From 645c62a5e95a5f9a8e0d0627446bbda4ee042024 Mon Sep 17 00:00:00 2001 From: Jesse Barnes Date: Wed, 11 May 2011 09:49:31 -0700 Subject: [PATCH] drm/i915: split PCH clock gating init Ibex Peak and CougarPoint already require a different setting (added here), and future chips will likely follow that precedent. Signed-off-by: Jesse Barnes Reviewed-by: Keith Packard Signed-off-by: Keith Packard --- drivers/gpu/drm/i915/i915_drv.h | 1 + drivers/gpu/drm/i915/i915_reg.h | 3 ++ drivers/gpu/drm/i915/i915_suspend.c | 3 +- drivers/gpu/drm/i915/intel_display.c | 63 ++++++++++++++++++---------- drivers/gpu/drm/i915/intel_drv.h | 2 + 5 files changed, 48 insertions(+), 24 deletions(-) diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 581395e581eb..3a1c27718065 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -210,6 +210,7 @@ struct drm_i915_display_funcs { struct drm_framebuffer *old_fb); void (*fdi_link_train)(struct drm_crtc *crtc); void (*init_clock_gating)(struct drm_device *dev); + void (*init_pch_clock_gating)(struct drm_device *dev); /* clock updates for mode set */ /* cursor updates */ /* render clock increase/decrease */ diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index 160903adf706..2f967af8e62e 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -3074,6 +3074,9 @@ #define TRANS_6BPC (2<<5) #define TRANS_12BPC (3<<5) +#define SOUTH_CHICKEN2 0xc2004 +#define DPLS_EDP_PPS_FIX_DIS (1<<0) + #define _FDI_RXA_CHICKEN 0xc200c #define _FDI_RXB_CHICKEN 0xc2010 #define FDI_RX_PHASE_SYNC_POINTER_OVR (1<<1) diff --git a/drivers/gpu/drm/i915/i915_suspend.c b/drivers/gpu/drm/i915/i915_suspend.c index 6cb27ff51891..60a94d2b5264 100644 --- a/drivers/gpu/drm/i915/i915_suspend.c +++ b/drivers/gpu/drm/i915/i915_suspend.c @@ -863,8 +863,7 @@ int i915_restore_state(struct drm_device *dev) I915_WRITE(IMR, dev_priv->saveIMR); } - /* Clock gating state */ - dev_priv->display.init_clock_gating(dev); + intel_init_clock_gating(dev); if (IS_IRONLAKE_M(dev)) { ironlake_enable_drps(dev); diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index b8b4a2e4bbb0..5ec74df2627e 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7231,13 +7231,6 @@ static void ironlake_init_clock_gating(struct drm_device *dev) I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate); - /* - * On Ibex Peak and Cougar Point, we need to disable clock - * gating for the panel power sequencer or it will fail to - * start up when no ports are active. - */ - I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); - /* * According to the spec the following bits should be set in * order to enable memory self-refresh @@ -7295,13 +7288,6 @@ static void gen6_init_clock_gating(struct drm_device *dev) I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate); - /* - * On Ibex Peak and Cougar Point, we need to disable clock - * gating for the panel power sequencer or it will fail to - * start up when no ports are active. - */ - I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); - I915_WRITE(ILK_DISPLAY_CHICKEN2, I915_READ(ILK_DISPLAY_CHICKEN2) | ILK_ELPIN_409_SELECT); @@ -7344,13 +7330,6 @@ static void ivybridge_init_clock_gating(struct drm_device *dev) I915_WRITE(PCH_DSPCLK_GATE_D, dspclk_gate); - /* - * On Ibex Peak and Cougar Point, we need to disable clock - * gating for the panel power sequencer or it will fail to - * start up when no ports are active. - */ - I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); - I915_WRITE(WM3_LP_ILK, 0); I915_WRITE(WM2_LP_ILK, 0); I915_WRITE(WM1_LP_ILK, 0); @@ -7428,6 +7407,32 @@ static void i830_init_clock_gating(struct drm_device *dev) I915_WRITE(DSPCLK_GATE_D, OVRUNIT_CLOCK_GATE_DISABLE); } +static void ibx_init_clock_gating(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + /* + * On Ibex Peak and Cougar Point, we need to disable clock + * gating for the panel power sequencer or it will fail to + * start up when no ports are active. + */ + I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); +} + +static void cpt_init_clock_gating(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + /* + * On Ibex Peak and Cougar Point, we need to disable clock + * gating for the panel power sequencer or it will fail to + * start up when no ports are active. + */ + I915_WRITE(SOUTH_DSPCLK_GATE_D, PCH_DPLSUNIT_CLOCK_GATE_DISABLE); + I915_WRITE(SOUTH_CHICKEN2, I915_READ(SOUTH_CHICKEN2) | + DPLS_EDP_PPS_FIX_DIS); +} + static void ironlake_teardown_rc6(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -7543,6 +7548,15 @@ void ironlake_enable_rc6(struct drm_device *dev) mutex_unlock(&dev->struct_mutex); } +void intel_init_clock_gating(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + dev_priv->display.init_clock_gating(dev); + + if (dev_priv->display.init_pch_clock_gating) + dev_priv->display.init_pch_clock_gating(dev); +} /* Set up chip specific display functions */ static void intel_init_display(struct drm_device *dev) @@ -7600,6 +7614,11 @@ static void intel_init_display(struct drm_device *dev) /* For FIFO watermark updates */ if (HAS_PCH_SPLIT(dev)) { + if (HAS_PCH_IBX(dev)) + dev_priv->display.init_pch_clock_gating = ibx_init_clock_gating; + else if (HAS_PCH_CPT(dev)) + dev_priv->display.init_pch_clock_gating = cpt_init_clock_gating; + if (IS_GEN5(dev)) { if (I915_READ(MLTR_ILK) & ILK_SRLT_MASK) dev_priv->display.update_wm = ironlake_update_wm; @@ -7802,7 +7821,7 @@ void intel_modeset_init(struct drm_device *dev) i915_disable_vga(dev); intel_setup_outputs(dev); - dev_priv->display.init_clock_gating(dev); + intel_init_clock_gating(dev); if (IS_IRONLAKE_M(dev)) { ironlake_enable_drps(dev); diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h index 2e49b62da9a5..831d7a4a0d18 100644 --- a/drivers/gpu/drm/i915/intel_drv.h +++ b/drivers/gpu/drm/i915/intel_drv.h @@ -344,4 +344,6 @@ extern int intel_overlay_attrs(struct drm_device *dev, void *data, extern void intel_fb_output_poll_changed(struct drm_device *dev); extern void intel_fb_restore_mode(struct drm_device *dev); + +extern void intel_init_clock_gating(struct drm_device *dev); #endif /* __INTEL_DRV_H__ */ -- 2.20.1