drm/i915: add opregion function to notify bios of encoder enable/disable
The bios interface seems messy, and it's hard to tell what the bios
really wants. At first, only add support for DDI based machines (hsw+),
and see how it turns out.
The spec says to notify prior to power down and after power up. It is
unclear whether it makes a difference.
v2:
- squash notification function and callers patches together (Daniel)
- move callers to haswell_crtc_{enable,disable} (Daniel)
- rename notification function (Chris)
v3:
- separate notification function and callers again, as it's not clear
whether the display power state notification is the right thing to do
after all
v4: per Paulo's review:
- drop LVDS
- WARN on unsupported encoder types
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
diff --git a/drivers/gpu/drm/i915/intel_opregion.c b/drivers/gpu/drm/i915/intel_opregion.c
index c45fec5..ce1c79e 100644
--- a/drivers/gpu/drm/i915/intel_opregion.c
+++ b/drivers/gpu/drm/i915/intel_opregion.c
@@ -291,6 +291,57 @@
#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;