diff options
Diffstat (limited to 'drivers/gpu/drm/tegra/drm.c')
| -rw-r--r-- | drivers/gpu/drm/tegra/drm.c | 140 |
1 files changed, 135 insertions, 5 deletions
diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index d4f827593dfa..7dd328d77996 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -10,6 +10,9 @@ #include <linux/host1x.h> #include <linux/iommu.h> +#include <drm/drm_atomic.h> +#include <drm/drm_atomic_helper.h> + #include "drm.h" #include "gem.h" @@ -24,6 +27,92 @@ struct tegra_drm_file { struct list_head contexts; }; +static void tegra_atomic_schedule(struct tegra_drm *tegra, + struct drm_atomic_state *state) +{ + tegra->commit.state = state; + schedule_work(&tegra->commit.work); +} + +static void tegra_atomic_complete(struct tegra_drm *tegra, + struct drm_atomic_state *state) +{ + struct drm_device *drm = tegra->drm; + + /* + * Everything below can be run asynchronously without the need to grab + * any modeset locks at all under one condition: It must be guaranteed + * that the asynchronous work has either been cancelled (if the driver + * supports it, which at least requires that the framebuffers get + * cleaned up with drm_atomic_helper_cleanup_planes()) or completed + * before the new state gets committed on the software side with + * drm_atomic_helper_swap_state(). + * + * This scheme allows new atomic state updates to be prepared and + * checked in parallel to the asynchronous completion of the previous + * update. Which is important since compositors need to figure out the + * composition of the next frame right after having submitted the + * current layout. + */ + + drm_atomic_helper_commit_pre_planes(drm, state); + drm_atomic_helper_commit_planes(drm, state); + drm_atomic_helper_commit_post_planes(drm, state); + + drm_atomic_helper_wait_for_vblanks(drm, state); + + drm_atomic_helper_cleanup_planes(drm, state); + drm_atomic_state_free(state); +} + +static void tegra_atomic_work(struct work_struct *work) +{ + struct tegra_drm *tegra = container_of(work, struct tegra_drm, + commit.work); + + tegra_atomic_complete(tegra, tegra->commit.state); +} + +static int tegra_atomic_commit(struct drm_device *drm, + struct drm_atomic_state *state, bool async) +{ + struct tegra_drm *tegra = drm->dev_private; + int err; + + err = drm_atomic_helper_prepare_planes(drm, state); + if (err) + return err; + + /* serialize outstanding asynchronous commits */ + mutex_lock(&tegra->commit.lock); + flush_work(&tegra->commit.work); + + /* + * This is the point of no return - everything below never fails except + * when the hw goes bonghits. Which means we can commit the new state on + * the software side now. + */ + + drm_atomic_helper_swap_state(drm, state); + + if (async) + tegra_atomic_schedule(tegra, state); + else + tegra_atomic_complete(tegra, state); + + mutex_unlock(&tegra->commit.lock); + return 0; +} + +static const struct drm_mode_config_funcs tegra_drm_mode_funcs = { + .fb_create = tegra_fb_create, +#ifdef CONFIG_DRM_TEGRA_FBDEV + .output_poll_changed = tegra_fb_output_poll_changed, +#endif + .atomic_check = drm_atomic_helper_check, + .atomic_commit = tegra_atomic_commit, +}; + static int tegra_drm_load(struct drm_device *drm, unsigned long flags) { struct host1x_device *device = to_host1x_device(drm->dev); @@ -36,8 +125,8 @@ static int tegra_drm_load(struct drm_device *drm, unsigned long flags) if (iommu_present(&platform_bus_type)) { tegra->domain = iommu_domain_alloc(&platform_bus_type); - if (IS_ERR(tegra->domain)) { - err = PTR_ERR(tegra->domain); + if (!tegra->domain) { + err = -ENOMEM; goto free; } @@ -47,11 +136,23 @@ static int tegra_drm_load(struct drm_device *drm, unsigned long flags) mutex_init(&tegra->clients_lock); INIT_LIST_HEAD(&tegra->clients); + + mutex_init(&tegra->commit.lock); + INIT_WORK(&tegra->commit.work, tegra_atomic_work); + drm->dev_private = tegra; tegra->drm = drm; drm_mode_config_init(drm); + drm->mode_config.min_width = 0; + drm->mode_config.min_height = 0; + + drm->mode_config.max_width = 4096; + drm->mode_config.max_height = 4096; + + drm->mode_config.funcs = &tegra_drm_mode_funcs; + err = tegra_drm_fb_prepare(drm); if (err < 0) goto config; @@ -62,6 +163,8 @@ static int tegra_drm_load(struct drm_device *drm, unsigned long flags) if (err < 0) goto fbdev; + drm_mode_config_reset(drm); + /* * We don't use the drm_irq_install() helpers provided by the DRM * core, so we need to set this manually in order to allow the @@ -106,8 +209,8 @@ static int tegra_drm_unload(struct drm_device *drm) drm_kms_helper_poll_fini(drm); tegra_drm_fb_exit(drm); - drm_vblank_cleanup(drm); drm_mode_config_cleanup(drm); + drm_vblank_cleanup(drm); err = host1x_device_exit(device); if (err < 0) @@ -190,7 +293,7 @@ static int host1x_reloc_copy_from_user(struct host1x_reloc *dest, if (err < 0) return err; - err = get_user(dest->target.offset, &src->cmdbuf.offset); + err = get_user(dest->target.offset, &src->target.offset); if (err < 0) return err; @@ -893,6 +996,30 @@ static int host1x_drm_remove(struct host1x_device *dev) return 0; } +#ifdef CONFIG_PM_SLEEP +static int host1x_drm_suspend(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + + drm_kms_helper_poll_disable(drm); + + return 0; +} + +static int host1x_drm_resume(struct device *dev) +{ + struct drm_device *drm = dev_get_drvdata(dev); + + drm_kms_helper_poll_enable(drm); + + return 0; +} +#endif + +static const struct dev_pm_ops host1x_drm_pm_ops = { + SET_SYSTEM_SLEEP_PM_OPS(host1x_drm_suspend, host1x_drm_resume) +}; + static const struct of_device_id host1x_drm_subdevs[] = { { .compatible = "nvidia,tegra20-dc", }, { .compatible = "nvidia,tegra20-hdmi", }, @@ -912,7 +1039,10 @@ static const struct of_device_id host1x_drm_subdevs[] = { }; static struct host1x_driver host1x_drm_driver = { - .name = "drm", + .driver = { + .name = "drm", + .pm = &host1x_drm_pm_ops, + }, .probe = host1x_drm_probe, .remove = host1x_drm_remove, .subdevs = host1x_drm_subdevs, |
