drm/amdgpu: Enable scatter gather display support (6c8d74ca) · Commits · 戴 / test

Enables sg display if vram size <= THRESHOLD(256M); otherwise still use vram as display buffer. This patch fixed some potention issues introduced by change "allow framebuffer in GART memory as well" due to CZ/ST hardware limitation. v2: Change default setting to auto. v3: Move some logic from amdgpu_display_framebuffer_domains() to pin function, suggested by Christian. v4: Split into several patches. v5: Drop module parameter for now. Signed-off-by:

Samuel Li <Samuel.Li@amd.com> Reviewed-by:

Alex Deucher <alexander.deucher@amd.com> Signed-off-by:

Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu.h

+1 −0

Original line number	Diff line number	Diff line
		@@ -138,6 +138,7 @@ extern int amdgpu_si_support;
		extern int amdgpu_cik_support;
		#endif

		#define AMDGPU_SG_THRESHOLD (25610241024)
		#define AMDGPU_DEFAULT_GTT_SIZE_MB 3072ULL /* 3GB by default */
		#define AMDGPU_WAIT_IDLE_TIMEOUT_IN_MS 3000
		#define AMDGPU_MAX_USEC_TIMEOUT 100000 /* 100 ms */

drivers/gpu/drm/amd/amdgpu/amdgpu_object.c

+9 −0

Original line number	Diff line number	Diff line
		@@ -701,6 +701,15 @@ int amdgpu_bo_pin_restricted(struct amdgpu_bo *bo, u32 domain,
		return -EINVAL;
		}

		/* This assumes only APU display buffers are pinned with (VRAM\|GTT).
		* See function amdgpu_display_supported_domains()
		*/
		if (domain == (AMDGPU_GEM_DOMAIN_VRAM \| AMDGPU_GEM_DOMAIN_GTT)) {
		domain = AMDGPU_GEM_DOMAIN_VRAM;
		if (adev->gmc.real_vram_size <= AMDGPU_SG_THRESHOLD)
		domain = AMDGPU_GEM_DOMAIN_GTT;
		}

		if (bo->pin_count) {
		uint32_t mem_type = bo->tbo.mem.mem_type;

Admin message