diff options
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_crtc.c | 11 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_crtc.h | 7 | ||||
| -rw-r--r-- | drivers/gpu/drm/exynos/exynos_drm_drv.h | 3 | ||||
| -rw-r--r-- | include/drm/drm_mipi_dsi.h | 8 |
4 files changed, 29 insertions, 0 deletions
diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.c b/drivers/gpu/drm/exynos/exynos_drm_crtc.c index 1c7dd47936a..22a8d1b8f64 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.c +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.c @@ -614,3 +614,14 @@ void exynos_drm_crtc_complete_scanout(struct drm_framebuffer *fb) manager->ops->wait_for_vblank(manager); } } + +int exynos_drm_crtc_te_handler(struct drm_crtc *crtc) +{ + struct exynos_drm_manager *manager = to_exynos_crtc(crtc)->manager; + int ret = 0; + + if (manager->ops->te_handler) + ret = manager->ops->te_handler(manager); + + return ret; +} diff --git a/drivers/gpu/drm/exynos/exynos_drm_crtc.h b/drivers/gpu/drm/exynos/exynos_drm_crtc.h index c27b66cc5d2..eb78c16e52c 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_crtc.h +++ b/drivers/gpu/drm/exynos/exynos_drm_crtc.h @@ -32,4 +32,11 @@ void exynos_drm_crtc_plane_commit(struct drm_crtc *crtc, int zpos); void exynos_drm_crtc_plane_enable(struct drm_crtc *crtc, int zpos); void exynos_drm_crtc_plane_disable(struct drm_crtc *crtc, int zpos); +/* + * This function calls the crtc device(manager)'s te_handler() callback + * to trigger to transfer video image at the tearing effect synchronization + * signal. + */ +int exynos_drm_crtc_te_handler(struct drm_crtc *crtc); + #endif diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h index a8002cc4981..c37055c12b2 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h @@ -186,6 +186,8 @@ struct exynos_drm_display { * @win_commit: apply hardware specific overlay data to registers. * @win_enable: enable hardware specific overlay. * @win_disable: disable hardware specific overlay. + * @te_handler: trigger to transfer video image at the tearing effect + * synchronization signal if there is a page flip request. */ struct exynos_drm_manager; struct exynos_drm_manager_ops { @@ -207,6 +209,7 @@ struct exynos_drm_manager_ops { void (*win_commit)(struct exynos_drm_manager *mgr, int zpos); void (*win_enable)(struct exynos_drm_manager *mgr, int zpos); void (*win_disable)(struct exynos_drm_manager *mgr, int zpos); + int (*te_handler)(struct exynos_drm_manager *mgr); }; /* diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 7209df15a3c..f6d4c851c5b 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -49,6 +49,13 @@ struct mipi_dsi_msg { * @detach: detach DSI device from DSI host * @transfer: send and/or receive DSI packet, return number of received bytes, * or error + * @te_handler: call the crtc te_handler() callback from DSI host. + * The panel generates tearing effect synchronization signal + * between MCU and FB to display video images. + * And the display controller should trigger to transfer video + * image at this signal. + * So the panel receives the TE IRQ, then calls this handler + * to notify it to the display controller. */ struct mipi_dsi_host_ops { int (*attach)(struct mipi_dsi_host *host, @@ -57,6 +64,7 @@ struct mipi_dsi_host_ops { struct mipi_dsi_device *dsi); ssize_t (*transfer)(struct mipi_dsi_host *host, struct mipi_dsi_msg *msg); + int (*te_handler)(struct mipi_dsi_host *host); }; /** |