Am 18.08.22 um 11:45 schrieb oushixiong:
This patch adds ast specific codes for DRM prime feature, this is to
allow for offloading of rending in one direction and outputs in other.
v1->v2:
- Fix the comment.
Signed-off-by: oushixiong <oushixi...@kylinos.cn>
---
drivers/gpu/drm/ast/ast_drv.c | 22 ++++++
drivers/gpu/drm/ast/ast_mode.c | 125 ++++++++++++++++++++++++++++++++-
2 files changed, 146 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/ast/ast_drv.c b/drivers/gpu/drm/ast/ast_drv.c
index 7465c4f0156a..6c1f75174368 100644
--- a/drivers/gpu/drm/ast/ast_drv.c
+++ b/drivers/gpu/drm/ast/ast_drv.c
@@ -28,6 +28,7 @@
#include <linux/module.h>
#include <linux/pci.h>
+#include <linux/dma-buf.h>
#include <drm/drm_aperture.h>
#include <drm/drm_atomic_helper.h>
@@ -50,6 +51,23 @@ module_param_named(modeset, ast_modeset, int, 0400);
DEFINE_DRM_GEM_FOPS(ast_fops);
+static struct drm_gem_object *ast_gem_prime_import_sg_table(struct drm_device *dev,
+ struct dma_buf_attachment *attach,
+ struct sg_table *sg)
+{
+ struct drm_gem_vram_object *gbo;
+ struct dma_resv *resv = attach->dmabuf->resv;
+
+ ww_mutex_lock(&resv->lock, NULL);
+ gbo = drm_gem_vram_create(dev, attach->dmabuf->size, 0);
+ ww_mutex_unlock(&resv->lock);
+
+ if (IS_ERR(gbo))
+ return NULL;
Well where do you use the sg_table here?
Christian.
+
+ return &gbo->bo.base;
+}
+
static const struct drm_driver ast_driver = {
.driver_features = DRIVER_ATOMIC |
DRIVER_GEM |
@@ -63,6 +81,10 @@ static const struct drm_driver ast_driver = {
.minor = DRIVER_MINOR,
.patchlevel = DRIVER_PATCHLEVEL,
+ .prime_handle_to_fd = drm_gem_prime_handle_to_fd,
+ .prime_fd_to_handle = drm_gem_prime_fd_to_handle,
+ .gem_prime_import_sg_table = ast_gem_prime_import_sg_table,
+
DRM_GEM_VRAM_DRIVER
};
diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index 45b56b39ad47..ebe732705e34 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -48,6 +48,8 @@
#include "ast_drv.h"
#include "ast_tables.h"
+MODULE_IMPORT_NS(DMA_BUF);
+
static inline void ast_load_palette_index(struct ast_private *ast,
u8 index, u8 red, u8 green,
u8 blue)
@@ -1535,8 +1537,129 @@ static const struct drm_mode_config_helper_funcs
ast_mode_config_helper_funcs =
.atomic_commit_tail = drm_atomic_helper_commit_tail_rpm,
};
+static int ast_handle_damage(struct drm_framebuffer *fb, int x, int y,
+ int width, int height)
+{
+ struct drm_gem_vram_object *dst_bo = NULL;
+ void *dst = NULL;
+ int ret = 0, i;
+ unsigned long offset = 0;
+ bool unmap = false;
+ unsigned int bytesPerPixel;
+ struct iosys_map map;
+ struct iosys_map dmabuf_map;
+
+ bytesPerPixel = fb->format->cpp[0];
+
+ if (!fb->obj[0]->import_attach)
+ return -EINVAL;
+
+ if (!fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr) {
+ ret = dma_buf_vmap(fb->obj[0]->import_attach->dmabuf,
&dmabuf_map);
+ if (ret)
+ return 0;
+ } else
+ dmabuf_map.vaddr =
fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr;
+
+ dst_bo = drm_gem_vram_of_gem(fb->obj[0]);
+
+ ret = drm_gem_vram_pin(dst_bo, 0);
+ if (ret) {
+ DRM_ERROR("ast_bo_pin failed\n");
+ goto error;
+ }
+
+ if (!dst_bo->map.vaddr) {
+ ret = drm_gem_vram_vmap(dst_bo, &map);
+ if (ret) {
+ DRM_ERROR("failed to vmap fbcon\n");
+ drm_gem_vram_unpin(dst_bo);
+ goto error;
+ }
+ unmap = true;
+ }
+ dst = dst_bo->map.vaddr;
+
+ for (i = y; i < y + height; i++) {
+ offset = i * fb->pitches[0] + (x * bytesPerPixel);
+ memcpy_toio(dst + offset, dmabuf_map.vaddr + offset,
+ width * bytesPerPixel);
+ }
+
+ if (unmap)
+ drm_gem_vram_vunmap(dst_bo, &map);
+
+ drm_gem_vram_unpin(dst_bo);
+error:
+ return 0;
+}
+
+
+static int ast_user_framebuffer_dirty(struct drm_framebuffer *fb,
+ struct drm_file *file,
+ unsigned int flags,
+ unsigned int color,
+ struct drm_clip_rect *clips,
+ unsigned int num_clips)
+{
+ int i, ret = 0;
+
+ drm_modeset_lock_all(fb->dev);
+ if (fb->obj[0]->import_attach) {
+ ret =
dma_buf_begin_cpu_access(fb->obj[0]->import_attach->dmabuf,
+ DMA_FROM_DEVICE);
+ if (ret)
+ goto unlock;
+ }
+
+ for (i = 0; i < num_clips; i++) {
+ ret = ast_handle_damage(fb, clips[i].x1, clips[i].y1,
+ clips[i].x2 - clips[i].x1, clips[i].y2 -
clips[i].y1);
+ if (ret)
+ break;
+ }
+
+ if (fb->obj[0]->import_attach) {
+ dma_buf_end_cpu_access(fb->obj[0]->import_attach->dmabuf,
+ DMA_FROM_DEVICE);
+ }
+
+unlock:
+ drm_modeset_unlock_all(fb->dev);
+
+ return ret;
+}
+
+static void ast_user_framebuffer_destroy(struct drm_framebuffer *fb)
+{
+ struct iosys_map dmabuf_map;
+
+ if (fb->obj[0]->import_attach) {
+ dmabuf_map.vaddr =
fb->obj[0]->import_attach->dmabuf->vmap_ptr.vaddr;
+ if (dmabuf_map.vaddr)
+ dma_buf_vunmap(fb->obj[0]->import_attach->dmabuf,
+ &dmabuf_map);
+ }
+
+ drm_gem_fb_destroy(fb);
+}
+
+static const struct drm_framebuffer_funcs ast_gem_fb_funcs_dirtyfb = {
+ .destroy = ast_user_framebuffer_destroy,
+ .create_handle = drm_gem_fb_create_handle,
+ .dirty = ast_user_framebuffer_dirty,
+};
+
+static struct drm_framebuffer *
+ast_gem_fb_create_with_dirty(struct drm_device *dev, struct drm_file *file,
+ const struct drm_mode_fb_cmd2 *mode_cmd)
+{
+ return drm_gem_fb_create_with_funcs(dev, file, mode_cmd,
+ &ast_gem_fb_funcs_dirtyfb);
+}
+
static const struct drm_mode_config_funcs ast_mode_config_funcs = {
- .fb_create = drm_gem_fb_create,
+ .fb_create = ast_gem_fb_create_with_dirty,
.mode_valid = drm_vram_helper_mode_valid,
.atomic_check = drm_atomic_helper_check,
.atomic_commit = drm_atomic_helper_commit,
