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drm/radeon: don't disable plls that are in use by other crtcs 

Some plls are shared for DP.

Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
Cc: stable@vger.kernel.org
Reviewed-by: Michel Dänzer <michel.daenzer@amd.com>
This commit is contained in:
Alex Deucher 2012-08-21 19:06:21 -04:00
parent 523885dec1
commit 4e58591c89
1 changed files with 14 additions and 0 deletions
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14
drivers/gpu/drm/radeon/atombios_crtc.c
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@ -1682,9 +1682,22 @@ static void atombios_crtc_disable(struct drm_crtc *crtc)
struct drm_device *dev = crtc->dev;
struct radeon_device *rdev = dev->dev_private;
struct radeon_atom_ss ss;
int i;
atombios_crtc_dpms(crtc, DRM_MODE_DPMS_OFF);
for (i = 0; i < rdev->num_crtc; i++) {
if (rdev->mode_info.crtcs[i] &&
rdev->mode_info.crtcs[i]->enabled &&
i != radeon_crtc->crtc_id &&
radeon_crtc->pll_id == rdev->mode_info.crtcs[i]->pll_id) {
/* one other crtc is using this pll don't turn
* off the pll
*/
goto done;
}
}
switch (radeon_crtc->pll_id) {
case ATOM_PPLL1:
case ATOM_PPLL2:
@ -1701,6 +1714,7 @@ static void atombios_crtc_disable(struct drm_crtc *crtc)
default:
break;
}
done:
radeon_crtc->pll_id = -1;
}