Donate to e Foundation | Murena handsets with /e/OS | Own a part of Murena! Learn more

Commit 8097d941 authored by Alex Deucher's avatar Alex Deucher
Browse files

drm/radeon/dpm: disable mclk switching on desktop RV770 

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: default avatarAlex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
parent d526fbdd

drivers/gpu/drm/radeon/rv770_dpm.c

+6 −0
Original line number Diff line number Diff line
@@ -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