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authorKeith Packard <keithp@keithp.com>2009-07-20 14:49:17 -0700
committerDave Airlie <airlied@redhat.com>2009-08-09 12:22:53 +1000
commit38d5487db7f289be1d56ac7df704ee49ed3213b9 (patch)
tree579d620868d87464832424b7e634b07836406ca0
parent7b2aa037e878c939676675969983284a02958ae3 (diff)
drm: When adding probed modes, preserve duplicate mode types
The code which takes probed modes and adds them to a connector eliminates duplicate modes by comparing them using drm_mode_equal. That function doesn't consider the type bits, which means that any modes which differ only in the type field will be lost. One of the bits in the mode->type field is the DRM_MODE_TYPE_PREFERRED bit. If the mode with that bit is lost, then higher level code will not know which mode to select, causing a random mode to be used instead. This patch simply merges the two mode type bits together; that seems reasonable to me, but perhaps only a subset of the bits should be used? None of these can be user defined as they all come from looking at just the hardware. Signed-off-by: Keith Packard <keithp@keithp.com> Signed-off-by: Dave Airlie <airlied@redhat.com>
-rw-r--r--drivers/gpu/drm/drm_modes.c2
1 files changed, 2 insertions, 0 deletions
diff --git a/drivers/gpu/drm/drm_modes.c b/drivers/gpu/drm/drm_modes.c
index 54f492a488a..7914097b09c 100644
--- a/drivers/gpu/drm/drm_modes.c
+++ b/drivers/gpu/drm/drm_modes.c
@@ -566,6 +566,8 @@ void drm_mode_connector_list_update(struct drm_connector *connector)
found_it = 1;
/* if equal delete the probed mode */
mode->status = pmode->status;
+ /* Merge type bits together */
+ mode->type |= pmode->type;
list_del(&pmode->head);
drm_mode_destroy(connector->dev, pmode);
break;