summaryrefslogtreecommitdiffstats
path: root/drivers/gpu/drm/radeon/atombios_crtc.c
diff options
context:
space:
mode:
authorAlex Deucher <alexdeucher@gmail.com>2010-03-06 10:57:30 -0500
committerDave Airlie <airlied@redhat.com>2010-03-15 09:56:04 +1000
commitb792210e7d1f9fb102061e2016da96cf2ad5cdbd (patch)
treea1facb424c8be7a0e56900181be59a639293e453 /drivers/gpu/drm/radeon/atombios_crtc.c
parentc21b0fe6de3912f53087b4f3991942529f03eef6 (diff)
downloadblackbird-op-linux-b792210e7d1f9fb102061e2016da96cf2ad5cdbd.tar.gz
blackbird-op-linux-b792210e7d1f9fb102061e2016da96cf2ad5cdbd.zip
drm/radeon/kms/atom: spread spectrum fix
The atom spread spectrum table does not always disable ss. Explicitly disable it and then use the atom table to enable later if needed (currently only used for LVDS). Fixes display issues on some systems. Signed-off-by: Alex Deucher <alexdeucher@gmail.com> Cc: stable@kernel.org Signed-off-by: Dave Airlie <airlied@redhat.com>
Diffstat (limited to 'drivers/gpu/drm/radeon/atombios_crtc.c')
-rw-r--r--drivers/gpu/drm/radeon/atombios_crtc.c57
1 files changed, 50 insertions, 7 deletions
diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index dd9fdf560611..0c676696a0dd 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -353,12 +353,55 @@ static void atombios_crtc_set_timing(struct drm_crtc *crtc,
atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}
+static void atombios_disable_ss(struct drm_crtc *crtc)
+{
+ struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
+ struct drm_device *dev = crtc->dev;
+ struct radeon_device *rdev = dev->dev_private;
+ u32 ss_cntl;
+
+ if (ASIC_IS_DCE4(rdev)) {
+ switch (radeon_crtc->pll_id) {
+ case ATOM_PPLL1:
+ ss_cntl = RREG32(EVERGREEN_P1PLL_SS_CNTL);
+ ss_cntl &= ~EVERGREEN_PxPLL_SS_EN;
+ WREG32(EVERGREEN_P1PLL_SS_CNTL, ss_cntl);
+ break;
+ case ATOM_PPLL2:
+ ss_cntl = RREG32(EVERGREEN_P2PLL_SS_CNTL);
+ ss_cntl &= ~EVERGREEN_PxPLL_SS_EN;
+ WREG32(EVERGREEN_P2PLL_SS_CNTL, ss_cntl);
+ break;
+ case ATOM_DCPLL:
+ case ATOM_PPLL_INVALID:
+ return;
+ }
+ } else if (ASIC_IS_AVIVO(rdev)) {
+ switch (radeon_crtc->pll_id) {
+ case ATOM_PPLL1:
+ ss_cntl = RREG32(AVIVO_P1PLL_INT_SS_CNTL);
+ ss_cntl &= ~1;
+ WREG32(AVIVO_P1PLL_INT_SS_CNTL, ss_cntl);
+ break;
+ case ATOM_PPLL2:
+ ss_cntl = RREG32(AVIVO_P2PLL_INT_SS_CNTL);
+ ss_cntl &= ~1;
+ WREG32(AVIVO_P2PLL_INT_SS_CNTL, ss_cntl);
+ break;
+ case ATOM_DCPLL:
+ case ATOM_PPLL_INVALID:
+ return;
+ }
+ }
+}
+
+
union atom_enable_ss {
ENABLE_LVDS_SS_PARAMETERS legacy;
ENABLE_SPREAD_SPECTRUM_ON_PPLL_PS_ALLOCATION v1;
};
-static void atombios_set_ss(struct drm_crtc *crtc, int enable)
+static void atombios_enable_ss(struct drm_crtc *crtc)
{
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct drm_device *dev = crtc->dev;
@@ -387,9 +430,9 @@ static void atombios_set_ss(struct drm_crtc *crtc, int enable)
step = dig->ss->step;
delay = dig->ss->delay;
range = dig->ss->range;
- } else if (enable)
+ } else
return;
- } else if (enable)
+ } else
return;
break;
}
@@ -406,13 +449,13 @@ static void atombios_set_ss(struct drm_crtc *crtc, int enable)
args.v1.ucSpreadSpectrumDelay = delay;
args.v1.ucSpreadSpectrumRange = range;
args.v1.ucPpll = radeon_crtc->crtc_id ? ATOM_PPLL2 : ATOM_PPLL1;
- args.v1.ucEnable = enable;
+ args.v1.ucEnable = ATOM_ENABLE;
} else {
args.legacy.usSpreadSpectrumPercentage = cpu_to_le16(percentage);
args.legacy.ucSpreadSpectrumType = type;
args.legacy.ucSpreadSpectrumStepSize_Delay = (step & 3) << 2;
args.legacy.ucSpreadSpectrumStepSize_Delay |= (delay & 7) << 4;
- args.legacy.ucEnable = enable;
+ args.legacy.ucEnable = ATOM_ENABLE;
}
atom_execute_table(rdev->mode_info.atom_context, index, (uint32_t *)&args);
}
@@ -1086,12 +1129,12 @@ int atombios_crtc_mode_set(struct drm_crtc *crtc,
/* pick pll */
radeon_crtc->pll_id = radeon_atom_pick_pll(crtc);
- atombios_set_ss(crtc, 0);
+ atombios_disable_ss(crtc);
/* always set DCPLL */
if (ASIC_IS_DCE4(rdev))
atombios_crtc_set_dcpll(crtc);
atombios_crtc_set_pll(crtc, adjusted_mode);
- atombios_set_ss(crtc, 1);
+ atombios_enable_ss(crtc);
if (ASIC_IS_DCE4(rdev))
atombios_set_crtc_dtd_timing(crtc, adjusted_mode);
OpenPOWER on IntegriCloud