From 5a8fbb7d192b96de3d258164e5fc95b769d698c3 Mon Sep 17 00:00:00 2001 From: =?utf8?q?Ville=20Syrj=C3=A4l=C3=A4?= Date: Mon, 29 Jun 2015 15:25:53 +0300 Subject: [PATCH] drm/i915: Move DPLL ref/cri/VGA mode frobbing to the disp2d well enable MIME-Version: 1.0 Content-Type: text/plain; charset=utf8 Content-Transfer-Encoding: 8bit Bunch of stuff needs the DPLL ref/cri clocks on both VLV and CHV, and having VGA mode enabled causes some problems for CHV. So let's just pull the code to configure those bits into the disp2d well enable hook. With the DPLL disable code also fixed to leave those bits alone we should now have a consistent DPLL state all the time even if the DPLL is disabled. This also neatly removes some duplicated code between the VLV and CHV codepaths. Signed-off-by: Ville Syrjälä Reviewed-by: Sivakumar Thulasimani Signed-off-by: Daniel Vetter --- drivers/gpu/drm/i915/intel_runtime_pm.c | 45 ++++++++++++++++++--------------- 1 file changed, 24 insertions(+), 21 deletions(-) diff --git a/drivers/gpu/drm/i915/intel_runtime_pm.c b/drivers/gpu/drm/i915/intel_runtime_pm.c index 974c4cb..0588baa 100644 --- a/drivers/gpu/drm/i915/intel_runtime_pm.c +++ b/drivers/gpu/drm/i915/intel_runtime_pm.c @@ -853,6 +853,25 @@ static bool vlv_power_well_enabled(struct drm_i915_private *dev_priv, static void vlv_display_power_well_init(struct drm_i915_private *dev_priv) { + enum pipe pipe; + + /* + * Enable the CRI clock source so we can get at the + * display and the reference clock for VGA + * hotplug / manual detection. Supposedly DSI also + * needs the ref clock up and running. + * + * CHV DPLL B/C have some issues if VGA mode is enabled. + */ + for_each_pipe(dev_priv->dev, pipe) { + u32 val = I915_READ(DPLL(pipe)); + + val |= DPLL_REF_CLK_ENABLE_VLV | DPLL_VGA_MODE_DIS; + if (pipe != PIPE_A) + val |= DPLL_INTEGRATED_CRI_CLK_VLV; + + I915_WRITE(DPLL(pipe), val); + } spin_lock_irq(&dev_priv->irq_lock); valleyview_enable_display_irqs(dev_priv); @@ -904,13 +923,7 @@ static void vlv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, { WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC); - /* - * Enable the CRI clock source so we can get at the - * display and the reference clock for VGA - * hotplug / manual detection. - */ - I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) | DPLL_VGA_MODE_DIS | - DPLL_REF_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV); + /* since ref/cri clock was enabled */ udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ vlv_set_power_well(dev_priv, power_well, true); @@ -953,22 +966,12 @@ static void chv_dpio_cmn_power_well_enable(struct drm_i915_private *dev_priv, WARN_ON_ONCE(power_well->data != PUNIT_POWER_WELL_DPIO_CMN_BC && power_well->data != PUNIT_POWER_WELL_DPIO_CMN_D); - /* - * Enable the CRI clock source so we can get at the - * display and the reference clock for VGA - * hotplug / manual detection. - */ - if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) { + if (power_well->data == PUNIT_POWER_WELL_DPIO_CMN_BC) phy = DPIO_PHY0; - I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) | DPLL_VGA_MODE_DIS | - DPLL_REF_CLK_ENABLE_VLV); - I915_WRITE(DPLL(PIPE_B), I915_READ(DPLL(PIPE_B)) | DPLL_VGA_MODE_DIS | - DPLL_REF_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV); - } else { + else phy = DPIO_PHY1; - I915_WRITE(DPLL(PIPE_C), I915_READ(DPLL(PIPE_C)) | DPLL_VGA_MODE_DIS | - DPLL_REF_CLK_ENABLE_VLV | DPLL_INTEGRATED_CRI_CLK_VLV); - } + + /* since ref/cri clock was enabled */ udelay(1); /* >10ns for cmnreset, >0ns for sidereset */ vlv_set_power_well(dev_priv, power_well, true); -- 2.7.4