Attachment 77808 Details for Bug 57567 – temporary workaround

[patch] temporary workaround

0001-drm-radeon-disable-the-crtcs-in-mc_stop-evergreen.patch (text/plain), 1.73 KB, created by Alex Deucher on 2013-04-11 13:05:55 UTC

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Creator: Alex Deucher

Created: 2013-04-11 13:05:55 UTC

Size: 1.73 KB

patch

obsolete

>From 91396368bbdd6422ea4e11ba20772e5c6d127a5c Mon Sep 17 00:00:00 2001
>From: Alex Deucher <alexander.deucher@amd.com>
>Date: Wed, 10 Apr 2013 19:08:14 -0400
>Subject: [PATCH] drm/radeon: disable the crtcs in mc_stop (evergreen+)
>
>Just disabling the mem requests should be enough, but
>that doesn't seem to work correctly on efi systems.
>
>May fix:
>https://bugs.freedesktop.org/show_bug.cgi?id=57567
>https://bugs.freedesktop.org/show_bug.cgi?id=43655
>https://bugzilla.kernel.org/show_bug.cgi?id=56441
>
>Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
>Cc: stable@vger.kernel.org
>---
> drivers/gpu/drm/radeon/evergreen.c |   10 ++++++++++
> 1 files changed, 10 insertions(+), 0 deletions(-)
>
>diff --git a/drivers/gpu/drm/radeon/evergreen.c b/drivers/gpu/drm/radeon/evergreen.c
>index f6c17b3..d258051 100644
>--- a/drivers/gpu/drm/radeon/evergreen.c
>+++ b/drivers/gpu/drm/radeon/evergreen.c
>@@ -1557,6 +1557,16 @@ void evergreen_mc_stop(struct radeon_device *rdev, struct evergreen_mc_save *sav
> 	WREG32(VGA_RENDER_CONTROL, 0);
> 	/* blank the display controllers */
> 	for (i = 0; i < rdev->num_crtc; i++) {
>+		/* XXX this is a hack to avoid strange behavior with EFI on certain systems */
>+		crtc_enabled = RREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i]) & EVERGREEN_CRTC_MASTER_EN;
>+		if (crtc_enabled) {
>+			WREG32(EVERGREEN_CRTC_UPDATE_LOCK + crtc_offsets[i], 1);
>+			tmp = RREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i]);
>+			tmp &= ~EVERGREEN_CRTC_MASTER_EN;
>+			WREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i], tmp);
>+			WREG32(EVERGREEN_CRTC_UPDATE_LOCK + crtc_offsets[i], 0);
>+		}
>+		/* ***** */
> 		crtc_enabled = RREG32(EVERGREEN_CRTC_CONTROL + crtc_offsets[i]) & EVERGREEN_CRTC_MASTER_EN;
> 		if (crtc_enabled) {
> 			save->crtc_enabled[i] = true;
>-- 
>1.7.7.5
>

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Attachments on bug 57567: 70606 | 70607 | 70608 | 70609 | 77383 | 77406 | 77407 | 77441 | 77602 | 77625 | 77705 | 77706 | 77743 | 77761 | 77808 | 77915 | 77999 | 78000 | 78081 | 78090

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