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authorDamien Lespiau <damien.lespiau@intel.com>2013-09-25 16:45:35 +0100
committerDaniel Vetter <daniel.vetter@ffwll.ch>2013-10-01 07:45:36 +0200
commit448cce25f408be4c933f88ed8962455a0c16d0f8 (patch)
treef1edc83da4d75c67de279c6cb2b442a88a2b262b /drivers/gpu/drm/drm_modes.c
parentbde2dcf701db9fa6d010afa8e9254c3d7b0331fb (diff)
downloadop-kernel-dev-448cce25f408be4c933f88ed8962455a0c16d0f8.zip
op-kernel-dev-448cce25f408be4c933f88ed8962455a0c16d0f8.tar.gz
drm: Implement timings adjustments for frame packing
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>
Diffstat (limited to 'drivers/gpu/drm/drm_modes.c')
-rw-r--r--drivers/gpu/drm/drm_modes.c22
1 files changed, 21 insertions, 1 deletions
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index ef26eb2..b073315 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -707,12 +707,18 @@ EXPORT_SYMBOL(drm_mode_vrefresh);
/**
* drm_mode_set_crtcinfo - set CRTC modesetting parameters
* @p: mode
- * @adjust_flags: unused? (FIXME)
+ * @adjust_flags: a combination of adjustment flags
*
* LOCKING:
* None.
*
* Setup the CRTC modesetting parameters for @p, adjusting if necessary.
+ *
+ * - The CRTC_INTERLACE_HALVE_V flag can be used to halve vertical timings of
+ * interlaced modes.
+ * - The CRTC_STEREO_DOUBLE flag can be used to compute the timings for
+ * buffers containing two eyes (only adjust the timings when needed, eg. for
+ * "frame packing" or "side by side full").
*/
void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
{
@@ -753,6 +759,20 @@ void drm_mode_set_crtcinfo(struct drm_display_mode *p, int adjust_flags)
p->crtc_vtotal *= p->vscan;
}
+ if (adjust_flags & CRTC_STEREO_DOUBLE) {
+ unsigned int layout = p->flags & DRM_MODE_FLAG_3D_MASK;
+
+ switch (layout) {
+ case DRM_MODE_FLAG_3D_FRAME_PACKING:
+ p->crtc_clock *= 2;
+ p->crtc_vdisplay += p->crtc_vtotal;
+ p->crtc_vsync_start += p->crtc_vtotal;
+ p->crtc_vsync_end += p->crtc_vtotal;
+ p->crtc_vtotal += p->crtc_vtotal;
+ break;
+ }
+ }
+
p->crtc_vblank_start = min(p->crtc_vsync_start, p->crtc_vdisplay);
p->crtc_vblank_end = max(p->crtc_vsync_end, p->crtc_vtotal);
p->crtc_hblank_start = min(p->crtc_hsync_start, p->crtc_hdisplay);
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