From: Jesse Barnes Date: Wed, 11 May 2011 16:42:30 +0000 (-0700) Subject: drm/i915: add Ivybridge clock gating init function X-Git-Tag: v3.0-rc1~312^2~4^2~1 X-Git-Url: https://git.karo-electronics.de/?a=commitdiff_plain;h=28963a3eb5e2ae861995c2f7c15c7de982b3ce0e;p=karo-tx-linux.git drm/i915: add Ivybridge clock gating init function Some of the bits have changed, including one we were setting that enables a VGA test mode, preventing pipe B from working at all. So add a new IVB specific function with the right bits. Signed-off-by: Jesse Barnes Reviewed-by: Keith Packard Signed-off-by: Keith Packard --- diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h index f1bc0fb6a72c..160903adf706 100644 --- a/drivers/gpu/drm/i915/i915_reg.h +++ b/drivers/gpu/drm/i915/i915_reg.h @@ -2825,6 +2825,7 @@ #define ILK_eDP_A_DISABLE (1<<24) #define ILK_DESKTOP (1<<23) #define ILK_DSPCLK_GATE 0x42020 +#define IVB_VRHUNIT_CLK_GATE (1<<28) #define ILK_DPARB_CLK_GATE (1<<5) #define ILK_DPFD_CLK_GATE (1<<7) diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index 7eeffaf775ed..b8b4a2e4bbb0 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -7336,6 +7336,33 @@ static void gen6_init_clock_gating(struct drm_device *dev) DISPPLANE_TRICKLE_FEED_DISABLE); } +static void ivybridge_init_clock_gating(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + int pipe; + uint32_t dspclk_gate = VRHUNIT_CLOCK_GATE_DISABLE; + + 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); + + I915_WRITE(ILK_DSPCLK_GATE, IVB_VRHUNIT_CLK_GATE); + + for_each_pipe(pipe) + I915_WRITE(DSPCNTR(pipe), + I915_READ(DSPCNTR(pipe)) | + DISPPLANE_TRICKLE_FEED_DISABLE); +} + static void g4x_init_clock_gating(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -7603,7 +7630,7 @@ static void intel_init_display(struct drm_device *dev) "Disable CxSR\n"); dev_priv->display.update_wm = NULL; } - dev_priv->display.init_clock_gating = gen6_init_clock_gating; + dev_priv->display.init_clock_gating = ivybridge_init_clock_gating; } else dev_priv->display.update_wm = NULL;