[PATCH v4 6/7] drm/i915/dp: Program an Infoframe SDP Header and DB for HDR Static Metadata
Shankar, Uma
uma.shankar at intel.com
Tue Sep 3 14:30:41 UTC 2019
>-----Original Message-----
>From: Mun, Gwan-gyeong
>Sent: Tuesday, September 3, 2019 2:43 PM
>To: intel-gfx at lists.freedesktop.org
>Cc: dri-devel at lists.freedesktop.org; Shankar, Uma <uma.shankar at intel.com>;
>Sharma, Shashank <shashank.sharma at intel.com>; ville.syrjala at linux.intel.com
>Subject: [PATCH v4 6/7] drm/i915/dp: Program an Infoframe SDP Header and DB for
>HDR Static Metadata
>
>Function intel_dp_setup_hdr_metadata_infoframe_sdp handles Infoframe SDP
>header and data block setup for HDR Static Metadata. It enables writing of HDR
>metadata infoframe SDP to panel. Support for HDR video was introduced in
>DisplayPort 1.4. It implements the CTA-861-G standard for transport of static HDR
>metadata. The HDR Metadata will be provided by userspace compositors, based on
>blending policies and passed to the driver through a blob property.
>
>Because each of GEN11 and prior GEN11 have different register size for HDR
>Metadata Infoframe SDP packet, it adds and uses different register size.
>
>Setup Infoframe SDP header and data block in function
>intel_dp_setup_hdr_metadata_infoframe_sdp for HDR Static Metadata as per dp 1.4
>spec and CTA-861-F spec.
>As per DP 1.4 spec, 2.2.2.5 SDP Formats. It enables Dynamic Range and Mastering
>Infoframe for HDR content, which is defined in CTA-861-F spec.
>According to DP 1.4 spec and CEA-861-F spec Table 5, in order to transmit static HDR
>metadata, we have to use Non-audio INFOFRAME SDP v1.3.
>
>+--------------------------------+-------------------------------+
>| [ Packet Type Value ] | [ Packet Type ] |
>+--------------------------------+-------------------------------+
>| 80h + Non-audio INFOFRAME Type | CEA-861-F Non-audio INFOFRAME |
>+--------------------------------+-------------------------------+
>| [Transmission Timing] |
>+----------------------------------------------------------------+
>| As per CEA-861-F for INFOFRAME, including CEA-861.3 within |
>| which Dynamic Range and Mastering INFOFRAME are defined |
>+----------------------------------------------------------------+
>
>v2: Add a missed blank line after function declaration.
>v3: Remove not handled return values from
> intel_dp_setup_hdr_metadata_infoframe_sdp(). [Uma]
Looks good to me.
Reviewed-by: Uma Shankar <uma.shankar at intel.com>
>Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun at intel.com>
>---
> drivers/gpu/drm/i915/display/intel_ddi.c | 1 +
>drivers/gpu/drm/i915/display/intel_dp.c | 89 ++++++++++++++++++++++++
>drivers/gpu/drm/i915/display/intel_dp.h | 3 +
> 3 files changed, 93 insertions(+)
>
>diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c
>b/drivers/gpu/drm/i915/display/intel_ddi.c
>index 87dc5a19cb7b..111a5c95be85 100644
>--- a/drivers/gpu/drm/i915/display/intel_ddi.c
>+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
>@@ -3612,6 +3612,7 @@ static void intel_enable_ddi_dp(struct intel_encoder
>*encoder,
> intel_edp_backlight_on(crtc_state, conn_state);
> intel_psr_enable(intel_dp, crtc_state);
> intel_dp_vsc_enable(intel_dp, crtc_state, conn_state);
>+ intel_dp_hdr_metadata_enable(intel_dp, crtc_state, conn_state);
> intel_edp_drrs_enable(intel_dp, crtc_state);
>
> if (crtc_state->has_audio)
>diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
>b/drivers/gpu/drm/i915/display/intel_dp.c
>index 9fa107d720ee..7fcc9f28d2e7 100644
>--- a/drivers/gpu/drm/i915/display/intel_dp.c
>+++ b/drivers/gpu/drm/i915/display/intel_dp.c
>@@ -4596,6 +4596,83 @@ intel_dp_setup_vsc_sdp(struct intel_dp *intel_dp,
> crtc_state, DP_SDP_VSC, &vsc_sdp, sizeof(vsc_sdp)); }
>
>+static void
>+intel_dp_setup_hdr_metadata_infoframe_sdp(struct intel_dp *intel_dp,
>+ const struct intel_crtc_state *crtc_state,
>+ const struct drm_connector_state
>*conn_state) {
>+ struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
>+ struct drm_i915_private *dev_priv = to_i915(intel_dig_port->base.base.dev);
>+ struct dp_sdp infoframe_sdp = {};
>+ struct hdmi_drm_infoframe drm_infoframe = {};
>+ const int infoframe_size = HDMI_INFOFRAME_HEADER_SIZE +
>HDMI_DRM_INFOFRAME_SIZE;
>+ unsigned char buf[HDMI_INFOFRAME_HEADER_SIZE +
>HDMI_DRM_INFOFRAME_SIZE];
>+ ssize_t len;
>+ int ret;
>+
>+ ret = drm_hdmi_infoframe_set_hdr_metadata(&drm_infoframe, conn_state);
>+ if (ret) {
>+ DRM_DEBUG_KMS("couldn't set HDR metadata in infoframe\n");
>+ return;
>+ }
>+
>+ len = hdmi_drm_infoframe_pack_only(&drm_infoframe, buf, sizeof(buf));
>+ if (len < 0) {
>+ DRM_DEBUG_KMS("buffer size is smaller than hdr metadata
>infoframe\n");
>+ return;
>+ }
>+
>+ if (len != infoframe_size) {
>+ DRM_DEBUG_KMS("wrong static hdr metadata size\n");
>+ return;
>+ }
>+
>+ /*
>+ * Set up the infoframe sdp packet for HDR static metadata.
>+ * Prepare VSC Header for SU as per DP 1.4a spec,
>+ * Table 2-100 and Table 2-101
>+ */
>+
>+ /* Packet ID, 00h for non-Audio INFOFRAME */
>+ infoframe_sdp.sdp_header.HB0 = 0;
>+ /*
>+ * Packet Type 80h + Non-audio INFOFRAME Type value
>+ * HDMI_INFOFRAME_TYPE_DRM: 0x87,
>+ */
>+ infoframe_sdp.sdp_header.HB1 = drm_infoframe.type;
>+ /*
>+ * Least Significant Eight Bits of (Data Byte Count – 1)
>+ * infoframe_size - 1,
>+ */
>+ infoframe_sdp.sdp_header.HB2 = 0x1D;
>+ /* INFOFRAME SDP Version Number */
>+ infoframe_sdp.sdp_header.HB3 = (0x13 << 2);
>+ /* CTA Header Byte 2 (INFOFRAME Version Number) */
>+ infoframe_sdp.db[0] = drm_infoframe.version;
>+ /* CTA Header Byte 3 (Length of INFOFRAME): HDMI_DRM_INFOFRAME_SIZE
>*/
>+ infoframe_sdp.db[1] = drm_infoframe.length;
>+ /*
>+ * Copy HDMI_DRM_INFOFRAME_SIZE size from a buffer after
>+ * HDMI_INFOFRAME_HEADER_SIZE
>+ */
>+ memcpy(&infoframe_sdp.db[2], &buf[HDMI_INFOFRAME_HEADER_SIZE],
>+ HDMI_DRM_INFOFRAME_SIZE);
>+
>+ if (INTEL_GEN(dev_priv) >= 11)
>+ intel_dig_port->write_infoframe(&intel_dig_port->base,
>+ crtc_state,
>+
> HDMI_PACKET_TYPE_GAMUT_METADATA,
>+ &infoframe_sdp,
>+ VIDEO_DIP_GMP_DATA_SIZE);
>+ else
>+ /* Prior to GEN11, Header size: 4 bytes, Data size: 28 bytes */
>+ intel_dig_port->write_infoframe(&intel_dig_port->base,
>+ crtc_state,
>+
> HDMI_PACKET_TYPE_GAMUT_METADATA,
>+ &infoframe_sdp,
>+ VIDEO_DIP_DATA_SIZE);
>+}
>+
> void intel_dp_vsc_enable(struct intel_dp *intel_dp,
> const struct intel_crtc_state *crtc_state,
> const struct drm_connector_state *conn_state) @@ -
>4606,6 +4683,18 @@ void intel_dp_vsc_enable(struct intel_dp *intel_dp,
> intel_dp_setup_vsc_sdp(intel_dp, crtc_state, conn_state); }
>
>+void intel_dp_hdr_metadata_enable(struct intel_dp *intel_dp,
>+ const struct intel_crtc_state *crtc_state,
>+ const struct drm_connector_state *conn_state) {
>+ if (!conn_state->hdr_output_metadata)
>+ return;
>+
>+ intel_dp_setup_hdr_metadata_infoframe_sdp(intel_dp,
>+ crtc_state,
>+ conn_state);
>+}
>+
> static u8 intel_dp_autotest_link_training(struct intel_dp *intel_dp) {
> int status = 0;
>diff --git a/drivers/gpu/drm/i915/display/intel_dp.h
>b/drivers/gpu/drm/i915/display/intel_dp.h
>index 87883d0d5977..5613073d1dd5 100644
>--- a/drivers/gpu/drm/i915/display/intel_dp.h
>+++ b/drivers/gpu/drm/i915/display/intel_dp.h
>@@ -116,6 +116,9 @@ bool intel_dp_needs_vsc_sdp(const struct intel_crtc_state
>*crtc_state); void intel_dp_vsc_enable(struct intel_dp *intel_dp,
> const struct intel_crtc_state *crtc_state,
> const struct drm_connector_state *conn_state);
>+void intel_dp_hdr_metadata_enable(struct intel_dp *intel_dp,
>+ const struct intel_crtc_state *crtc_state,
>+ const struct drm_connector_state *conn_state);
> bool intel_digital_port_connected(struct intel_encoder *encoder);
>
> static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
>--
>2.23.0
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