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drm: Implement timings adjustments for frame packing

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When using the frame packing and a single big framebuffer, some hardware
requires that we do everything like if we were scanning out the big
buffer itself. Let's instrument drm_mode_set_crtcinfo() to be able to do
this adjustement if the driver is asking for it.

v2: Use crtc_vtotal and multiply the clock by 2 instead of
    reconstructing it (Ville Syrjälä)

Suggested-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Acked-by: Dave Airlie <airlied@gmail.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau
2013-09-25 16:45:35 +01:00
committed by Daniel Vetter
parent bde2dcf701
commit 448cce25f4
2 changed files with 23 additions and 2 deletions
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3
include/drm/drm_crtc.h
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@@ -125,7 +125,8 @@ enum drm_mode_status {
.vscan = (vs), .flags = (f), \
.base.type = DRM_MODE_OBJECT_MODE
#define CRTC_INTERLACE_HALVE_V 0x1 /* halve V values for interlacing */
#define CRTC_INTERLACE_HALVE_V (1 << 0) /* halve V values for interlacing */
#define CRTC_STEREO_DOUBLE (1 << 1) /* adjust timings for stereo modes */
struct drm_display_mode {
/* Header */