diff options
Diffstat (limited to 'drivers/gpu/drm/i915/intel_display.c')
| -rw-r--r-- | drivers/gpu/drm/i915/intel_display.c | 41 |
1 files changed, 41 insertions, 0 deletions
diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index d658d6e0fb4..4d4613399b1 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1876,6 +1876,39 @@ static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode) /* wait one idle pattern time */ udelay(100); + /* For PCH DP, enable TRANS_DP_CTL */ + if (HAS_PCH_CPT(dev) && + intel_pipe_has_type(crtc, INTEL_OUTPUT_DISPLAYPORT)) { + int trans_dp_ctl = (pipe == 0) ? TRANS_DP_CTL_A : TRANS_DP_CTL_B; + int reg; + + reg = I915_READ(trans_dp_ctl); + reg &= ~TRANS_DP_PORT_SEL_MASK; + reg = TRANS_DP_OUTPUT_ENABLE | + TRANS_DP_ENH_FRAMING | + TRANS_DP_VSYNC_ACTIVE_HIGH | + TRANS_DP_HSYNC_ACTIVE_HIGH; + + switch (intel_trans_dp_port_sel(crtc)) { + case PCH_DP_B: + reg |= TRANS_DP_PORT_SEL_B; + break; + case PCH_DP_C: + reg |= TRANS_DP_PORT_SEL_C; + break; + case PCH_DP_D: + reg |= TRANS_DP_PORT_SEL_D; + break; + default: + DRM_DEBUG_KMS("Wrong PCH DP port return. Guess port B\n"); + reg |= TRANS_DP_PORT_SEL_B; + break; + } + + I915_WRITE(trans_dp_ctl, reg); + POSTING_READ(trans_dp_ctl); + } + /* enable PCH transcoder */ temp = I915_READ(transconf_reg); /* @@ -2013,6 +2046,14 @@ static void ironlake_crtc_dpms(struct drm_crtc *crtc, int mode) udelay(100); if (HAS_PCH_CPT(dev)) { + /* disable TRANS_DP_CTL */ + int trans_dp_ctl = (pipe == 0) ? TRANS_DP_CTL_A : TRANS_DP_CTL_B; + int reg; + + reg = I915_READ(trans_dp_ctl); + reg &= ~(TRANS_DP_OUTPUT_ENABLE | TRANS_DP_PORT_SEL_MASK); + I915_WRITE(trans_dp_ctl, reg); + POSTING_READ(trans_dp_ctl); /* disable DPLL_SEL */ temp = I915_READ(PCH_DPLL_SEL); |