diff options
| author | Liviu Dudau <Liviu.Dudau@arm.com> | 2018-07-23 14:05:53 +0300 |
|---|---|---|
| committer | Liviu Dudau <Liviu.Dudau@arm.com> | 2018-07-31 18:31:50 +0300 |
| commit | d664b851eb2bcdf84a3c063cf59457bb15bc6120 (patch) | |
| tree | af8a44c9ef7edb2205f7d9d51aef14ff2fce456a /drivers/gpu/drm/arm/hdlcd_crtc.c | |
| parent | 9fd466f54f89fc3a2dc6f86fce2ea0b993ff83bd (diff) | |
| download | linux-d664b851eb2bcdf84a3c063cf59457bb15bc6120.tar.xz | |
drm/arm/hdlcd: Reject atomic commits that disable only the plane
The HDLCD engine needs an active plane while the CRTC is active, as
it will start scanning out data from HDLCD_REG_FB_BASE once it gets
enabled. Make sure that the only available plane doesn't get disabled
while the CRTC remains active, as this will scanout invalid data.
Signed-off-by: Liviu Dudau <liviu.dudau@arm.com>
Diffstat (limited to 'drivers/gpu/drm/arm/hdlcd_crtc.c')
| -rw-r--r-- | drivers/gpu/drm/arm/hdlcd_crtc.c | 23 |
1 files changed, 11 insertions, 12 deletions
diff --git a/drivers/gpu/drm/arm/hdlcd_crtc.c b/drivers/gpu/drm/arm/hdlcd_crtc.c index 8978d82159e5..e4d67b70244d 100644 --- a/drivers/gpu/drm/arm/hdlcd_crtc.c +++ b/drivers/gpu/drm/arm/hdlcd_crtc.c @@ -229,6 +229,8 @@ static const struct drm_crtc_helper_funcs hdlcd_crtc_helper_funcs = { static int hdlcd_plane_atomic_check(struct drm_plane *plane, struct drm_plane_state *state) { + int i; + struct drm_crtc *crtc; struct drm_crtc_state *crtc_state; u32 src_h = state->src_h >> 16; @@ -238,20 +240,17 @@ static int hdlcd_plane_atomic_check(struct drm_plane *plane, return -EINVAL; } - if (!state->fb || !state->crtc) - return 0; - - crtc_state = drm_atomic_get_existing_crtc_state(state->state, - state->crtc); - if (!crtc_state) { - DRM_DEBUG_KMS("Invalid crtc state\n"); - return -EINVAL; + for_each_new_crtc_in_state(state->state, crtc, crtc_state, i) { + /* we cannot disable the plane while the CRTC is active */ + if (!state->fb && crtc_state->active) + return -EINVAL; + return drm_atomic_helper_check_plane_state(state, crtc_state, + DRM_PLANE_HELPER_NO_SCALING, + DRM_PLANE_HELPER_NO_SCALING, + false, true); } - return drm_atomic_helper_check_plane_state(state, crtc_state, - DRM_PLANE_HELPER_NO_SCALING, - DRM_PLANE_HELPER_NO_SCALING, - false, true); + return 0; } static void hdlcd_plane_atomic_update(struct drm_plane *plane, |