On Mon, Sep 24, 2018 at 06:54:02PM +0000, Satish Kumar Nagireddy wrote:
This patch adds two new framebuffer flags, so that application can communicate alternate interlaced field information to DRM.
This patch also modifies the validation of framebuffer flags in DRM core framework. This is to ensure that application is setting the right framebuffer flags.
Signed-off-by: Satish Kumar Nagireddy satish.nagireddy.nagireddy@xilinx.com
Yeah as a draft this seems more reasonable. What we now need is fleshing out the full stack: - Full kernel-side implementation, including driver code. - igt testcase to validate all the corner-cases, e.g. how exactly does this interact with FB_INTERLACED? What happens if the client fails to supply the next field? - Userspace compositor/app driving this. See
https://dri.freedesktop.org/docs/drm/gpu/drm-uapi.html#open-source-userspace...
for full details.
Cheers, Daniel
drivers/gpu/drm/drm_framebuffer.c | 3 ++- include/uapi/drm/drm_mode.h | 2 ++ 2 files changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/drm_framebuffer.c b/drivers/gpu/drm/drm_framebuffer.c index 28a0108..d330256 100644 --- a/drivers/gpu/drm/drm_framebuffer.c +++ b/drivers/gpu/drm/drm_framebuffer.c @@ -241,7 +241,8 @@ drm_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_ALTERNATE_TOP | DRM_MODE_FB_ALTERNATE_BOTTOM)) { DRM_DEBUG_KMS("bad framebuffer flags 0x%08x\n", r->flags); return ERR_PTR(-EINVAL); }diff --git a/include/uapi/drm/drm_mode.h b/include/uapi/drm/drm_mode.h index ce7efe2..b857ed4 100644 --- a/include/uapi/drm/drm_mode.h +++ b/include/uapi/drm/drm_mode.h @@ -388,6 +388,8 @@ 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_ALTERNATE_TOP (1<<2) /* for alternate top field */ +#define DRM_MODE_FB_ALTERNATE_BOTTOM (1<<3) /* for alternate bottom field */
struct drm_mode_fb_cmd2 { __u32 fb_id; -- 2.7.4 _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel