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| author | Bryan Freed <bfreed@google.com> | 2011-01-12 13:43:19 -0800 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2011-01-19 13:12:16 +0000 |
| commit | aa9b500ddf1a6318e7cf8b1754696edddae86db9 (patch) | |
| tree | 097555b4a1e4bc13520d86ad8678f6c524d218a6 /drivers/gpu/drm/i915/i915_reg.h | |
| parent | ccab5c82759e2ace74b2e84f82d1e0eedd932571 (diff) | |
| download | lwn-aa9b500ddf1a6318e7cf8b1754696edddae86db9.tar.gz lwn-aa9b500ddf1a6318e7cf8b1754696edddae86db9.zip | |
drm/i915: Honour LVDS sync polarity from EDID
The i915 driver normally assumes the video bios has configured several
of the LVDS panel registers, and it just inherits the values. If the
vbios has not run, several of these will need to be setup. So we need to
check that the LVDS sync polarity is correctly configured per any
available modelines (e.g. EDID) and adjust if not, issuing a warning as
we do.
Signed-off-by: Mark Hayter <mdhayter@chromium.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu/drm/i915/i915_reg.h')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 4 |
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 810cfa866413..4c71f5692dae 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -1437,6 +1437,10 @@ #define LVDS_PIPEB_SELECT (1 << 30) /* LVDS dithering flag on 965/g4x platform */ #define LVDS_ENABLE_DITHER (1 << 25) +/* LVDS sync polarity flags. Set to invert (i.e. negative) */ +#define LVDS_VSYNC_POLARITY (1 << 21) +#define LVDS_HSYNC_POLARITY (1 << 20) + /* Enable border for unscaled (or aspect-scaled) display */ #define LVDS_BORDER_ENABLE (1 << 15) /* |