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Commit 6802d4ba authored by Alex Deucher's avatar Alex Deucher
Browse files

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: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent ffcda352

drivers/gpu/drm/radeon/radeon_atombios.c

+4 −0
Original line number Diff line number Diff line
@@ -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);