[v8 05/10] drm/i915: Write HDR infoframe and send to panel

Uma Shankar
2019-04-09T16:44:39Z

Enable writing of HDR metadata infoframe to panel.
The data will be provid by usersapace compositors, based
on blending policies and passsed to driver through a blob
property.

v2: Rebase

v3: Fixed a warning message

v4: Addressed Shashank's review comments

v5: Rebase. Added infoframe calculation in compute config.

v6: Addressed Shashank's review comment. Added HDR metadata
support from GEN10 onwards as per Shashank's recommendation.

v7: Addressed Shashank's review comments

v8: Added Shashank's RB.

Signed-off-by: Uma Shankar <uma.shankar@intel.com>
Reviewed-by: Shashank Sharma <shashank.sharma@intel.com>
---
drivers/gpu/drm/i915/intel_drv.h | 1 +
drivers/gpu/drm/i915/intel_hdmi.c | 48 +++++++++++++++++++++++++++++++++++++++
2 files changed, 49 insertions(+)

diff --git a/drivers/gpu/drm/i915/intel_drv.h b/drivers/gpu/drm/i915/intel_drv.h
index a38b9cf..6a9d132 100644
--- a/drivers/gpu/drm/i915/intel_drv.h
+++ b/drivers/gpu/drm/i915/intel_drv.h
@@ -1051,6 +1051,7 @@ struct intel_crtc_state {
union hdmi_infoframe avi;
union hdmi_infoframe spd;
union hdmi_infoframe hdmi;
+ union hdmi_infoframe drm;
} infoframes;

/* HDMI scrambling status */
diff --git a/drivers/gpu/drm/i915/intel_hdmi.c b/drivers/gpu/drm/i915/intel_hdmi.c
index d9851da..40d55b0 100644
--- a/drivers/gpu/drm/i915/intel_hdmi.c
+++ b/drivers/gpu/drm/i915/intel_hdmi.c
@@ -566,6 +566,7 @@ static u32 hsw_infoframes_enabled(struct intel_encoder *encoder,
HDMI_INFOFRAME_TYPE_AVI,
HDMI_INFOFRAME_TYPE_SPD,
HDMI_INFOFRAME_TYPE_VENDOR,
+ HDMI_INFOFRAME_TYPE_DRM,
};

u32 intel_hdmi_infoframe_enable(unsigned int type)
@@ -788,6 +789,30 @@ void intel_read_infoframe(struct intel_encoder *encoder,
return true;
}

+static bool
+intel_hdmi_compute_drm_infoframe(struct intel_encoder *encoder,
+ struct intel_crtc_state *crtc_state,
+ struct drm_connector_state *conn_state)
+{
+ struct hdmi_drm_infoframe *frame = &crtc_state->infoframes.drm.drm;
+ struct hdr_output_metadata *hdr_metadata;
+ int ret;
+
+ hdr_metadata = (struct hdr_output_metadata *)
+ conn_state->hdr_output_metadata_blob_ptr->data;
+
+ ret = drm_hdmi_infoframe_set_hdr_metadata(frame, hdr_metadata);
+ if (ret < 0) {
+ DRM_ERROR("couldn't set HDR metadata in infoframe\n");
+ return false;
+ }
+
+ crtc_state->infoframes.enable |=
+ intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_DRM);
+
+ return true;
+}
+
static void g4x_set_infoframes(struct intel_encoder *encoder,
bool enable,
const struct intel_crtc_state *crtc_state,
@@ -1186,6 +1211,16 @@ static void hsw_set_infoframes(struct intel_encoder *encoder,
intel_write_infoframe(encoder, crtc_state,
HDMI_INFOFRAME_TYPE_VENDOR,
&crtc_state->infoframes.hdmi);
+
+ /*
+ * Support HDR Metadata from Gen10 onwards
+ * ToDo: Gen9 also can support HDR with LSPCON.
+ * Support for the same to be enabled later.
+ */
+ if (INTEL_GEN(dev_priv) >= 10)
+ 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)
@@ -2392,6 +2427,19 @@ int intel_hdmi_compute_config(struct intel_encoder *encoder,
return -EINVAL;
}

+ /*
+ * Support HDR Metadata from Gen10 onwards
+ * ToDo: Gen9 also can support HDR with LSPCON.
+ * Support for the same to be enabled later.
+ */
+ if (INTEL_GEN(dev_priv) >= 10 || IS_GEMINILAKE(dev_priv)) {
+ if (!intel_hdmi_compute_drm_infoframe(encoder, pipe_config,
+ conn_state)) {
+ DRM_DEBUG_KMS("bad DRM infoframe\n");
+ return -EINVAL;
+ }
+ }
+
return 0;
}

--
1.9.1

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