diff options
Diffstat (limited to 'drivers/gpu/drm/imx/dcss/dcss-crtc.c')
| -rw-r--r-- | drivers/gpu/drm/imx/dcss/dcss-crtc.c | 224 |
1 files changed, 224 insertions, 0 deletions
diff --git a/drivers/gpu/drm/imx/dcss/dcss-crtc.c b/drivers/gpu/drm/imx/dcss/dcss-crtc.c new file mode 100644 index 000000000..31267c007 --- /dev/null +++ b/drivers/gpu/drm/imx/dcss/dcss-crtc.c @@ -0,0 +1,224 @@ +// SPDX-License-Identifier: GPL-2.0 +/* + * Copyright 2019 NXP. + */ + +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> +#include <drm/drm_vblank.h> +#include <linux/platform_device.h> +#include <linux/pm_runtime.h> + +#include "dcss-dev.h" +#include "dcss-kms.h" + +static int dcss_enable_vblank(struct drm_crtc *crtc) +{ + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = crtc->dev->dev_private; + + dcss_dtg_vblank_irq_enable(dcss->dtg, true); + + dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, true); + + enable_irq(dcss_crtc->irq); + + return 0; +} + +static void dcss_disable_vblank(struct drm_crtc *crtc) +{ + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + + disable_irq_nosync(dcss_crtc->irq); + + dcss_dtg_vblank_irq_enable(dcss->dtg, false); + + if (dcss_crtc->disable_ctxld_kick_irq) + dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, false); +} + +static const struct drm_crtc_funcs dcss_crtc_funcs = { + .set_config = drm_atomic_helper_set_config, + .destroy = drm_crtc_cleanup, + .page_flip = drm_atomic_helper_page_flip, + .reset = drm_atomic_helper_crtc_reset, + .atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_crtc_destroy_state, + .enable_vblank = dcss_enable_vblank, + .disable_vblank = dcss_disable_vblank, +}; + +static void dcss_crtc_atomic_begin(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + drm_crtc_vblank_on(crtc); +} + +static void dcss_crtc_atomic_flush(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + + spin_lock_irq(&crtc->dev->event_lock); + if (crtc->state->event) { + WARN_ON(drm_crtc_vblank_get(crtc)); + drm_crtc_arm_vblank_event(crtc, crtc->state->event); + crtc->state->event = NULL; + } + spin_unlock_irq(&crtc->dev->event_lock); + + if (dcss_dtg_is_enabled(dcss->dtg)) + dcss_ctxld_enable(dcss->ctxld); +} + +static void dcss_crtc_atomic_enable(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, + crtc); + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + struct drm_display_mode *mode = &crtc->state->adjusted_mode; + struct drm_display_mode *old_mode = &old_crtc_state->adjusted_mode; + struct videomode vm; + + drm_display_mode_to_videomode(mode, &vm); + + pm_runtime_get_sync(dcss->dev); + + vm.pixelclock = mode->crtc_clock * 1000; + + dcss_ss_subsam_set(dcss->ss); + dcss_dtg_css_set(dcss->dtg); + + if (!drm_mode_equal(mode, old_mode) || !old_crtc_state->active) { + dcss_dtg_sync_set(dcss->dtg, &vm); + dcss_ss_sync_set(dcss->ss, &vm, + mode->flags & DRM_MODE_FLAG_PHSYNC, + mode->flags & DRM_MODE_FLAG_PVSYNC); + } + + dcss_enable_dtg_and_ss(dcss); + + dcss_ctxld_enable(dcss->ctxld); + + /* Allow CTXLD kick interrupt to be disabled when VBLANK is disabled. */ + dcss_crtc->disable_ctxld_kick_irq = true; +} + +static void dcss_crtc_atomic_disable(struct drm_crtc *crtc, + struct drm_atomic_state *state) +{ + struct drm_crtc_state *old_crtc_state = drm_atomic_get_old_crtc_state(state, + crtc); + struct dcss_crtc *dcss_crtc = container_of(crtc, struct dcss_crtc, + base); + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + struct drm_display_mode *mode = &crtc->state->adjusted_mode; + struct drm_display_mode *old_mode = &old_crtc_state->adjusted_mode; + + drm_atomic_helper_disable_planes_on_crtc(old_crtc_state, false); + + 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); + + dcss_dtg_ctxld_kick_irq_enable(dcss->dtg, true); + + reinit_completion(&dcss->disable_completion); + + dcss_disable_dtg_and_ss(dcss); + + dcss_ctxld_enable(dcss->ctxld); + + if (!drm_mode_equal(mode, old_mode) || !crtc->state->active) + if (!wait_for_completion_timeout(&dcss->disable_completion, + msecs_to_jiffies(100))) + dev_err(dcss->dev, "Shutting off DTG timed out.\n"); + + /* + * Do not shut off CTXLD kick interrupt when shutting VBLANK off. It + * will be needed to commit the last changes, before going to suspend. + */ + dcss_crtc->disable_ctxld_kick_irq = false; + + drm_crtc_vblank_off(crtc); + + pm_runtime_mark_last_busy(dcss->dev); + pm_runtime_put_autosuspend(dcss->dev); +} + +static const struct drm_crtc_helper_funcs dcss_helper_funcs = { + .atomic_begin = dcss_crtc_atomic_begin, + .atomic_flush = dcss_crtc_atomic_flush, + .atomic_enable = dcss_crtc_atomic_enable, + .atomic_disable = dcss_crtc_atomic_disable, +}; + +static irqreturn_t dcss_crtc_irq_handler(int irq, void *dev_id) +{ + struct dcss_crtc *dcss_crtc = dev_id; + struct dcss_dev *dcss = dcss_crtc->base.dev->dev_private; + + if (!dcss_dtg_vblank_irq_valid(dcss->dtg)) + return IRQ_NONE; + + if (dcss_ctxld_is_flushed(dcss->ctxld)) + drm_crtc_handle_vblank(&dcss_crtc->base); + + dcss_dtg_vblank_irq_clear(dcss->dtg); + + return IRQ_HANDLED; +} + +int dcss_crtc_init(struct dcss_crtc *crtc, struct drm_device *drm) +{ + struct dcss_dev *dcss = drm->dev_private; + struct platform_device *pdev = to_platform_device(dcss->dev); + int ret; + + crtc->plane[0] = dcss_plane_init(drm, drm_crtc_mask(&crtc->base), + DRM_PLANE_TYPE_PRIMARY, 0); + if (IS_ERR(crtc->plane[0])) + return PTR_ERR(crtc->plane[0]); + + crtc->base.port = dcss->of_port; + + drm_crtc_helper_add(&crtc->base, &dcss_helper_funcs); + ret = drm_crtc_init_with_planes(drm, &crtc->base, &crtc->plane[0]->base, + NULL, &dcss_crtc_funcs, NULL); + if (ret) { + dev_err(dcss->dev, "failed to init crtc\n"); + return ret; + } + + crtc->irq = platform_get_irq_byname(pdev, "vblank"); + if (crtc->irq < 0) + return crtc->irq; + + ret = request_irq(crtc->irq, dcss_crtc_irq_handler, + 0, "dcss_drm", crtc); + if (ret) { + dev_err(dcss->dev, "irq request failed with %d.\n", ret); + return ret; + } + + disable_irq(crtc->irq); + + return 0; +} + +void dcss_crtc_deinit(struct dcss_crtc *crtc, struct drm_device *drm) +{ + free_irq(crtc->irq, crtc); +} |