drm/i915/hdmi: HDMI source product description infoframe support

Set an SPD infoframe if the sink supports it.

Signed-off-by: Jesse Barnes <jbarnes@virtuousgeek.org>
Signed-off-by: Keith Packard <keithp@keithp.com>

1 files changed, 16 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index d43cebdea1ee..226ba830f383 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -201,6 +201,21 @@ static void intel_hdmi_set_avi_infoframe(struct drm_encoder *encoder)
         intel_set_infoframe(encoder, &avi_if);
 }
 
+static void intel_hdmi_set_spd_infoframe(struct drm_encoder *encoder)
+{
+        struct dip_infoframe spd_if;
+
+        memset(&spd_if, 0, sizeof(spd_if));
+        spd_if.type = DIP_TYPE_SPD;
+        spd_if.ver = DIP_VERSION_SPD;
+        spd_if.len = DIP_LEN_SPD;
+        strcpy(spd_if.body.spd.vn, "Intel");
+        strcpy(spd_if.body.spd.pd, "Integrated gfx");
+        spd_if.body.spd.sdi = DIP_SPD_PC;
+
+        intel_set_infoframe(encoder, &spd_if);
+}
+
 static void intel_hdmi_mode_set(struct drm_encoder *encoder,
                                 struct drm_display_mode *mode,
                                 struct drm_display_mode *adjusted_mode)
@@ -245,6 +260,7 @@ static void intel_hdmi_mode_set(struct drm_encoder *encoder,
         POSTING_READ(intel_hdmi->sdvox_reg);
 
         intel_hdmi_set_avi_infoframe(encoder);
+        intel_hdmi_set_spd_infoframe(encoder);
 }
 
 static void intel_hdmi_dpms(struct drm_encoder *encoder, int mode)