diff options
| author | Jesse Barnes <jbarnes@virtuousgeek.org> | 2010-10-07 16:01:15 -0700 |
|---|---|---|
| committer | Chris Wilson <chris@chris-wilson.co.uk> | 2010-10-08 10:28:21 +0100 |
| commit | 5b2adf897146edeac6a1e438fb67b5a53dbbdf34 (patch) | |
| tree | 1bc198b1d20401a49cda217ff0981e957285fe1c /drivers/gpu | |
| parent | 9f0e7ff4b366d27570cbe0ffa137ed1018009114 (diff) | |
drm/i915: add Ironlake clock gating workaround for FDI link training
Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Chris Wilson <chris@chris-wilson.co.uk>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/i915/i915_reg.h | 1 | ||||
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 8 |
2 files changed, 9 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index a72335e940f1..5a22887a5381 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2782,6 +2782,7 @@ #define FDI_RXA_CHICKEN 0xc200c #define FDI_RXB_CHICKEN 0xc2010 #define FDI_RX_PHASE_SYNC_POINTER_ENABLE (1) +#define FDI_RX_CHICKEN(pipe) _PIPE(pipe, FDI_RXA_CHICKEN, FDI_RXB_CHICKEN) /* CPU: FDI_TX */ #define FDI_TXA_CTL 0x60100 diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 349710a8014c..5812fc7c5a0f 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1714,6 +1714,9 @@ static void ironlake_fdi_link_train(struct drm_crtc *crtc) POSTING_READ(reg); udelay(150); + /* Ironlake workaround, enable clock pointer after FDI enable*/ + I915_WRITE(FDI_RX_CHICKEN(pipe), FDI_RX_PHASE_SYNC_POINTER_ENABLE); + reg = FDI_RX_IIR(pipe); for (tries = 0; tries < 5; tries++) { temp = I915_READ(reg); @@ -2192,6 +2195,11 @@ static void ironlake_crtc_disable(struct drm_crtc *crtc) POSTING_READ(reg); udelay(100); + /* Ironlake workaround, disable clock pointer after downing FDI */ + I915_WRITE(FDI_RX_CHICKEN(pipe), + I915_READ(FDI_RX_CHICKEN(pipe) & + ~FDI_RX_PHASE_SYNC_POINTER_ENABLE)); + /* still set train pattern 1 */ reg = FDI_TX_CTL(pipe); temp = I915_READ(reg); |