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>

2 files changed, 37 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index 2f47dcf0b367..7b330e76a435 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -184,6 +184,22 @@ struct intel_crtc {
 #define DIP_VERSION_AVI 0x2
 #define DIP_LEN_AVI     13
 
+#define DIP_TYPE_SPD    0x3
+#define DIP_VERSION_SPD 0x1
+#define DIP_LEN_SPD     25
+#define DIP_SPD_UNKNOWN 0
+#define DIP_SPD_DSTB    0x1
+#define DIP_SPD_DVDP    0x2
+#define DIP_SPD_DVHS    0x3
+#define DIP_SPD_HDDVR   0x4
+#define DIP_SPD_DVC     0x5
+#define DIP_SPD_DSC     0x6
+#define DIP_SPD_VCD     0x7
+#define DIP_SPD_GAME    0x8
+#define DIP_SPD_PC      0x9
+#define DIP_SPD_BD      0xa
+#define DIP_SPD_SCD     0xb
+
 struct dip_infoframe {
         uint8_t type;           /* HB0 */
         uint8_t ver;            /* HB1 */
@@ -208,6 +224,11 @@ struct dip_infoframe {
                         uint16_t left_bar_end;
                         uint16_t right_bar_start;
                 } avi;
+                struct {
+                        uint8_t vn[8];
+                        uint8_t pd[16];
+                        uint8_t sdi;
+                } spd;
                 uint8_t payload[27];
         } __attribute__ ((packed)) body;
 } __attribute__((packed));
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)