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authorAlex Deucher <alexander.deucher@amd.com>2012-07-26 21:38:52 +0400
committerAlex Deucher <alexander.deucher@amd.com>2012-08-13 18:50:50 +0400
commit6c0ae2ab85fc4a95cae82047a7db1f688a7737ab (patch)
tree44dfa02a721ea76ec19a4ef8f6ef06f48a7bcbd1 /drivers/gpu/drm/radeon/radeon_legacy_crtc.c
parent3838f46e363d5a07e61d0352bf11d534dc61f921 (diff)
downloadlinux-6c0ae2ab85fc4a95cae82047a7db1f688a7737ab.tar.xz
drm/radeon: properly handle crtc powergating
Need to make sure the crtc is gated on before modesetting. Explicitly gate the crtc on in prepare() and set a flag so that the dpms functions don't gate it off during mode set. Noticed by sylware on IRC. Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_legacy_crtc.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_legacy_crtc.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index d5fd615897ec..94b4a1c12893 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -1025,9 +1025,11 @@ static int radeon_crtc_mode_set(struct drm_crtc *crtc,
static void radeon_crtc_prepare(struct drm_crtc *crtc)
{
+ struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct drm_crtc *crtci;
+ radeon_crtc->in_mode_set = true;
/*
* The hardware wedges sometimes if you reconfigure one CRTC
* whilst another is running (see fdo bug #24611).
@@ -1038,6 +1040,7 @@ static void radeon_crtc_prepare(struct drm_crtc *crtc)
static void radeon_crtc_commit(struct drm_crtc *crtc)
{
+ struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct drm_crtc *crtci;
@@ -1048,6 +1051,7 @@ static void radeon_crtc_commit(struct drm_crtc *crtc)
if (crtci->enabled)
radeon_crtc_dpms(crtci, DRM_MODE_DPMS_ON);
}
+ radeon_crtc->in_mode_set = false;
}
static const struct drm_crtc_helper_funcs legacy_helper_funcs = {