On 3/20/2019 4:18 PM, Uma Shankar wrote:
From: Ville Syrjälä <ville.syrj...@linux.intel.com>

This patch enables infoframes on GLK+ to be
used to send HDR metadata to HDMI sink.

v2: Addressed Shashank's review comment.

Signed-off-by: Ville Syrjälä <ville.syrj...@linux.intel.com>
Signed-off-by: Uma Shankar <uma.shan...@intel.com>
---
  drivers/gpu/drm/i915/i915_reg.h   |  4 ++++
  drivers/gpu/drm/i915/intel_hdmi.c | 18 +++++++++++++-----
  2 files changed, 17 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index 31a3020..fe931e7 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -4718,6 +4718,7 @@ enum {
  #define   VIDEO_DIP_FREQ_MASK         (3 << 16)
  /* HSW and later: */
  #define   DRM_DIP_ENABLE              (1 << 28)
+#define   VIDEO_DIP_ENABLE_DRM_GLK     (1 << 28)
  #define   PSR_VSC_BIT_7_SET           (1 << 27)
  #define   VSC_SELECT_MASK             (0x3 << 25)
  #define   VSC_SELECT_SHIFT            25
@@ -8156,6 +8157,7 @@ enum {
  #define _HSW_VIDEO_DIP_SPD_DATA_A     0x602A0
  #define _HSW_VIDEO_DIP_GMP_DATA_A     0x602E0
  #define _HSW_VIDEO_DIP_VSC_DATA_A     0x60320
+#define _GLK_VIDEO_DIP_DRM_DATA_A      0x60440
  #define _HSW_VIDEO_DIP_AVI_ECC_A      0x60240
  #define _HSW_VIDEO_DIP_VS_ECC_A               0x60280
  #define _HSW_VIDEO_DIP_SPD_ECC_A      0x602C0
@@ -8169,6 +8171,7 @@ enum {
  #define _HSW_VIDEO_DIP_SPD_DATA_B     0x612A0
  #define _HSW_VIDEO_DIP_GMP_DATA_B     0x612E0
  #define _HSW_VIDEO_DIP_VSC_DATA_B     0x61320
+#define _GLK_VIDEO_DIP_DRM_DATA_B      0x61440
  #define _HSW_VIDEO_DIP_BVI_ECC_B      0x61240
  #define _HSW_VIDEO_DIP_VS_ECC_B               0x61280
  #define _HSW_VIDEO_DIP_SPD_ECC_B      0x612C0
@@ -8194,6 +8197,7 @@ enum {
  #define HSW_TVIDEO_DIP_SPD_DATA(trans, i)     _MMIO_TRANS2(trans, 
_HSW_VIDEO_DIP_SPD_DATA_A + (i) * 4)
  #define HSW_TVIDEO_DIP_GMP_DATA(trans, i)     _MMIO_TRANS2(trans, 
_HSW_VIDEO_DIP_GMP_DATA_A + (i) * 4)
  #define HSW_TVIDEO_DIP_VSC_DATA(trans, i)     _MMIO_TRANS2(trans, 
_HSW_VIDEO_DIP_VSC_DATA_A + (i) * 4)
+#define GLK_TVIDEO_DIP_DRM_DATA(trans, i)      _MMIO_TRANS2(trans, 
_GLK_VIDEO_DIP_DRM_DATA_A + (i) * 4)
  #define ICL_VIDEO_DIP_PPS_DATA(trans, i)      _MMIO_TRANS2(trans, 
_ICL_VIDEO_DIP_PPS_DATA_A + (i) * 4)
  #define ICL_VIDEO_DIP_PPS_ECC(trans, i)               _MMIO_TRANS2(trans, 
_ICL_VIDEO_DIP_PPS_ECC_A + (i) * 4)
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index e4bc7fc..8decafd 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -134,6 +134,8 @@ static u32 hsw_infoframe_enable(unsigned int type)
                return VIDEO_DIP_ENABLE_SPD_HSW;
        case HDMI_INFOFRAME_TYPE_VENDOR:
                return VIDEO_DIP_ENABLE_VS_HSW;
+       case HDMI_INFOFRAME_TYPE_DRM:
+               return VIDEO_DIP_ENABLE_DRM_GLK;
        default:
                MISSING_CASE(type);
                return 0;
@@ -159,6 +161,8 @@ static u32 hsw_infoframe_enable(unsigned int type)
                return HSW_TVIDEO_DIP_SPD_DATA(cpu_transcoder, i);
        case HDMI_INFOFRAME_TYPE_VENDOR:
                return HSW_TVIDEO_DIP_VS_DATA(cpu_transcoder, i);
+       case HDMI_INFOFRAME_TYPE_DRM:
+               return GLK_TVIDEO_DIP_DRM_DATA(cpu_transcoder, i);
        default:
                MISSING_CASE(type);
                return INVALID_MMIO_REG;
@@ -545,7 +549,8 @@ static u32 hsw_infoframes_enabled(struct intel_encoder 
*encoder,
return val & (VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_AVI_HSW |
                      VIDEO_DIP_ENABLE_GCP_HSW | VIDEO_DIP_ENABLE_VS_HSW |
-                     VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW);
+                     VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW |
+                     VIDEO_DIP_ENABLE_DRM_GLK);
I think this should also be GEN check protected, as hsw_infoframes_enabled will be called by many platforms, and before GLK they cant support DRM_IF.
  }
static const u8 infoframe_type_to_idx[] = {
@@ -1177,7 +1182,8 @@ static void hsw_set_infoframes(struct intel_encoder 
*encoder,
val &= ~(VIDEO_DIP_ENABLE_VSC_HSW | VIDEO_DIP_ENABLE_AVI_HSW |
                 VIDEO_DIP_ENABLE_GCP_HSW | VIDEO_DIP_ENABLE_VS_HSW |
-                VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW);
+                VIDEO_DIP_ENABLE_GMP_HSW | VIDEO_DIP_ENABLE_SPD_HSW |
+                VIDEO_DIP_ENABLE_DRM_GLK);

Same here.

- Shashank

if (!enable) {
                I915_WRITE(reg, val);
@@ -1200,9 +1206,11 @@ static void hsw_set_infoframes(struct intel_encoder 
*encoder,
        intel_write_infoframe(encoder, crtc_state,
                              HDMI_INFOFRAME_TYPE_VENDOR,
                              &crtc_state->infoframes.hdmi);
-       intel_write_infoframe(encoder, crtc_state,
-                             HDMI_INFOFRAME_TYPE_DRM,
-                             &crtc_state->infoframes.drm);
+       if ((INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) &&
+           conn_state->hdr_metadata_changed)
+               intel_write_infoframe(encoder, crtc_state,
+                                     HDMI_INFOFRAME_TYPE_DRM,
+                                     &crtc_state->infoframes.drm);
  }
void intel_dp_dual_mode_set_tmds_output(struct intel_hdmi *hdmi, bool enable)
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