tidss_irq.h create mode 100644 drivers/gpu/drm/tidss/tidss_kms.c create mode 100644 drivers/gpu/drm/tidss/tidss_kms.h create mode 100644 drivers/gpu/drm/tidss/tidss_plane.c create mode 100644 drivers/gpu/drm/tidss/tidss_plane.h

diff --git a/MAINTAINERS b/MAINTAINERS index ca4afd68530c..b9de8b54cc67 100644 --- a/MAINTAINERS +++ b/MAINTAINERS @@ -4780,6 +4780,14 @@ S: Maintained F: drivers/gpu/drm/omapdrm/ F: Documentation/devicetree/bindings/display/ti/

+DRM DRIVERS FOR TI KEYSTONE +M: Tomi Valkeinen tomi.valkeinen@ti.com +R: Jyri Sarha jsarha@ti.com +L: dri-devel@lists.freedesktop.org +S: Maintained +F: drivers/gpu/drm/tidss/ +F: Documentation/devicetree/bindings/display/ti/ti,k2g-dss.txt + DRM DRIVERS FOR VC4 M: Eric Anholt eric@anholt.net T: git git://github.com/anholt/linux diff --git a/drivers/gpu/drm/Kconfig b/drivers/gpu/drm/Kconfig index deeefa7a1773..b8b6c28a6800 100644 --- a/drivers/gpu/drm/Kconfig +++ b/drivers/gpu/drm/Kconfig @@ -289,6 +289,8 @@ source "drivers/gpu/drm/pl111/Kconfig"

source "drivers/gpu/drm/tve200/Kconfig"

+source "drivers/gpu/drm/tidss/Kconfig" + # Keep legacy drivers last

menuconfig DRM_LEGACY diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index 50093ff4479b..3aa032fbb11a 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -103,3 +103,4 @@ obj-$(CONFIG_DRM_MXSFB) += mxsfb/ obj-$(CONFIG_DRM_TINYDRM) += tinydrm/ obj-$(CONFIG_DRM_PL111) += pl111/ obj-$(CONFIG_DRM_TVE200) += tve200/ +obj-$(CONFIG_DRM_TIDSS) += tidss/ diff --git a/drivers/gpu/drm/tidss/Kconfig b/drivers/gpu/drm/tidss/Kconfig new file mode 100644 index 000000000000..818666db08a4 --- /dev/null +++ b/drivers/gpu/drm/tidss/Kconfig @@ -0,0 +1,10 @@ +config DRM_TIDSS + tristate "DRM Support for TI Keystone" + depends on DRM && OF + depends on ARM || ARM64 || COMPILE_TEST + select DRM_KMS_HELPER + select DRM_KMS_CMA_HELPER + select DRM_GEM_CMA_HELPER + select VIDEOMODE_HELPERS + help + TI Keystone diff --git a/drivers/gpu/drm/tidss/Makefile b/drivers/gpu/drm/tidss/Makefile new file mode 100644 index 000000000000..ee6b24db0441 --- /dev/null +++ b/drivers/gpu/drm/tidss/Makefile @@ -0,0 +1,11 @@ +# SPDX-License-Identifier: GPL-2.0 + +tidss-y := tidss_drv.o \ + tidss_kms.o \ + tidss_crtc.o \ + tidss_plane.o \ + tidss_encoder.o \ + tidss_dispc6.o \ + tidss_irq.o + +obj-$(CONFIG_DRM_TIDSS) += tidss.o diff --git a/drivers/gpu/drm/tidss/tidss_crtc.c b/drivers/gpu/drm/tidss/tidss_crtc.c new file mode 100644 index 000000000000..245539b7dc20 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_crtc.c @@ -0,0 +1,464 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#include <drm/drmP.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_plane_helper.h> +#include <video/videomode.h> +#include <uapi/linux/media-bus-format.h> + +#include "tidss_crtc.h" +#include "tidss_dispc.h" +#include "tidss_drv.h" +#include "tidss_irq.h" + +/* ----------------------------------------------------------------------------- + * Page Flip + */ + +static void tidss_crtc_finish_page_flip(struct tidss_crtc *tcrtc) +{ + struct drm_device *ddev = tcrtc->crtc.dev; + struct tidss_device *tidss = ddev->dev_private; + struct drm_pending_vblank_event *event; + unsigned long flags; + bool busy; + + /* + * New settings are taken into use at VFP, and GO bit is cleared at + * the same time. This happens before the vertical blank interrupt. + * So there is a small change that the driver sets GO bit after VFP, but + * before vblank, and we have to check for that case here. + */ + busy = tidss->dispc_ops->vp_go_busy(tidss->dispc, tcrtc->hw_videoport); + if (busy) + return; + + spin_lock_irqsave(&ddev->event_lock, flags); + + event = tcrtc->event; + tcrtc->event = NULL; + + if (!event) { + spin_unlock_irqrestore(&ddev->event_lock, flags); + return; + } + + dev_dbg(ddev->dev, "%s\n", __func__); + + drm_crtc_send_vblank_event(&tcrtc->crtc, event); + + spin_unlock_irqrestore(&ddev->event_lock, flags); + + drm_crtc_vblank_put(&tcrtc->crtc); +} + +void tidss_crtc_vblank_irq(struct drm_crtc *crtc) +{ + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + + drm_crtc_handle_vblank(crtc); + + tidss_crtc_finish_page_flip(tcrtc); +} + +void tidss_crtc_framedone_irq(struct drm_crtc *crtc) +{ + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + + complete(&tcrtc->framedone_completion); +} + +void tidss_crtc_error_irq(struct drm_crtc *crtc, u64 irqstatus) +{ + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + struct drm_device *ddev = crtc->dev; + + dev_err(ddev->dev, "CRTC%u SYNC LOST: (irq %llx)\n", + tcrtc->hw_videoport, irqstatus); +} + + +/* ----------------------------------------------------------------------------- + * CRTC Functions + */ + +static void tidss_mode_to_vm(const struct drm_display_mode *mode, u32 bus_flags, + struct videomode *vm) +{ + drm_display_mode_to_videomode(mode, vm); + + // XXX what should the default values be? + + if (bus_flags & DRM_BUS_FLAG_PIXDATA_POSEDGE) + vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE; + else if (bus_flags & DRM_BUS_FLAG_PIXDATA_NEGEDGE) + vm->flags |= DISPLAY_FLAGS_PIXDATA_NEGEDGE; + else + vm->flags |= DISPLAY_FLAGS_PIXDATA_POSEDGE; + + if (bus_flags & DRM_BUS_FLAG_SYNC_POSEDGE) + vm->flags |= DISPLAY_FLAGS_SYNC_POSEDGE; + else if (bus_flags & DRM_BUS_FLAG_SYNC_NEGEDGE) + vm->flags |= DISPLAY_FLAGS_SYNC_NEGEDGE; + else + vm->flags |= DISPLAY_FLAGS_SYNC_POSEDGE; + + if (bus_flags & DRM_BUS_FLAG_DE_LOW) + vm->flags |= DISPLAY_FLAGS_DE_LOW; + else if (bus_flags & DRM_BUS_FLAG_DE_HIGH) + vm->flags |= DISPLAY_FLAGS_DE_HIGH; + else + vm->flags |= DISPLAY_FLAGS_DE_HIGH; +} + +struct tidss_bus_format { + u32 media_bus_fmt; + u32 data_width; +}; + +static const struct tidss_bus_format tidss_bus_formats[] = { + { MEDIA_BUS_FMT_RGB444_1X12, 12, }, + { MEDIA_BUS_FMT_RGB565_1X16, 16, }, + { MEDIA_BUS_FMT_RGB666_1X18, 18, }, + { MEDIA_BUS_FMT_RGB888_1X24, 24, }, +}; + +static int tidss_set_vp_config(struct tidss_vp_config *cfg, u32 bus_format) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(tidss_bus_formats); i++) { + if (tidss_bus_formats[i].media_bus_fmt != bus_format) + continue; + + cfg->video_port_width = tidss_bus_formats[i].data_width; + return 0; + } + + /* If we did not find a match mode, fall back to sensible default */ + cfg->video_port_width = 24; + + return -EINVAL; +} + +static int tidss_crtc_atomic_check(struct drm_crtc *crtc, + struct drm_crtc_state *state) +{ + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + const struct drm_display_mode *mode = &state->adjusted_mode; + enum drm_mode_status ok; + struct videomode vm; + struct tidss_crtc_state *tcrtc_state = to_tidss_crtc_state(state); + + dev_dbg(ddev->dev, "%s\n", __func__); + + if (!state->enable) + return 0; + + tidss_mode_to_vm(mode, tcrtc_state->bus_flags, &vm); + + ok = tidss->dispc_ops->vp_timings_ok(tidss->dispc, tcrtc->hw_videoport, + &vm); + + if (ok == MODE_OK) + return 0; + + dev_err(ddev->dev, "%s: failed (%ux%u pclk %lu)\n", + __func__, vm.hactive, vm.vactive, vm.pixelclock); + + return -EINVAL; +} + +static void tidss_crtc_atomic_begin(struct drm_crtc *crtc, + struct drm_crtc_state *old_crtc_state) +{ + struct drm_device *ddev = crtc->dev; + + dev_dbg(ddev->dev, "%s\n", __func__); +} + +static void tidss_crtc_atomic_flush(struct drm_crtc *crtc, + struct drm_crtc_state *old_crtc_state) +{ + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + + dev_dbg(ddev->dev, "%s, crtc enabled %d, event %p\n", + __func__, tcrtc->enabled, crtc->state->event); + + /* Only flush the CRTC if it is currently enabled. */ + if (!tcrtc->enabled) + return; + + WARN_ON(tidss->dispc_ops->vp_go_busy(tidss->dispc, + tcrtc->hw_videoport)); + + // I think we always need the event to signal flip done + WARN_ON(!crtc->state->event); + + if (crtc->state->color_mgmt_changed) { + struct drm_color_lut *lut = NULL; + uint length = 0; + + if (crtc->state->gamma_lut) { + lut = (struct drm_color_lut *) + crtc->state->gamma_lut->data; + length = crtc->state->gamma_lut->length / + sizeof(*lut); + } + tidss->dispc_ops->vp_set_gamma(tidss->dispc, + tcrtc->hw_videoport, + lut, length); + } + + WARN_ON(drm_crtc_vblank_get(crtc) != 0); + + spin_lock_irq(&ddev->event_lock); + tidss->dispc_ops->vp_go(tidss->dispc, tcrtc->hw_videoport); + + if (crtc->state->event) { + tcrtc->event = crtc->state->event; + crtc->state->event = NULL; + } + + spin_unlock_irq(&ddev->event_lock); +} + +static void tidss_crtc_atomic_enable(struct drm_crtc *crtc, + struct drm_crtc_state *old_state) +{ + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + struct tidss_crtc_state *tcrtc_state = to_tidss_crtc_state(crtc->state); + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + const struct drm_display_mode *mode = &crtc->state->adjusted_mode; + struct videomode vm; + struct tidss_vp_config cfg; + int r; + + dev_dbg(ddev->dev, "%s, event %p\n", __func__, crtc->state->event); + + tidss->dispc_ops->runtime_get(tidss->dispc); + + tidss_mode_to_vm(mode, tcrtc_state->bus_flags, &vm); + + r = tidss->dispc_ops->vp_set_clk_rate(tidss->dispc, tcrtc->hw_videoport, + vm.pixelclock); + WARN_ON(r); + + r = tidss->dispc_ops->vp_enable_clk(tidss->dispc, tcrtc->hw_videoport); + WARN_ON(r); + + tidss->dispc_ops->vp_set_timings(tidss->dispc, tcrtc->hw_videoport, + &vm); + + if (tidss_set_vp_config(&cfg, tcrtc_state->bus_format)) + dev_warn(ddev->dev, + "%s: unsupported bus format 0x%x, using 18-bit dpi\n", + __func__, tcrtc_state->bus_format); + + tidss->dispc_ops->vp_set_lcd_config(tidss->dispc, tcrtc->hw_videoport, + &cfg); + + /* Turn vertical blanking interrupt reporting on. */ + drm_crtc_vblank_on(crtc); + + tcrtc->enabled = true; + + tidss->dispc_ops->vp_enable(tidss->dispc, tcrtc->hw_videoport, true); + + spin_lock_irq(&ddev->event_lock); + + if (crtc->state->event) { + drm_crtc_send_vblank_event(crtc, crtc->state->event); + crtc->state->event = NULL; + } + + spin_unlock_irq(&ddev->event_lock); +} + +static void tidss_crtc_atomic_disable(struct drm_crtc *crtc, + struct drm_crtc_state *old_state) +{ + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + + dev_dbg(ddev->dev, "%s, event %p\n", __func__, crtc->state->event); + + reinit_completion(&tcrtc->framedone_completion); + + tidss->dispc_ops->vp_enable(tidss->dispc, tcrtc->hw_videoport, false); + + if (!wait_for_completion_timeout(&tcrtc->framedone_completion, + msecs_to_jiffies(500))) + dev_err(tidss->dev, "Timeout waiting for framedone on crtc %d", + tcrtc->hw_videoport); + + spin_lock_irq(&ddev->event_lock); + if (crtc->state->event) { + drm_crtc_send_vblank_event(crtc, crtc->state->event); + crtc->state->event = NULL; + } + spin_unlock_irq(&ddev->event_lock); + + tcrtc->enabled = false; + + drm_crtc_vblank_off(crtc); + + tidss->dispc_ops->vp_disable_clk(tidss->dispc, tcrtc->hw_videoport); + + tidss->dispc_ops->runtime_put(tidss->dispc); + + spin_lock_irq(&crtc->dev->event_lock); + if (crtc->state->event) { + drm_crtc_send_vblank_event(crtc, crtc->state->event); + crtc->state->event = NULL; + } + spin_unlock_irq(&crtc->dev->event_lock); +} + +static +enum drm_mode_status tidss_crtc_mode_valid(struct drm_crtc *crtc, + const struct drm_display_mode *mode) +{ + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + struct videomode vm; + + tidss_mode_to_vm(mode, 0, &vm); + + return tidss->dispc_ops->vp_timings_ok(tidss->dispc, + tcrtc->hw_videoport, + &vm); +} + +static const struct drm_crtc_helper_funcs crtc_helper_funcs = { + .atomic_check = tidss_crtc_atomic_check, + .atomic_begin = tidss_crtc_atomic_begin, + .atomic_flush = tidss_crtc_atomic_flush, + .atomic_enable = tidss_crtc_atomic_enable, + .atomic_disable = tidss_crtc_atomic_disable, + + .mode_valid = tidss_crtc_mode_valid, +}; + +static void tidss_crtc_reset(struct drm_crtc *crtc) +{ + if (crtc->state) + __drm_atomic_helper_crtc_destroy_state(crtc->state); + + kfree(crtc->state); + crtc->state = kzalloc(sizeof(struct tidss_crtc_state), GFP_KERNEL); + + if (crtc->state) + crtc->state->crtc = crtc; +} + +static struct drm_crtc_state * +tidss_crtc_duplicate_state(struct drm_crtc *crtc) +{ + struct tidss_crtc_state *state, *current_state; + + if (WARN_ON(!crtc->state)) + return NULL; + + current_state = to_tidss_crtc_state(crtc->state); + + state = kmalloc(sizeof(*state), GFP_KERNEL); + if (!state) + return NULL; + + __drm_atomic_helper_crtc_duplicate_state(crtc, &state->base); + + return &state->base; +} + +static int tidss_crtc_enable_vblank(struct drm_crtc *crtc) +{ + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + + dev_dbg(ddev->dev, "%s\n", __func__); + + tidss->dispc_ops->runtime_get(tidss->dispc); + + tidss_irq_enable_vblank(crtc); + + return 0; +} + +static void tidss_crtc_disable_vblank(struct drm_crtc *crtc) +{ + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + + dev_dbg(ddev->dev, "%s\n", __func__); + + tidss_irq_disable_vblank(crtc); + + tidss->dispc_ops->runtime_put(tidss->dispc); +} + +static const struct drm_crtc_funcs crtc_funcs = { + .reset = tidss_crtc_reset, + .destroy = drm_crtc_cleanup, + .set_config = drm_atomic_helper_set_config, + .page_flip = drm_atomic_helper_page_flip, + .atomic_duplicate_state = tidss_crtc_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, + .enable_vblank = tidss_crtc_enable_vblank, + .disable_vblank = tidss_crtc_disable_vblank, +}; + +struct tidss_crtc *tidss_crtc_create(struct tidss_device *tidss, u32 hw_videoport, + struct drm_plane *primary, struct device_node *epnode) +{ + struct tidss_crtc *tcrtc; + struct drm_crtc *crtc; + int ret; + + tcrtc = devm_kzalloc(tidss->dev, sizeof(*tcrtc), GFP_KERNEL); + if (!tcrtc) + return ERR_PTR(-ENOMEM); + + tcrtc->hw_videoport = hw_videoport; + init_completion(&tcrtc->framedone_completion); + + crtc = &tcrtc->crtc; + + ret = drm_crtc_init_with_planes(tidss->ddev, crtc, primary, + NULL, &crtc_funcs, NULL); + if (ret < 0) + return ERR_PTR(ret); + + drm_crtc_helper_add(crtc, &crtc_helper_funcs); + + /* The dispc API adapts to what ever size we ask from in no + * matter what HW supports. X-server assumes 256 element gamma + * tables so lets use that. Size of HW gamma table can be + * extracted with dispc_vp_gamma_size(). If it returns 0 + * gamma table is not supprted. + */ + if (tidss->dispc_ops->vp_gamma_size(tidss->dispc, hw_videoport)) { + uint gamma_lut_size = 256; + + drm_crtc_enable_color_mgmt(crtc, 0, false, gamma_lut_size); + drm_mode_crtc_set_gamma_size(crtc, gamma_lut_size); + } + + return tcrtc; +} diff --git a/drivers/gpu/drm/tidss/tidss_crtc.h b/drivers/gpu/drm/tidss/tidss_crtc.h new file mode 100644 index 000000000000..013d7accebd1 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_crtc.h @@ -0,0 +1,50 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_CRTC_H__ +#define __TIDSS_CRTC_H__ + +#include <linux/wait.h> +#include <video/videomode.h> +#include <linux/completion.h> +#include <drm/drm_crtc.h> + +#include "tidss_dispc.h" + +#define to_tidss_crtc(c) container_of((c), struct tidss_crtc, crtc) + +struct tidss_crtc { + struct drm_crtc crtc; + + u32 hw_videoport; + + struct drm_pending_vblank_event *event; + + /* has crtc_atomic_enable been called? */ + bool enabled; + + struct completion framedone_completion; +}; + +#define to_tidss_crtc_state(x) container_of(x, struct tidss_crtc_state, base) + +struct tidss_crtc_state { + /* Must be first. */ + struct drm_crtc_state base; + + struct videomode vm; + u32 bus_format; + u32 bus_flags; +}; + +struct tidss_crtc *tidss_crtc_create(struct tidss_device *tidss, u32 hw_videoport, struct drm_plane *primary, struct device_node *epnode); + + +void tidss_crtc_vblank_irq(struct drm_crtc *crtc); +void tidss_crtc_framedone_irq(struct drm_crtc *crtc); +void tidss_crtc_error_irq(struct drm_crtc *crtc, u64 irqstatus); + +#endif diff --git a/drivers/gpu/drm/tidss/tidss_dispc.h b/drivers/gpu/drm/tidss/tidss_dispc.h new file mode 100644 index 000000000000..bc94e1bb094f --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_dispc.h @@ -0,0 +1,146 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_DISPC_H__ +#define __TIDSS_DISPC_H__ + +struct tidss_device; +struct dispc_device; +struct videomode; +struct drm_color_lut; + +#define DSS_MAX_CHANNELS 8 +#define DSS_MAX_PLANES 8 + +/* + * Based on the above 2 defines the bellow defines describe following + * u64 IRQ bits: + * + * bit group |dev |mrg0|mrg1|mrg2|mrg3|mrg4|mrg5|mrg6|mrg7| plane0-7 |<unused> | + * bit use |Dfou|FEOL|FEOL|FEOL|FEOL|FEOL|FEOL|FEOL|FEOL|UUUU|UUUU| | | | | | + * bit number|0-3 |4-7 |8-11| 12-35 | 36-43 | 44-63 | + * + * device bits: D = OCP error + * WB bits: f = frame done wb, o = wb buffer overflow, + * u = wb buffer uncomplete + * vp bits: F = frame done, E = vsync even, O = vsync odd, L = sync lost + * plane bits: U = fifo underflow + */ + +#define DSS_IRQ_DEVICE_OCP_ERR BIT_ULL(0) + +#define DSS_IRQ_DEVICE_FRAMEDONEWB BIT_ULL(1) +#define DSS_IRQ_DEVICE_WBBUFFEROVERFLOW BIT_ULL(2) +#define DSS_IRQ_DEVICE_WBUNCOMPLETEERROR BIT_ULL(3) +#define DSS_IRQ_DEVICE_WB_MASK GENMASK_ULL(3, 1) + +#define DSS_IRQ_VP_BIT_N(ch, bit) (4 + 4 * ch + bit) +#define DSS_IRQ_PLANE_BIT_N(plane, bit) \ + (DSS_IRQ_VP_BIT_N(DSS_MAX_CHANNELS, 0) + 1 * plane + bit) + +#define DSS_IRQ_VP_BIT(ch, bit) BIT_ULL(DSS_IRQ_VP_BIT_N(ch, bit)) +#define DSS_IRQ_PLANE_BIT(plane, bit) BIT_ULL(DSS_IRQ_PLANE_BIT_N(plane, bit)) + +#define DSS_IRQ_VP_MASK(ch) \ + GENMASK_ULL(DSS_IRQ_VP_BIT_N(ch, 3), DSS_IRQ_VP_BIT_N(ch, 0)) +#define DSS_IRQ_PLANE_MASK(plane) \ + GENMASK_ULL(DSS_IRQ_PLANE_BIT_N(plane, 0), DSS_IRQ_PLANE_BIT_N(plane, 0)) + +#define DSS_IRQ_VP_FRAME_DONE(ch) DSS_IRQ_VP_BIT(ch, 0) +#define DSS_IRQ_VP_VSYNC_EVEN(ch) DSS_IRQ_VP_BIT(ch, 1) +#define DSS_IRQ_VP_VSYNC_ODD(ch) DSS_IRQ_VP_BIT(ch, 2) +#define DSS_IRQ_VP_SYNC_LOST(ch) DSS_IRQ_VP_BIT(ch, 3) + +#define DSS_IRQ_PLANE_FIFO_UNDERFLOW(plane) DSS_IRQ_PLANE_BIT(plane, 0) + + +struct tidss_vp_info { + u32 default_color; +}; + +struct tidss_vp_config { + u32 video_port_width; +}; + +struct tidss_plane_info { + dma_addr_t paddr; + dma_addr_t p_uv_addr; /* for NV12 format */ + u16 fb_width; + u16 width; + u16 height; + u32 fourcc; + + u16 pos_x; + u16 pos_y; + u16 out_width; /* if 0, out_width == width */ + u16 out_height; /* if 0, out_height == height */ + u8 global_alpha; + u8 pre_mult_alpha; + u8 zorder; +}; + +struct dispc_ops { + u64 (*read_and_clear_irqstatus)(struct dispc_device *dispc); + void (*write_irqenable)(struct dispc_device *dispc, u64 enable); + + int (*runtime_get)(struct dispc_device *dispc); + void (*runtime_put)(struct dispc_device *dispc); + + int (*get_num_planes)(struct dispc_device *dispc); + int (*get_num_vps)(struct dispc_device *dispc); + + const char *(*plane_name)(struct dispc_device *dispc, + u32 hw_plane); + const char *(*vp_name)(struct dispc_device *dispc, + u32 hw_videoport); + + u32 (*get_memory_bandwidth_limit)(struct dispc_device *dispc); + + void (*vp_enable)(struct dispc_device *dispc, + u32 hw_videoport, bool enable); + bool (*vp_go_busy)(struct dispc_device *dispc, + u32 hw_videoport); + void (*vp_go)(struct dispc_device *dispc, u32 hw_videoport); + void (*vp_set_lcd_config)(struct dispc_device *dispc, + u32 hw_videoport, + const struct tidss_vp_config *config); + enum drm_mode_status (*vp_timings_ok)(struct dispc_device *dispc, + u32 hw_videoport, + const struct videomode *vm); + void (*vp_set_timings)(struct dispc_device *dispc, + u32 hw_videoport, + const struct videomode *vm); + void (*vp_setup)(struct dispc_device *dispc, u32 hw_videoport, + const struct tidss_vp_info *info); + u32 (*vp_gamma_size)(struct dispc_device *dispc, + u32 hw_videoport); + void (*vp_set_gamma)(struct dispc_device *dispc, + u32 hw_videoport, + const struct drm_color_lut *lut, + unsigned int length); + + int (*plane_enable)(struct dispc_device *dispc, u32 hw_plane, + bool enable); + int (*plane_setup)(struct dispc_device *dispc, u32 hw_plane, + const struct tidss_plane_info *oi, + bool mem_to_mem, u32 hw_videoport); + + int (*vp_set_clk_rate)(struct dispc_device *dispc, + u32 hw_videoport, unsigned long rate); + int (*vp_enable_clk)(struct dispc_device *dispc, u32 hw_videoport); + void (*vp_disable_clk)(struct dispc_device *dispc, u32 hw_videoport); + + int (*runtime_suspend)(struct dispc_device *dispc); + int (*runtime_resume)(struct dispc_device *dispc); + + void (*remove)(struct dispc_device *dispc); + + int (*modeset_init)(struct dispc_device *dispc); +}; + +int dispc6_init(struct tidss_device *tidss); + +#endif diff --git a/drivers/gpu/drm/tidss/tidss_dispc6.c b/drivers/gpu/drm/tidss/tidss_dispc6.c new file mode 100644 index 000000000000..d745c92b6879 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_dispc6.c @@ -0,0 +1,1397 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#include <linux/clk.h> +#include <linux/component.h> +#include <linux/delay.h> +#include <linux/export.h> +#include <linux/interrupt.h> +#include <linux/io.h> +#include <linux/kernel.h> +#include <linux/of.h> +#include <linux/of_graph.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> +#include <video/videomode.h> + +#include <drm/drm_fourcc.h> +#include <drm/drm_of.h> +#include <drm/drm_panel.h> + +#include "tidss_crtc.h" +#include "tidss_drv.h" +#include "tidss_encoder.h" +#include "tidss_plane.h" + +#include "tidss_dispc6.h" +#include "tidss_dispc6_regs.h" + +/* + * TRM gives bitfields as start:end, where start is the higher bit + * number. For example 7:0 + */ + +#define FLD_MASK(start, end) (((1 << ((start) - (end) + 1)) - 1) << (end)) +#define FLD_VAL(val, start, end) (((val) << (end)) & FLD_MASK(start, end)) +#define FLD_GET(val, start, end) (((val) & FLD_MASK(start, end)) >> (end)) +#define FLD_MOD(orig, val, start, end) \ + (((orig) & ~FLD_MASK(start, end)) | FLD_VAL(val, start, end)) + + +#define REG_GET(dispc, idx, start, end) \ + FLD_GET(dispc6_read(dispc, idx), start, end) + +#define REG_FLD_MOD(dispc, idx, val, start, end) \ + dispc6_write(dispc, idx, FLD_MOD(dispc6_read(dispc, idx), val, start, end)) + +#define VID_REG_GET(dispc, plane, idx, start, end) \ + FLD_GET(dispc6_vid_read(dispc, plane, idx), start, end) + +#define VID_REG_FLD_MOD(dispc, plane, idx, val, start, end) \ + dispc6_vid_write(dispc, plane, idx, FLD_MOD(dispc6_vid_read(dispc, plane, idx), val, start, end)) + + +#define VP_REG_GET(dispc, vp, idx, start, end) \ + FLD_GET(dispc6_vp_read(dispc, vp, idx), start, end) + +#define VP_REG_FLD_MOD(dispc, vp, idx, val, start, end) \ + dispc6_vp_write(dispc, vp, idx, FLD_MOD(dispc6_vp_read(dispc, vp, idx), val, start, end)) + +struct dispc_features { + /* XXX should these come from the .dts? Min pclk is not feature of DSS IP */ + unsigned long min_pclk; + unsigned long max_pclk; +}; + +/* Note: 9MHz is a special allowed case, and is handled separately in the code */ +static const struct dispc_features k2g_dispc_feats = { + .min_pclk = 43750000, + .max_pclk = 150000000, +}; + +static const struct of_device_id dispc6_of_match[] = { + { .compatible = "ti,k2g-dss", .data = &k2g_dispc_feats, }, + {}, +}; + +struct dispc_device { + struct device *dev; + + void __iomem *base_cfg; + void __iomem *base_common; + void __iomem *base_vid1; + void __iomem *base_ovr1; + void __iomem *base_vp1; + + const struct dispc_features *feat; + + struct clk *fclk; + struct clk *vp_clk; + + bool is_enabled; + + u32 gamma_table[256]; + + struct tidss_device *tidss; +}; + +static void dispc6_write(struct dispc_device *dispc, u16 reg, u32 val) +{ + iowrite32(val, dispc->base_common + reg); +} + +static u32 dispc6_read(struct dispc_device *dispc, u16 reg) +{ + return ioread32(dispc->base_common + reg); +} + +static void dispc6_vid_write(struct dispc_device *dispc, + u32 hw_plane, u16 reg, u32 val) +{ + void __iomem *base = dispc->base_vid1; + + iowrite32(val, base + reg); +} + +static u32 dispc6_vid_read(struct dispc_device *dispc, + u32 hw_plane, u16 reg) +{ + void __iomem *base = dispc->base_vid1; + + return ioread32(base + reg); +} + +static void dispc6_ovr_write(struct dispc_device *dispc, + u32 hw_videoport, u16 reg, u32 val) +{ + void __iomem *base = dispc->base_ovr1; + + iowrite32(val, base + reg); +} + +__maybe_unused +static u32 dispc6_ovr_read(struct dispc_device *dispc, + u32 hw_videoport, u16 reg) +{ + void __iomem *base = dispc->base_ovr1; + + return ioread32(base + reg); +} + +static void dispc6_vp_write(struct dispc_device *dispc, + u32 hw_videoport, u16 reg, u32 val) +{ + void __iomem *base = dispc->base_vp1; + + iowrite32(val, base + reg); +} + +static u32 dispc6_vp_read(struct dispc_device *dispc, + u32 hw_videoport, u16 reg) +{ + void __iomem *base = dispc->base_vp1; + + return ioread32(base + reg); +} + +static int dispc6_runtime_get(struct dispc_device *dispc) +{ + int r; + + dev_dbg(dispc->dev, "dispc_runtime_get\n"); + + r = pm_runtime_get_sync(dispc->dev); + WARN_ON(r < 0); + return r < 0 ? r : 0; +} + +static void dispc6_runtime_put(struct dispc_device *dispc) +{ + int r; + + dev_dbg(dispc->dev, "dispc_runtime_put\n"); + + r = pm_runtime_put_sync(dispc->dev); + WARN_ON(r < 0); +} + +static u64 dispc6_vp_irq_from_raw(u32 stat) +{ + u32 vp = 0; + u64 vp_stat = 0; + + if (stat & BIT(0)) + vp_stat |= DSS_IRQ_VP_FRAME_DONE(vp); + if (stat & BIT(1)) + vp_stat |= DSS_IRQ_VP_VSYNC_EVEN(vp); + if (stat & BIT(2)) + vp_stat |= DSS_IRQ_VP_VSYNC_ODD(vp); + if (stat & BIT(4)) + vp_stat |= DSS_IRQ_VP_SYNC_LOST(vp); + + return vp_stat; +} + +static u32 dispc6_vp_irq_to_raw(u64 vpstat) +{ + u32 vp = 0; + u32 stat = 0; + + if (vpstat & DSS_IRQ_VP_FRAME_DONE(vp)) + stat |= BIT(0); + if (vpstat & DSS_IRQ_VP_VSYNC_EVEN(vp)) + stat |= BIT(1); + if (vpstat & DSS_IRQ_VP_VSYNC_ODD(vp)) + stat |= BIT(2); + if (vpstat & DSS_IRQ_VP_SYNC_LOST(vp)) + stat |= BIT(4); + + return stat; +} + +static u64 dispc6_vid_irq_from_raw(u32 stat) +{ + uint plane = 0; + u64 vid_stat = 0; + + if (stat & BIT(0)) + vid_stat |= DSS_IRQ_PLANE_FIFO_UNDERFLOW(plane); + + return vid_stat; +} + +static u32 dispc6_vid_irq_to_raw(u64 vidstat) +{ + uint plane = 0; + u32 stat = 0; + + if (vidstat & DSS_IRQ_PLANE_FIFO_UNDERFLOW(plane)) + stat |= BIT(0); + + return stat; +} + + +static u64 dispc6_vp_read_irqstatus(struct dispc_device *dispc, + u32 hw_videoport) +{ + u32 stat = dispc6_vp_read(dispc, hw_videoport, DISPC_VP_IRQSTATUS); + + return dispc6_vp_irq_from_raw(stat); +} + +static void dispc6_vp_write_irqstatus(struct dispc_device *dispc, + u32 hw_videoport, + u64 vpstat) +{ + u32 stat = dispc6_vp_irq_to_raw(vpstat); + + dispc6_vp_write(dispc, hw_videoport, DISPC_VP_IRQSTATUS, stat); +} + +static u64 dispc6_vid_read_irqstatus(struct dispc_device *dispc, + u32 hw_plane) +{ + u32 stat = dispc6_vid_read(dispc, hw_plane, DISPC_VID_IRQSTATUS); + + return dispc6_vid_irq_from_raw(stat); +} + +static void dispc6_vid_write_irqstatus(struct dispc_device *dispc, + u32 hw_plane, + u64 vidstat) +{ + u32 stat = dispc6_vid_irq_to_raw(vidstat); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_IRQSTATUS, stat); +} + + +static u64 dispc6_vp_read_irqenable(struct dispc_device *dispc, + u32 hw_videoport) +{ + u32 stat = dispc6_vp_read(dispc, hw_videoport, DISPC_VP_IRQENABLE); + + return dispc6_vp_irq_from_raw(stat); +} + +static void dispc6_vp_write_irqenable(struct dispc_device *dispc, + u32 hw_videoport, + u64 vpstat) +{ + u32 stat = dispc6_vp_irq_to_raw(vpstat); + + dispc6_vp_write(dispc, hw_videoport, DISPC_VP_IRQENABLE, stat); +} + +static u64 dispc6_vid_read_irqenable(struct dispc_device *dispc, + u32 hw_plane) +{ + u32 stat = dispc6_vid_read(dispc, hw_plane, DISPC_VID_IRQENABLE); + + return dispc6_vid_irq_from_raw(stat); +} + +static void dispc6_vid_write_irqenable(struct dispc_device *dispc, + u32 hw_plane, + u64 vidstat) +{ + u32 stat = dispc6_vid_irq_to_raw(vidstat); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_IRQENABLE, stat); +} + + +static void dispc6_clear_irqstatus(struct dispc_device *dispc, u64 mask) +{ + dispc6_vp_write_irqstatus(dispc, 0, mask); + dispc6_vid_write_irqstatus(dispc, 0, mask); +} + +static u64 dispc6_read_and_clear_irqstatus(struct dispc_device *dispc) +{ + u64 stat = 0; + + // always clear the top level irqstatus + dispc6_write(dispc, DISPC_IRQSTATUS, + dispc6_read(dispc, DISPC_IRQSTATUS)); + + stat |= dispc6_vp_read_irqstatus(dispc, 0); + stat |= dispc6_vid_read_irqstatus(dispc, 0); + + dispc6_clear_irqstatus(dispc, stat); + + return stat; +} + +static u64 dispc6_read_irqenable(struct dispc_device *dispc) +{ + u64 stat = 0; + + stat |= dispc6_vp_read_irqenable(dispc, 0); + stat |= dispc6_vid_read_irqenable(dispc, 0); + + return stat; +} + +static void dispc6_write_irqenable(struct dispc_device *dispc, u64 mask) +{ + u64 old_mask = dispc6_read_irqenable(dispc); + + /* clear the irqstatus for newly enabled irqs */ + dispc6_clear_irqstatus(dispc, (mask ^ old_mask) & mask); + + dispc6_vp_write_irqenable(dispc, 0, mask); + dispc6_vid_write_irqenable(dispc, 0, mask); + + dispc6_write(dispc, DISPC_IRQENABLE_SET, (1 << 0) | (1 << 7)); + + /* flush posted write */ + dispc6_read_irqenable(dispc); +} + + +static bool dispc6_vp_go_busy(struct dispc_device *dispc, + u32 hw_videoport) +{ + return VP_REG_GET(dispc, hw_videoport, DISPC_VP_CONTROL, 5, 5); +} + +static void dispc6_vp_go(struct dispc_device *dispc, + u32 hw_videoport) +{ + VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONTROL, 1, 5, 5); +} + +static void dispc6_vp_enable(struct dispc_device *dispc, + u32 hw_videoport, bool enable) +{ + VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONTROL, !!enable, 0, 0); +} + +static u16 c8_to_c12(u8 c8) +{ + u16 c12; + + c12 = c8 << 4; + + /* Replication logic: Copy c8 4 MSB to 4 LSB for full scale c12 */ + c12 = c8 >> 4; + + return c12; +} + +static u64 argb8888_to_argb12121212(u32 argb8888) +{ + u8 a, r, g, b; + u64 v; + + a = (argb8888 >> 24) & 0xff; + r = (argb8888 >> 16) & 0xff; + g = (argb8888 >> 8) & 0xff; + b = (argb8888 >> 0) & 0xff; + + v = ((u64)c8_to_c12(a) << 36) | ((u64)c8_to_c12(r) << 24) | + ((u64)c8_to_c12(g) << 12) | (u64)c8_to_c12(b); + + return v; +} + +static void dispc6_vp_setup(struct dispc_device *dispc, + u32 hw_videoport, + const struct tidss_vp_info *info) +{ + u64 v; + + v = argb8888_to_argb12121212(info->default_color); + + dispc6_ovr_write(dispc, 0, DISPC_OVR_DEFAULT_COLOR, v & 0xffffffff); + dispc6_ovr_write(dispc, 0, DISPC_OVR_DEFAULT_COLOR2, + (v >> 32) & 0xffff); +} + +static void dispc6_set_num_datalines(struct dispc_device *dispc, + u32 hw_videoport, int num_lines) +{ + int v; + + switch (num_lines) { + case 12: + v = 0; break; + case 16: + v = 1; break; + case 18: + v = 2; break; + case 24: + v = 3; break; + case 30: + v = 4; break; + case 36: + v = 5; break; + default: + WARN_ON(1); + v = 3; + break; + } + + VP_REG_FLD_MOD(dispc, hw_videoport, DISPC_VP_CONTROL, v, 10, 8); +} + +static void dispc6_vp_set_lcd_config(struct dispc_device *dispc, + u32 hw_videoport, + const struct tidss_vp_config *config) +{ + dispc6_set_num_datalines(dispc, hw_videoport, config->video_port_width); +} + +static enum drm_mode_status dispc6_lcd_timings_ok(int hsw, int hfp, int hbp, + int vsw, int vfp, int vbp) +{ + if (hsw < 1 || hsw > 256 || + hfp < 1 || hfp > 4096 || + hbp < 1 || hbp > 4096) + return MODE_BAD_HVALUE; + if (vsw < 1 || vsw > 256 || + vfp < 0 || vfp > 4095 || + vbp < 0 || vbp > 4095) + return MODE_BAD_VVALUE; + return MODE_OK; +} + +static +enum drm_mode_status dispc6_vp_timings_ok(struct dispc_device *dispc, + u32 hw_videoport, + const struct videomode *vm) +{ + if (vm->pixelclock < dispc->feat->min_pclk && vm->pixelclock != 9000000) + return MODE_CLOCK_LOW; + + if (vm->pixelclock > dispc->feat->max_pclk) + return MODE_CLOCK_HIGH; + + if (vm->hactive > 4096) + return MODE_BAD; + + if (vm->vactive > 4096) + return MODE_BAD; + + /* TODO: add interlace support */ + if (vm->flags & DISPLAY_FLAGS_INTERLACED) + return MODE_NO_INTERLACE; + + return dispc6_lcd_timings_ok(vm->hsync_len, + vm->hfront_porch, vm->hback_porch, + vm->vsync_len, + vm->vfront_porch, vm->vback_porch); +} + +static void dispc6_vp_set_timings(struct dispc_device *dispc, + u32 hw_videoport, + const struct videomode *vm) +{ + bool align, onoff, rf, ieo, ipc, ihs, ivs; + + dispc6_vp_write(dispc, hw_videoport, DISPC_VP_TIMING_H, + FLD_VAL(vm->hsync_len - 1, 7, 0) | + FLD_VAL(vm->hfront_porch - 1, 19, 8) | + FLD_VAL(vm->hback_porch - 1, 31, 20)); + + dispc6_vp_write(dispc, hw_videoport, DISPC_VP_TIMING_V, + FLD_VAL(vm->vsync_len - 1, 7, 0) | + FLD_VAL(vm->vfront_porch, 19, 8) | + FLD_VAL(vm->vback_porch, 31, 20)); + + if (vm->flags & DISPLAY_FLAGS_VSYNC_HIGH) + ivs = false; + else + ivs = true; + + if (vm->flags & DISPLAY_FLAGS_HSYNC_HIGH) + ihs = false; + else + ihs = true; + + if (vm->flags & DISPLAY_FLAGS_DE_HIGH) + ieo = false; + else + ieo = true; + + if (vm->flags & DISPLAY_FLAGS_PIXDATA_POSEDGE) + ipc = false; + else + ipc = true; + + /* always use the 'rf' setting */ + onoff = true; + + if (vm->flags & DISPLAY_FLAGS_SYNC_POSEDGE) + rf = true; + else + rf = false; + + /* always use aligned syncs */ + align = true; + + dispc6_vp_write(dispc, hw_videoport, DISPC_VP_POL_FREQ, + FLD_VAL(align, 18, 18) | + FLD_VAL(onoff, 17, 17) | + FLD_VAL(rf, 16, 16) | + FLD_VAL(ieo, 15, 15) | + FLD_VAL(ipc, 14, 14) | + FLD_VAL(ihs, 13, 13) | + FLD_VAL(ivs, 12, 12)); + + dispc6_vp_write(dispc, hw_videoport, DISPC_VP_SIZE_SCREEN, + FLD_VAL(vm->hactive - 1, 11, 0) | + FLD_VAL(vm->vactive - 1, 27, 16)); +} + +static int dispc6_vp_enable_clk(struct dispc_device *dispc, u32 hw_videoport) +{ + return clk_prepare_enable(dispc->vp_clk); +} + +static void dispc6_vp_disable_clk(struct dispc_device *dispc, + u32 hw_videoport) +{ + clk_disable_unprepare(dispc->vp_clk); +} + +static int dispc6_vp_set_clk_rate(struct dispc_device *dispc, + u32 hw_videoport, unsigned long rate) +{ + int r; + unsigned long new_rate; + + r = clk_set_rate(dispc->vp_clk, rate); + if (r) { + dev_err(dispc->dev, "Failed to set vp clk rate to %lu\n", + rate); + return r; + } + + new_rate = clk_get_rate(dispc->vp_clk); + + if (rate != new_rate) + dev_warn(dispc->dev, + "Failed to get exact pix clock %lu != %lu\n", + rate, new_rate); + + dev_dbg(dispc->dev, "New VP rate %lu Hz (requested %lu Hz)\n", + clk_get_rate(dispc->vp_clk), rate); + + return 0; +} + +/* CSC */ + +struct color_conv_coef { + int ry, rcb, rcr; + int gy, gcb, gcr; + int by, bcb, bcr; + int roffset, goffset, boffset; + bool full_range; +}; + +static void dispc6_vid_write_color_conv_coefs(struct dispc_device *dispc, + u32 hw_plane, + const struct color_conv_coef *ct) +{ +#define CVAL(x, y) (FLD_VAL(x, 26, 16) | FLD_VAL(y, 10, 0)) + + dispc6_vid_write(dispc, hw_plane, + DISPC_VID_CONV_COEF(0), CVAL(ct->rcr, ct->ry)); + dispc6_vid_write(dispc, hw_plane, + DISPC_VID_CONV_COEF(1), CVAL(ct->gy, ct->rcb)); + dispc6_vid_write(dispc, hw_plane, + DISPC_VID_CONV_COEF(2), CVAL(ct->gcb, ct->gcr)); + dispc6_vid_write(dispc, hw_plane, + DISPC_VID_CONV_COEF(3), CVAL(ct->bcr, ct->by)); + dispc6_vid_write(dispc, hw_plane, + DISPC_VID_CONV_COEF(4), CVAL(0, ct->bcb)); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_CONV_COEF(5), + FLD_VAL(ct->roffset, 15, 3) | + FLD_VAL(ct->goffset, 31, 19)); + dispc6_vid_write(dispc, hw_plane, DISPC_VID_CONV_COEF(6), + FLD_VAL(ct->boffset, 15, 3)); + + VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, + ct->full_range, 11, 11); + +#undef CVAL +} + +static void dispc6_vid_csc_setup(struct dispc_device *dispc) +{ + /* YUV -> RGB, ITU-R BT.601, full range */ + const struct color_conv_coef coefs_yuv2rgb_bt601_full = { + 256, 0, 358, + 256, -88, -182, + 256, 452, 0, + 0, -2048, -2048, + true, + }; + + dispc6_vid_write_color_conv_coefs(dispc, 0, &coefs_yuv2rgb_bt601_full); +} + +static void dispc6_vid_csc_enable(struct dispc_device *dispc, + u32 hw_plane, bool enable) +{ + VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, !!enable, 9, 9); +} + +/* SCALER */ + +static u32 dispc6_calc_fir_inc(u32 in, u32 out) +{ + return (u32)div_u64(0x200000ull * in, out); +} + +struct dispc6_vid_fir_coefs { + s16 c2[16]; + s16 c1[16]; + u16 c0[9]; +}; + +static const struct dispc6_vid_fir_coefs dispc6_fir_coefs_null = { + .c2 = { 0 }, + .c1 = { 0 }, + .c0 = { 512, 512, 512, 512, 512, 512, 512, 512, 256, }, +}; + +/* M=8, Upscale x >= 1 */ +static const struct dispc6_vid_fir_coefs dispc6_fir_coefs_m8 = { + .c2 = { 0, -4, -8, -16, -24, -32, -40, -48, 0, 2, 4, 6, 8, 6, 4, 2, }, + .c1 = { 0, 28, 56, 94, 132, 176, 220, 266, -56, -60, -64, -62, -60, -50, -40, -20, }, + .c0 = { 512, 506, 500, 478, 456, 424, 392, 352, 312, }, +}; + +/* 5-tap, M=22, Downscale Ratio 2.5 < x < 3 */ +static const struct dispc6_vid_fir_coefs dispc6_fir_coefs_m22_5tap = { + .c2 = { 16, 20, 24, 30, 36, 42, 48, 56, 0, 0, 0, 2, 4, 8, 12, 14, }, + .c1 = { 132, 140, 148, 156, 164, 172, 180, 186, 64, 72, 80, 88, 96, 104, 112, 122, }, + .c0 = { 216, 216, 216, 214, 212, 208, 204, 198, 192, }, +}; + +/* 3-tap, M=22, Downscale Ratio 2.5 < x < 3 */ +static const struct dispc6_vid_fir_coefs dispc6_fir_coefs_m22_3tap = { + .c1 = { 100, 118, 136, 156, 176, 196, 216, 236, 0, 10, 20, 30, 40, 54, 68, 84, }, + .c0 = { 312, 310, 308, 302, 296, 286, 276, 266, 256, }, +}; + +enum dispc6_vid_fir_coef_set { + DISPC6_VID_FIR_COEF_HORIZ, + DISPC6_VID_FIR_COEF_HORIZ_UV, + DISPC6_VID_FIR_COEF_VERT, + DISPC6_VID_FIR_COEF_VERT_UV, +}; + +static void dispc6_vid_write_fir_coefs(struct dispc_device *dispc, + u32 hw_plane, + enum dispc6_vid_fir_coef_set coef_set, + const struct dispc6_vid_fir_coefs *coefs) +{ + static const u16 c0_regs[] = { + [DISPC6_VID_FIR_COEF_HORIZ] = DISPC_VID_FIR_COEFS_H0, + [DISPC6_VID_FIR_COEF_HORIZ_UV] = DISPC_VID_FIR_COEFS_H0_C, + [DISPC6_VID_FIR_COEF_VERT] = DISPC_VID_FIR_COEFS_V0, + [DISPC6_VID_FIR_COEF_VERT_UV] = DISPC_VID_FIR_COEFS_V0_C, + }; + + static const u16 c12_regs[] = { + [DISPC6_VID_FIR_COEF_HORIZ] = DISPC_VID_FIR_COEFS_H12, + [DISPC6_VID_FIR_COEF_HORIZ_UV] = DISPC_VID_FIR_COEFS_H12_C, + [DISPC6_VID_FIR_COEF_VERT] = DISPC_VID_FIR_COEFS_V12, + [DISPC6_VID_FIR_COEF_VERT_UV] = DISPC_VID_FIR_COEFS_V12_C, + }; + + const u16 c0_base = c0_regs[coef_set]; + const u16 c12_base = c12_regs[coef_set]; + int phase; + + for (phase = 0; phase <= 8; ++phase) { + u16 reg = c0_base + phase * 4; + u16 c0 = coefs->c0[phase]; + + dispc6_vid_write(dispc, hw_plane, reg, c0); + } + + for (phase = 0; phase <= 15; ++phase) { + u16 reg = c12_base + phase * 4; + s16 c1, c2; + u32 c12; + + c1 = coefs->c1[phase]; + c2 = coefs->c2[phase]; + c12 = FLD_VAL(c1, 19, 10) | FLD_VAL(c2, 29, 20); + + dispc6_vid_write(dispc, hw_plane, reg, c12); + } +} + +static void dispc6_vid_write_scale_coefs(struct dispc_device *dispc, + u32 hw_plane) +{ + dispc6_vid_write_fir_coefs(dispc, hw_plane, DISPC6_VID_FIR_COEF_HORIZ, + &dispc6_fir_coefs_null); + dispc6_vid_write_fir_coefs(dispc, hw_plane, DISPC6_VID_FIR_COEF_HORIZ_UV, + &dispc6_fir_coefs_null); + dispc6_vid_write_fir_coefs(dispc, hw_plane, DISPC6_VID_FIR_COEF_VERT, + &dispc6_fir_coefs_null); + dispc6_vid_write_fir_coefs(dispc, hw_plane, DISPC6_VID_FIR_COEF_VERT_UV, + &dispc6_fir_coefs_null); +} + +static void dispc6_vid_set_scaling(struct dispc_device *dispc, + u32 hw_plane, + u32 orig_width, u32 orig_height, + u32 out_width, u32 out_height, + u32 fourcc) +{ + u32 in_w, in_h, in_w_uv, in_h_uv; + u32 fir_hinc, fir_vinc, fir_hinc_uv, fir_vinc_uv; + bool scale_x, scale_y; + bool five_taps = false; /* XXX always 3-tap for now */ + + in_w = in_w_uv = orig_width; + in_h = in_h_uv = orig_height; + + switch (fourcc) { + case DRM_FORMAT_NV12: + /* UV is subsampled by 2 horizontally and vertically */ + in_h_uv >>= 1; + in_w_uv >>= 1; + break; + + case DRM_FORMAT_YUYV: + case DRM_FORMAT_UYVY: + /* UV is subsampled by 2 horizontally */ + in_w_uv >>= 1; + break; + + default: + break; + } + + scale_x = in_w != out_width || in_w_uv != out_width; + scale_y = in_h != out_height || in_h_uv != out_height; + + /* HORIZONTAL RESIZE ENABLE */ + VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, scale_x, 7, 7); + + /* VERTICAL RESIZE ENABLE */ + VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, scale_y, 8, 8); + + /* Skip the rest if no scaling is used */ + if (!scale_x && !scale_y) + return; + + /* VERTICAL 5-TAPS */ + VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, five_taps, 21, 21); + + /* FIR INC */ + + fir_hinc = dispc6_calc_fir_inc(in_w, out_width); + fir_vinc = dispc6_calc_fir_inc(in_h, out_height); + fir_hinc_uv = dispc6_calc_fir_inc(in_w_uv, out_width); + fir_vinc_uv = dispc6_calc_fir_inc(in_h_uv, out_height); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_FIRH, fir_hinc); + dispc6_vid_write(dispc, hw_plane, DISPC_VID_FIRV, fir_vinc); + dispc6_vid_write(dispc, hw_plane, DISPC_VID_FIRH2, fir_hinc_uv); + dispc6_vid_write(dispc, hw_plane, DISPC_VID_FIRV2, fir_vinc_uv); + + dispc6_vid_write_scale_coefs(dispc, hw_plane); +} + +/* OTHER */ + +static const struct { + u32 fourcc; + u8 dss_code; + u8 bytespp; +} dispc6_color_formats[] = { + { DRM_FORMAT_ARGB4444, 0x0, 2, }, + { DRM_FORMAT_ABGR4444, 0x1, 2, }, + { DRM_FORMAT_RGBA4444, 0x2, 2, }, + + { DRM_FORMAT_RGB565, 0x3, 2, }, + { DRM_FORMAT_BGR565, 0x4, 2, }, + + { DRM_FORMAT_ARGB1555, 0x5, 2, }, + { DRM_FORMAT_ABGR1555, 0x6, 2, }, + + { DRM_FORMAT_ARGB8888, 0x7, 4, }, + { DRM_FORMAT_ABGR8888, 0x8, 4, }, + { DRM_FORMAT_RGBA8888, 0x9, 4, }, + { DRM_FORMAT_BGRA8888, 0xa, 4, }, + + { DRM_FORMAT_XRGB8888, 0x27, 4, }, + { DRM_FORMAT_XBGR8888, 0x28, 4, }, + { DRM_FORMAT_RGBX8888, 0x29, 4, }, + { DRM_FORMAT_BGRX8888, 0x2a, 4, }, + + { DRM_FORMAT_YUYV, 0x3e, 2, }, + { DRM_FORMAT_UYVY, 0x3f, 2, }, + + { DRM_FORMAT_NV12, 0x3d, 2, }, +}; + +static bool dispc6_fourcc_is_yuv(u32 fourcc) +{ + switch (fourcc) { + case DRM_FORMAT_YUYV: + case DRM_FORMAT_UYVY: + case DRM_FORMAT_NV12: + return true; + default: + return false; + } +} + +static void dispc6_plane_set_pixel_format(struct dispc_device *dispc, + u32 hw_plane, u32 fourcc) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(dispc6_color_formats); ++i) { + if (dispc6_color_formats[i].fourcc == fourcc) { + VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, + dispc6_color_formats[i].dss_code, + 6, 1); + return; + } + } + + WARN_ON(1); +} + +static int dispc6_fourcc_to_bytespp(u32 fourcc) +{ + int i; + + for (i = 0; i < ARRAY_SIZE(dispc6_color_formats); ++i) { + if (dispc6_color_formats[i].fourcc == fourcc) + return dispc6_color_formats[i].bytespp; + } + + WARN_ON(1); + return 4; +} + +static s32 pixinc(int pixels, u8 ps) +{ + if (pixels == 1) + return 1; + else if (pixels > 1) + return 1 + (pixels - 1) * ps; + else if (pixels < 0) + return 1 - (-pixels + 1) * ps; + + WARN_ON(1); + return 0; +} + +static int dispc6_plane_setup(struct dispc_device *dispc, u32 hw_plane, + const struct tidss_plane_info *oi, + bool mem_to_mem, u32 hw_videoport) +{ + u32 fourcc = oi->fourcc; + int bytespp = dispc6_fourcc_to_bytespp(fourcc); + + dispc6_plane_set_pixel_format(dispc, hw_plane, fourcc); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_BA_0, oi->paddr); + dispc6_vid_write(dispc, hw_plane, DISPC_VID_BA_1, oi->paddr); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_BA_UV_0, oi->p_uv_addr); + dispc6_vid_write(dispc, hw_plane, DISPC_VID_BA_UV_1, oi->p_uv_addr); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_PICTURE_SIZE, + (oi->width - 1) | ((oi->height - 1) << 16)); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_PIXEL_INC, + pixinc(1, bytespp)); + dispc6_vid_write(dispc, hw_plane, DISPC_VID_ROW_INC, + pixinc(1 + oi->fb_width - oi->width, bytespp)); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_POSITION, + oi->pos_x | (oi->pos_y << 16)); + + dispc6_vid_write(dispc, hw_plane, DISPC_VID_SIZE, + (oi->out_width - 1) | ((oi->out_height - 1) << 16)); + + dispc6_vid_set_scaling(dispc, hw_plane, + oi->width, oi->height, + oi->out_width, oi->out_height, + fourcc); + + /* enable YUV->RGB color conversion */ + if (dispc6_fourcc_is_yuv(fourcc)) + dispc6_vid_csc_enable(dispc, hw_plane, true); + else + dispc6_vid_csc_enable(dispc, hw_plane, false); + + /* hw_videoport */ + VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, 0, 16, 14); + + return 0; +} + +static int dispc6_plane_enable(struct dispc_device *dispc, + u32 hw_plane, bool enable) +{ + VID_REG_FLD_MOD(dispc, hw_plane, DISPC_VID_ATTRIBUTES, !!enable, 0, 0); + return 0; +} + +static u32 dispc6_vid_get_fifo_size(struct dispc_device *dispc, + u32 hw_plane) +{ + const u32 unit_size = 16; /* 128-bits */ + + return VID_REG_GET(dispc, hw_plane, DISPC_VID_BUF_SIZE_STATUS, 15, 0) * + unit_size; +} + +static void dispc6_vid_set_mflag_threshold(struct dispc_device *dispc, + u32 hw_plane, + u32 low, u32 high) +{ + dispc6_vid_write(dispc, hw_plane, DISPC_VID_MFLAG_THRESHOLD, + FLD_VAL(high, 31, 16) | FLD_VAL(low, 15, 0)); +} + +static void dispc6_mflag_setup(struct dispc_device *dispc) +{ + u32 hw_plane = 0; + const u32 unit_size = 16; /* 128-bits */ + u32 size = dispc6_vid_get_fifo_size(dispc, hw_plane); + u32 low, high; + + /* MFLAG_CTRL */ + REG_FLD_MOD(dispc, DISPC_GLOBAL_MFLAG_ATTRIBUTE, 1, 1, 0); + /* MFLAG_START */ + REG_FLD_MOD(dispc, DISPC_GLOBAL_MFLAG_ATTRIBUTE, 0, 2, 2); + + /* + * Simulation team suggests below thesholds: + * HT = fifosize * 5 / 8; + * LT = fifosize * 4 / 8; + */ + + low = size * 4 / 8 / unit_size; + high = size * 5 / 8 / unit_size; + + dispc6_vid_set_mflag_threshold(dispc, hw_plane, low, high); +} + +static void dispc6_initial_config(struct dispc_device *dispc) +{ + dispc6_vid_csc_setup(dispc); + dispc6_mflag_setup(dispc); + + /* Enable the gamma Shadow bit-field */ + VP_REG_FLD_MOD(dispc, 0, DISPC_VP_CONFIG, 1, 2, 2); +} + +static int dispc6_init_features(struct dispc_device *dispc) +{ + const struct of_device_id *match; + + match = of_match_node(dispc6_of_match, dispc->dev->of_node); + if (!match) { + dev_err(dispc->dev, "Unsupported DISPC version\n"); + return -ENODEV; + } + + dispc->feat = match->data; + + return 0; +} + +static int dispc6_get_num_planes(struct dispc_device *dispc) +{ + return 1; +} + +static int dispc6_get_num_vps(struct dispc_device *dispc) +{ + return 1; +} + +static u32 dispc6_vp_gamma_size(struct dispc_device *dispc, + u32 hw_videoport) +{ + return ARRAY_SIZE(dispc->gamma_table); +} + +static void dispc6_vp_write_gamma_table(struct dispc_device *dispc, + u32 hw_videoport) +{ + u32 *table = dispc->gamma_table; + uint hwlen = ARRAY_SIZE(dispc->gamma_table); + unsigned int i; + + dev_dbg(dispc->dev, "%s: hw_videoport %d\n", __func__, hw_videoport); + + for (i = 0; i < hwlen; ++i) { + u32 v = table[i]; + + v |= i << 24; + + dispc6_vp_write(dispc, hw_videoport, DISPC_VP_GAMMA_TABLE, v); + } +} + +static void dispc6_restore_gamma_tables(struct dispc_device *dispc) +{ + dev_dbg(dispc->dev, "%s()\n", __func__); + + dispc6_vp_write_gamma_table(dispc, 0); +} + +static const struct drm_color_lut dispc6_vp_gamma_default_lut[] = { + { .red = 0, .green = 0, .blue = 0, }, + { .red = U16_MAX, .green = U16_MAX, .blue = U16_MAX, }, +}; + +static void dispc6_vp_set_gamma(struct dispc_device *dispc, + u32 hw_videoport, + const struct drm_color_lut *lut, + unsigned int length) +{ + u32 *table = dispc->gamma_table; + uint hwlen = ARRAY_SIZE(dispc->gamma_table); + static const uint hwbits = 8; + uint i; + + dev_dbg(dispc->dev, "%s: hw_videoport %d, lut len %u, hw len %u\n", + __func__, hw_videoport, length, hwlen); + + if (lut == NULL || length < 2) { + lut = dispc6_vp_gamma_default_lut; + length = ARRAY_SIZE(dispc6_vp_gamma_default_lut); + } + + for (i = 0; i < length - 1; ++i) { + uint first = i * (hwlen - 1) / (length - 1); + uint last = (i + 1) * (hwlen - 1) / (length - 1); + uint w = last - first; + u16 r, g, b; + uint j; + + if (w == 0) + continue; + + for (j = 0; j <= w; j++) { + r = (lut[i].red * (w - j) + lut[i + 1].red * j) / w; + g = (lut[i].green * (w - j) + lut[i + 1].green * j) / w; + b = (lut[i].blue * (w - j) + lut[i + 1].blue * j) / w; + + r >>= 16 - hwbits; + g >>= 16 - hwbits; + b >>= 16 - hwbits; + + table[first + j] = (r << (hwbits * 2)) | + (g << hwbits) | b; + } + } + + if (dispc->is_enabled) + dispc6_vp_write_gamma_table(dispc, hw_videoport); +} + +static int dispc6_init_gamma_tables(struct dispc_device *dispc) +{ + dispc6_vp_set_gamma(dispc, 0, NULL, 0); + + return 0; +} + +static u32 dispc6_get_memory_bandwidth_limit(struct dispc_device *dispc) +{ + u32 limit = 0; + + /* Optional maximum memory bandwidth */ + of_property_read_u32(dispc->dev->of_node, "max-memory-bandwidth", + &limit); + + return limit; +} + +static const char *dispc6_plane_name(struct dispc_device *dispc, + u32 hw_plane) +{ + return "vid1"; +} + +static const char *dispc6_vp_name(struct dispc_device *dispc, + u32 hw_videoport) +{ + return "vp1"; +} + +static int dispc6_runtime_suspend(struct dispc_device *dispc) +{ + struct device *dev = dispc->dev; + + dev_dbg(dev, "suspend\n"); + + dispc->is_enabled = false; + + clk_disable_unprepare(dispc->fclk); + + return 0; +} + +static int dispc6_runtime_resume(struct dispc_device *dispc) +{ + struct device *dev = dispc->dev; + + dev_dbg(dev, "resume\n"); + + clk_prepare_enable(dispc->fclk); + + if (REG_GET(dispc, DISPC_SYSSTATUS, 0, 0) == 0) + dev_warn(dev, "DISPC FUNC RESET not done!\n"); + if (REG_GET(dispc, DISPC_SYSSTATUS, 1, 1) == 0) + dev_warn(dev, "DISPC VP RESET not done!\n"); + + dispc6_initial_config(dispc); + + dispc6_restore_gamma_tables(dispc); + + dispc->is_enabled = true; + + return 0; +} + +static int dispc6_modeset_init(struct dispc_device *dispc) +{ + struct tidss_device *tidss = dispc->tidss; + struct device *dev = tidss->dev; + const u32 hw_videoport = 0; + const u32 crtc_mask = 1; + const u32 hw_plane_id = 0; + struct drm_panel *panel; + struct drm_bridge *bridge; + u32 enc_type; + int ret; + struct tidss_plane *tplane; + struct tidss_crtc *tcrtc; + struct tidss_encoder *tenc; + struct device_node *epnode; + u32 fourccs[ARRAY_SIZE(dispc6_color_formats)]; + int i; + + /* first find if there is a connected panel/bridge */ + + ret = drm_of_find_panel_or_bridge(dev->of_node, hw_videoport, 0, &panel, &bridge); + if (ret) { + dev_dbg(dev, "no panel or bridge found\n"); + return ret; + } + + epnode = of_graph_get_endpoint_by_regs(dev->of_node, 0, 0); + if (WARN_ON(!epnode)) + return -EINVAL; + + if (panel) { + dev_dbg(dev, "Setting up panel\n"); + + enc_type = DRM_MODE_ENCODER_DPI; + + bridge = devm_drm_panel_bridge_add(dev, panel, DRM_MODE_CONNECTOR_DPI); + if (IS_ERR(bridge)) { + dev_err(dev, "failed to set up panel bridge\n"); + return PTR_ERR(bridge); + } + } else { + enc_type = DRM_MODE_ENCODER_NONE; + } + + /* then create a plane, a crtc and an encoder for the panel/bridge */ + + for (i = 0; i < ARRAY_SIZE(dispc6_color_formats); ++i) + fourccs[i] = dispc6_color_formats[i].fourcc; + + tplane = tidss_plane_create(tidss, hw_plane_id, DRM_PLANE_TYPE_PRIMARY, + crtc_mask, fourccs, ARRAY_SIZE(fourccs)); + if (IS_ERR(tplane)) { + dev_err(tidss->dev, "plane create failed\n"); + return PTR_ERR(tplane); + } + + tidss->planes[tidss->num_planes++] = &tplane->plane; + + tcrtc = tidss_crtc_create(tidss, hw_videoport, &tplane->plane, epnode); + if (IS_ERR(tcrtc)) { + dev_err(tidss->dev, "crtc create failed\n"); + return PTR_ERR(tcrtc); + } + + tidss->crtcs[tidss->num_crtcs++] = &tcrtc->crtc; + + tenc = tidss_encoder_create(tidss, enc_type, 1 << tcrtc->crtc.index); + if (IS_ERR(tenc)) { + dev_err(tidss->dev, "encoder create failed\n"); + return PTR_ERR(tenc); + } + + ret = drm_bridge_attach(&tenc->encoder, bridge, NULL); + if (ret) { + dev_err(tidss->dev, "bridge attach failed: %d\n", ret); + return ret; + } + + return 0; +} + +static void dispc6_remove(struct dispc_device *dispc); + +static const struct dispc_ops dispc6_ops = { + .read_and_clear_irqstatus = dispc6_read_and_clear_irqstatus, + .write_irqenable = dispc6_write_irqenable, + + .runtime_get = dispc6_runtime_get, + .runtime_put = dispc6_runtime_put, + + .get_num_planes = dispc6_get_num_planes, + .get_num_vps = dispc6_get_num_vps, + + .plane_name = dispc6_plane_name, + .vp_name = dispc6_vp_name, + + .get_memory_bandwidth_limit = dispc6_get_memory_bandwidth_limit, + + .vp_enable = dispc6_vp_enable, + .vp_go_busy = dispc6_vp_go_busy, + .vp_go = dispc6_vp_go, + .vp_set_lcd_config = dispc6_vp_set_lcd_config, + .vp_timings_ok = dispc6_vp_timings_ok, + .vp_set_timings = dispc6_vp_set_timings, + .vp_setup = dispc6_vp_setup, + .vp_gamma_size = dispc6_vp_gamma_size, + .vp_set_gamma = dispc6_vp_set_gamma, + + .plane_enable = dispc6_plane_enable, + .plane_setup = dispc6_plane_setup, + + .vp_set_clk_rate = dispc6_vp_set_clk_rate, + .vp_enable_clk = dispc6_vp_enable_clk, + .vp_disable_clk = dispc6_vp_disable_clk, + + .runtime_suspend = dispc6_runtime_suspend, + .runtime_resume = dispc6_runtime_resume, + + .remove = dispc6_remove, + + .modeset_init = dispc6_modeset_init, +}; + +static int dispc6_iomap_resource(struct platform_device *pdev, const char *name, + void __iomem **base) +{ + struct resource *res; + void __iomem *b; + + res = platform_get_resource_byname(pdev, IORESOURCE_MEM, name); + b = devm_ioremap_resource(&pdev->dev, res); + if (IS_ERR(b)) { + dev_err(&pdev->dev, "cannot ioremap resource '%s'\n", name); + return PTR_ERR(b); + } + + *base = b; + + return 0; +} + +int dispc6_init(struct tidss_device *tidss) +{ + struct device *dev = tidss->dev; + struct platform_device *pdev = tidss->pdev; + struct dispc_device *dispc; + int r; + + dev_dbg(dev, "%s\n", __func__); + + dispc = devm_kzalloc(dev, sizeof(*dispc), GFP_KERNEL); + if (!dispc) + return -ENOMEM; + + dispc->tidss = tidss; + dispc->dev = dev; + + r = dispc6_init_features(dispc); + if (r) + goto err_free; + + r = dispc6_iomap_resource(pdev, "cfg", &dispc->base_cfg); + if (r) + goto err_free; + + r = dispc6_iomap_resource(pdev, "common", &dispc->base_common); + if (r) + goto err_free; + + r = dispc6_iomap_resource(pdev, "vid1", &dispc->base_vid1); + if (r) + goto err_free; + + r = dispc6_iomap_resource(pdev, "ovr1", &dispc->base_ovr1); + if (r) + goto err_free; + + r = dispc6_iomap_resource(pdev, "vp1", &dispc->base_vp1); + if (r) + goto err_free; + + dev_dbg(dev, "dispc6_bind: iores ok\n"); + + dispc->fclk = devm_clk_get(dev, "fck"); + if (IS_ERR(dispc->fclk)) { + dev_err(dev, "Failed to get fclk\n"); + r = PTR_ERR(dispc->fclk); + goto err_free; + } + + dispc->vp_clk = devm_clk_get(dev, "vp1"); + if (IS_ERR(dispc->vp_clk)) { + dev_err(dev, "Failed to get vp1 clk\n"); + r = PTR_ERR(dispc->vp_clk); + goto err_free; + } + + r = dispc6_init_gamma_tables(dispc); + if (r) + goto err_free; + + tidss->dispc_ops = &dispc6_ops; + tidss->dispc = dispc; + + dev_dbg(dev, "%s done\n", __func__); + + return 0; +err_free: + dev_err(dev, "%s failed: %d\n", __func__, r); + return r; +} + +static void dispc6_remove(struct dispc_device *dispc) +{ + struct device *dev = dispc->dev; + + dev_dbg(dev, "dispc6_unbind\n"); + + dispc->tidss->dispc_ops = NULL; + dispc->tidss->dispc = NULL; + + dev_dbg(dev, "dispc6_unbind done\n"); +} diff --git a/drivers/gpu/drm/tidss/tidss_dispc6.h b/drivers/gpu/drm/tidss/tidss_dispc6.h new file mode 100644 index 000000000000..1cb3a4e966ee --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_dispc6.h @@ -0,0 +1,12 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_DISPC6_H__ +#define __TIDSS_DISPC6_H__ + +#include "tidss_dispc.h" + +#endif diff --git a/drivers/gpu/drm/tidss/tidss_dispc6_regs.h b/drivers/gpu/drm/tidss/tidss_dispc6_regs.h new file mode 100644 index 000000000000..4aaa5a52af09 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_dispc6_regs.h @@ -0,0 +1,109 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_DISPC6_REG_H__ +#define __TIDSS_DISPC6_REG_H__ + +/* COMMON */ + +#define DISPC_REVISION 0x000 +#define DISPC_SYSCONFIG 0x004 +#define DISPC_SYSSTATUS 0x008 + +#define DISPC_IRQ_EOI 0x020 +#define DISPC_IRQSTATUS_RAW 0x024 +#define DISPC_IRQSTATUS 0x028 +#define DISPC_IRQENABLE_SET 0x02c +#define DISPC_IRQENABLE_CLR 0x030 +#define DISPC_IRQWAKEEN 0x034 + +#define DISPC_GLOBAL_MFLAG_ATTRIBUTE 0x040 +#define DISPC_GLOBAL_BUFFER 0x044 +#define DISPC_BA0_FLIPIMMEDIATE_EN 0x048 + +#define DISPC_DBG_CONTROL 0x04c +#define DISPC_DBG_STATUS 0x050 + +#define DISPC_CLKGATING_DISABLE 0x054 + +/* VID */ + +#define DISPC_VID_ACCUH_0 0x0 +#define DISPC_VID_ACCUH_1 0x4 +#define DISPC_VID_ACCUH2_0 0x8 +#define DISPC_VID_ACCUH2_1 0xc + +#define DISPC_VID_ACCUV_0 0x10 +#define DISPC_VID_ACCUV_1 0x14 +#define DISPC_VID_ACCUV2_0 0x18 +#define DISPC_VID_ACCUV2_1 0x1c + +#define DISPC_VID_ATTRIBUTES 0x20 +#define DISPC_VID_ATTRIBUTES2 0x24 + +#define DISPC_VID_BA_0 0x28 +#define DISPC_VID_BA_1 0x2c +#define DISPC_VID_BA_UV_0 0x30 +#define DISPC_VID_BA_UV_1 0x34 +#define DISPC_VID_BUF_SIZE_STATUS 0x38 +#define DISPC_VID_BUF_THRESHOLD 0x3c + +#define DISPC_VID_CONV_COEF(n) (0x40 + (n) * 4) + +#define DISPC_VID_FIRH 0x5c +#define DISPC_VID_FIRH2 0x60 +#define DISPC_VID_FIRV 0x64 +#define DISPC_VID_FIRV2 0x68 + +#define DISPC_VID_FIR_COEFS_H0 0x6c +#define DISPC_VID_FIR_COEF_H0(phase) (0x6c + (phase) * 4) +#define DISPC_VID_FIR_COEFS_H0_C 0x90 +#define DISPC_VID_FIR_COEF_H0_C(phase) (0x90 + (phase) * 4) + +#define DISPC_VID_FIR_COEFS_H12 0xb4 +#define DISPC_VID_FIR_COEF_H12(phase) (0xb4 + (phase) * 4) +#define DISPC_VID_FIR_COEFS_H12_C 0xf4 +#define DISPC_VID_FIR_COEF_H12_C(phase) (0xf4 + (phase) * 4) + +#define DISPC_VID_FIR_COEFS_V0 0x134 +#define DISPC_VID_FIR_COEF_V0(phase) (0x134 + (phase) * 4) +#define DISPC_VID_FIR_COEFS_V0_C 0x158 +#define DISPC_VID_FIR_COEF_V0_C(phase) (0x158 + (phase) * 4) + +#define DISPC_VID_FIR_COEFS_V12 0x17c +#define DISPC_VID_FIR_COEF_V12(phase) (0x17c + (phase) * 4) +#define DISPC_VID_FIR_COEFS_V12_C 0x1bc +#define DISPC_VID_FIR_COEF_V12_C(phase) (0x1bc + (phase) * 4) + +#define DISPC_VID_IRQENABLE 0x200 +#define DISPC_VID_IRQSTATUS 0x204 + +#define DISPC_VID_MFLAG_THRESHOLD 0x208 +#define DISPC_VID_PICTURE_SIZE 0x20c +#define DISPC_VID_PIXEL_INC 0x210 +#define DISPC_VID_POSITION 0x214 +#define DISPC_VID_PRELOAD 0x218 +#define DISPC_VID_ROW_INC 0x21c +#define DISPC_VID_SIZE 0x220 + +/* OVR */ + +#define DISPC_OVR_DEFAULT_COLOR 0x08 +#define DISPC_OVR_DEFAULT_COLOR2 0x0c + +/* VP */ + +#define DISPC_VP_CONFIG 0x00 +#define DISPC_VP_CONTROL 0x04 +#define DISPC_VP_GAMMA_TABLE 0x20 +#define DISPC_VP_IRQENABLE 0x3c +#define DISPC_VP_IRQSTATUS 0x40 +#define DISPC_VP_POL_FREQ 0x4c +#define DISPC_VP_SIZE_SCREEN 0x50 +#define DISPC_VP_TIMING_H 0x54 +#define DISPC_VP_TIMING_V 0x58 + +#endif diff --git a/drivers/gpu/drm/tidss/tidss_drv.c b/drivers/gpu/drm/tidss/tidss_drv.c new file mode 100644 index 000000000000..b4591e8bee67 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_drv.c @@ -0,0 +1,331 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#include <linux/console.h> +#include <linux/of_device.h> +#include <linux/pm_runtime.h> + +#include <drm/drmP.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_gem_cma_helper.h> + +#include "tidss_dispc.h" +#include "tidss_drv.h" +#include "tidss_irq.h" +#include "tidss_kms.h" + +/* ----------------------------------------------------------------------------- + * Device Information + */ + +static const struct tidss_features tidss_k2g_feats = { + .dispc_init = dispc6_init, +}; + +static const struct of_device_id tidss_of_table[] = { + { .compatible = "ti,k2g-dss", .data = &tidss_k2g_feats }, + { } +}; + +DEFINE_DRM_GEM_CMA_FOPS(tidss_fops); + +static struct drm_driver tidss_driver = { + .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_PRIME + | DRIVER_ATOMIC | DRIVER_HAVE_IRQ, + .gem_free_object_unlocked = drm_gem_cma_free_object, + .gem_vm_ops = &drm_gem_cma_vm_ops, + .prime_handle_to_fd = drm_gem_prime_handle_to_fd, + .prime_fd_to_handle = drm_gem_prime_fd_to_handle, + .gem_prime_import = drm_gem_prime_import, + .gem_prime_export = drm_gem_prime_export, + .gem_prime_get_sg_table = drm_gem_cma_prime_get_sg_table, + .gem_prime_import_sg_table = drm_gem_cma_prime_import_sg_table, + .gem_prime_vmap = drm_gem_cma_prime_vmap, + .gem_prime_vunmap = drm_gem_cma_prime_vunmap, + .gem_prime_mmap = drm_gem_cma_prime_mmap, + .dumb_create = drm_gem_cma_dumb_create, + .fops = &tidss_fops, + .name = "tidss", + .desc = "TI Keystone DSS", + .date = "20180215", + .major = 1, + .minor = 0, + + .irq_preinstall = tidss_irq_preinstall, + .irq_postinstall = tidss_irq_postinstall, + .irq_handler = tidss_irq_handler, + .irq_uninstall = tidss_irq_uninstall, +}; + +#ifdef CONFIG_PM +/* ----------------------------------------------------------------------------- + * Power management + */ + +static int tidss_pm_runtime_suspend(struct device *dev) +{ + struct tidss_device *tidss = dev_get_drvdata(dev); + + dev_dbg(dev, "%s\n", __func__); + + return tidss->dispc_ops->runtime_suspend(tidss->dispc); +} + +static int tidss_pm_runtime_resume(struct device *dev) +{ + struct tidss_device *tidss = dev_get_drvdata(dev); + int r; + + dev_dbg(dev, "%s\n", __func__); + + r = tidss->dispc_ops->runtime_resume(tidss->dispc); + if (r) + return r; + + tidss_irq_resume(tidss->ddev); + + return 0; +} + +#ifdef CONFIG_PM_SLEEP +static int tidss_suspend(struct device *dev) +{ + struct tidss_device *tidss = dev_get_drvdata(dev); + struct drm_atomic_state *state; + + drm_kms_helper_poll_disable(tidss->ddev); + + console_lock(); + drm_fbdev_cma_set_suspend(tidss->fbdev, 1); + console_unlock(); + + state = drm_atomic_helper_suspend(tidss->ddev); + + if (IS_ERR(state)) { + console_lock(); + drm_fbdev_cma_set_suspend(tidss->fbdev, 0); + console_unlock(); + + drm_kms_helper_poll_enable(tidss->ddev); + + return PTR_ERR(state); + } + + tidss->saved_state = state; + + return 0; +} + +static int tidss_resume(struct device *dev) +{ + struct tidss_device *tidss = dev_get_drvdata(dev); + int ret = 0; + + if (tidss->saved_state) + ret = drm_atomic_helper_resume(tidss->ddev, tidss->saved_state); + + console_lock(); + drm_fbdev_cma_set_suspend(tidss->fbdev, 0); + console_unlock(); + + drm_kms_helper_poll_enable(tidss->ddev); + + return ret; +} +#endif /* CONFIG_PM_SLEEP */ + +static const struct dev_pm_ops tidss_pm_ops = { + .runtime_suspend = tidss_pm_runtime_suspend, + .runtime_resume = tidss_pm_runtime_resume, + SET_SYSTEM_SLEEP_PM_OPS(tidss_suspend, tidss_resume) +}; + +#endif /* CONFIG_PM */ + +/* ----------------------------------------------------------------------------- + * Platform driver + */ + +static int tidss_probe(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct tidss_device *tidss; + struct drm_device *ddev; + int ret; + int irq; + + dev_dbg(dev, "%s\n", __func__); + + tidss = devm_kzalloc(dev, sizeof(*tidss), GFP_KERNEL); + if (tidss == NULL) + return -ENOMEM; + + tidss->pdev = pdev; + tidss->dev = dev; + tidss->feat = of_device_get_match_data(dev); + + platform_set_drvdata(pdev, tidss); + + ddev = drm_dev_alloc(&tidss_driver, dev); + if (IS_ERR(ddev)) + return PTR_ERR(ddev); + + tidss->ddev = ddev; + ddev->dev_private = tidss; + + pm_runtime_enable(dev); + + ret = tidss->feat->dispc_init(tidss); + if (ret) { + dev_err(dev, "failed to initialize dispc: %d\n", ret); + goto err_disable_pm; + } + +#ifndef CONFIG_PM_SLEEP + /* no PM, so force enable DISPC */ + tidss->dispc_ops->runtime_resume(tidss->dispc); +#endif + + ret = tidss_modeset_init(tidss); + if (ret < 0) { + if (ret != -EPROBE_DEFER) + dev_err(dev, "failed to init DRM/KMS (%d)\n", ret); + goto err_runtime_suspend; + } + + irq = platform_get_irq(tidss->pdev, 0); + if (irq < 0) { + ret = irq; + dev_err(dev, "platform_get_irq failed: %d\n", ret); + goto err_modeset_cleanup; + } + + ret = drm_irq_install(ddev, irq); + if (ret) { + dev_err(dev, "drm_irq_install failed: %d\n", ret); + goto err_modeset_cleanup; + } + +#ifdef CONFIG_DRM_FBDEV_EMULATION + if (ddev->mode_config.num_connector) { + struct drm_fbdev_cma *fbdev; + + fbdev = drm_fbdev_cma_init(ddev, 32, + ddev->mode_config.num_connector); + if (IS_ERR(fbdev)) { + dev_err(tidss->dev, "fbdev init failed\n"); + ret = PTR_ERR(fbdev); + goto err_irq_uninstall; + } + + tidss->fbdev = fbdev; + } +#endif + + drm_kms_helper_poll_init(ddev); + + ret = drm_dev_register(ddev, 0); + if (ret) { + dev_err(dev, "failed to register DRM device\n"); + goto err_poll_fini; + } + + dev_dbg(dev, "%s done\n", __func__); + + return 0; + +err_poll_fini: + drm_kms_helper_poll_fini(ddev); + + if (tidss->fbdev) + drm_fbdev_cma_fini(tidss->fbdev); + + drm_atomic_helper_shutdown(ddev); + +err_irq_uninstall: + drm_irq_uninstall(ddev); + +err_modeset_cleanup: + drm_mode_config_cleanup(ddev); + +err_runtime_suspend: +#ifndef CONFIG_PM_SLEEP + /* no PM, so force disable DISPC */ + tidss->dispc_ops->runtime_suspend(tidss->dispc); +#endif + + tidss->dispc_ops->remove(tidss->dispc); + +err_disable_pm: + pm_runtime_disable(dev); + + drm_dev_put(ddev); + + return ret; +} + +static int tidss_remove(struct platform_device *pdev) +{ + struct device *dev = &pdev->dev; + struct tidss_device *tidss = platform_get_drvdata(pdev); + struct drm_device *ddev = tidss->ddev; + + dev_dbg(dev, "%s\n", __func__); + + drm_dev_unregister(ddev); + + drm_kms_helper_poll_fini(ddev); + + if (tidss->fbdev) + drm_fbdev_cma_fini(tidss->fbdev); + + drm_atomic_helper_shutdown(ddev); + + drm_irq_uninstall(ddev); + + drm_mode_config_cleanup(ddev); + +#ifndef CONFIG_PM_SLEEP + /* no PM, so force disable DISPC */ + tidss->dispc_ops->runtime_suspend(tidss->dispc); +#endif + + tidss->dispc_ops->remove(tidss->dispc); + + pm_runtime_disable(dev); + + drm_dev_put(ddev); + + dev_dbg(dev, "%s done\n", __func__); + + return 0; +} + +MODULE_DEVICE_TABLE(of, tidss_of_table); + +static struct platform_driver tidss_platform_driver = { + .probe = tidss_probe, + .remove = tidss_remove, + .driver = { + .name = "tidss", +#ifdef CONFIG_PM + .pm = &tidss_pm_ops, +#endif + .of_match_table = tidss_of_table, + .suppress_bind_attrs = true, + }, +}; + +module_platform_driver(tidss_platform_driver); + +MODULE_AUTHOR("Tomi Valkeinen tomi.valkeinen@ti.com"); +MODULE_DESCRIPTION("TI Keystone DSS Driver"); +MODULE_LICENSE("GPL v2"); diff --git a/drivers/gpu/drm/tidss/tidss_drv.h b/drivers/gpu/drm/tidss/tidss_drv.h new file mode 100644 index 000000000000..fd1e767e9308 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_drv.h @@ -0,0 +1,41 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_DRV_H__ +#define __TIDSS_DRV_H__ + +#include <linux/spinlock.h> + +struct tidss_device { + struct device *dev; /* Underlying DSS device */ + struct platform_device *pdev; /* Underlying DSS platform device */ + struct drm_device *ddev; /* DRM device for DSS */ + + struct drm_fbdev_cma *fbdev; + + struct dispc_device *dispc; + const struct dispc_ops *dispc_ops; + + const struct tidss_features *feat; + + u32 num_crtcs; + struct drm_crtc *crtcs[8]; + + u32 num_planes; + struct drm_plane *planes[8]; + + spinlock_t wait_lock; /* protects the irq masks */ + u64 irq_mask; /* enabled irqs in addition to wait_list */ + u64 irq_uf_mask; /* underflow irq bits for all planes */ + + struct drm_atomic_state *saved_state; +}; + +struct tidss_features { + int (*dispc_init)(struct tidss_device *tidss); +}; + +#endif diff --git a/drivers/gpu/drm/tidss/tidss_encoder.c b/drivers/gpu/drm/tidss/tidss_encoder.c new file mode 100644 index 000000000000..fb7bc3fc0fe8 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_encoder.c @@ -0,0 +1,101 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#include <linux/export.h> + +#include <drm/drmP.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_panel.h> +#include <drm/drm_of.h> + +#include "tidss_drv.h" +#include "tidss_encoder.h" +#include "tidss_crtc.h" + +/* ----------------------------------------------------------------------------- + * Encoder + */ + +static void tidss_encoder_disable(struct drm_encoder *encoder) +{ + struct drm_device *ddev = encoder->dev; + + dev_dbg(ddev->dev, "%s\n", __func__); + +} + +static void tidss_encoder_enable(struct drm_encoder *encoder) +{ + struct drm_device *ddev = encoder->dev; + + dev_dbg(ddev->dev, "%s\n", __func__); + +} + +static int tidss_encoder_atomic_check(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct drm_device *ddev = encoder->dev; + struct tidss_crtc_state *tcrtc_state = to_tidss_crtc_state(crtc_state); + struct drm_display_info *di = &conn_state->connector->display_info; + + dev_dbg(ddev->dev, "%s\n", __func__); + + // XXX any cleaner way to set bus format and flags? + tcrtc_state->bus_format = di->bus_formats[0]; + tcrtc_state->bus_flags = di->bus_flags; + + return 0; +} + +static void tidss_encoder_mode_set(struct drm_encoder *encoder, + struct drm_crtc_state *crtc_state, + struct drm_connector_state *conn_state) +{ + struct drm_device *ddev = encoder->dev; + + dev_dbg(ddev->dev, "%s\n", __func__); + +} + +static const struct drm_encoder_helper_funcs encoder_helper_funcs = { + .atomic_mode_set = tidss_encoder_mode_set, + .disable = tidss_encoder_disable, + .enable = tidss_encoder_enable, + .atomic_check = tidss_encoder_atomic_check, +}; + +static const struct drm_encoder_funcs encoder_funcs = { + .destroy = drm_encoder_cleanup, +}; + +struct tidss_encoder *tidss_encoder_create(struct tidss_device *tidss, + u32 encoder_type, u32 possible_crtcs) +{ + struct tidss_encoder *tenc; + struct drm_encoder *enc; + int ret; + + tenc = devm_kzalloc(tidss->dev, sizeof(*tenc), GFP_KERNEL); + if (!tenc) + return ERR_PTR(-ENOMEM); + + enc = &tenc->encoder; + enc->possible_crtcs = possible_crtcs; + + ret = drm_encoder_init(tidss->ddev, enc, &encoder_funcs, + encoder_type, NULL); + if (ret < 0) + return ERR_PTR(ret); + + drm_encoder_helper_add(enc, &encoder_helper_funcs); + + dev_dbg(tidss->dev, "Encoder create done\n"); + + return tenc; +} diff --git a/drivers/gpu/drm/tidss/tidss_encoder.h b/drivers/gpu/drm/tidss/tidss_encoder.h new file mode 100644 index 000000000000..f1bd05a3f611 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_encoder.h @@ -0,0 +1,22 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_ENCODER_H__ +#define __TIDSS_ENCODER_H__ + +#include <drm/drm_encoder.h> + +struct tidss_device; +struct tidss_crtc; + +struct tidss_encoder { + struct drm_encoder encoder; +}; + +struct tidss_encoder *tidss_encoder_create(struct tidss_device *tidss, + u32 encoder_type, u32 possible_crtcs); + +#endif diff --git a/drivers/gpu/drm/tidss/tidss_irq.c b/drivers/gpu/drm/tidss/tidss_irq.c new file mode 100644 index 000000000000..07c4e1f0924e --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_irq.c @@ -0,0 +1,193 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#include <drm/drmP.h> + +#include "tidss_irq.h" +#include "tidss_drv.h" +#include "tidss_dispc.h" +#include "tidss_crtc.h" +#include "tidss_plane.h" + +/* call with wait_lock and dispc runtime held */ +static void tidss_irq_update(struct drm_device *ddev) +{ + struct tidss_device *tidss = ddev->dev_private; + + assert_spin_locked(&tidss->wait_lock); + + tidss->dispc_ops->write_irqenable(tidss->dispc, tidss->irq_mask); +} + +void tidss_irq_enable_vblank(struct drm_crtc *crtc) +{ + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + u32 hw_videoport = tcrtc->hw_videoport; + unsigned long flags; + + spin_lock_irqsave(&tidss->wait_lock, flags); + tidss->irq_mask |= DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | + DSS_IRQ_VP_VSYNC_ODD(hw_videoport); + tidss_irq_update(ddev); + spin_unlock_irqrestore(&tidss->wait_lock, flags); +} + +void tidss_irq_disable_vblank(struct drm_crtc *crtc) +{ + struct drm_device *ddev = crtc->dev; + struct tidss_device *tidss = ddev->dev_private; + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + u32 hw_videoport = tcrtc->hw_videoport; + unsigned long flags; + + spin_lock_irqsave(&tidss->wait_lock, flags); + tidss->irq_mask &= ~(DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | + DSS_IRQ_VP_VSYNC_ODD(hw_videoport)); + tidss_irq_update(ddev); + spin_unlock_irqrestore(&tidss->wait_lock, flags); +} + +static void tidss_irq_fifo_underflow(struct tidss_device *tidss, + u64 irqstatus) +{ + static DEFINE_RATELIMIT_STATE(_rs, DEFAULT_RATELIMIT_INTERVAL, + DEFAULT_RATELIMIT_BURST); + unsigned int i; + u64 masked; + + spin_lock(&tidss->wait_lock); + masked = irqstatus & tidss->irq_uf_mask & tidss->irq_mask; + spin_unlock(&tidss->wait_lock); + + if (!masked) + return; + + if (!__ratelimit(&_rs)) + return; + + DRM_ERROR("FIFO underflow on "); + + for (i = 0; i < DSS_MAX_PLANES; ++i) { + if (masked & DSS_IRQ_PLANE_FIFO_UNDERFLOW(i)) + pr_cont("%u:%s ", i, + tidss->dispc_ops->plane_name(tidss->dispc, i)); + } + + pr_cont("(%016llx)\n", irqstatus); +} + +static void tidss_irq_ocp_error_handler(struct drm_device *ddev, + u64 irqstatus) +{ + if (irqstatus & DSS_IRQ_DEVICE_OCP_ERR) + dev_err_ratelimited(ddev->dev, "OCP error\n"); +} + +irqreturn_t tidss_irq_handler(int irq, void *arg) +{ + struct drm_device *ddev = (struct drm_device *) arg; + struct tidss_device *tidss = ddev->dev_private; + unsigned int id; + u64 irqstatus; + + if (WARN_ON(!ddev->irq_enabled)) + return IRQ_NONE; + + irqstatus = tidss->dispc_ops->read_and_clear_irqstatus(tidss->dispc); + + for (id = 0; id < tidss->num_crtcs; id++) { + struct drm_crtc *crtc = tidss->crtcs[id]; + struct tidss_crtc *tcrtc = to_tidss_crtc(crtc); + u32 hw_videoport = tcrtc->hw_videoport; + + if (irqstatus & (DSS_IRQ_VP_VSYNC_EVEN(hw_videoport) | + DSS_IRQ_VP_VSYNC_ODD(hw_videoport))) + tidss_crtc_vblank_irq(crtc); + + if (irqstatus & (DSS_IRQ_VP_FRAME_DONE(hw_videoport))) + tidss_crtc_framedone_irq(crtc); + + if (irqstatus & DSS_IRQ_VP_SYNC_LOST(hw_videoport)) + tidss_crtc_error_irq(crtc, irqstatus); + } + + tidss_irq_ocp_error_handler(ddev, irqstatus); + tidss_irq_fifo_underflow(tidss, irqstatus); + + return IRQ_HANDLED; +} + +void tidss_irq_preinstall(struct drm_device *ddev) +{ + struct tidss_device *tidss = ddev->dev_private; + + spin_lock_init(&tidss->wait_lock); + + tidss->dispc_ops->runtime_get(tidss->dispc); + + tidss->dispc_ops->write_irqenable(tidss->dispc, 0); + tidss->dispc_ops->read_and_clear_irqstatus(tidss->dispc); + + tidss->dispc_ops->runtime_put(tidss->dispc); +} + +int tidss_irq_postinstall(struct drm_device *ddev) +{ + struct tidss_device *tidss = ddev->dev_private; + unsigned int i; + unsigned long flags; + + tidss->dispc_ops->runtime_get(tidss->dispc); + + spin_lock_irqsave(&tidss->wait_lock, flags); + + tidss->irq_mask = DSS_IRQ_DEVICE_OCP_ERR; + + tidss->irq_uf_mask = 0; + for (i = 0; i < tidss->num_planes; ++i) { + struct tidss_plane *tplane = to_tidss_plane(tidss->planes[i]); + + tidss->irq_uf_mask |= DSS_IRQ_PLANE_FIFO_UNDERFLOW(tplane->hw_plane_id); + } + tidss->irq_mask |= tidss->irq_uf_mask; + + for (i = 0; i < tidss->num_crtcs; ++i) { + struct tidss_crtc *tcrtc = to_tidss_crtc(tidss->crtcs[i]); + + tidss->irq_mask |= DSS_IRQ_VP_SYNC_LOST(tcrtc->hw_videoport); + + tidss->irq_mask |= DSS_IRQ_VP_FRAME_DONE(tcrtc->hw_videoport); + } + + tidss_irq_update(ddev); + + spin_unlock_irqrestore(&tidss->wait_lock, flags); + + tidss->dispc_ops->runtime_put(tidss->dispc); + + return 0; +} + +void tidss_irq_uninstall(struct drm_device *ddev) +{ + struct tidss_device *tidss = ddev->dev_private; + + tidss->dispc_ops->runtime_get(tidss->dispc); + tidss->dispc_ops->write_irqenable(tidss->dispc, 0); + tidss->dispc_ops->runtime_put(tidss->dispc); +} + +void tidss_irq_resume(struct drm_device *ddev) +{ + struct tidss_device *tidss = ddev->dev_private; + unsigned long flags; + + spin_lock_irqsave(&tidss->wait_lock, flags); + tidss_irq_update(ddev); + spin_unlock_irqrestore(&tidss->wait_lock, flags); +} diff --git a/drivers/gpu/drm/tidss/tidss_irq.h b/drivers/gpu/drm/tidss/tidss_irq.h new file mode 100644 index 000000000000..e1507298c9d8 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_irq.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_IRQ_H__ +#define __TIDSS_IRQ_H__ + +#include <linux/types.h> + +struct drm_crtc; +struct drm_device; + +void tidss_irq_enable_vblank(struct drm_crtc *crtc); +void tidss_irq_disable_vblank(struct drm_crtc *crtc); + +void tidss_irq_preinstall(struct drm_device *ddev); +int tidss_irq_postinstall(struct drm_device *ddev); +void tidss_irq_uninstall(struct drm_device *ddev); +irqreturn_t tidss_irq_handler(int irq, void *arg); + +void tidss_irq_resume(struct drm_device *ddev); + +#endif diff --git a/drivers/gpu/drm/tidss/tidss_kms.c b/drivers/gpu/drm/tidss/tidss_kms.c new file mode 100644 index 000000000000..cd003f1569cd --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_kms.c @@ -0,0 +1,85 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_gem_framebuffer_helper.h> + +#include "tidss_crtc.h" +#include "tidss_drv.h" +#include "tidss_encoder.h" +#include "tidss_kms.h" +#include "tidss_plane.h" + +static void tidss_atomic_commit_tail(struct drm_atomic_state *old_state) +{ + struct drm_device *ddev = old_state->dev; + struct tidss_device *tidss = ddev->dev_private; + + dev_dbg(ddev->dev, "%s\n", __func__); + + tidss->dispc_ops->runtime_get(tidss->dispc); + + drm_atomic_helper_commit_modeset_disables(ddev, old_state); + drm_atomic_helper_commit_planes(ddev, old_state, 0); + drm_atomic_helper_commit_modeset_enables(ddev, old_state); + + drm_atomic_helper_commit_hw_done(old_state); + drm_atomic_helper_wait_for_flip_done(ddev, old_state); + + drm_atomic_helper_cleanup_planes(ddev, old_state); + + tidss->dispc_ops->runtime_put(tidss->dispc); +} + +static const struct drm_mode_config_helper_funcs mode_config_helper_funcs = { + .atomic_commit_tail = tidss_atomic_commit_tail, +}; + +static const struct drm_mode_config_funcs mode_config_funcs = { + .fb_create = drm_gem_fb_create, + .atomic_check = drm_atomic_helper_check, + .atomic_commit = drm_atomic_helper_commit, +}; + +int tidss_modeset_init(struct tidss_device *tidss) +{ + struct drm_device *ddev = tidss->ddev; + int ret; + int i; + + dev_dbg(tidss->dev, "%s\n", __func__); + + drm_mode_config_init(ddev); + + ddev->mode_config.min_width = 8; + ddev->mode_config.min_height = 8; + ddev->mode_config.max_width = 8096; + ddev->mode_config.max_height = 8096; + ddev->mode_config.funcs = &mode_config_funcs; + ddev->mode_config.helper_private = &mode_config_helper_funcs; + + ret = tidss->dispc_ops->modeset_init(tidss->dispc); + if (ret) + return ret; + + ret = drm_vblank_init(ddev, tidss->num_crtcs); + if (ret) + return ret; + + /* Start with vertical blanking interrupt reporting disabled. */ + for (i = 0; i < tidss->num_crtcs; ++i) + drm_crtc_vblank_reset(tidss->crtcs[i]); + + drm_mode_config_reset(ddev); + + dev_dbg(tidss->dev, "%s done\n", __func__); + + return 0; +} diff --git a/drivers/gpu/drm/tidss/tidss_kms.h b/drivers/gpu/drm/tidss/tidss_kms.h new file mode 100644 index 000000000000..927b57b05827 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_kms.h @@ -0,0 +1,14 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_KMS_H__ +#define __TIDSS_KMS_H__ + +struct tidss_device; + +int tidss_modeset_init(struct tidss_device *rcdu); + +#endif diff --git a/drivers/gpu/drm/tidss/tidss_plane.c b/drivers/gpu/drm/tidss/tidss_plane.c new file mode 100644 index 000000000000..c632457d9858 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_plane.c @@ -0,0 +1,187 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#include <drm/drmP.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_crtc.h> +#include <drm/drm_crtc_helper.h> +#include <drm/drm_fb_cma_helper.h> +#include <drm/drm_gem_cma_helper.h> +#include <drm/drm_plane_helper.h> +#include <video/videomode.h> + +#include "tidss_crtc.h" +#include "tidss_drv.h" +#include "tidss_plane.h" + +static int tidss_plane_atomic_check(struct drm_plane *plane, + struct drm_plane_state *state) +{ + struct drm_device *ddev = plane->dev; + struct drm_crtc_state *crtc_state; + int ret; + + dev_dbg(ddev->dev, "%s\n", __func__); + + if (!state->crtc) { + /* + * The visible field is not reset by the DRM core but only + * updated by drm_plane_helper_check_state(), set it manually. + */ + state->visible = false; + return 0; + } + + crtc_state = drm_atomic_get_crtc_state(state->state, state->crtc); + if (IS_ERR(crtc_state)) + return PTR_ERR(crtc_state); + + /* XXX TODO: check scaling via dispc_ops */ + + ret = drm_atomic_helper_check_plane_state(state, crtc_state, + 0, + INT_MAX, + true, true); + if (ret < 0) + return ret; + + if (!state->visible) + return 0; + + return 0; +} + +static void tidss_plane_atomic_update(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct drm_device *ddev = plane->dev; + struct tidss_device *tidss = ddev->dev_private; + struct tidss_plane *tplane = to_tidss_plane(plane); + struct tidss_plane_info info; + int ret; + u32 hw_videoport; + struct drm_plane_state *state = plane->state; + struct drm_framebuffer *fb = state->fb; + uint32_t x, y; + struct drm_gem_cma_object *gem; + + dev_dbg(ddev->dev, "%s\n", __func__); + + if (!state->visible) { + tidss->dispc_ops->plane_enable(tidss->dispc, tplane->hw_plane_id, + false); + return; + } + + hw_videoport = to_tidss_crtc(state->crtc)->hw_videoport; + + memset(&info, 0, sizeof(info)); + + info.fourcc = fb->format->format; + info.pos_x = state->crtc_x; + info.pos_y = state->crtc_y; + info.out_width = state->crtc_w; + info.out_height = state->crtc_h; + info.width = state->src_w >> 16; + info.height = state->src_h >> 16; + info.zorder = state->zpos; + + x = state->src_x >> 16; + y = state->src_y >> 16; + + gem = drm_fb_cma_get_gem_obj(fb, 0); + + info.paddr = gem->paddr + fb->offsets[0] + x * fb->format->cpp[0] + + y * fb->pitches[0]; + + info.fb_width = fb->pitches[0] / fb->format->cpp[0]; + + if (fb->format->num_planes == 2) { + gem = drm_fb_cma_get_gem_obj(fb, 1); + + info.p_uv_addr = gem->paddr + + fb->offsets[0] + + (x * fb->format->cpp[0] / fb->format->hsub) + + (y * fb->pitches[0] / fb->format->vsub); + } + + ret = tidss->dispc_ops->plane_setup(tidss->dispc, tplane->hw_plane_id, + &info, false, hw_videoport); + + if (ret) { + dev_err(plane->dev->dev, "Failed to setup plane %d\n", + tplane->hw_plane_id); + tidss->dispc_ops->plane_enable(tidss->dispc, tplane->hw_plane_id, + false); + return; + } + + tidss->dispc_ops->plane_enable(tidss->dispc, tplane->hw_plane_id, true); +} + +static void tidss_plane_atomic_disable(struct drm_plane *plane, + struct drm_plane_state *old_state) +{ + struct drm_device *ddev = plane->dev; + struct tidss_device *tidss = ddev->dev_private; + struct tidss_plane *tplane = to_tidss_plane(plane); + + dev_dbg(ddev->dev, "%s\n", __func__); + + tidss->dispc_ops->plane_enable(tidss->dispc, tplane->hw_plane_id, false); +} + +static const struct drm_plane_helper_funcs tidss_plane_helper_funcs = { + .atomic_check = tidss_plane_atomic_check, + .atomic_update = tidss_plane_atomic_update, + .atomic_disable = tidss_plane_atomic_disable, +}; + +static const struct drm_plane_funcs tidss_plane_funcs = { + .update_plane = drm_atomic_helper_update_plane, + .disable_plane = drm_atomic_helper_disable_plane, + .reset = drm_atomic_helper_plane_reset, + .destroy = drm_plane_cleanup, + .atomic_duplicate_state = drm_atomic_helper_plane_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_plane_destroy_state, +}; + +struct tidss_plane *tidss_plane_create(struct tidss_device *tidss, + u32 hw_plane_id, u32 plane_type, + u32 crtc_mask, const u32 *formats, + u32 num_formats) +{ + enum drm_plane_type type; + uint32_t possible_crtcs; + uint num_planes = tidss->dispc_ops->get_num_planes(tidss->dispc); + int ret; + struct tidss_plane *tplane; + + tplane = devm_kzalloc(tidss->dev, sizeof(*tplane), GFP_KERNEL); + if (!tplane) + return ERR_PTR(-ENOMEM); + + tplane->hw_plane_id = hw_plane_id; + + possible_crtcs = crtc_mask; + type = plane_type; + + ret = drm_universal_plane_init(tidss->ddev, &tplane->plane, + possible_crtcs, + &tidss_plane_funcs, + formats, num_formats, + NULL, type, NULL); + if (ret < 0) + return ERR_PTR(ret); + + drm_plane_helper_add(&tplane->plane, &tidss_plane_helper_funcs); + if (num_planes > 1) + drm_plane_create_zpos_property(&tplane->plane, hw_plane_id, 0, + num_planes - 1); + + return tplane; +} diff --git a/drivers/gpu/drm/tidss/tidss_plane.h b/drivers/gpu/drm/tidss/tidss_plane.h new file mode 100644 index 000000000000..d865e14cb5f9 --- /dev/null +++ b/drivers/gpu/drm/tidss/tidss_plane.h @@ -0,0 +1,25 @@ +/* SPDX-License-Identifier: GPL-2.0 */ +/* + * Copyright (C) 2018 Texas Instruments Incorporated - http://www.ti.com/ + * Author: Tomi Valkeinen tomi.valkeinen@ti.com + */ + +#ifndef __TIDSS_PLANE_H__ +#define __TIDSS_PLANE_H__ + +#include "tidss_dispc.h" + +#define to_tidss_plane(p) container_of((p), struct tidss_plane, plane) + +struct tidss_plane { + struct drm_plane plane; + + u32 hw_plane_id; + +}; + +struct tidss_plane *tidss_plane_create(struct tidss_device *tidss, + u32 hw_plane_id, u32 plane_type, + u32 crtc_mask, const u32 *formats, + u32 num_formats); +#endif

Add DSS node to k2g.dtsi.

Signed-off-by: Tomi Valkeinen tomi.valkeinen@ti.com Cc: devicetree@vger.kernel.org --- arch/arm/boot/dts/keystone-k2g.dtsi | 21 +++++++++++++++++++++ 1 file changed, 21 insertions(+)

diff --git a/arch/arm/boot/dts/keystone-k2g.dtsi b/arch/arm/boot/dts/keystone-k2g.dtsi index da78c0034427..d761fe7d46e7 100644 --- a/arch/arm/boot/dts/keystone-k2g.dtsi +++ b/arch/arm/boot/dts/keystone-k2g.dtsi @@ -609,5 +609,26 @@ reg = <0x21010000 0x200>; interrupts = <GIC_SPI 123 IRQ_TYPE_EDGE_RISING>; }; + + dss: dss@02540000 { + compatible = "ti,k2g-dss"; + + reg = <0x02540000 0x400>, + <0x02550000 0x1000>, + <0x02557000 0x1000>, + <0x0255a800 0x100>, + <0x0255ac00 0x100>; + + reg-names = "cfg", "common", "vid1", "ovr1", "vp1"; + + clocks = <&k2g_clks 0x2 0>, <&k2g_clks 0x2 1>; + clock-names = "fck", "vp1"; + + power-domains = <&k2g_pds 0x2>; + + interrupts = <GIC_SPI 247 IRQ_TYPE_EDGE_RISING>; + + status = "disabled"; + }; }; };