From: Ville Syrjälä Date: Wed, 3 Jun 2015 12:45:10 +0000 (+0300) Subject: drm/i915: Store max cdclk value in dev_priv X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=44913155f036ae966f09a7bc0d299c31876b4383;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/i915: Store max cdclk value in dev_priv Keep the cdclk maximum supported frequency around in dev_priv so that we can verify certain things against it before actually changing the cdclk frequency. For now only VLV/CHV have support changing cdclk frequency, so other plarforms get to assume cdclk is fixed. v2: Rebased to the latest v3: Rebased to the latest v4: Fix for patch style problems Signed-off-by: Ville Syrjälä Signed-off-by: Mika Kahola Reviewed-by: Damien Lespiau Signed-off-by: Jani Nikula --- diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h index 60aa9626f91f..db9e268629b2 100644 --- a/drivers/gpu/drm/i915/i915_drv.h +++ b/drivers/gpu/drm/i915/i915_drv.h @@ -1743,7 +1743,7 @@ struct drm_i915_private { unsigned int fsb_freq, mem_freq, is_ddr3; unsigned int skl_boot_cdclk; - unsigned int cdclk_freq; + unsigned int cdclk_freq, max_cdclk_freq; unsigned int hpll_freq; /** diff --git a/drivers/gpu/drm/i915/intel_display.c b/drivers/gpu/drm/i915/intel_display.c index d1dd8abaf1f1..445385dd062a 100644 --- a/drivers/gpu/drm/i915/intel_display.c +++ b/drivers/gpu/drm/i915/intel_display.c @@ -5747,6 +5747,21 @@ static int valleyview_get_vco(struct drm_i915_private *dev_priv) return vco_freq[hpll_freq] * 1000; } +static void intel_update_max_cdclk(struct drm_device *dev) +{ + struct drm_i915_private *dev_priv = dev->dev_private; + + if (IS_VALLEYVIEW(dev)) { + dev_priv->max_cdclk_freq = 400000; + } else { + /* otherwise assume cdclk is fixed */ + dev_priv->max_cdclk_freq = dev_priv->cdclk_freq; + } + + DRM_DEBUG_DRIVER("Max CD clock rate: %d kHz\n", + dev_priv->max_cdclk_freq); +} + static void intel_update_cdclk(struct drm_device *dev) { struct drm_i915_private *dev_priv = dev->dev_private; @@ -5768,6 +5783,9 @@ static void intel_update_cdclk(struct drm_device *dev) */ I915_WRITE(GMBUSFREQ_VLV, DIV_ROUND_UP(dev_priv->cdclk_freq, 1000)); } + + if (dev_priv->max_cdclk_freq == 0) + intel_update_max_cdclk(dev); } /* Adjust CDclk dividers to allow high res or save power if possible */ @@ -6610,7 +6628,7 @@ static int intel_crtc_compute_config(struct intel_crtc *crtc, /* FIXME should check pixel clock limits on all platforms */ if (INTEL_INFO(dev)->gen < 4) { - int clock_limit = dev_priv->cdclk_freq; + int clock_limit = dev_priv->max_cdclk_freq; /* * Enable pixel doubling when the dot clock