On 2018-11-29 10:44 a.m., Nicholas Kazlauskas wrote: > [Why] > If the "max bpc" isn't explicitly set in the atomic state then it > have a value of 0. This has the correct behavior of limiting a panel > to 8bpc in the case where the panel supports 8bpc. In the case of eDP > panels this isn't a true assumption - there are panels that can only > do 6bpc. > > Banding occurs for these displays. > > [How] > Initialize the max_bpc when the connector resets to 8bpc. Also carry > over the value when the state is duplicated. > > Bugzilla: https://bugs.freedesktop.org/108825 > Fixes: 307638884f72 ("drm/amd/display: Support amdgpu "max bpc" connector > property") > > Signed-off-by: Nicholas Kazlauskas <nicholas.kazlaus...@amd.com>
Reviewed-by: Harry Wentland <harry.wentl...@amd.com> Harry > --- > drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c | 2 ++ > 1 file changed, 2 insertions(+) > > diff --git a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > index ce00e56814ed..ede93d53e209 100644 > --- a/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > +++ b/drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c > @@ -3215,6 +3215,7 @@ void amdgpu_dm_connector_funcs_reset(struct > drm_connector *connector) > state->underscan_enable = false; > state->underscan_hborder = 0; > state->underscan_vborder = 0; > + state->max_bpc = 8; > > __drm_atomic_helper_connector_reset(connector, &state->base); > } > @@ -3236,6 +3237,7 @@ amdgpu_dm_connector_atomic_duplicate_state(struct > drm_connector *connector) > > new_state->freesync_capable = state->freesync_capable; > new_state->abm_level = state->abm_level; > + new_state->max_bpc = state->max_bpc; > > return &new_state->base; > } > _______________________________________________ amd-gfx mailing list amd-gfx@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/amd-gfx
