[PATCH 5/5] WIP: allow framebuffer in GART memory as well

[Christian König]

From: Christian König <christian.koenig at amd.com>

On CZ and newer APUs we can pin the fb into GART as well as VRAM.

TODO: Somehow only results in first 8x8 tile to be repeated over and over
      again on the screen.

Signed-off-by: Christian König <christian.koenig at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.c       | 13 ++++++++++++-
 drivers/gpu/drm/amd/amdgpu/amdgpu_display.h       |  1 +
 drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c            | 10 ++++++----
 drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 13 ++++++++++---
 4 files changed, 29 insertions(+), 8 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
index 6744e0c..bb31964 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.c
@@ -29,6 +29,7 @@
 #include "amdgpu_i2c.h"
 #include "atom.h"
 #include "amdgpu_connectors.h"
+#include "amdgpu_display.h"
 #include <asm/div64.h>
 
 #include <linux/pm_runtime.h>
@@ -188,7 +189,7 @@ int amdgpu_crtc_page_flip_target(struct drm_crtc *crtc,
 		goto cleanup;
 	}
 
-	r = amdgpu_bo_pin(new_abo, AMDGPU_GEM_DOMAIN_VRAM, &base);
+	r = amdgpu_bo_pin(new_abo, amdgpu_framebuffer_domains(adev), &base);
 	if (unlikely(r != 0)) {
 		DRM_ERROR("failed to pin new abo buffer before flip\n");
 		goto unreserve;
@@ -501,6 +502,16 @@ static const struct drm_framebuffer_funcs amdgpu_fb_funcs = {
 	.create_handle = amdgpu_user_framebuffer_create_handle,
 };
 
+uint32_t amdgpu_framebuffer_domains(struct amdgpu_device *adev)
+{
+	uint32_t domain = AMDGPU_GEM_DOMAIN_VRAM;
+
+	if (adev->asic_type >= CHIP_CARRIZO && adev->flags & AMD_IS_APU)
+		domain = AMDGPU_GEM_DOMAIN_GTT;
+
+	return domain;
+}
+
 int
 amdgpu_framebuffer_init(struct drm_device *dev,
 			struct amdgpu_framebuffer *rfb,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h
index 11ae4ab..f241949 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_display.h
@@ -23,6 +23,7 @@
 #ifndef __AMDGPU_DISPLAY_H__
 #define __AMDGPU_DISPLAY_H__
 
+uint32_t amdgpu_framebuffer_domains(struct amdgpu_device *adev);
 struct drm_framebuffer *
 amdgpu_user_framebuffer_create(struct drm_device *dev,
 			       struct drm_file *file_priv,
diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
index 90fa8e8..9be3228 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_fb.c
@@ -38,6 +38,8 @@
 
 #include <linux/vga_switcheroo.h>
 
+#include "amdgpu_display.h"
+
 /* object hierarchy -
    this contains a helper + a amdgpu fb
    the helper contains a pointer to amdgpu framebuffer baseclass.
@@ -124,7 +126,7 @@ static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 	struct drm_gem_object *gobj = NULL;
 	struct amdgpu_bo *abo = NULL;
 	bool fb_tiled = false; /* useful for testing */
-	u32 tiling_flags = 0;
+	u32 tiling_flags = 0, domain;
 	int ret;
 	int aligned_size, size;
 	int height = mode_cmd->height;
@@ -135,12 +137,12 @@ static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 	/* need to align pitch with crtc limits */
 	mode_cmd->pitches[0] = amdgpu_align_pitch(adev, mode_cmd->width, cpp,
 						  fb_tiled);
+	domain = amdgpu_framebuffer_domains(adev);
 
 	height = ALIGN(mode_cmd->height, 8);
 	size = mode_cmd->pitches[0] * height;
 	aligned_size = ALIGN(size, PAGE_SIZE);
-	ret = amdgpu_gem_object_create(adev, aligned_size, 0,
-				       AMDGPU_GEM_DOMAIN_VRAM,
+	ret = amdgpu_gem_object_create(adev, aligned_size, 0, domain,
 				       AMDGPU_GEM_CREATE_CPU_ACCESS_REQUIRED |
 				       AMDGPU_GEM_CREATE_VRAM_CONTIGUOUS |
 				       AMDGPU_GEM_CREATE_VRAM_CLEARED,
@@ -166,7 +168,7 @@ static int amdgpufb_create_pinned_object(struct amdgpu_fbdev *rfbdev,
 	}
 
 
-	ret = amdgpu_bo_pin(abo, AMDGPU_GEM_DOMAIN_VRAM, NULL);
+	ret = amdgpu_bo_pin(abo, domain, NULL);
 	if (ret) {
 		amdgpu_bo_unreserve(abo);
 		goto out_unref;
diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
index 5731167..3b7194d 100644
--- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
+++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
@@ -2985,10 +2985,12 @@ static int dm_plane_helper_prepare_fb(struct drm_plane *plane,
 {
 	struct amdgpu_framebuffer *afb;
 	struct drm_gem_object *obj;
+	struct amdgpu_device *adev;
 	struct amdgpu_bo *rbo;
-	int r;
 	struct dm_plane_state *dm_plane_state_new, *dm_plane_state_old;
 	unsigned int awidth;
+	uint32_t domain;
+	int r;
 
 	dm_plane_state_old = to_dm_plane_state(plane->state);
 	dm_plane_state_new = to_dm_plane_state(new_state);
@@ -3002,17 +3004,22 @@ static int dm_plane_helper_prepare_fb(struct drm_plane *plane,
 
 	obj = afb->obj;
 	rbo = gem_to_amdgpu_bo(obj);
+	adev = amdgpu_ttm_adev(rbo->tbo.bdev);
 	r = amdgpu_bo_reserve(rbo, false);
 	if (unlikely(r != 0))
 		return r;
 
-	r = amdgpu_bo_pin(rbo, AMDGPU_GEM_DOMAIN_VRAM, &afb->address);
 
+	if (plane->type != DRM_PLANE_TYPE_CURSOR)
+		domain = amdgpu_framebuffer_domains(adev);
+	else
+		domain = AMDGPU_GEM_DOMAIN_VRAM;
 
+	r = amdgpu_bo_pin(rbo, domain, &afb->address);
 	amdgpu_bo_unreserve(rbo);
 
 	if (unlikely(r != 0)) {
-		DRM_ERROR("Failed to pin framebuffer\n");
+		DRM_ERROR("Failed to pin framebuffer (%d)\n", r);
 		return r;
 	}
 
-- 
2.7.4