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drm/radeon/dpm: reduce r7xx vblank mclk threshold to 200 

Most laptops seems to have a vblank period of less than
300 and mclk switching works fine.  Drop the quirk and
set the default threshold to 200.

bug:
https://bugzilla.kernel.org/show_bug.cgi?id=70701

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
This commit is contained in:
Alex Deucher 2014-02-17 12:50:13 -05:00
parent bea61c59d7
commit 78b0351019
1 changed files with 1 additions and 8 deletions
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9
drivers/gpu/drm/radeon/rv770_dpm.c
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@ -2526,14 +2526,7 @@ u32 rv770_dpm_get_mclk(struct radeon_device *rdev, bool low)
bool rv770_dpm_vblank_too_short(struct radeon_device *rdev)
{
u32 vblank_time = r600_dpm_get_vblank_time(rdev);
u32 switch_limit = 300;
/* quirks */
/* ASUS K70AF */
if ((rdev->pdev->device == 0x9553) &&
(rdev->pdev->subsystem_vendor == 0x1043) &&
(rdev->pdev->subsystem_device == 0x1c42))
switch_limit = 200;
u32 switch_limit = 200; /* 300 */
/* RV770 */
/* mclk switching doesn't seem to work reliably on desktop RV770s */