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drm: Code stereo layouts as an enum rather than a bit field

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This allows us to use fewer bits in the mode structure, leaving room for
future work while allowing more stereo layouts types than we could have
ever dreamt of.

I also exposed the previously private DRM_MODE_FLAG_3D_MASK to set in
stone that we are using 5 bits for the stereo layout enum, reserving 32
values.

Even with that reservation, we gain 3 bits from the previous encoding.

The code adding the mandatory stereo modes needeed to be adapted as it was
relying or being able to or stereo layouts together.

Suggested-by: Daniel Vetter <daniel@ffwll.ch>
Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
This commit is contained in:
Damien Lespiau 2013-09-27 12:11:48 +01:00 • committed by Daniel Vetter
parent e454a05da6
commit f7e121b764
3 changed files with 26 additions and 49 deletions
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19
include/uapi/drm/drm_mode.h
View file

@ -58,14 +58,17 @@
#define DRM_MODE_FLAG_PIXMUX (1<<11)
#define DRM_MODE_FLAG_DBLCLK (1<<12)
#define DRM_MODE_FLAG_CLKDIV2 (1<<13)
#define DRM_MODE_FLAG_3D_FRAME_PACKING (1<<14)
#define DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE (1<<15)
#define DRM_MODE_FLAG_3D_LINE_ALTERNATIVE (1<<16)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL (1<<17)
#define DRM_MODE_FLAG_3D_L_DEPTH (1<<18)
#define DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH (1<<19)
#define DRM_MODE_FLAG_3D_TOP_AND_BOTTOM (1<<20)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF (1<<21)
#define DRM_MODE_FLAG_3D_MASK (0x1f<<14)
#define DRM_MODE_FLAG_3D_NONE (0<<14)
#define DRM_MODE_FLAG_3D_FRAME_PACKING (1<<14)
#define DRM_MODE_FLAG_3D_FIELD_ALTERNATIVE (2<<14)
#define DRM_MODE_FLAG_3D_LINE_ALTERNATIVE (3<<14)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_FULL (4<<14)
#define DRM_MODE_FLAG_3D_L_DEPTH (5<<14)
#define DRM_MODE_FLAG_3D_L_DEPTH_GFX_GFX_DEPTH (6<<14)
#define DRM_MODE_FLAG_3D_TOP_AND_BOTTOM (7<<14)
#define DRM_MODE_FLAG_3D_SIDE_BY_SIDE_HALF (8<<14)
/* DPMS flags */
/* bit compatible with the xorg definitions. */