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drm/amd/display: defer modeset check in dm_update_planes_state 

amdgpu_dm_atomic_check() is used to validate the entire configuration of
planes and crtc's that the user space wants to commit.

However amdgpu_dm_atomic_check() depends upon DRM_MODE_ATOMIC_ALLOW_MODESET
flag else its mostly dummy.
Its not mandatory for the user space to set DRM_MODE_ATOMIC_ALLOW_MODESET,
and in general its not set either along with DRM_MODE_ATOMIC_TEST_ONLY.

Considering its importantance, this patch defers the allow_modeset check
in dm_update_planes_state(), so that there shall be scope to validate
the configuration sent from user space, without impacting the population
of dc/dm related data structures.

Signed-off-by: Shirish S <shirish.s@amd.com>
Reviewed-by: Harry Wentland <Harry.Wentland@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Shirish S 2018-02-16 11:44:22 +05:30 committed by Alex Deucher
parent 33f2d94ecd
commit c21b68c5eb
1 changed files with 4 additions and 2 deletions
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6
drivers/gpu/drm/amd/display/amdgpu_dm/amdgpu_dm.c
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@ -4687,8 +4687,6 @@ static int dm_update_planes_state(struct dc *dc,
bool pflip_needed = !state->allow_modeset;
int ret = 0;
if (pflip_needed)
return ret;
/* Add new planes */
for_each_oldnew_plane_in_state(state, plane, old_plane_state, new_plane_state, i) {
@ -4703,6 +4701,8 @@ static int dm_update_planes_state(struct dc *dc,
/* Remove any changed/removed planes */
if (!enable) {
if (pflip_needed)
continue;
if (!old_plane_crtc)
continue;
@ -4747,6 +4747,8 @@ static int dm_update_planes_state(struct dc *dc,
if (!dm_new_crtc_state->stream)
continue;
if (pflip_needed)
continue;
WARN_ON(dm_new_plane_state->dc_state);