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Date: Fri, 7 Feb 2014 11:46:10 +0000 From: Luis Henriques <luis.henriques@...onical.com> To: linux-kernel@...r.kernel.org, stable@...r.kernel.org, kernel-team@...ts.ubuntu.com Cc: Alex Deucher <alexander.deucher@....com>, Luis Henriques <luis.henriques@...onical.com> Subject: [PATCH 3.11 151/233] drm/radeon/dpm: disable mclk switching on desktop RV770 3.11.10.4 -stable review patch. If anyone has any objections, please let me know. ------------------ From: Alex Deucher <alexander.deucher@....com> commit 8097d94116d0c17e774ba4c8256e774018dc2a46 upstream. Mclk switching doesn't seem to work reliably on these cards. Most RV770 boards specify the same mclk for all performance levels anyway so in most cases, this has no affect. Bug: https://bugs.freedesktop.org/show_bug.cgi?id=73067 Signed-off-by: Alex Deucher <alexander.deucher@....com> Signed-off-by: Luis Henriques <luis.henriques@...onical.com> --- drivers/gpu/drm/radeon/rv770_dpm.c | 6 ++++++ 1 file changed, 6 insertions(+) diff --git a/drivers/gpu/drm/radeon/rv770_dpm.c b/drivers/gpu/drm/radeon/rv770_dpm.c index 4f17b31..a923ba9 100644 --- a/drivers/gpu/drm/radeon/rv770_dpm.c +++ b/drivers/gpu/drm/radeon/rv770_dpm.c @@ -2536,6 +2536,12 @@ bool rv770_dpm_vblank_too_short(struct radeon_device *rdev) (rdev->pdev->subsystem_device == 0x1c42)) switch_limit = 200; + /* RV770 */ + /* mclk switching doesn't seem to work reliably on desktop RV770s */ + if ((rdev->family == CHIP_RV770) && + !(rdev->flags & RADEON_IS_MOBILITY)) + switch_limit = 0xffffffff; /* disable mclk switching */ + if (vblank_time < switch_limit) return true; else -- 1.8.3.2 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@...r.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/
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