Some hardware modules, like FIMC in Exynos4 series are shared between V4L2 (camera support) and DRM (memory-to-memory processing) subsystems. This patch provides a simple check to let such drivers to be used in the driver components framework.
Signed-off-by: Marek Szyprowski m.szyprowski@samsung.com --- drivers/gpu/drm/exynos/exynos_drm_drv.c | 17 ++++++++++++++++- drivers/gpu/drm/exynos/exynos_drm_drv.h | 2 ++ 2 files changed, 18 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.c b/drivers/gpu/drm/exynos/exynos_drm_drv.c index 27242af103ea..6b46d7aab0c6 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.c +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.c @@ -228,6 +228,7 @@ struct exynos_drm_driver_info { #define DRM_COMPONENT_DRIVER BIT(0) /* supports component framework */ #define DRM_VIRTUAL_DEVICE BIT(1) /* create virtual platform device */ #define DRM_DMA_DEVICE BIT(2) /* can be used for dma allocations */ +#define DRM_SHARED_DEVICE BIT(3) /* devices shared with V4L2 subsystem */
#define DRV_PTR(drv, cond) (IS_ENABLED(cond) ? &drv : NULL)
@@ -279,6 +280,17 @@ struct exynos_drm_driver_info { } };
+int exynos_drm_check_shared_device(struct device *dev) +{ + /* + * Exynos DRM drivers handle only devices that support + * the LCD Writeback data path, rest is handled by V4L2 driver + */ + if (!of_property_read_bool(dev->of_node, "samsung,lcd-wb")) + return -ENODEV; + return 0; +} + static int compare_dev(struct device *dev, void *data) { return dev == (struct device *)data; @@ -300,7 +312,10 @@ static struct component_match *exynos_drm_match_add(struct device *dev) &info->driver->driver, (void *)platform_bus_type.match))) { put_device(p); - component_match_add(dev, &match, compare_dev, d); + + if (!(info->flags & DRM_SHARED_DEVICE) || + exynos_drm_check_shared_device(d) == 0) + component_match_add(dev, &match, compare_dev, d); p = d; } put_device(p); diff --git a/drivers/gpu/drm/exynos/exynos_drm_drv.h b/drivers/gpu/drm/exynos/exynos_drm_drv.h index 21f4271c012a..ac4ac73a6edb 100644 --- a/drivers/gpu/drm/exynos/exynos_drm_drv.h +++ b/drivers/gpu/drm/exynos/exynos_drm_drv.h @@ -274,6 +274,8 @@ static inline int exynos_dpi_bind(struct drm_device *dev, } #endif
+int exynos_drm_check_shared_device(struct device *dev); + int exynos_atomic_commit(struct drm_device *dev, struct drm_atomic_state *state, bool nonblock); int exynos_atomic_check(struct drm_device *dev, struct drm_atomic_state *state);