drm/vram-helpers: Add helpers for prepare_fb() and cleanup_fb() (6542ad89) · Commits · 戴 / test

drivers/gpu/drm/drm_gem_vram_helper.c

+126 −0

Original line number	Diff line number	Diff line
		@@ -3,10 +3,13 @@
		#include <drm/drm_debugfs.h>
		#include <drm/drm_device.h>
		#include <drm/drm_file.h>
		#include <drm/drm_framebuffer.h>
		#include <drm/drm_gem_ttm_helper.h>
		#include <drm/drm_gem_vram_helper.h>
		#include <drm/drm_mode.h>
		#include <drm/drm_plane.h>
		#include <drm/drm_prime.h>
		#include <drm/drm_simple_kms_helper.h>
		#include <drm/ttm/ttm_page_alloc.h>

		static const struct drm_gem_object_funcs drm_gem_vram_object_funcs;
		@@ -646,6 +649,129 @@ int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
		}
		EXPORT_SYMBOL(drm_gem_vram_driver_dumb_mmap_offset);

		/*
		* Helpers for struct drm_plane_helper_funcs
		*/

		/**
		* drm_gem_vram_plane_helper_prepare_fb() - \
		* Implements &struct drm_plane_helper_funcs.prepare_fb
		* @plane: a DRM plane
		* @new_state: the plane's new state
		*
		* During plane updates, this function pins the GEM VRAM
		* objects of the plane's new framebuffer to VRAM. Call
		* drm_gem_vram_plane_helper_cleanup_fb() to unpin them.
		*
		* Returns:
		* 0 on success, or
		* a negative errno code otherwise.
		*/
		int
		drm_gem_vram_plane_helper_prepare_fb(struct drm_plane *plane,
		struct drm_plane_state *new_state)
		{
		size_t i;
		struct drm_gem_vram_object *gbo;
		int ret;

		if (!new_state->fb)
		return 0;

		for (i = 0; i < ARRAY_SIZE(new_state->fb->obj); ++i) {
		if (!new_state->fb->obj[i])
		continue;
		gbo = drm_gem_vram_of_gem(new_state->fb->obj[i]);
		ret = drm_gem_vram_pin(gbo, DRM_GEM_VRAM_PL_FLAG_VRAM);
		if (ret)
		goto err_drm_gem_vram_unpin;
		}

		return 0;

		err_drm_gem_vram_unpin:
		while (i) {
		--i;
		gbo = drm_gem_vram_of_gem(new_state->fb->obj[i]);
		drm_gem_vram_unpin(gbo);
		}
		return ret;
		}
		EXPORT_SYMBOL(drm_gem_vram_plane_helper_prepare_fb);

		/**
		* drm_gem_vram_plane_helper_cleanup_fb() - \
		* Implements &struct drm_plane_helper_funcs.cleanup_fb
		* @plane: a DRM plane
		* @old_state: the plane's old state
		*
		* During plane updates, this function unpins the GEM VRAM
		* objects of the plane's old framebuffer from VRAM. Complements
		* drm_gem_vram_plane_helper_prepare_fb().
		*/
		void
		drm_gem_vram_plane_helper_cleanup_fb(struct drm_plane *plane,
		struct drm_plane_state *old_state)
		{
		size_t i;
		struct drm_gem_vram_object *gbo;

		if (!old_state->fb)
		return;

		for (i = 0; i < ARRAY_SIZE(old_state->fb->obj); ++i) {
		if (!old_state->fb->obj[i])
		continue;
		gbo = drm_gem_vram_of_gem(old_state->fb->obj[i]);
		drm_gem_vram_unpin(gbo);
		}
		}
		EXPORT_SYMBOL(drm_gem_vram_plane_helper_cleanup_fb);

		/*
		* Helpers for struct drm_simple_display_pipe_funcs
		*/

		/**
		* drm_gem_vram_simple_display_pipe_prepare_fb() - \
		* Implements &struct drm_simple_display_pipe_funcs.prepare_fb
		* @pipe: a simple display pipe
		* @new_state: the plane's new state
		*
		* During plane updates, this function pins the GEM VRAM
		* objects of the plane's new framebuffer to VRAM. Call
		* drm_gem_vram_simple_display_pipe_cleanup_fb() to unpin them.
		*
		* Returns:
		* 0 on success, or
		* a negative errno code otherwise.
		*/
		int drm_gem_vram_simple_display_pipe_prepare_fb(
		struct drm_simple_display_pipe *pipe,
		struct drm_plane_state *new_state)
		{
		return drm_gem_vram_plane_helper_prepare_fb(&pipe->plane, new_state);
		}
		EXPORT_SYMBOL(drm_gem_vram_simple_display_pipe_prepare_fb);

		/**
		* drm_gem_vram_simple_display_pipe_cleanup_fb() - \
		* Implements &struct drm_simple_display_pipe_funcs.cleanup_fb
		* @pipe: a simple display pipe
		* @old_state: the plane's old state
		*
		* During plane updates, this function unpins the GEM VRAM
		* objects of the plane's old framebuffer from VRAM. Complements
		* drm_gem_vram_simple_display_pipe_prepare_fb().
		*/
		void drm_gem_vram_simple_display_pipe_cleanup_fb(
		struct drm_simple_display_pipe *pipe,
		struct drm_plane_state *old_state)
		{
		drm_gem_vram_plane_helper_cleanup_fb(&pipe->plane, old_state);
		}
		EXPORT_SYMBOL(drm_gem_vram_simple_display_pipe_cleanup_fb);

		/*
		* PRIME helpers
		*/

include/drm/drm_gem_vram_helper.h

+25 −0

Original line number	Diff line number	Diff line
		@@ -13,6 +13,9 @@
		#include <linux/kernel.h> /* for container_of() */

		struct drm_mode_create_dumb;
		struct drm_plane;
		struct drm_plane_state;
		struct drm_simple_display_pipe;
		struct drm_vram_mm_funcs;
		struct filp;
		struct vm_area_struct;
		@@ -124,6 +127,28 @@ int drm_gem_vram_driver_dumb_mmap_offset(struct drm_file *file,
		struct drm_device *dev,
		uint32_t handle, uint64_t *offset);

		/*
		* Helpers for struct drm_plane_helper_funcs
		*/
		int
		drm_gem_vram_plane_helper_prepare_fb(struct drm_plane *plane,
		struct drm_plane_state *new_state);
		void
		drm_gem_vram_plane_helper_cleanup_fb(struct drm_plane *plane,
		struct drm_plane_state *old_state);

		/*
		* Helpers for struct drm_simple_display_pipe_funcs
		*/

		int drm_gem_vram_simple_display_pipe_prepare_fb(
		struct drm_simple_display_pipe *pipe,
		struct drm_plane_state *new_state);

		void drm_gem_vram_simple_display_pipe_cleanup_fb(
		struct drm_simple_display_pipe *pipe,
		struct drm_plane_state *old_state);

		/**
		* define DRM_GEM_VRAM_DRIVER - default callback functions for \
		&struct drm_driver

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