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authorAlex Deucher <alexander.deucher@amd.com>2014-01-27 18:29:35 -0500
committerGreg Kroah-Hartman <gregkh@linuxfoundation.org>2014-02-13 13:48:02 -0800
commitb77d17778310cbe015bd1978a48b1e418b9370d1 (patch)
treefe901ea1cca5ca763a136673eb7d3a696bf4cf95
parent3ca2c5c6827a5064c175010ecd8fdcf10b1b5db2 (diff)
downloadlinaro-lsk-b77d17778310cbe015bd1978a48b1e418b9370d1.tar.gz
drm/radeon/DCE4+: clear bios scratch dpms bit (v2)
commit 6802d4bad83f50081b2788698570218aaff8d10e upstream. 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> Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
-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 239a4074f12..efb06e34aed 100644
--- a/drivers/gpu/drm/radeon/radeon_atombios.c
+++ b/drivers/gpu/drm/radeon/radeon_atombios.c
@@ -2926,6 +2926,10 @@ 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);