drm/i915: add opregion function to notify bios of encoder enable/disable

[platform/adaptation/renesas_rcar/renesas_kernel.git] / drivers / gpu / drm / i915 / intel_opregion.c

diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index c45fec5..ce1c79e 100644 (file)
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -291,6 +291,57 @@ static int swsci(struct drm_device *dev, u32 function, u32 parm, u32 *parm_out)
 #undef C
 }
 
+#define DISPLAY_TYPE_CRT                       0
+#define DISPLAY_TYPE_TV                                1
+#define DISPLAY_TYPE_EXTERNAL_FLAT_PANEL       2
+#define DISPLAY_TYPE_INTERNAL_FLAT_PANEL       3
+
+int intel_opregion_notify_encoder(struct intel_encoder *intel_encoder,
+                                 bool enable)
+{
+       struct drm_device *dev = intel_encoder->base.dev;
+       u32 parm = 0;
+       u32 type = 0;
+       u32 port;
+
+       /* don't care about old stuff for now */
+       if (!HAS_DDI(dev))
+               return 0;
+
+       port = intel_ddi_get_encoder_port(intel_encoder);
+       if (port == PORT_E) {
+               port = 0;
+       } else {
+               parm |= 1 << port;
+               port++;
+       }
+
+       if (!enable)
+               parm |= 4 << 8;
+
+       switch (intel_encoder->type) {
+       case INTEL_OUTPUT_ANALOG:
+               type = DISPLAY_TYPE_CRT;
+               break;
+       case INTEL_OUTPUT_UNKNOWN:
+       case INTEL_OUTPUT_DISPLAYPORT:
+       case INTEL_OUTPUT_HDMI:
+               type = DISPLAY_TYPE_EXTERNAL_FLAT_PANEL;
+               break;
+       case INTEL_OUTPUT_EDP:
+               type = DISPLAY_TYPE_INTERNAL_FLAT_PANEL;
+               break;
+       default:
+               WARN_ONCE(1, "unsupported intel_encoder type %d\n",
+                         intel_encoder->type);
+               return -EINVAL;
+       }
+
+       parm |= type << (16 + port * 3);
+
+       return swsci(dev, SWSCI_SBCB_DISPLAY_POWER_STATE, parm, NULL);
+}
+
 static u32 asle_set_backlight(struct drm_device *dev, u32 bclp)
 {
        struct drm_i915_private *dev_priv = dev->dev_private;