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path: root/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
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Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_legacy_crtc.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_legacy_crtc.c8
1 files changed, 8 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index df23d6a01d0..88865e38fe3 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -603,6 +603,10 @@ static bool radeon_set_crtc_timing(struct drm_crtc *crtc, struct drm_display_mod
? RADEON_CRTC2_INTERLACE_EN
: 0));
+ /* rs4xx chips seem to like to have the crtc enabled when the timing is set */
+ if ((rdev->family == CHIP_RS400) || (rdev->family == CHIP_RS480))
+ crtc2_gen_cntl |= RADEON_CRTC2_EN;
+
disp2_merge_cntl = RREG32(RADEON_DISP2_MERGE_CNTL);
disp2_merge_cntl &= ~RADEON_DISP2_RGB_OFFSET_EN;
@@ -630,6 +634,10 @@ static bool radeon_set_crtc_timing(struct drm_crtc *crtc, struct drm_display_mod
? RADEON_CRTC_INTERLACE_EN
: 0));
+ /* rs4xx chips seem to like to have the crtc enabled when the timing is set */
+ if ((rdev->family == CHIP_RS400) || (rdev->family == CHIP_RS480))
+ crtc_gen_cntl |= RADEON_CRTC_EN;
+
crtc_ext_cntl = RREG32(RADEON_CRTC_EXT_CNTL);
crtc_ext_cntl |= (RADEON_XCRT_CNT_EN |
RADEON_CRTC_VSYNC_DIS |