Introduce a new live source flag for framebuffers. When a framebuffer is
created with that flag set, a live source is associated with the
framebuffer instead of buffer objects. The framebuffer can then be used
with a plane to connect it with the live source.
Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas at ideasonboard.com>
---
drivers/gpu/drm/drm_crtc.c | 123 +++++++++++++++++++++++++++++++++++---------
include/uapi/drm/drm_mode.h | 7 +++
2 files changed, 107 insertions(+), 23 deletions(-)
diff --git a/drivers/gpu/drm/drm_crtc.c b/drivers/gpu/drm/drm_crtc.c
index 1f71978b4f17..838fd5051a00 100644
--- a/drivers/gpu/drm/drm_crtc.c
+++ b/drivers/gpu/drm/drm_crtc.c
@@ -3408,31 +3408,13 @@ static int format_check(const struct drm_mode_fb_cmd2
*r)
}
}
-static int framebuffer_check(const struct drm_mode_fb_cmd2 *r)
+static int framebuffer_check_buffers(const struct drm_mode_fb_cmd2 *r,
+ int hsub, int vsub)
{
- int ret, hsub, vsub, num_planes, i;
+ int num_planes, i;
- ret = format_check(r);
- if (ret) {
- DRM_DEBUG_KMS("bad framebuffer format %s\n",
- drm_get_format_name(r->pixel_format));
- return ret;
- }
-
- hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
- vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
num_planes = drm_format_num_planes(r->pixel_format);
- if (r->width == 0 || r->width % hsub) {
- DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
- return -EINVAL;
- }
-
- if (r->height == 0 || r->height % vsub) {
- DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
- return -EINVAL;
- }
-
for (i = 0; i < num_planes; i++) {
unsigned int width = r->width / (i != 0 ? hsub : 1);
unsigned int height = r->height / (i != 0 ? vsub : 1);
@@ -3464,6 +3446,100 @@ static int framebuffer_check(const struct
drm_mode_fb_cmd2 *r)
return 0;
}
+static int framebuffer_check_sources(struct drm_device *dev,
+ const struct drm_mode_fb_cmd2 *r)
+{
+ struct drm_mode_object *obj;
+ struct drm_live_source *src;
+ unsigned int cpp;
+ unsigned int i;
+
+ /*
+ * Ensure that userspace has zeroed unused handles, pitches, offsets and
+ * modifiers to allow future API extensions.
+ */
+ if (r->offsets[0] || r->modifier[0])
+ return -EINVAL;
+
+ for (i = 1; i < ARRAY_SIZE(r->handles); ++i) {
+ if (r->handles[i] || r->pitches[i] ||
+ r->offsets[i] || r->modifier[i])
+ return -EINVAL;
+ }
+
+ /* Validate width, height and pitch. */
+ cpp = drm_format_plane_cpp(r->pixel_format, 0);
+
+ if ((uint64_t) r->width * cpp > UINT_MAX)
+ return -ERANGE;
+
+ if ((uint64_t) r->height * r->pitches[0] > UINT_MAX)
+ return -ERANGE;
+
+ if (r->pitches[0] != r->width * cpp) {
+ DRM_DEBUG_KMS("bad pitch %u for plane %d\n", r->pitches[0], i);
+ return -EINVAL;
+ }
+
+ /*
+ * Find the live source and check whether it supports the requested
+ * pixel format.
+ */
+
+ obj = drm_mode_object_find(dev, r->handles[0],
+ DRM_MODE_OBJECT_LIVE_SOURCE);
+ if (!obj) {
+ DRM_DEBUG_KMS("bad framebuffer source ID %u\n", r->handles[0]);
+ return -EINVAL;
+ }
+
+ src = obj_to_live_source(obj);
+
+ for (i = 0; i < src->format_count; i++) {
+ if (r->pixel_format == src->format_types[i])
+ break;
+ }
+
+ if (i == src->format_count) {
+ DRM_DEBUG_KMS("bad framebuffer pixel format 0x%08x for source
%u\n",
+ r->pixel_format, r->handles[0]);
+ return -EINVAL;
+ }
+
+ return 0;
+}
+
+static int framebuffer_check(struct drm_device *dev,
+ const struct drm_mode_fb_cmd2 *r)
+{
+ int ret, hsub, vsub;
+
+ ret = format_check(r);
+ if (ret) {
+ DRM_DEBUG_KMS("bad framebuffer format %s\n",
+ drm_get_format_name(r->pixel_format));
+ return ret;
+ }
+
+ hsub = drm_format_horz_chroma_subsampling(r->pixel_format);
+ vsub = drm_format_vert_chroma_subsampling(r->pixel_format);
+
+ if (r->width == 0 || r->width % hsub) {
+ DRM_DEBUG_KMS("bad framebuffer width %u\n", r->width);
+ return -EINVAL;
+ }
+
+ if (r->height == 0 || r->height % vsub) {
+ DRM_DEBUG_KMS("bad framebuffer height %u\n", r->height);
+ return -EINVAL;
+ }
+
+ if (r->flags & DRM_MODE_FB_LIVE_SOURCE)
+ return framebuffer_check_sources(dev, r);
+ else
+ return framebuffer_check_buffers(r, hsub, vsub);
+}
+
static struct drm_framebuffer *
internal_framebuffer_create(struct drm_device *dev,
struct drm_mode_fb_cmd2 *r,
@@ -3473,7 +3549,8 @@ internal_framebuffer_create(struct drm_device *dev,
struct drm_framebuffer *fb;
int ret;
- if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS)) {
+ if (r->flags & ~(DRM_MODE_FB_INTERLACED | DRM_MODE_FB_MODIFIERS |
+ DRM_MODE_FB_LIVE_SOURCE)) {
DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags);
return ERR_PTR(-EINVAL);
}
@@ -3495,7 +3572,7 @@ internal_framebuffer_create(struct drm_device *dev,
return ERR_PTR(-EINVAL);
}
- ret = framebuffer_check(r);
+ ret = framebuffer_check(dev, r);
if (ret)
return ERR_PTR(ret);
diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h
index e4d09f6f20eb..0cb73fb09d64 100644
--- a/include/uapi/drm/drm_mode.h
+++ b/include/uapi/drm/drm_mode.h
@@ -353,6 +353,7 @@ struct drm_mode_fb_cmd {
#define DRM_MODE_FB_INTERLACED (1<<0) /* for interlaced framebuffers */
#define DRM_MODE_FB_MODIFIERS (1<<1) /* enables ->modifer[] */
+#define DRM_MODE_FB_LIVE_SOURCE (1<<2) /* connected to a live source */
struct drm_mode_fb_cmd2 {
__u32 fb_id;
@@ -380,6 +381,12 @@ struct drm_mode_fb_cmd2 {
* Vendor specific modifier token. This allows, for example,
* different tiling/swizzling pattern on different planes.
* See discussion above of DRM_FORMAT_MOD_xxx.
+ *
+ * If the DRM_MODE_FB_LIVE_SOURCE flag is set the frame buffer input
+ * comes from a live source instead of from memory. The handles[0]
+ * field contains the ID of the connected live source object. All other
+ * handles and all pitches, offsets and modifiers are then ignored by
+ * the kernel and must be set to zero by applications.
*/
__u32 handles[4];
__u32 pitches[4]; /* pitch for each plane */
--
2.0.5
