drm/exynos: add wait_for_vblank callback interface. (b011941f) · Commits · 戴 / test

drivers/gpu/drm/exynos/exynos_drm_drv.h

+17 −0

Original line number	Diff line number	Diff line
		@@ -37,6 +37,20 @@
		#define MAX_FB_BUFFER 4
		#define DEFAULT_ZPOS -1

		#define _wait_for(COND, MS) ({ \
		unsigned long timeout__ = jiffies + msecs_to_jiffies(MS); \
		int ret__ = 0; \
		while (!(COND)) { \
		if (time_after(jiffies, timeout__)) { \
		ret__ = -ETIMEDOUT; \
		break; \
		} \
		} \
		ret__; \
		})

		#define wait_for(COND, MS) _wait_for(COND, MS)

		struct drm_device;
		struct exynos_drm_overlay;
		struct drm_connector;
		@@ -61,6 +75,8 @@ enum exynos_drm_output_type {
		* @commit: apply hardware specific overlay data to registers.
		* @enable: enable hardware specific overlay.
		* @disable: disable hardware specific overlay.
		* @wait_for_vblank: wait for vblank interrupt to make sure that
		* hardware overlay is disabled.
		*/
		struct exynos_drm_overlay_ops {
		void (mode_set)(struct device subdrv_dev,
		@@ -68,6 +84,7 @@ struct exynos_drm_overlay_ops {
		void (commit)(struct device subdrv_dev, int zpos);
		void (enable)(struct device subdrv_dev, int zpos);
		void (disable)(struct device subdrv_dev, int zpos);
		void (wait_for_vblank)(struct device subdrv_dev);
		};

		/*

+10 −0

Original line number	Diff line number	Diff line
		@@ -430,4 +430,14 @@ void exynos_drm_encoder_plane_disable(struct drm_encoder encoder, void data)

		if (overlay_ops && overlay_ops->disable)
		overlay_ops->disable(manager->dev, zpos);

		/*
		* wait for vblank interrupt
		* - this makes sure that hardware overlay is disabled to avoid
		* for the dma accesses to memory after gem buffer was released
		* because the setting for disabling the overlay will be updated
		* at vsync.
		*/
		if (overlay_ops->wait_for_vblank)
		overlay_ops->wait_for_vblank(manager->dev);
		}