drm/i915: fix hdmi portclock limits

[deliverable/linux.git] / drivers / gpu / drm / i915 / intel_hdmi.c

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index 98df2a0c85bdf43f9ed545489700470392b11ca1..2fd3fd5b943ee57aff93415c707798d9069cea7e 100644 (file)
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -785,10 +785,22 @@ static void intel_disable_hdmi(struct intel_encoder *encoder)
        }
 }
 
+static int hdmi_portclock_limit(struct intel_hdmi *hdmi)
+{
+       struct drm_device *dev = intel_hdmi_to_dev(hdmi);
+
+       if (IS_G4X(dev))
+               return 165000;
+       else if (IS_HASWELL(dev))
+               return 300000;
+       else
+               return 225000;
+}
+
 static int intel_hdmi_mode_valid(struct drm_connector *connector,
                                 struct drm_display_mode *mode)
 {
-       if (mode->clock > 165000)
+       if (mode->clock > hdmi_portclock_limit(intel_attached_hdmi(connector)))
                return MODE_CLOCK_HIGH;
        if (mode->clock < 20000)
                return MODE_CLOCK_LOW;
@@ -806,6 +818,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
        struct drm_device *dev = encoder->base.dev;
        struct drm_display_mode *adjusted_mode = &pipe_config->adjusted_mode;
        int clock_12bpc = pipe_config->requested_mode.clock * 3 / 2;
+       int portclock_limit = hdmi_portclock_limit(intel_hdmi);
        int desired_bpp;
 
        if (intel_hdmi->color_range_auto) {
@@ -829,7 +842,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
         * outputs. We also need to check that the higher clock still fits
         * within limits.
         */
-       if (pipe_config->pipe_bpp > 8*3 && clock_12bpc <= 225000
+       if (pipe_config->pipe_bpp > 8*3 && clock_12bpc <= portclock_limit
            && HAS_PCH_SPLIT(dev)) {
                DRM_DEBUG_KMS("picking bpc to 12 for HDMI output\n");
                desired_bpp = 12*3;
@@ -846,7 +859,7 @@ bool intel_hdmi_compute_config(struct intel_encoder *encoder,
                pipe_config->pipe_bpp = desired_bpp;
        }
 
-       if (adjusted_mode->clock > 225000) {
+       if (adjusted_mode->clock > portclock_limit) {
                DRM_DEBUG_KMS("too high HDMI clock, rejecting mode\n");
                return false;
        }