The global integrated clock source bit resides in DPLL B on VLV, but we were treating it as a per-pipe resource. It needs to be set whenever any PLL is active, so pull setting the bit out of vlv_update_pll and into vlv_enable_pll. Also add a vlv_disable_pll to prevent disabling it when pipe B shuts down.
I'm guessing on the references here, I expect this to bite any config where multiple displays are active or displays are moved from pipe to pipe. References: https://bugs.freedesktop.org/show_bug.cgi?id=67245 References: https://bugs.freedesktop.org/show_bug.cgi?id=69693 Signed-off-by: Jesse Barnes <jbar...@virtuousgeek.org> --- drivers/gpu/drm/i915/intel_display.c | 27 ++++++++++++++++++++++++--- 1 file changed, 24 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 0eeba84..def2473 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -1386,6 +1386,13 @@ static void vlv_enable_pll(struct intel_crtc *crtc) if (IS_MOBILE(dev_priv->dev) && !IS_I830(dev_priv->dev)) assert_panel_unlocked(dev_priv, crtc->pipe); + /* Make sure to use the integrated clock source */ + if (!crtc->pipe) + I915_WRITE(DPLL(1), I915_READ(DPLL(1)) | + DPLL_INTEGRATED_CRI_CLK_VLV); + else + dpll |= DPLL_INTEGRATED_CRI_CLK_VLV; + I915_WRITE(reg, dpll); POSTING_READ(reg); udelay(150); @@ -1476,6 +1483,20 @@ static void i9xx_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe) POSTING_READ(DPLL(pipe)); } +static void vlv_disable_pll(struct drm_i915_private *dev_priv, enum pipe pipe) +{ + u32 val = 0; + + /* Make sure the pipe isn't still relying on us */ + assert_pipe_disabled(dev_priv, pipe); + + /* Leave integrated clock source enabled for the other pipe */ + if (pipe) + val = I915_READ(DPLL(pipe)) & DPLL_INTEGRATED_CRI_CLK_VLV; + I915_WRITE(DPLL(pipe), val); + POSTING_READ(DPLL(pipe)); +} + void vlv_wait_port_ready(struct drm_i915_private *dev_priv, int port) { u32 port_mask; @@ -3886,7 +3907,9 @@ static void i9xx_crtc_disable(struct drm_crtc *crtc) if (encoder->post_disable) encoder->post_disable(encoder); - if (!intel_pipe_has_type(crtc, INTEL_OUTPUT_DSI)) + if (IS_VALLEYVIEW(dev) && !intel_pipe_has_type(crtc, INTEL_OUTPUT_DSI)) + vlv_disable_pll(dev_priv, pipe); + else if (!IS_VALLEYVIEW(dev)) i9xx_disable_pll(dev_priv, pipe); intel_crtc->active = false; @@ -4626,8 +4649,6 @@ static void vlv_update_pll(struct intel_crtc *crtc) /* Enable DPIO clock input */ dpll = DPLL_EXT_BUFFER_ENABLE_VLV | DPLL_REFA_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS | DPLL_INTEGRATED_CLOCK_VLV; - if (pipe) - dpll |= DPLL_INTEGRATED_CRI_CLK_VLV; dpll |= DPLL_VCO_ENABLE; crtc->config.dpll_hw_state.dpll = dpll; -- 1.8.3.1 _______________________________________________ Intel-gfx mailing list Intel-gfx@lists.freedesktop.org http://lists.freedesktop.org/mailman/listinfo/intel-gfx
