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authorAlex Deucher <alexander.deucher@amd.com>2014-01-27 18:29:35 -0500
committerAlex Deucher <alexander.deucher@amd.com>2014-01-29 16:10:53 -0500
commit6802d4bad83f50081b2788698570218aaff8d10e (patch)
treeb330462d2c9091ef7c9d7f26fcfa9102edc4c13d /drivers/gpu/drm/radeon/radeon_atombios.c
parentffcda352b569dcf5be5c8a5f57545794acf4adb9 (diff)
drm/radeon/DCE4+: clear bios scratch dpms bit (v2)
The BlankCrtc table in some DCE8 boards has some logic shortcuts for the vbios when this bit is set. Clear it for driver use. v2: fix typo Bug: https://bugs.freedesktop.org/show_bug.cgi?id=73420 Signed-off-by: Alex Deucher <alexander.deucher@amd.com> Cc: stable@vger.kernel.org
Diffstat (limited to 'drivers/gpu/drm/radeon/radeon_atombios.c')
-rw-r--r--drivers/gpu/drm/radeon/radeon_atombios.c4
1 files changed, 4 insertions, 0 deletions
diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
index f48bd6dc10c..30844814c25 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -3938,6 +3938,10 @@ void radeon_atom_initialize_bios_scratch_regs(struct drm_device *dev)
/* tell the bios not to handle mode switching */
bios_6_scratch |= ATOM_S6_ACC_BLOCK_DISPLAY_SWITCH;
+ /* clear the vbios dpms state */
+ if (ASIC_IS_DCE4(rdev))
+ bios_2_scratch &= ~ATOM_S2_DEVICE_DPMS_STATE;
+
if (rdev->family >= CHIP_R600) {
WREG32(R600_BIOS_2_SCRATCH, bios_2_scratch);
WREG32(R600_BIOS_6_SCRATCH, bios_6_scratch);