All the necessary support bits like .mode_set_base() and VBLANK are now available, so page-flipping case easily be implemented on top.
Signed-off-by: Thierry Reding thierry.reding@avionic-design.de --- drivers/gpu/drm/tegra/dc.c | 72 +++++++++++++++++++++++++++++++++++++++++++++ drivers/gpu/drm/tegra/drm.c | 9 ++++++ drivers/gpu/drm/tegra/drm.h | 5 ++++ 3 files changed, 86 insertions(+)
diff --git a/drivers/gpu/drm/tegra/dc.c b/drivers/gpu/drm/tegra/dc.c index 3aa7ccc..ce4e14a 100644 --- a/drivers/gpu/drm/tegra/dc.c +++ b/drivers/gpu/drm/tegra/dc.c @@ -161,7 +161,78 @@ void tegra_dc_disable_vblank(struct tegra_dc *dc) spin_unlock_irqrestore(&dc->lock, flags); }
+static void tegra_dc_finish_page_flip(struct tegra_dc *dc) +{ + struct drm_pending_vblank_event *event; + struct drm_device *drm = dc->base.dev; + unsigned long flags; + struct timeval now; + + spin_lock_irqsave(&drm->event_lock, flags); + event = dc->event; + dc->event = NULL; + spin_unlock_irqrestore(&drm->event_lock, flags); + + if (!event) + return; + + event->event.sequence = drm_vblank_count_and_time(drm, dc->pipe, &now); + event->event.tv_sec = now.tv_sec; + event->event.tv_usec = now.tv_usec; + + spin_lock_irqsave(&drm->event_lock, flags); + list_add_tail(&event->base.link, &event->base.file_priv->event_list); + wake_up_interruptible(&event->base.file_priv->event_wait); + spin_unlock_irqrestore(&drm->event_lock, flags); + + drm_vblank_put(drm, dc->pipe); +} + +void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, struct drm_file *file) +{ + struct tegra_dc *dc = to_tegra_dc(crtc); + struct drm_device *drm = crtc->dev; + unsigned long flags; + + spin_lock_irqsave(&drm->event_lock, flags); + + if (dc->event && dc->event->base.file_priv == file) { + dc->event->base.destroy(&dc->event->base); + drm_vblank_put(drm, dc->pipe); + dc->event = NULL; + } + + spin_unlock_irqrestore(&drm->event_lock, flags); +} + +static int tegra_dc_page_flip(struct drm_crtc *crtc, struct drm_framebuffer *fb, + struct drm_pending_vblank_event *event) +{ + struct tegra_framebuffer *newfb = to_tegra_fb(fb); + struct tegra_dc *dc = to_tegra_dc(crtc); + struct drm_device *drm = crtc->dev; + unsigned long flags; + + if (dc->event) + return -EBUSY; + + tegra_dc_set_base(dc, 0, 0, newfb); + + if (event) { + event->pipe = dc->pipe; + + spin_lock_irqsave(&drm->event_lock, flags); + dc->event = event; + spin_unlock_irqrestore(&drm->event_lock, flags); + + drm_vblank_get(drm, dc->pipe); + } + + return 0; +} + static const struct drm_crtc_funcs tegra_crtc_funcs = { + .page_flip = tegra_dc_page_flip, .set_config = drm_crtc_helper_set_config, .destroy = drm_crtc_cleanup, }; @@ -556,6 +627,7 @@ static irqreturn_t tegra_dc_irq(int irq, void *data) dev_dbg(dc->dev, "%s(): vertical blank\n", __func__); */ drm_handle_vblank(dc->base.dev, dc->pipe); + tegra_dc_finish_page_flip(dc); }
if (status & (WIN_A_UF_INT | WIN_B_UF_INT | WIN_C_UF_INT)) { diff --git a/drivers/gpu/drm/tegra/drm.c b/drivers/gpu/drm/tegra/drm.c index 62f8121..7bab784 100644 --- a/drivers/gpu/drm/tegra/drm.c +++ b/drivers/gpu/drm/tegra/drm.c @@ -129,11 +129,20 @@ static void tegra_drm_disable_vblank(struct drm_device *drm, int pipe) tegra_dc_disable_vblank(dc); }
+static void tegra_drm_preclose(struct drm_device *drm, struct drm_file *file) +{ + struct drm_crtc *crtc; + + list_for_each_entry(crtc, &drm->mode_config.crtc_list, head) + tegra_dc_cancel_page_flip(crtc, file); +} + struct drm_driver tegra_drm_driver = { .driver_features = DRIVER_BUS_PLATFORM | DRIVER_MODESET | DRIVER_GEM, .load = tegra_drm_load, .unload = tegra_drm_unload, .open = tegra_drm_open, + .preclose = tegra_drm_preclose, .lastclose = tegra_drm_lastclose,
.get_vblank_counter = drm_vblank_count, diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h index ca742b2..1f1cb37 100644 --- a/drivers/gpu/drm/tegra/drm.h +++ b/drivers/gpu/drm/tegra/drm.h @@ -100,6 +100,9 @@ struct tegra_dc { struct drm_info_list *debugfs_files; struct drm_minor *minor; struct dentry *debugfs; + + /* page-flip handling */ + struct drm_pending_vblank_event *event; };
static inline struct tegra_dc *host1x_client_to_dc(struct host1x_client *client) @@ -149,6 +152,8 @@ extern int tegra_dc_setup_window(struct tegra_dc *dc, unsigned int index, const struct tegra_dc_window *window); extern void tegra_dc_enable_vblank(struct tegra_dc *dc); extern void tegra_dc_disable_vblank(struct tegra_dc *dc); +extern void tegra_dc_cancel_page_flip(struct drm_crtc *crtc, + struct drm_file *file);
struct tegra_output_ops { int (*enable)(struct tegra_output *output);