Attachment 92893 Details for Bug 73420 – possible fix

[patch] possible fix

0001-drm-radeon-DCE4-clear-bios-scratch-dpms-bit.patch (text/plain), 1.22 KB, created by Alex Deucher on 2014-01-27 23:34:45 UTC

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Creator: Alex Deucher

Created: 2014-01-27 23:34:45 UTC

Size: 1.22 KB

patch

obsolete

>From 42f3834dd06fb8f1a71fa44c1fa063565b6e42f6 Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Mon, 27 Jan 2014 18:29:35 -0500
>Subject: [PATCH] drm/radeon/DCE4+: clear bios scratch dpms bit
>
>The BlankCrtc table in some DCE8 boards has some
>logic shortcuts for the vbios when this bit is set.
>Clear it for driver use.
>
>Bug:
>https://bugs.freedesktop.org/show_bug.cgi?id=73420
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>Cc: stable@vger.kernel.org
>---
> drivers/gpu/drm/radeon/radeon_atombios.c | 4 ++++
> 1 file changed, 4 insertions(+)
>
>diff --git a/drivers/gpu/drm/radeon/radeon_atombios.c b/drivers/gpu/drm/radeon/radeon_atombios.c
>index f48bd6d..1d87aa3 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);
>-- 
>1.8.3.1
>

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Attachments on bug 73420: 91727 | 91728 | 91844 | 91845 | 92893 | 92894 | 92966 | 93015

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