drm/radeon: add a connector property for dither
Allows you to enable dither in the display hardware
when the monitor supports lower a lower bpc than the
current framebuffer format.
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
diff --git a/drivers/gpu/drm/radeon/r600.c b/drivers/gpu/drm/radeon/r600.c
index bdf4b80..af922e2 100644
--- a/drivers/gpu/drm/radeon/r600.c
+++ b/drivers/gpu/drm/radeon/r600.c
@@ -133,10 +133,13 @@
struct drm_connector *connector = radeon_get_connector_for_encoder(encoder);
int bpc = 0;
u32 tmp = 0;
- bool dither = false;
+ enum radeon_connector_dither dither = RADEON_FMT_DITHER_DISABLE;
- if (connector)
+ if (connector) {
+ struct radeon_connector *radeon_connector = to_radeon_connector(connector);
bpc = radeon_get_monitor_bpc(connector);
+ dither = radeon_connector->dither;
+ }
/* LVDS FMT is set up by atom */
if (radeon_encoder->devices & ATOM_DEVICE_LCD_SUPPORT)
@@ -152,14 +155,14 @@
switch (bpc) {
case 6:
- if (dither)
+ if (dither == RADEON_FMT_DITHER_ENABLE)
/* XXX sort out optimal dither settings */
tmp |= FMT_SPATIAL_DITHER_EN;
else
tmp |= FMT_TRUNCATE_EN;
break;
case 8:
- if (dither)
+ if (dither == RADEON_FMT_DITHER_ENABLE)
/* XXX sort out optimal dither settings */
tmp |= (FMT_SPATIAL_DITHER_EN | FMT_SPATIAL_DITHER_DEPTH);
else