[PATCH v7 00/18] In order to readout DP SDPs, refactors the handling of DP SDPs

[PATCH v7 00/18] In order to readout DP SDPs, refactors the handling of DP SDPs

[Gwan-gyeong Mun]

In order to readout DP SDPs (Secondary Data Packet: DP HDR Metadata
Infoframe SDP, DP VSC SDP), it refactors handling DP SDPs codes.
It adds new compute routines for DP HDR Metadata Infoframe SDP
and DP VSC SDP. 
And new writing routines of DP SDPs (Secondary Data Packet) that uses
computed configs.
New reading routines of DP SDPs are added for readout.
It adds a logging function for DP VSC SDP.
When receiving video it is very useful to be able to log DP VSC SDP.
This greatly simplifies debugging.
In order to use a common VSC SDP Colorimetry calculating code on PSR,
it uses a new psr vsc sdp compute routine.

v2: Minor style fix
v3: 
  - Add a new drm data structure for DP VSC SDP
  - Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
  - Move logging functions to drm core [Jani N]
    And use drm core's DP VSC SDP logging function
  - Explicitly disable unused DIPs (AVI, GCP, VS, SPD, DRM. They will be
    used for HDMI), when intel_dp_set_infoframes() function will be called.
v4:
  - Use struct drm_device logging macros
  - Rebased
v5:
  - Use intel_de_*() functions for register access
  - Add warning where a bpc is 6 and a pixel format is RGB.
  - Addressed review comments from Uma
    Add kernel docs for added data structures
    Rename enum dp_colorspace to dp_pixelformat
    Polish commit message and comments
    Combine the if checks of sdp.HB2 and sdp.HB3
    Add 6bpc to packining and unpacking of VSC SDP
v6: Fix enabled infoframe states of lspcon
v7: Fix the wrong check of combination bpc 6 and RGB pixelformat

Gwan-gyeong Mun (18):
  drm: Add DP1.4 VSC SDP Payload related Data Structures
  drm/i915/dp: Add compute routine for DP VSC SDP
  drm/i915/dp: Add compute routine for DP HDR Metadata Infoframe SDP
  drm/i915/dp: Add writing of DP SDPs
  video/hdmi: Add Unpack only function for DRM infoframe
  drm/i915/dp: Read out DP SDPs
  drm: Add logging function for DP VSC SDP
  drm/i915: Include HDMI DRM infoframe in the crtc state dump
  drm/i915: Include DP HDR Metadata Infoframe SDP in the crtc state dump
  drm/i915: Include DP VSC SDP in the crtc state dump
  drm/i915: Program DP SDPs with computed configs
  drm/i915: Add state readout for DP HDR Metadata Infoframe SDP
  drm/i915: Add state readout for DP VSC SDP
  drm/i915: Fix enabled infoframe states of lspcon
  drm/i915: Program DP SDPs on pipe updates
  drm/i915: Stop sending DP SDPs on ddi disable
  drm/i915/dp: Add compute routine for DP PSR VSC SDP
  drm/i915/psr: Use new DP VSC SDP compute routine on PSR

 drivers/gpu/drm/drm_dp_helper.c               | 174 +++++
 drivers/gpu/drm/i915/display/intel_ddi.c      |  19 +-
 drivers/gpu/drm/i915/display/intel_display.c  |  62 ++
 .../drm/i915/display/intel_display_types.h    |   1 +
 drivers/gpu/drm/i915/display/intel_dp.c       | 638 ++++++++++++++----
 drivers/gpu/drm/i915/display/intel_dp.h       |  18 +-
 drivers/gpu/drm/i915/display/intel_lspcon.c   |   2 +-
 drivers/gpu/drm/i915/display/intel_psr.c      |  54 +-
 drivers/gpu/drm/i915/display/intel_psr.h      |   6 +-
 drivers/gpu/drm/i915/i915_drv.h               |   1 +
 drivers/video/hdmi.c                          |  58 +-
 include/drm/drm_dp_helper.h                   | 133 ++++
 include/linux/hdmi.h                          |   2 +
 13 files changed, 950 insertions(+), 218 deletions(-)

-- 
2.25.0

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[PATCH v7 01/18] drm: Add DP1.4 VSC SDP Payload related Data Structures

[Gwan-gyeong Mun]

It adds new enumeration definitions for VSC SDP Payload for Pixel
Encoding/Colorimetry Format.
And it adds a new drm data structure for DP VSC SDP.

enum dp_colorspace and enum dp_colorimetry correspond "Pixel Encoding and
Colorimetry Formats". enum dp_dynamic_range corresponds "Dynamic Range".
And enum dp_content_type corresponds "Content Type"
All of them are based on DP 1.4 spec [Table 2-117: VSC SDP Payload for
DB16 through DB18].

v3: Add a new drm data structure for DP VSC SDP
v5: Addressed review comments from Uma
    - Add kernel docs for added data structures
    - Rename enum dp_colorspace to dp_pixelformat
    - Polish commit message
    - Fix typos
    - Drop self-explanatory comments

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
---
 include/drm/drm_dp_helper.h | 130 ++++++++++++++++++++++++++++++++++++
 1 file changed, 130 insertions(+)

diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index 262faf9e5e94..e332f54013d7 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1209,6 +1209,136 @@ struct dp_sdp {
 #define EDP_VSC_PSR_UPDATE_RFB		(1<<1)
 #define EDP_VSC_PSR_CRC_VALUES_VALID	(1<<2)
 
+/**
+ * enum dp_pixelformat - drm DP Pixel encoding formats
+ *
+ * This enum is used to indicate DP VSC SDP Pixel encoding formats.
+ * It is based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16 through
+ * DB18]
+ *
+ * @DP_PIXELFORMAT_RGB: RGB pixel encoding format
+ * @DP_PIXELFORMAT_YUV444: YCbCr 4:4:4 pixel encoding format
+ * @DP_PIXELFORMAT_YUV422: YCbCr 4:2:2 pixel encoding format
+ * @DP_PIXELFORMAT_YUV420: YCbCr 4:2:0 pixel encoding format
+ * @DP_PIXELFORMAT_Y_ONLY: Y Only pixel encoding format
+ * @DP_PIXELFORMAT_RAW: RAW pixel encoding format
+ * @DP_PIXELFORMAT_RESERVED: Reserved pixel encoding format
+ */
+enum dp_pixelformat {
+	DP_PIXELFORMAT_RGB = 0,
+	DP_PIXELFORMAT_YUV444 = 0x1,
+	DP_PIXELFORMAT_YUV422 = 0x2,
+	DP_PIXELFORMAT_YUV420 = 0x3,
+	DP_PIXELFORMAT_Y_ONLY = 0x4,
+	DP_PIXELFORMAT_RAW = 0x5,
+	DP_PIXELFORMAT_RESERVED = 0x6,
+};
+
+/**
+ * enum dp_colorimetry - drm DP Colorimetry formats
+ *
+ * This enum is used to indicate DP VSC SDP Colorimetry formats.
+ * It is based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16 through
+ * DB18] and a name of enum member follows DRM_MODE_COLORIMETRY definition.
+ *
+ * @DP_COLORIMETRY_DEFAULT: sRGB (IEC 61966-2-1) or
+ *                          ITU-R BT.601 colorimetry format
+ * @DP_COLORIMETRY_RGB_WIDE_FIXED: RGB wide gamut fixed point colorimetry format
+ * @DP_COLORIMETRY_BT709_YCC: ITU-R BT.709 colorimetry format
+ * @DP_COLORIMETRY_RGB_WIDE_FLOAT: RGB wide gamut floating point
+ *                                 (scRGB (IEC 61966-2-2)) colorimetry format
+ * @DP_COLORIMETRY_XVYCC_601: xvYCC601 colorimetry format
+ * @DP_COLORIMETRY_OPRGB: OpRGB colorimetry format
+ * @DP_COLORIMETRY_XVYCC_709: xvYCC709 colorimetry format
+ * @DP_COLORIMETRY_DCI_P3_RGB: DCI-P3 (SMPTE RP 431-2) colorimetry format
+ * @DP_COLORIMETRY_SYCC_601: sYCC601 colorimetry format
+ * @DP_COLORIMETRY_RGB_CUSTOM: RGB Custom Color Profile colorimetry format
+ * @DP_COLORIMETRY_OPYCC_601: opYCC601 colorimetry format
+ * @DP_COLORIMETRY_BT2020_RGB: ITU-R BT.2020 R' G' B' colorimetry format
+ * @DP_COLORIMETRY_BT2020_CYCC: ITU-R BT.2020 Y'c C'bc C'rc colorimetry format
+ * @DP_COLORIMETRY_BT2020_YCC: ITU-R BT.2020 Y' C'b C'r colorimetry format
+ */
+enum dp_colorimetry {
+	DP_COLORIMETRY_DEFAULT = 0,
+	DP_COLORIMETRY_RGB_WIDE_FIXED = 0x1,
+	DP_COLORIMETRY_BT709_YCC = 0x1,
+	DP_COLORIMETRY_RGB_WIDE_FLOAT = 0x2,
+	DP_COLORIMETRY_XVYCC_601 = 0x2,
+	DP_COLORIMETRY_OPRGB = 0x3,
+	DP_COLORIMETRY_XVYCC_709 = 0x3,
+	DP_COLORIMETRY_DCI_P3_RGB = 0x4,
+	DP_COLORIMETRY_SYCC_601 = 0x4,
+	DP_COLORIMETRY_RGB_CUSTOM = 0x5,
+	DP_COLORIMETRY_OPYCC_601 = 0x5,
+	DP_COLORIMETRY_BT2020_RGB = 0x6,
+	DP_COLORIMETRY_BT2020_CYCC = 0x6,
+	DP_COLORIMETRY_BT2020_YCC = 0x7,
+};
+
+/**
+ * enum dp_dynamic_range - drm DP Dynamic Range
+ *
+ * This enum is used to indicate DP VSC SDP Dynamic Range.
+ * It is based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16 through
+ * DB18]
+ *
+ * @DP_DYNAMIC_RANGE_VESA: VESA range
+ * @DP_DYNAMIC_RANGE_CTA: CTA range
+ */
+enum dp_dynamic_range {
+	DP_DYNAMIC_RANGE_VESA = 0,
+	DP_DYNAMIC_RANGE_CTA = 1,
+};
+
+/**
+ * enum dp_content_type - drm DP Content Type
+ *
+ * This enum is used to indicate DP VSC SDP Content Types.
+ * It is based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16 through
+ * DB18]
+ * CTA-861-G defines content types and expected processing by a sink device
+ *
+ * @DP_CONTENT_TYPE_NOT_DEFINED: Not defined type
+ * @DP_CONTENT_TYPE_GRAPHICS: Graphics type
+ * @DP_CONTENT_TYPE_PHOTO: Photo type
+ * @DP_CONTENT_TYPE_VIDEO: Video type
+ * @DP_CONTENT_TYPE_GAME: Game type
+ */
+enum dp_content_type {
+	DP_CONTENT_TYPE_NOT_DEFINED = 0x00,
+	DP_CONTENT_TYPE_GRAPHICS = 0x01,
+	DP_CONTENT_TYPE_PHOTO = 0x02,
+	DP_CONTENT_TYPE_VIDEO = 0x03,
+	DP_CONTENT_TYPE_GAME = 0x04,
+};
+
+/**
+ * struct drm_dp_vsc_sdp - drm DP VSC SDP
+ *
+ * This structure represents a DP VSC SDP of drm
+ * It is based on DP 1.4 spec [Table 2-116: VSC SDP Header Bytes] and
+ * [Table 2-117: VSC SDP Payload for DB16 through DB18]
+ *
+ * @sdp_type: secondary-data packet type
+ * @revision: revision number
+ * @length: number of valid data bytes
+ * @pixelformat: pixel encoding format
+ * @colorimetry: colorimetry format
+ * @bpc: bit per color
+ * @dynamic_range: dynamic range information
+ * @content_type: CTA-861-G defines content types and expected processing by a sink device
+ */
+struct drm_dp_vsc_sdp {
+	unsigned char sdp_type;
+	unsigned char revision;
+	unsigned char length;
+	enum dp_pixelformat pixelformat;
+	enum dp_colorimetry colorimetry;
+	int bpc;
+	enum dp_dynamic_range dynamic_range;
+	enum dp_content_type content_type;
+};
+
 int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]);
 
 static inline int
-- 
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[PATCH v7 02/18] drm/i915/dp: Add compute routine for DP VSC SDP

[Gwan-gyeong Mun]

In order to support state readout for DP VSC SDP, we need to have a
structure which holds DP VSC SDP payload data such as
"union hdmi_infoframe drm" which is used for DRM infoframe.
It adds a struct drm_dp_vsc_sdp vsc to intel_crtc_state.infoframes.

And it stores computed dp vsc sdp to infoframes.vsc of crtc state.
While computing we'll also fill out the inforames.enable bitmask
appropriately.

The compute routine follows DP 1.4 spec [Table 2-117: VSC SDP Payload for
DB16 through DB18].

v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
v5:
  - Rebased
  - Add warning where a bpc is 6 and a pixel format is RGB.
v7: Fix the wrong check of combination bpc 6 and RGB pixelformat

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 .../drm/i915/display/intel_display_types.h    |   1 +
 drivers/gpu/drm/i915/display/intel_dp.c       | 100 ++++++++++++++++++
 2 files changed, 101 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index 7ae0bc8b80d1..7997c307026d 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -997,6 +997,7 @@ struct intel_crtc_state {
 		union hdmi_infoframe spd;
 		union hdmi_infoframe hdmi;
 		union hdmi_infoframe drm;
+		struct drm_dp_vsc_sdp vsc;
 	} infoframes;
 
 	/* HDMI scrambling status */
diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index f4dede6253f8..bab802a7b3f3 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2372,6 +2372,105 @@ static bool intel_dp_port_has_audio(struct drm_i915_private *dev_priv,
 	return true;
 }
 
+static void intel_dp_compute_vsc_colorimetry(const struct intel_crtc_state *crtc_state,
+					     const struct drm_connector_state *conn_state,
+					     struct drm_dp_vsc_sdp *vsc)
+{
+	struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
+	struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
+
+	/*
+	 * Prepare VSC Header for SU as per DP 1.4 spec, Table 2-118
+	 * VSC SDP supporting 3D stereo, PSR2, and Pixel Encoding/
+	 * Colorimetry Format indication.
+	 */
+	vsc->revision = 0x5;
+	vsc->length = 0x13;
+
+	/* DP 1.4a spec, Table 2-120 */
+	switch (crtc_state->output_format) {
+	case INTEL_OUTPUT_FORMAT_YCBCR444:
+		vsc->pixelformat = DP_PIXELFORMAT_YUV444;
+		break;
+	case INTEL_OUTPUT_FORMAT_YCBCR420:
+		vsc->pixelformat = DP_PIXELFORMAT_YUV420;
+		break;
+	case INTEL_OUTPUT_FORMAT_RGB:
+	default:
+		vsc->pixelformat = DP_PIXELFORMAT_RGB;
+	}
+
+	switch (conn_state->colorspace) {
+	case DRM_MODE_COLORIMETRY_BT709_YCC:
+		vsc->colorimetry = DP_COLORIMETRY_BT709_YCC;
+		break;
+	case DRM_MODE_COLORIMETRY_XVYCC_601:
+		vsc->colorimetry = DP_COLORIMETRY_XVYCC_601;
+		break;
+	case DRM_MODE_COLORIMETRY_XVYCC_709:
+		vsc->colorimetry = DP_COLORIMETRY_XVYCC_709;
+		break;
+	case DRM_MODE_COLORIMETRY_SYCC_601:
+		vsc->colorimetry = DP_COLORIMETRY_SYCC_601;
+		break;
+	case DRM_MODE_COLORIMETRY_OPYCC_601:
+		vsc->colorimetry = DP_COLORIMETRY_OPYCC_601;
+		break;
+	case DRM_MODE_COLORIMETRY_BT2020_CYCC:
+		vsc->colorimetry = DP_COLORIMETRY_BT2020_CYCC;
+		break;
+	case DRM_MODE_COLORIMETRY_BT2020_RGB:
+		vsc->colorimetry = DP_COLORIMETRY_BT2020_RGB;
+		break;
+	case DRM_MODE_COLORIMETRY_BT2020_YCC:
+		vsc->colorimetry = DP_COLORIMETRY_BT2020_YCC;
+		break;
+	case DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65:
+	case DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER:
+		vsc->colorimetry = DP_COLORIMETRY_DCI_P3_RGB;
+		break;
+	default:
+		/*
+		 * RGB->YCBCR color conversion uses the BT.709
+		 * color space.
+		 */
+		if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
+			vsc->colorimetry = DP_COLORIMETRY_BT709_YCC;
+		else
+			vsc->colorimetry = DP_COLORIMETRY_DEFAULT;
+		break;
+	}
+
+	vsc->bpc = crtc_state->pipe_bpp / 3;
+
+	/* only RGB pixelformat supports 6 bpc */
+	drm_WARN_ON(&dev_priv->drm,
+		    vsc->bpc == 6 && vsc->pixelformat != DP_PIXELFORMAT_RGB);
+
+	/* all YCbCr are always limited range */
+	vsc->dynamic_range = DP_DYNAMIC_RANGE_CTA;
+	vsc->content_type = DP_CONTENT_TYPE_NOT_DEFINED;
+}
+
+static void intel_dp_compute_vsc_sdp(struct intel_dp *intel_dp,
+				     struct intel_crtc_state *crtc_state,
+				     const struct drm_connector_state *conn_state)
+{
+	struct drm_dp_vsc_sdp *vsc = &crtc_state->infoframes.vsc;
+
+	/* When PSR is enabled, VSC SDP is handled by PSR routine */
+	if (intel_psr_enabled(intel_dp))
+		return;
+
+	if (!intel_dp_needs_vsc_sdp(crtc_state, conn_state))
+		return;
+
+	crtc_state->infoframes.enable |= intel_hdmi_infoframe_enable(DP_SDP_VSC);
+	vsc->sdp_type = DP_SDP_VSC;
+	intel_dp_compute_vsc_colorimetry(crtc_state, conn_state,
+					 &crtc_state->infoframes.vsc);
+}
+
 int
 intel_dp_compute_config(struct intel_encoder *encoder,
 			struct intel_crtc_state *pipe_config,
@@ -2477,6 +2576,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 		intel_dp_set_clock(encoder, pipe_config);
 
 	intel_psr_compute_config(intel_dp, pipe_config);
+	intel_dp_compute_vsc_sdp(intel_dp, pipe_config, conn_state);
 
 	return 0;
 }
-- 
2.25.0

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[PATCH v7 03/18] drm/i915/dp: Add compute routine for DP HDR Metadata Infoframe SDP

[Gwan-gyeong Mun]

It stores computed dp hdr metadata infoframe sdp to infoframes.drm of
crtc state. It referenced intel_hdmi_compute_drm_infoframe().

While computing, we'll also fill out the infoframes.enable bitmask
appropriately.

v2: Wrap a long line.
v4: Use struct drm_device logging macros
v5: Fix typo [Uma]

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 24 ++++++++++++++++++++++++
 1 file changed, 24 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index bab802a7b3f3..fb008168ca83 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2471,6 +2471,29 @@ static void intel_dp_compute_vsc_sdp(struct intel_dp *intel_dp,
 					 &crtc_state->infoframes.vsc);
 }
 
+static void
+intel_dp_compute_hdr_metadata_infoframe_sdp(struct intel_dp *intel_dp,
+					    struct intel_crtc_state *crtc_state,
+					    const struct drm_connector_state *conn_state)
+{
+	int ret;
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+	struct hdmi_drm_infoframe *drm_infoframe = &crtc_state->infoframes.drm.drm;
+
+	if (!conn_state->hdr_output_metadata)
+		return;
+
+	ret = drm_hdmi_infoframe_set_hdr_metadata(drm_infoframe, conn_state);
+
+	if (ret) {
+		drm_dbg_kms(&dev_priv->drm, "couldn't set HDR metadata in infoframe\n");
+		return;
+	}
+
+	crtc_state->infoframes.enable |=
+		intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GAMUT_METADATA);
+}
+
 int
 intel_dp_compute_config(struct intel_encoder *encoder,
 			struct intel_crtc_state *pipe_config,
@@ -2577,6 +2600,7 @@ intel_dp_compute_config(struct intel_encoder *encoder,
 
 	intel_psr_compute_config(intel_dp, pipe_config);
 	intel_dp_compute_vsc_sdp(intel_dp, pipe_config, conn_state);
+	intel_dp_compute_hdr_metadata_infoframe_sdp(intel_dp, pipe_config, conn_state);
 
 	return 0;
 }
-- 
2.25.0

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[PATCH v7 04/18] drm/i915/dp: Add writing of DP SDPs

[Gwan-gyeong Mun]

It adds routines that write DP VSC SDP and DP HDR Metadata Infoframe SDP.
In order to pack DP VSC SDP, it adds intel_dp_vsc_sdp_pack() function.
It follows DP 1.4a spec. [Table 2-116: VSC SDP Header Bytes] and
[Table 2-117: VSC SDP Payload for DB16 through DB18]

In order to pack DP HDR Metadata Infoframe SDP, it adds
intel_dp_hdr_metadata_infoframe_sdp_pack() function.
And it follows DP 1.4a spec.
([Table 2-125: INFOFRAME SDP v1.2 Header Bytes] and
[Table 2-126: INFOFRAME SDP v1.2 Payload Data Bytes - DB0 through DB31])
and CTA-861-G spec. [Table-42 Dynamic Range and Mastering InfoFrame].

A mechanism and a naming rule of intel_dp_set_infoframes() function
references intel_encoder->set_infoframes() of intel_hdmi.c .
VSC SDP is used for PSR and Pixel Encoding and Colorimetry Formats cases.
Because PSR routine has its own routine of writing a VSC SDP, when the PSR
is enabled, intel_dp_set_infoframes() does not write a VSC SDP.

v3:
  - Explicitly disable unused DIPs (AVI, GCP, VS, SPD, DRM. They will be
    used for HDMI), when intel_dp_set_infoframes() function will be called.
  - Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp.
v4: Use struct drm_device logging macros
v5:
  - use intel_de_*() functions for register access
  - Addressed review comments from Uma
    Polish commit message and comments
    Add 6bpc to packing of VSC SDP

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 199 ++++++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_dp.h |   3 +
 2 files changed, 202 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index fb008168ca83..5bbc55113325 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4741,6 +4741,205 @@ intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state,
 	return false;
 }
 
+static ssize_t intel_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
+				     struct dp_sdp *sdp, size_t size)
+{
+	size_t length = sizeof(struct dp_sdp);
+
+	if (size < length)
+		return -ENOSPC;
+
+	memset(sdp, 0, size);
+
+	/*
+	 * Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119
+	 * VSC SDP Header Bytes
+	 */
+	sdp->sdp_header.HB0 = 0; /* Secondary-Data Packet ID = 0 */
+	sdp->sdp_header.HB1 = vsc->sdp_type; /* Secondary-data Packet Type */
+	sdp->sdp_header.HB2 = vsc->revision; /* Revision Number */
+	sdp->sdp_header.HB3 = vsc->length; /* Number of Valid Data Bytes */
+
+	/* VSC SDP Payload for DB16 through DB18 */
+	/* Pixel Encoding and Colorimetry Formats  */
+	sdp->db[16] = (vsc->pixelformat & 0xf) << 4; /* DB16[7:4] */
+	sdp->db[16] |= vsc->colorimetry & 0xf; /* DB16[3:0] */
+
+	switch (vsc->bpc) {
+	case 6:
+		/* 6bpc: 0x0 */
+		break;
+	case 8:
+		sdp->db[17] = 0x1; /* DB17[3:0] */
+		break;
+	case 10:
+		sdp->db[17] = 0x2;
+		break;
+	case 12:
+		sdp->db[17] = 0x3;
+		break;
+	case 16:
+		sdp->db[17] = 0x4;
+		break;
+	default:
+		MISSING_CASE(vsc->bpc);
+		break;
+	}
+	/* Dynamic Range and Component Bit Depth */
+	if (vsc->dynamic_range == DP_DYNAMIC_RANGE_CTA)
+		sdp->db[17] |= 0x80;  /* DB17[7] */
+
+	/* Content Type */
+	sdp->db[18] = vsc->content_type & 0x7;
+
+	return length;
+}
+
+static ssize_t
+intel_dp_hdr_metadata_infoframe_sdp_pack(const struct hdmi_drm_infoframe *drm_infoframe,
+					 struct dp_sdp *sdp,
+					 size_t size)
+{
+	size_t length = sizeof(struct dp_sdp);
+	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;
+
+	if (size < length)
+		return -ENOSPC;
+
+	memset(sdp, 0, size);
+
+	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 -ENOSPC;
+	}
+
+	if (len != infoframe_size) {
+		DRM_DEBUG_KMS("wrong static hdr metadata size\n");
+		return -ENOSPC;
+	}
+
+	/*
+	 * 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
+	 */
+
+	/* Secondary-Data Packet ID, 00h for non-Audio INFOFRAME */
+	sdp->sdp_header.HB0 = 0;
+	/*
+	 * Packet Type 80h + Non-audio INFOFRAME Type value
+	 * HDMI_INFOFRAME_TYPE_DRM: 0x87
+	 * - 80h + Non-audio INFOFRAME Type value
+	 * - InfoFrame Type: 0x07
+	 *    [CTA-861-G Table-42 Dynamic Range and Mastering InfoFrame]
+	 */
+	sdp->sdp_header.HB1 = drm_infoframe->type;
+	/*
+	 * Least Significant Eight Bits of (Data Byte Count – 1)
+	 * infoframe_size - 1
+	 */
+	sdp->sdp_header.HB2 = 0x1D;
+	/* INFOFRAME SDP Version Number */
+	sdp->sdp_header.HB3 = (0x13 << 2);
+	/* CTA Header Byte 2 (INFOFRAME Version Number) */
+	sdp->db[0] = drm_infoframe->version;
+	/* CTA Header Byte 3 (Length of INFOFRAME): HDMI_DRM_INFOFRAME_SIZE */
+	sdp->db[1] = drm_infoframe->length;
+	/*
+	 * Copy HDMI_DRM_INFOFRAME_SIZE size from a buffer after
+	 * HDMI_INFOFRAME_HEADER_SIZE
+	 */
+	BUILD_BUG_ON(sizeof(sdp->db) < HDMI_DRM_INFOFRAME_SIZE + 2);
+	memcpy(&sdp->db[2], &buf[HDMI_INFOFRAME_HEADER_SIZE],
+	       HDMI_DRM_INFOFRAME_SIZE);
+
+	/*
+	 * Size of DP infoframe sdp packet for HDR static metadata consists of
+	 * - DP SDP Header(struct dp_sdp_header): 4 bytes
+	 * - Two Data Blocks: 2 bytes
+	 *    CTA Header Byte2 (INFOFRAME Version Number)
+	 *    CTA Header Byte3 (Length of INFOFRAME)
+	 * - HDMI_DRM_INFOFRAME_SIZE: 26 bytes
+	 *
+	 * Prior to GEN11's GMP register size is identical to DP HDR static metadata
+	 * infoframe size. But GEN11+ has larger than that size, write_infoframe
+	 * will pad rest of the size.
+	 */
+	return sizeof(struct dp_sdp_header) + 2 + HDMI_DRM_INFOFRAME_SIZE;
+}
+
+static void intel_write_dp_sdp(struct intel_encoder *encoder,
+			       const struct intel_crtc_state *crtc_state,
+			       unsigned int type)
+{
+	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct dp_sdp sdp = {};
+	ssize_t len;
+
+	if ((crtc_state->infoframes.enable &
+	     intel_hdmi_infoframe_enable(type)) == 0)
+		return;
+
+	switch (type) {
+	case DP_SDP_VSC:
+		len = intel_dp_vsc_sdp_pack(&crtc_state->infoframes.vsc, &sdp,
+					    sizeof(sdp));
+		break;
+	case HDMI_PACKET_TYPE_GAMUT_METADATA:
+		len = intel_dp_hdr_metadata_infoframe_sdp_pack(&crtc_state->infoframes.drm.drm,
+							       &sdp, sizeof(sdp));
+		break;
+	default:
+		MISSING_CASE(type);
+		break;
+	}
+
+	if (drm_WARN_ON(&dev_priv->drm, len < 0))
+		return;
+
+	intel_dig_port->write_infoframe(encoder, crtc_state, type, &sdp, len);
+}
+
+void intel_dp_set_infoframes(struct intel_encoder *encoder,
+			     bool enable,
+			     const struct intel_crtc_state *crtc_state,
+			     const struct drm_connector_state *conn_state)
+{
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	i915_reg_t reg = HSW_TVIDEO_DIP_CTL(crtc_state->cpu_transcoder);
+	u32 dip_enable = 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_DRM_GLK;
+	u32 val = intel_de_read(dev_priv, reg);
+
+	/* TODO: Add DSC case (DIP_ENABLE_PPS) */
+	/* When PSR is enabled, this routine doesn't disable VSC DIP */
+	if (intel_psr_enabled(intel_dp))
+		val &= ~dip_enable;
+	else
+		val &= ~(dip_enable | VIDEO_DIP_ENABLE_VSC_HSW);
+
+	if (!enable) {
+		intel_de_write(dev_priv, reg, val);
+		intel_de_posting_read(dev_priv, reg);
+		return;
+	}
+
+	intel_de_write(dev_priv, reg, val);
+	intel_de_posting_read(dev_priv, reg);
+
+	/* When PSR is enabled, VSC SDP is handled by PSR routine */
+	if (!intel_psr_enabled(intel_dp))
+		intel_write_dp_sdp(encoder, crtc_state, DP_SDP_VSC);
+
+	intel_write_dp_sdp(encoder, crtc_state, HDMI_PACKET_TYPE_GAMUT_METADATA);
+}
+
 static void
 intel_dp_setup_vsc_sdp(struct intel_dp *intel_dp,
 		       const struct intel_crtc_state *crtc_state,
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 3da166054788..0dc09a463ee1 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -116,6 +116,9 @@ void intel_dp_vsc_enable(struct intel_dp *intel_dp,
 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);
+void intel_dp_set_infoframes(struct intel_encoder *encoder, bool enable,
+			     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)
-- 
2.25.0

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[PATCH v7 05/18] video/hdmi: Add Unpack only function for DRM infoframe

[Gwan-gyeong Mun]

It adds an unpack only function for DRM infoframe for dynamic range and
mastering infoframe readout.
It unpacks the information data block contained in the binary buffer into
a structured frame of the HDMI Dynamic Range and Mastering (DRM)
information frame.

In contrast to hdmi_drm_infoframe_unpack() function, it does not verify
a checksum.

It can be used for unpacking a DP HDR Metadata Infoframe SDP case.
DP HDR Metadata Infoframe SDP uses the same Dynamic Range and Mastering
(DRM) information (CTA-861-G spec.) such as HDMI DRM infoframe.
But DP SDP header and payload structure are different from HDMI DRM
Infoframe. Therefore unpacking DRM infoframe for DP requires skipping of
a verifying checksum.

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/video/hdmi.c | 58 +++++++++++++++++++++++++++++++-------------
 include/linux/hdmi.h |  2 ++
 2 files changed, 43 insertions(+), 17 deletions(-)

diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
index 9c82e2a0a411..9818836d82b7 100644
--- a/drivers/video/hdmi.c
+++ b/drivers/video/hdmi.c
@@ -1775,20 +1775,18 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
 }
 
 /**
- * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
+ * hdmi_drm_infoframe_unpack_only() - unpack binary buffer to a HDMI DRM infoframe
  * @frame: HDMI DRM infoframe
  * @buffer: source buffer
  * @size: size of buffer
  *
- * Unpacks the information contained in binary @buffer into a structured
+ * Unpacks the information data block contained in binary @buffer into a structured
  * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
- * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
- * specification.
  *
  * Returns 0 on success or a negative error code on failure.
  */
-static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
-				     const void *buffer, size_t size)
+int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
+				   const void *buffer, size_t size)
 {
 	const u8 *ptr = buffer;
 	const u8 *temp;
@@ -1797,23 +1795,13 @@ static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
 	int ret;
 	int i;
 
-	if (size < HDMI_INFOFRAME_SIZE(DRM))
-		return -EINVAL;
-
-	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
-	    ptr[1] != 1 ||
-	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
-		return -EINVAL;
-
-	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
+	if (size < HDMI_DRM_INFOFRAME_SIZE)
 		return -EINVAL;
 
 	ret = hdmi_drm_infoframe_init(frame);
 	if (ret)
 		return ret;
 
-	ptr += HDMI_INFOFRAME_HEADER_SIZE;
-
 	frame->eotf = ptr[0] & 0x7;
 	frame->metadata_type = ptr[1] & 0x7;
 
@@ -1837,6 +1825,42 @@ static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
 
 	return 0;
 }
+EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
+
+/**
+ * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
+ * @frame: HDMI DRM infoframe
+ * @buffer: source buffer
+ * @size: size of buffer
+ *
+ * Unpacks the information contained in binary @buffer into a structured
+ * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
+ * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
+ * specification.
+ *
+ * Returns 0 on success or a negative error code on failure.
+ */
+static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
+				     const void *buffer, size_t size)
+{
+	const u8 *ptr = buffer;
+	int ret;
+
+	if (size < HDMI_INFOFRAME_SIZE(DRM))
+		return -EINVAL;
+
+	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
+	    ptr[1] != 1 ||
+	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
+		return -EINVAL;
+
+	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
+		return -EINVAL;
+
+	ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
+					     size - HDMI_INFOFRAME_HEADER_SIZE);
+	return ret;
+}
 
 /**
  * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
index 9918a6c910c5..afb43efc03e0 100644
--- a/include/linux/hdmi.h
+++ b/include/linux/hdmi.h
@@ -219,6 +219,8 @@ ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame, void *buffer,
 ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
 				     void *buffer, size_t size);
 int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame);
+int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
+				   const void *buffer, size_t size);
 
 enum hdmi_spd_sdi {
 	HDMI_SPD_SDI_UNKNOWN,
-- 
2.25.0

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[PATCH v7 06/18] drm/i915/dp: Read out DP SDPs

[Gwan-gyeong Mun]

It adds code to read the DP SDPs from the video DIP and unpack them into
the crtc state.

It adds routines that read out DP VSC SDP and DP HDR Metadata Infoframe SDP
In order to unpack DP VSC SDP, it adds intel_dp_vsc_sdp_unpack() function.
It follows DP 1.4a spec. [Table 2-116: VSC SDP Header Bytes] and
[Table 2-117: VSC SDP Payload for DB16 through DB18]

In order to unpack DP HDR Metadata Infoframe SDP, it adds
intel_dp_hdr_metadata_infoframe_sdp_unpack(). And it follows DP 1.4a spec.
([Table 2-125: INFOFRAME SDP v1.2 Header Bytes] and
[Table 2-126: INFOFRAME SDP v1.2 Payload Data Bytes - DB0 through DB31])
and CTA-861-G spec. [Table-42 Dynamic Range and Mastering InfoFrame].

A naming rule and style of intel_read_dp_sdp() function references
intel_read_infoframe() function of intel_hdmi.c

v2: Minor style fix
v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
v4: Use struct drm_device logging macros
v5: Addressed review comments from Uma
  - Polish commit message and comments
  - Combine the if checks of sdp.HB2 and sdp.HB3
  - Add 6bpc to unpacking of VSC SDP

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 187 ++++++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_dp.h |   3 +
 2 files changed, 190 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index 5bbc55113325..3df3533a1768 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -4940,6 +4940,193 @@ void intel_dp_set_infoframes(struct intel_encoder *encoder,
 	intel_write_dp_sdp(encoder, crtc_state, HDMI_PACKET_TYPE_GAMUT_METADATA);
 }
 
+static int intel_dp_vsc_sdp_unpack(struct drm_dp_vsc_sdp *vsc,
+				   const void *buffer, size_t size)
+{
+	const struct dp_sdp *sdp = buffer;
+
+	if (size < sizeof(struct dp_sdp))
+		return -EINVAL;
+
+	memset(vsc, 0, size);
+
+	if (sdp->sdp_header.HB0 != 0)
+		return -EINVAL;
+
+	if (sdp->sdp_header.HB1 != DP_SDP_VSC)
+		return -EINVAL;
+
+	vsc->sdp_type = sdp->sdp_header.HB1;
+	vsc->revision = sdp->sdp_header.HB2;
+	vsc->length = sdp->sdp_header.HB3;
+
+	if ((sdp->sdp_header.HB2 == 0x2 && sdp->sdp_header.HB3 == 0x8) ||
+	    (sdp->sdp_header.HB2 == 0x4 && sdp->sdp_header.HB3 == 0xe)) {
+		/*
+		 * - HB2 = 0x2, HB3 = 0x8
+		 *   VSC SDP supporting 3D stereo + PSR
+		 * - HB2 = 0x4, HB3 = 0xe
+		 *   VSC SDP supporting 3D stereo + PSR2 with Y-coordinate of
+		 *   first scan line of the SU region (applies to eDP v1.4b
+		 *   and higher).
+		 */
+		return 0;
+	} else if (sdp->sdp_header.HB2 == 0x5 && sdp->sdp_header.HB3 == 0x13) {
+		/*
+		 * - HB2 = 0x5, HB3 = 0x13
+		 *   VSC SDP supporting 3D stereo + PSR2 + Pixel Encoding/Colorimetry
+		 *   Format.
+		 */
+		vsc->pixelformat = (sdp->db[16] >> 4) & 0xf;
+		vsc->colorimetry = sdp->db[16] & 0xf;
+		vsc->dynamic_range = (sdp->db[17] >> 7) & 0x1;
+
+		switch (sdp->db[17] & 0x7) {
+		case 0x0:
+			vsc->bpc = 6;
+			break;
+		case 0x1:
+			vsc->bpc = 8;
+			break;
+		case 0x2:
+			vsc->bpc = 10;
+			break;
+		case 0x3:
+			vsc->bpc = 12;
+			break;
+		case 0x4:
+			vsc->bpc = 16;
+			break;
+		default:
+			MISSING_CASE(sdp->db[17] & 0x7);
+			return -EINVAL;
+		}
+
+		vsc->content_type = sdp->db[18] & 0x7;
+	} else {
+		return -EINVAL;
+	}
+
+	return 0;
+}
+
+static int
+intel_dp_hdr_metadata_infoframe_sdp_unpack(struct hdmi_drm_infoframe *drm_infoframe,
+					   const void *buffer, size_t size)
+{
+	int ret;
+
+	const struct dp_sdp *sdp = buffer;
+
+	if (size < sizeof(struct dp_sdp))
+		return -EINVAL;
+
+	if (sdp->sdp_header.HB0 != 0)
+		return -EINVAL;
+
+	if (sdp->sdp_header.HB1 != HDMI_INFOFRAME_TYPE_DRM)
+		return -EINVAL;
+
+	/*
+	 * Least Significant Eight Bits of (Data Byte Count – 1)
+	 * 1Dh (i.e., Data Byte Count = 30 bytes).
+	 */
+	if (sdp->sdp_header.HB2 != 0x1D)
+		return -EINVAL;
+
+	/* Most Significant Two Bits of (Data Byte Count – 1), Clear to 00b. */
+	if ((sdp->sdp_header.HB3 & 0x3) != 0)
+		return -EINVAL;
+
+	/* INFOFRAME SDP Version Number */
+	if (((sdp->sdp_header.HB3 >> 2) & 0x3f) != 0x13)
+		return -EINVAL;
+
+	/* CTA Header Byte 2 (INFOFRAME Version Number) */
+	if (sdp->db[0] != 1)
+		return -EINVAL;
+
+	/* CTA Header Byte 3 (Length of INFOFRAME): HDMI_DRM_INFOFRAME_SIZE */
+	if (sdp->db[1] != HDMI_DRM_INFOFRAME_SIZE)
+		return -EINVAL;
+
+	ret = hdmi_drm_infoframe_unpack_only(drm_infoframe, &sdp->db[2],
+					     HDMI_DRM_INFOFRAME_SIZE);
+
+	return ret;
+}
+
+static void intel_read_dp_vsc_sdp(struct intel_encoder *encoder,
+				  struct intel_crtc_state *crtc_state,
+				  struct drm_dp_vsc_sdp *vsc)
+{
+	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
+	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	unsigned int type = DP_SDP_VSC;
+	struct dp_sdp sdp = {};
+	int ret;
+
+	/* When PSR is enabled, VSC SDP is handled by PSR routine */
+	if (intel_psr_enabled(intel_dp))
+		return;
+
+	if ((crtc_state->infoframes.enable &
+	     intel_hdmi_infoframe_enable(type)) == 0)
+		return;
+
+	intel_dig_port->read_infoframe(encoder, crtc_state, type, &sdp, sizeof(sdp));
+
+	ret = intel_dp_vsc_sdp_unpack(vsc, &sdp, sizeof(sdp));
+
+	if (ret)
+		drm_dbg_kms(&dev_priv->drm, "Failed to unpack DP VSC SDP\n");
+}
+
+static void intel_read_dp_hdr_metadata_infoframe_sdp(struct intel_encoder *encoder,
+						     struct intel_crtc_state *crtc_state,
+						     struct hdmi_drm_infoframe *drm_infoframe)
+{
+	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	unsigned int type = HDMI_PACKET_TYPE_GAMUT_METADATA;
+	struct dp_sdp sdp = {};
+	int ret;
+
+	if ((crtc_state->infoframes.enable &
+	    intel_hdmi_infoframe_enable(type)) == 0)
+		return;
+
+	intel_dig_port->read_infoframe(encoder, crtc_state, type, &sdp,
+				       sizeof(sdp));
+
+	ret = intel_dp_hdr_metadata_infoframe_sdp_unpack(drm_infoframe, &sdp,
+							 sizeof(sdp));
+
+	if (ret)
+		drm_dbg_kms(&dev_priv->drm,
+			    "Failed to unpack DP HDR Metadata Infoframe SDP\n");
+}
+
+void intel_read_dp_sdp(struct intel_encoder *encoder,
+		       struct intel_crtc_state *crtc_state,
+		       unsigned int type)
+{
+	switch (type) {
+	case DP_SDP_VSC:
+		intel_read_dp_vsc_sdp(encoder, crtc_state,
+				      &crtc_state->infoframes.vsc);
+		break;
+	case HDMI_PACKET_TYPE_GAMUT_METADATA:
+		intel_read_dp_hdr_metadata_infoframe_sdp(encoder, crtc_state,
+							 &crtc_state->infoframes.drm.drm);
+		break;
+	default:
+		MISSING_CASE(type);
+		break;
+	}
+}
+
 static void
 intel_dp_setup_vsc_sdp(struct intel_dp *intel_dp,
 		       const struct intel_crtc_state *crtc_state,
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 0dc09a463ee1..e8f9ba962d09 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -119,6 +119,9 @@ void intel_dp_hdr_metadata_enable(struct intel_dp *intel_dp,
 void intel_dp_set_infoframes(struct intel_encoder *encoder, bool enable,
 			     const struct intel_crtc_state *crtc_state,
 			     const struct drm_connector_state *conn_state);
+void intel_read_dp_sdp(struct intel_encoder *encoder,
+		       struct intel_crtc_state *crtc_state,
+		       unsigned int type);
 bool intel_digital_port_connected(struct intel_encoder *encoder);
 
 static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
-- 
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[PATCH v7 07/18] drm: Add logging function for DP VSC SDP

[Gwan-gyeong Mun]

When receiving video it is very useful to be able to log DP VSC SDP.
This greatly simplifies debugging.

v2: Minor style fix
v3: Move logging functions to drm core [Jani N]
v5: Rebased

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/drm_dp_helper.c | 174 ++++++++++++++++++++++++++++++++
 include/drm/drm_dp_helper.h     |   3 +
 2 files changed, 177 insertions(+)

diff --git a/drivers/gpu/drm/drm_dp_helper.c b/drivers/gpu/drm/drm_dp_helper.c
index 5a103e9b3c86..17059ed4763b 100644
--- a/drivers/gpu/drm/drm_dp_helper.c
+++ b/drivers/gpu/drm/drm_dp_helper.c
@@ -1395,3 +1395,177 @@ int drm_dp_dsc_sink_supported_input_bpcs(const u8 dsc_dpcd[DP_DSC_RECEIVER_CAP_S
 	return num_bpc;
 }
 EXPORT_SYMBOL(drm_dp_dsc_sink_supported_input_bpcs);
+
+static const char *dp_pixelformat_get_name(enum dp_pixelformat pixelformat)
+{
+	if (pixelformat < 0 || pixelformat > DP_PIXELFORMAT_RESERVED)
+		return "Invalid";
+
+	switch (pixelformat) {
+	case DP_PIXELFORMAT_RGB:
+		return "RGB";
+	case DP_PIXELFORMAT_YUV444:
+		return "YUV444";
+	case DP_PIXELFORMAT_YUV422:
+		return "YUV422";
+	case DP_PIXELFORMAT_YUV420:
+		return "YUV420";
+	case DP_PIXELFORMAT_Y_ONLY:
+		return "Y_ONLY";
+	case DP_PIXELFORMAT_RAW:
+		return "RAW";
+	default:
+		return "Reserved";
+	}
+}
+
+static const char *dp_colorimetry_get_name(enum dp_pixelformat pixelformat,
+					   enum dp_colorimetry colorimetry)
+{
+	if (pixelformat < 0 || pixelformat > DP_PIXELFORMAT_RESERVED)
+		return "Invalid";
+
+	switch (colorimetry) {
+	case DP_COLORIMETRY_DEFAULT:
+		switch (pixelformat) {
+		case DP_PIXELFORMAT_RGB:
+			return "sRGB";
+		case DP_PIXELFORMAT_YUV444:
+		case DP_PIXELFORMAT_YUV422:
+		case DP_PIXELFORMAT_YUV420:
+			return "BT.601";
+		case DP_PIXELFORMAT_Y_ONLY:
+			return "DICOM PS3.14";
+		case DP_PIXELFORMAT_RAW:
+			return "Custom Color Profile";
+		default:
+			return "Reserved";
+		}
+	case DP_COLORIMETRY_RGB_WIDE_FIXED: /* and DP_COLORIMETRY_BT709_YCC */
+		switch (pixelformat) {
+		case DP_PIXELFORMAT_RGB:
+			return "Wide Fixed";
+		case DP_PIXELFORMAT_YUV444:
+		case DP_PIXELFORMAT_YUV422:
+		case DP_PIXELFORMAT_YUV420:
+			return "BT.709";
+		default:
+			return "Reserved";
+		}
+	case DP_COLORIMETRY_RGB_WIDE_FLOAT: /* and DP_COLORIMETRY_XVYCC_601 */
+		switch (pixelformat) {
+		case DP_PIXELFORMAT_RGB:
+			return "Wide Float";
+		case DP_PIXELFORMAT_YUV444:
+		case DP_PIXELFORMAT_YUV422:
+		case DP_PIXELFORMAT_YUV420:
+			return "xvYCC 601";
+		default:
+			return "Reserved";
+		}
+	case DP_COLORIMETRY_OPRGB: /* and DP_COLORIMETRY_XVYCC_709 */
+		switch (pixelformat) {
+		case DP_PIXELFORMAT_RGB:
+			return "OpRGB";
+		case DP_PIXELFORMAT_YUV444:
+		case DP_PIXELFORMAT_YUV422:
+		case DP_PIXELFORMAT_YUV420:
+			return "xvYCC 709";
+		default:
+			return "Reserved";
+		}
+	case DP_COLORIMETRY_DCI_P3_RGB: /* and DP_COLORIMETRY_SYCC_601 */
+		switch (pixelformat) {
+		case DP_PIXELFORMAT_RGB:
+			return "DCI-P3";
+		case DP_PIXELFORMAT_YUV444:
+		case DP_PIXELFORMAT_YUV422:
+		case DP_PIXELFORMAT_YUV420:
+			return "sYCC 601";
+		default:
+			return "Reserved";
+		}
+	case DP_COLORIMETRY_RGB_CUSTOM: /* and DP_COLORIMETRY_OPYCC_601 */
+		switch (pixelformat) {
+		case DP_PIXELFORMAT_RGB:
+			return "Custom Profile";
+		case DP_PIXELFORMAT_YUV444:
+		case DP_PIXELFORMAT_YUV422:
+		case DP_PIXELFORMAT_YUV420:
+			return "OpYCC 601";
+		default:
+			return "Reserved";
+		}
+	case DP_COLORIMETRY_BT2020_RGB: /* and DP_COLORIMETRY_BT2020_CYCC */
+		switch (pixelformat) {
+		case DP_PIXELFORMAT_RGB:
+			return "BT.2020 RGB";
+		case DP_PIXELFORMAT_YUV444:
+		case DP_PIXELFORMAT_YUV422:
+		case DP_PIXELFORMAT_YUV420:
+			return "BT.2020 CYCC";
+		default:
+			return "Reserved";
+		}
+	case DP_COLORIMETRY_BT2020_YCC:
+		switch (pixelformat) {
+		case DP_PIXELFORMAT_YUV444:
+		case DP_PIXELFORMAT_YUV422:
+		case DP_PIXELFORMAT_YUV420:
+			return "BT.2020 YCC";
+		default:
+			return "Reserved";
+		}
+	default:
+		return "Invalid";
+	}
+}
+
+static const char *dp_dynamic_range_get_name(enum dp_dynamic_range dynamic_range)
+{
+	switch (dynamic_range) {
+	case DP_DYNAMIC_RANGE_VESA:
+		return "VESA range";
+	case DP_DYNAMIC_RANGE_CTA:
+		return "CTA range";
+	default:
+		return "Invalid";
+	}
+}
+
+static const char *dp_content_type_get_name(enum dp_content_type content_type)
+{
+	switch (content_type) {
+	case DP_CONTENT_TYPE_NOT_DEFINED:
+		return "Not defined";
+	case DP_CONTENT_TYPE_GRAPHICS:
+		return "Graphics";
+	case DP_CONTENT_TYPE_PHOTO:
+		return "Photo";
+	case DP_CONTENT_TYPE_VIDEO:
+		return "Video";
+	case DP_CONTENT_TYPE_GAME:
+		return "Game";
+	default:
+		return "Reserved";
+	}
+}
+
+void drm_dp_vsc_sdp_log(const char *level, struct device *dev,
+			const struct drm_dp_vsc_sdp *vsc)
+{
+#define DP_SDP_LOG(fmt, ...) dev_printk(level, dev, fmt, ##__VA_ARGS__)
+	DP_SDP_LOG("DP SDP: %s, revision %u, length %u\n", "VSC",
+		   vsc->revision, vsc->length);
+	DP_SDP_LOG("    pixelformat: %s\n",
+		   dp_pixelformat_get_name(vsc->pixelformat));
+	DP_SDP_LOG("    colorimetry: %s\n",
+		   dp_colorimetry_get_name(vsc->pixelformat, vsc->colorimetry));
+	DP_SDP_LOG("    bpc: %u\n", vsc->bpc);
+	DP_SDP_LOG("    dynamic range: %s\n",
+		   dp_dynamic_range_get_name(vsc->dynamic_range));
+	DP_SDP_LOG("    content type: %s\n",
+		   dp_content_type_get_name(vsc->content_type));
+#undef DP_SDP_LOG
+}
+EXPORT_SYMBOL(drm_dp_vsc_sdp_log);
diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h
index e332f54013d7..331bb0c2512e 100644
--- a/include/drm/drm_dp_helper.h
+++ b/include/drm/drm_dp_helper.h
@@ -1339,6 +1339,9 @@ struct drm_dp_vsc_sdp {
 	enum dp_content_type content_type;
 };
 
+void drm_dp_vsc_sdp_log(const char *level, struct device *dev,
+			const struct drm_dp_vsc_sdp *vsc);
+
 int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]);
 
 static inline int
-- 
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[PATCH v7 08/18] drm/i915: Include HDMI DRM infoframe in the crtc state dump

[Gwan-gyeong Mun]

Dump out the HDMI Dynamic Range and Mastering (DRM) infoframe in the
normal crtc state dump.

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 368e481d45ee..66dbaab5867e 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13158,6 +13158,9 @@ static void intel_dump_pipe_config(const struct intel_crtc_state *pipe_config,
 	if (pipe_config->infoframes.enable &
 	    intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_VENDOR))
 		intel_dump_infoframe(dev_priv, &pipe_config->infoframes.hdmi);
+	if (pipe_config->infoframes.enable &
+	    intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_DRM))
+		intel_dump_infoframe(dev_priv, &pipe_config->infoframes.drm);
 
 	drm_dbg_kms(&dev_priv->drm, "requested mode:\n");
 	drm_mode_debug_printmodeline(&pipe_config->hw.mode);
-- 
2.25.0

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[PATCH v7 09/18] drm/i915: Include DP HDR Metadata Infoframe SDP in the crtc state dump

[Gwan-gyeong Mun]

Dump out the DP HDR Metadata Infoframe SDP in the normal crtc state dump.

HDMI Dynamic Range and Mastering (DRM) infoframe and DP HDR Metadata
Infoframe SDP use the same member variable in infoframes of crtc state.

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 3 +++
 1 file changed, 3 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 66dbaab5867e..440e2c1c855c 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13161,6 +13161,9 @@ static void intel_dump_pipe_config(const struct intel_crtc_state *pipe_config,
 	if (pipe_config->infoframes.enable &
 	    intel_hdmi_infoframe_enable(HDMI_INFOFRAME_TYPE_DRM))
 		intel_dump_infoframe(dev_priv, &pipe_config->infoframes.drm);
+	if (pipe_config->infoframes.enable &
+	    intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GAMUT_METADATA))
+		intel_dump_infoframe(dev_priv, &pipe_config->infoframes.drm);
 
 	drm_dbg_kms(&dev_priv->drm, "requested mode:\n");
 	drm_mode_debug_printmodeline(&pipe_config->hw.mode);
-- 
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[PATCH v7 10/18] drm/i915: Include DP VSC SDP in the crtc state dump

[Gwan-gyeong Mun]

Dump out the DP VSC SDP in the normal crtc state dump

v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
    Use drm core's DP VSC SDP logging function

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_display.c | 13 +++++++++++++
 1 file changed, 13 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index 440e2c1c855c..e3694e499b28 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13006,6 +13006,16 @@ intel_dump_infoframe(struct drm_i915_private *dev_priv,
 	hdmi_infoframe_log(KERN_DEBUG, dev_priv->drm.dev, frame);
 }
 
+static void
+intel_dump_dp_vsc_sdp(struct drm_i915_private *dev_priv,
+		      const struct drm_dp_vsc_sdp *vsc)
+{
+	if (!drm_debug_enabled(DRM_UT_KMS))
+		return;
+
+	drm_dp_vsc_sdp_log(KERN_DEBUG, dev_priv->drm.dev, vsc);
+}
+
 #define OUTPUT_TYPE(x) [INTEL_OUTPUT_ ## x] = #x
 
 static const char * const output_type_str[] = {
@@ -13164,6 +13174,9 @@ static void intel_dump_pipe_config(const struct intel_crtc_state *pipe_config,
 	if (pipe_config->infoframes.enable &
 	    intel_hdmi_infoframe_enable(HDMI_PACKET_TYPE_GAMUT_METADATA))
 		intel_dump_infoframe(dev_priv, &pipe_config->infoframes.drm);
+	if (pipe_config->infoframes.enable &
+	    intel_hdmi_infoframe_enable(DP_SDP_VSC))
+		intel_dump_dp_vsc_sdp(dev_priv, &pipe_config->infoframes.vsc);
 
 	drm_dbg_kms(&dev_priv->drm, "requested mode:\n");
 	drm_mode_debug_printmodeline(&pipe_config->hw.mode);
-- 
2.25.0

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[PATCH v7 11/18] drm/i915: Program DP SDPs with computed configs

[Gwan-gyeong Mun]

In order to use computed config for DP SDPs (DP VSC SDP and DP HDR Metadata
Infoframe SDP), it replaces intel_dp_vsc_enable() function and
intel_dp_hdr_metadata_enable() function to intel_dp_set_infoframes()
function.
And it removes unused functions.

Before:
 intel_dp_vsc_enable() and intel_dp_hdr_metadata_enable() compute sdp
 configs and program sdp registers on enable callback of encoder.

After:
 It separates computing of sdp configs and programming of sdp register.
 The compute config callback of encoder calls computing sdp configs.
 The enable callback of encoder calls programming sdp register.

v3: Rebased
v5: Polish commit message [Uma]

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c |   3 +-
 drivers/gpu/drm/i915/display/intel_dp.c  | 226 -----------------------
 drivers/gpu/drm/i915/display/intel_dp.h  |   6 -
 3 files changed, 1 insertion(+), 234 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 1ab638e17046..857014fe5880 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3902,8 +3902,7 @@ 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_dp_set_infoframes(encoder, true, 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 3df3533a1768..a824408b6e2a 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -5127,232 +5127,6 @@ void intel_read_dp_sdp(struct intel_encoder *encoder,
 	}
 }
 
-static void
-intel_dp_setup_vsc_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 dp_sdp vsc_sdp = {};
-
-	/* Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119 */
-	vsc_sdp.sdp_header.HB0 = 0;
-	vsc_sdp.sdp_header.HB1 = 0x7;
-
-	/*
-	 * VSC SDP supporting 3D stereo, PSR2, and Pixel Encoding/
-	 * Colorimetry Format indication.
-	 */
-	vsc_sdp.sdp_header.HB2 = 0x5;
-
-	/*
-	 * VSC SDP supporting 3D stereo, + PSR2, + Pixel Encoding/
-	 * Colorimetry Format indication (HB2 = 05h).
-	 */
-	vsc_sdp.sdp_header.HB3 = 0x13;
-
-	/* DP 1.4a spec, Table 2-120 */
-	switch (crtc_state->output_format) {
-	case INTEL_OUTPUT_FORMAT_YCBCR444:
-		vsc_sdp.db[16] = 0x1 << 4; /* YCbCr 444 : DB16[7:4] = 1h */
-		break;
-	case INTEL_OUTPUT_FORMAT_YCBCR420:
-		vsc_sdp.db[16] = 0x3 << 4; /* YCbCr 420 : DB16[7:4] = 3h */
-		break;
-	case INTEL_OUTPUT_FORMAT_RGB:
-	default:
-		/* RGB: DB16[7:4] = 0h */
-		break;
-	}
-
-	switch (conn_state->colorspace) {
-	case DRM_MODE_COLORIMETRY_BT709_YCC:
-		vsc_sdp.db[16] |= 0x1;
-		break;
-	case DRM_MODE_COLORIMETRY_XVYCC_601:
-		vsc_sdp.db[16] |= 0x2;
-		break;
-	case DRM_MODE_COLORIMETRY_XVYCC_709:
-		vsc_sdp.db[16] |= 0x3;
-		break;
-	case DRM_MODE_COLORIMETRY_SYCC_601:
-		vsc_sdp.db[16] |= 0x4;
-		break;
-	case DRM_MODE_COLORIMETRY_OPYCC_601:
-		vsc_sdp.db[16] |= 0x5;
-		break;
-	case DRM_MODE_COLORIMETRY_BT2020_CYCC:
-	case DRM_MODE_COLORIMETRY_BT2020_RGB:
-		vsc_sdp.db[16] |= 0x6;
-		break;
-	case DRM_MODE_COLORIMETRY_BT2020_YCC:
-		vsc_sdp.db[16] |= 0x7;
-		break;
-	case DRM_MODE_COLORIMETRY_DCI_P3_RGB_D65:
-	case DRM_MODE_COLORIMETRY_DCI_P3_RGB_THEATER:
-		vsc_sdp.db[16] |= 0x4; /* DCI-P3 (SMPTE RP 431-2) */
-		break;
-	default:
-		/* sRGB (IEC 61966-2-1) / ITU-R BT.601: DB16[0:3] = 0h */
-
-		/* RGB->YCBCR color conversion uses the BT.709 color space. */
-		if (crtc_state->output_format == INTEL_OUTPUT_FORMAT_YCBCR420)
-			vsc_sdp.db[16] |= 0x1; /* 0x1, ITU-R BT.709 */
-		break;
-	}
-
-	/*
-	 * For pixel encoding formats YCbCr444, YCbCr422, YCbCr420, and Y Only,
-	 * the following Component Bit Depth values are defined:
-	 * 001b = 8bpc.
-	 * 010b = 10bpc.
-	 * 011b = 12bpc.
-	 * 100b = 16bpc.
-	 */
-	switch (crtc_state->pipe_bpp) {
-	case 24: /* 8bpc */
-		vsc_sdp.db[17] = 0x1;
-		break;
-	case 30: /* 10bpc */
-		vsc_sdp.db[17] = 0x2;
-		break;
-	case 36: /* 12bpc */
-		vsc_sdp.db[17] = 0x3;
-		break;
-	case 48: /* 16bpc */
-		vsc_sdp.db[17] = 0x4;
-		break;
-	default:
-		MISSING_CASE(crtc_state->pipe_bpp);
-		break;
-	}
-
-	/*
-	 * Dynamic Range (Bit 7)
-	 * 0 = VESA range, 1 = CTA range.
-	 * all YCbCr are always limited range
-	 */
-	vsc_sdp.db[17] |= 0x80;
-
-	/*
-	 * Content Type (Bits 2:0)
-	 * 000b = Not defined.
-	 * 001b = Graphics.
-	 * 010b = Photo.
-	 * 011b = Video.
-	 * 100b = Game
-	 * All other values are RESERVED.
-	 * Note: See CTA-861-G for the definition and expected
-	 * processing by a stream sink for the above contect types.
-	 */
-	vsc_sdp.db[18] = 0;
-
-	intel_dig_port->write_infoframe(&intel_dig_port->base,
-			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 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
-	 */
-	BUILD_BUG_ON(sizeof(infoframe_sdp.db) < HDMI_DRM_INFOFRAME_SIZE + 2);
-	memcpy(&infoframe_sdp.db[2], &buf[HDMI_INFOFRAME_HEADER_SIZE],
-	       HDMI_DRM_INFOFRAME_SIZE);
-
-	/*
-	 * Size of DP infoframe sdp packet for HDR static metadata is consist of
-	 * - DP SDP Header(struct dp_sdp_header): 4 bytes
-	 * - Two Data Blocks: 2 bytes
-	 *    CTA Header Byte2 (INFOFRAME Version Number)
-	 *    CTA Header Byte3 (Length of INFOFRAME)
-	 * - HDMI_DRM_INFOFRAME_SIZE: 26 bytes
-	 *
-	 * Prior to GEN11's GMP register size is identical to DP HDR static metadata
-	 * infoframe size. But GEN11+ has larger than that size, write_infoframe
-	 * will pad rest of the size.
-	 */
-	intel_dig_port->write_infoframe(&intel_dig_port->base, crtc_state,
-					HDMI_PACKET_TYPE_GAMUT_METADATA,
-					&infoframe_sdp,
-					sizeof(struct dp_sdp_header) + 2 + HDMI_DRM_INFOFRAME_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)
-{
-	if (!intel_dp_needs_vsc_sdp(crtc_state, conn_state))
-		return;
-
-	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 e8f9ba962d09..6562bb8edeba 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -110,12 +110,6 @@ int intel_dp_link_required(int pixel_clock, int bpp);
 int intel_dp_max_data_rate(int max_link_clock, int max_lanes);
 bool intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state,
 			    const struct drm_connector_state *conn_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);
 void intel_dp_set_infoframes(struct intel_encoder *encoder, bool enable,
 			     const struct intel_crtc_state *crtc_state,
 			     const struct drm_connector_state *conn_state);
-- 
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[PATCH v7 12/18] drm/i915: Add state readout for DP HDR Metadata Infoframe SDP

[Gwan-gyeong Mun]

Added state readout for DP HDR Metadata Infoframe SDP.

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c | 8 ++++++++
 1 file changed, 8 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 857014fe5880..55eacc4d75bb 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4298,6 +4298,9 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 				      pipe_config->fec_enable);
 		}
 
+		pipe_config->infoframes.enable |=
+			intel_hdmi_infoframes_enabled(encoder, pipe_config);
+
 		break;
 	case TRANS_DDI_MODE_SELECT_DP_MST:
 		pipe_config->output_types |= BIT(INTEL_OUTPUT_DP_MST);
@@ -4309,6 +4312,9 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 					REG_FIELD_GET(TRANS_DDI_MST_TRANSPORT_SELECT_MASK, temp);
 
 		intel_dp_get_m_n(intel_crtc, pipe_config);
+
+		pipe_config->infoframes.enable |=
+			intel_hdmi_infoframes_enabled(encoder, pipe_config);
 		break;
 	default:
 		break;
@@ -4359,6 +4365,8 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 	intel_read_infoframe(encoder, pipe_config,
 			     HDMI_INFOFRAME_TYPE_DRM,
 			     &pipe_config->infoframes.drm);
+
+	intel_read_dp_sdp(encoder, pipe_config, HDMI_PACKET_TYPE_GAMUT_METADATA);
 }
 
 static enum intel_output_type
-- 
2.25.0

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[PATCH v7 13/18] drm/i915: Add state readout for DP VSC SDP

[Gwan-gyeong Mun]

Added state readout for DP VSC SDP and enabled state validation
for DP VSC SDP.

v2: Minor style fix
v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
v4: Use struct drm_device logging macros

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c     |  1 +
 drivers/gpu/drm/i915/display/intel_display.c | 43 ++++++++++++++++++++
 2 files changed, 44 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 55eacc4d75bb..7f29b08ea202 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4367,6 +4367,7 @@ void intel_ddi_get_config(struct intel_encoder *encoder,
 			     &pipe_config->infoframes.drm);
 
 	intel_read_dp_sdp(encoder, pipe_config, HDMI_PACKET_TYPE_GAMUT_METADATA);
+	intel_read_dp_sdp(encoder, pipe_config, DP_SDP_VSC);
 }
 
 static enum intel_output_type
diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c
index e3694e499b28..c11898cc1b50 100644
--- a/drivers/gpu/drm/i915/display/intel_display.c
+++ b/drivers/gpu/drm/i915/display/intel_display.c
@@ -13634,6 +13634,13 @@ intel_compare_infoframe(const union hdmi_infoframe *a,
 	return memcmp(a, b, sizeof(*a)) == 0;
 }
 
+static bool
+intel_compare_dp_vsc_sdp(const struct drm_dp_vsc_sdp *a,
+			 const struct drm_dp_vsc_sdp *b)
+{
+	return memcmp(a, b, sizeof(*a)) == 0;
+}
+
 static void
 pipe_config_infoframe_mismatch(struct drm_i915_private *dev_priv,
 			       bool fastset, const char *name,
@@ -13659,6 +13666,31 @@ pipe_config_infoframe_mismatch(struct drm_i915_private *dev_priv,
 	}
 }
 
+static void
+pipe_config_dp_vsc_sdp_mismatch(struct drm_i915_private *dev_priv,
+				bool fastset, const char *name,
+				const struct drm_dp_vsc_sdp *a,
+				const struct drm_dp_vsc_sdp *b)
+{
+	if (fastset) {
+		if (!drm_debug_enabled(DRM_UT_KMS))
+			return;
+
+		drm_dbg_kms(&dev_priv->drm,
+			    "fastset mismatch in %s dp sdp\n", name);
+		drm_dbg_kms(&dev_priv->drm, "expected:\n");
+		drm_dp_vsc_sdp_log(KERN_DEBUG, dev_priv->drm.dev, a);
+		drm_dbg_kms(&dev_priv->drm, "found:\n");
+		drm_dp_vsc_sdp_log(KERN_DEBUG, dev_priv->drm.dev, b);
+	} else {
+		drm_err(&dev_priv->drm, "mismatch in %s dp sdp\n", name);
+		drm_err(&dev_priv->drm, "expected:\n");
+		drm_dp_vsc_sdp_log(KERN_ERR, dev_priv->drm.dev, a);
+		drm_err(&dev_priv->drm, "found:\n");
+		drm_dp_vsc_sdp_log(KERN_ERR, dev_priv->drm.dev, b);
+	}
+}
+
 static void __printf(4, 5)
 pipe_config_mismatch(bool fastset, const struct intel_crtc *crtc,
 		     const char *name, const char *format, ...)
@@ -13860,6 +13892,16 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 	} \
 } while (0)
 
+#define PIPE_CONF_CHECK_DP_VSC_SDP(name) do { \
+	if (!intel_compare_dp_vsc_sdp(&current_config->infoframes.name, \
+				      &pipe_config->infoframes.name)) { \
+		pipe_config_dp_vsc_sdp_mismatch(dev_priv, fastset, __stringify(name), \
+						&current_config->infoframes.name, \
+						&pipe_config->infoframes.name); \
+		ret = false; \
+	} \
+} while (0)
+
 #define PIPE_CONF_CHECK_COLOR_LUT(name1, name2, bit_precision) do { \
 	if (current_config->name1 != pipe_config->name1) { \
 		pipe_config_mismatch(fastset, crtc, __stringify(name1), \
@@ -14035,6 +14077,7 @@ intel_pipe_config_compare(const struct intel_crtc_state *current_config,
 	PIPE_CONF_CHECK_INFOFRAME(spd);
 	PIPE_CONF_CHECK_INFOFRAME(hdmi);
 	PIPE_CONF_CHECK_INFOFRAME(drm);
+	PIPE_CONF_CHECK_DP_VSC_SDP(vsc);
 
 	PIPE_CONF_CHECK_X(sync_mode_slaves_mask);
 	PIPE_CONF_CHECK_I(master_transcoder);
-- 
2.25.0

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[PATCH v7 14/18] drm/i915: Fix enabled infoframe states of lspcon

[Gwan-gyeong Mun]

Compared to implementation of DP and HDMI's encoder->infoframes_enabled,
the lspcon's implementation returns its active state. (we expect enabled
infoframe states of HW.) It leads to pipe state mismatch error
when ddi_get_config is called.

Because the current implementation of lspcon is not ready to support
readout infoframes, we need to return 0 here.

In order to support readout to lspcon, we need to implement read_infoframe
and infoframes_enabled. And set_infoframes also have to set an appropriate
bit on crtc_state->infoframes.enable

Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
---
 drivers/gpu/drm/i915/display/intel_lspcon.c | 2 +-
 1 file changed, 1 insertion(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c b/drivers/gpu/drm/i915/display/intel_lspcon.c
index d807c5648c87..6ff7b226f0a1 100644
--- a/drivers/gpu/drm/i915/display/intel_lspcon.c
+++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
@@ -522,7 +522,7 @@ u32 lspcon_infoframes_enabled(struct intel_encoder *encoder,
 			      const struct intel_crtc_state *pipe_config)
 {
 	/* FIXME actually read this from the hw */
-	return enc_to_intel_lspcon(encoder)->active;
+	return 0;
 }
 
 void lspcon_resume(struct intel_lspcon *lspcon)
-- 
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[PATCH v7 15/18] drm/i915: Program DP SDPs on pipe updates

[Gwan-gyeong Mun]

Call intel_dp_set_infoframes() function on pipe updates to make sure
that we send VSC SDP and HDR Metadata Infoframe SDP (when applicable)
on fastsets.

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c | 1 +
 1 file changed, 1 insertion(+)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 7f29b08ea202..99d3f011ed96 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -4070,6 +4070,7 @@ static void intel_ddi_update_pipe_dp(struct intel_encoder *encoder,
 	intel_ddi_set_dp_msa(crtc_state, conn_state);
 
 	intel_psr_update(intel_dp, crtc_state);
+	intel_dp_set_infoframes(encoder, true, crtc_state, conn_state);
 	intel_edp_drrs_enable(intel_dp, crtc_state);
 
 	intel_panel_update_backlight(encoder, crtc_state, conn_state);
-- 
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[PATCH v7 16/18] drm/i915: Stop sending DP SDPs on ddi disable

[Gwan-gyeong Mun]

Call intel_dp_set_infoframes(false) function on intel_ddi_post_disable_dp()
to make sure not to send VSC SDP and HDR Metadata Infoframe SDP.

v5: Polish commit message [Uma]

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c | 2 ++
 1 file changed, 2 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index 99d3f011ed96..e21dfc0d926b 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3715,6 +3715,8 @@ static void intel_ddi_post_disable_dp(struct intel_encoder *encoder,
 					  INTEL_OUTPUT_DP_MST);
 	enum phy phy = intel_port_to_phy(dev_priv, encoder->port);
 
+	intel_dp_set_infoframes(encoder, false, old_crtc_state, old_conn_state);
+
 	/*
 	 * Power down sink before disabling the port, otherwise we end
 	 * up getting interrupts from the sink on detecting link loss.
-- 
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[PATCH v7 17/18] drm/i915/dp: Add compute routine for DP PSR VSC SDP

[Gwan-gyeong Mun]

In order to use a common VSC SDP Colorimetry calculating code on PSR,
it adds a compute routine for PSR VSC SDP.
As PSR routine can not use infoframes.vsc of crtc state, it also adds new
writing of DP SDPs (Secondary Data Packet) for PSR.
PSR routine has its own scenario and timings of writing a VSC SDP.

v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
v4: Use struct drm_device logging macros

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_dp.c | 54 +++++++++++++++++++++++++
 drivers/gpu/drm/i915/display/intel_dp.h |  8 ++++
 2 files changed, 62 insertions(+)

diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c
index a824408b6e2a..7a82ce425aba 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.c
+++ b/drivers/gpu/drm/i915/display/intel_dp.c
@@ -2471,6 +2471,42 @@ static void intel_dp_compute_vsc_sdp(struct intel_dp *intel_dp,
 					 &crtc_state->infoframes.vsc);
 }
 
+void intel_dp_compute_psr_vsc_sdp(struct intel_dp *intel_dp,
+				  const struct intel_crtc_state *crtc_state,
+				  const struct drm_connector_state *conn_state,
+				  struct drm_dp_vsc_sdp *vsc)
+{
+	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
+
+	vsc->sdp_type = DP_SDP_VSC;
+
+	if (dev_priv->psr.psr2_enabled) {
+		if (dev_priv->psr.colorimetry_support &&
+		    intel_dp_needs_vsc_sdp(crtc_state, conn_state)) {
+			/* [PSR2, +Colorimetry] */
+			intel_dp_compute_vsc_colorimetry(crtc_state, conn_state,
+							 vsc);
+		} else {
+			/*
+			 * [PSR2, -Colorimetry]
+			 * Prepare VSC Header for SU as per eDP 1.4 spec, Table 6-11
+			 * 3D stereo + PSR/PSR2 + Y-coordinate.
+			 */
+			vsc->revision = 0x4;
+			vsc->length = 0xe;
+		}
+	} else {
+		/*
+		 * [PSR1]
+		 * Prepare VSC Header for SU as per DP 1.4 spec, Table 2-118
+		 * VSC SDP supporting 3D stereo + PSR (applies to eDP v1.3 or
+		 * higher).
+		 */
+		vsc->revision = 0x2;
+		vsc->length = 0x8;
+	}
+}
+
 static void
 intel_dp_compute_hdr_metadata_infoframe_sdp(struct intel_dp *intel_dp,
 					    struct intel_crtc_state *crtc_state,
@@ -4904,6 +4940,24 @@ static void intel_write_dp_sdp(struct intel_encoder *encoder,
 	intel_dig_port->write_infoframe(encoder, crtc_state, type, &sdp, len);
 }
 
+void intel_write_dp_vsc_sdp(struct intel_encoder *encoder,
+			    const struct intel_crtc_state *crtc_state,
+			    struct drm_dp_vsc_sdp *vsc)
+{
+	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
+	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
+	struct dp_sdp sdp = {};
+	ssize_t len;
+
+	len = intel_dp_vsc_sdp_pack(vsc, &sdp, sizeof(sdp));
+
+	if (drm_WARN_ON(&dev_priv->drm, len < 0))
+		return;
+
+	intel_dig_port->write_infoframe(encoder, crtc_state, DP_SDP_VSC,
+					&sdp, len);
+}
+
 void intel_dp_set_infoframes(struct intel_encoder *encoder,
 			     bool enable,
 			     const struct intel_crtc_state *crtc_state,
diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h
index 6562bb8edeba..5074e52722c0 100644
--- a/drivers/gpu/drm/i915/display/intel_dp.h
+++ b/drivers/gpu/drm/i915/display/intel_dp.h
@@ -18,6 +18,7 @@ struct drm_connector_state;
 struct drm_encoder;
 struct drm_i915_private;
 struct drm_modeset_acquire_ctx;
+struct drm_dp_vsc_sdp;
 struct intel_connector;
 struct intel_crtc_state;
 struct intel_digital_port;
@@ -110,6 +111,13 @@ int intel_dp_link_required(int pixel_clock, int bpp);
 int intel_dp_max_data_rate(int max_link_clock, int max_lanes);
 bool intel_dp_needs_vsc_sdp(const struct intel_crtc_state *crtc_state,
 			    const struct drm_connector_state *conn_state);
+void intel_dp_compute_psr_vsc_sdp(struct intel_dp *intel_dp,
+				  const struct intel_crtc_state *crtc_state,
+				  const struct drm_connector_state *conn_state,
+				  struct drm_dp_vsc_sdp *vsc);
+void intel_write_dp_vsc_sdp(struct intel_encoder *encoder,
+			    const struct intel_crtc_state *crtc_state,
+			    struct drm_dp_vsc_sdp *vsc);
 void intel_dp_set_infoframes(struct intel_encoder *encoder, bool enable,
 			     const struct intel_crtc_state *crtc_state,
 			     const struct drm_connector_state *conn_state);
-- 
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[PATCH v7 18/18] drm/i915/psr: Use new DP VSC SDP compute routine on PSR

[Gwan-gyeong Mun]

In order to use a common VSC SDP Colorimetry calculating code on PSR,
it uses a new psr vsc sdp compute routine.
Because PSR routine has its own scenario and timings of writing a VSC SDP,
the current PSR routine needs to have its own drm_dp_vsc_sdp structure
member variable on struct i915_psr.

In order to calculate colorimetry information, intel_psr_update()
function and intel_psr_enable() function extend a drm_connector_state
argument.

There are no changes to PSR mechanism.

v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
v4: Rebased

Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
Reviewed-by: Uma Shankar <uma.shankar@intel.com>
---
 drivers/gpu/drm/i915/display/intel_ddi.c |  4 +-
 drivers/gpu/drm/i915/display/intel_psr.c | 54 +++++++-----------------
 drivers/gpu/drm/i915/display/intel_psr.h |  6 ++-
 drivers/gpu/drm/i915/i915_drv.h          |  1 +
 4 files changed, 22 insertions(+), 43 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c
index e21dfc0d926b..fd0e88566074 100644
--- a/drivers/gpu/drm/i915/display/intel_ddi.c
+++ b/drivers/gpu/drm/i915/display/intel_ddi.c
@@ -3903,7 +3903,7 @@ static void intel_enable_ddi_dp(struct intel_encoder *encoder,
 		intel_dp_stop_link_train(intel_dp);
 
 	intel_edp_backlight_on(crtc_state, conn_state);
-	intel_psr_enable(intel_dp, crtc_state);
+	intel_psr_enable(intel_dp, crtc_state, conn_state);
 	intel_dp_set_infoframes(encoder, true, crtc_state, conn_state);
 	intel_edp_drrs_enable(intel_dp, crtc_state);
 
@@ -4071,7 +4071,7 @@ static void intel_ddi_update_pipe_dp(struct intel_encoder *encoder,
 
 	intel_ddi_set_dp_msa(crtc_state, conn_state);
 
-	intel_psr_update(intel_dp, crtc_state);
+	intel_psr_update(intel_dp, crtc_state, conn_state);
 	intel_dp_set_infoframes(encoder, true, crtc_state, conn_state);
 	intel_edp_drrs_enable(intel_dp, crtc_state);
 
diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c
index db3d1561e9bf..953c0286307d 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.c
+++ b/drivers/gpu/drm/i915/display/intel_psr.c
@@ -335,39 +335,6 @@ void intel_psr_init_dpcd(struct intel_dp *intel_dp)
 	}
 }
 
-static void intel_psr_setup_vsc(struct intel_dp *intel_dp,
-				const struct intel_crtc_state *crtc_state)
-{
-	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
-	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
-	struct dp_sdp psr_vsc;
-
-	if (dev_priv->psr.psr2_enabled) {
-		/* Prepare VSC Header for SU as per EDP 1.4 spec, Table 6.11 */
-		memset(&psr_vsc, 0, sizeof(psr_vsc));
-		psr_vsc.sdp_header.HB0 = 0;
-		psr_vsc.sdp_header.HB1 = 0x7;
-		if (dev_priv->psr.colorimetry_support) {
-			psr_vsc.sdp_header.HB2 = 0x5;
-			psr_vsc.sdp_header.HB3 = 0x13;
-		} else {
-			psr_vsc.sdp_header.HB2 = 0x4;
-			psr_vsc.sdp_header.HB3 = 0xe;
-		}
-	} else {
-		/* Prepare VSC packet as per EDP 1.3 spec, Table 3.10 */
-		memset(&psr_vsc, 0, sizeof(psr_vsc));
-		psr_vsc.sdp_header.HB0 = 0;
-		psr_vsc.sdp_header.HB1 = 0x7;
-		psr_vsc.sdp_header.HB2 = 0x2;
-		psr_vsc.sdp_header.HB3 = 0x8;
-	}
-
-	intel_dig_port->write_infoframe(&intel_dig_port->base,
-					crtc_state,
-					DP_SDP_VSC, &psr_vsc, sizeof(psr_vsc));
-}
-
 static void hsw_psr_setup_aux(struct intel_dp *intel_dp)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
@@ -859,9 +826,12 @@ static void intel_psr_enable_source(struct intel_dp *intel_dp,
 }
 
 static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
-				    const struct intel_crtc_state *crtc_state)
+				    const struct intel_crtc_state *crtc_state,
+				    const struct drm_connector_state *conn_state)
 {
 	struct intel_dp *intel_dp = dev_priv->psr.dp;
+	struct intel_digital_port *intel_dig_port = dp_to_dig_port(intel_dp);
+	struct intel_encoder *encoder = &intel_dig_port->base;
 	u32 val;
 
 	drm_WARN_ON(&dev_priv->drm, dev_priv->psr.enabled);
@@ -900,7 +870,9 @@ static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
 
 	drm_dbg_kms(&dev_priv->drm, "Enabling PSR%s\n",
 		    dev_priv->psr.psr2_enabled ? "2" : "1");
-	intel_psr_setup_vsc(intel_dp, crtc_state);
+	intel_dp_compute_psr_vsc_sdp(intel_dp, crtc_state, conn_state,
+				     &dev_priv->psr.vsc);
+	intel_write_dp_vsc_sdp(encoder, crtc_state, &dev_priv->psr.vsc);
 	intel_psr_enable_sink(intel_dp);
 	intel_psr_enable_source(intel_dp, crtc_state);
 	dev_priv->psr.enabled = true;
@@ -912,11 +884,13 @@ static void intel_psr_enable_locked(struct drm_i915_private *dev_priv,
  * intel_psr_enable - Enable PSR
  * @intel_dp: Intel DP
  * @crtc_state: new CRTC state
+ * @conn_state: new CONNECTOR state
  *
  * This function can only be called after the pipe is fully trained and enabled.
  */
 void intel_psr_enable(struct intel_dp *intel_dp,
-		      const struct intel_crtc_state *crtc_state)
+		      const struct intel_crtc_state *crtc_state,
+		      const struct drm_connector_state *conn_state)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
 
@@ -935,7 +909,7 @@ void intel_psr_enable(struct intel_dp *intel_dp,
 		goto unlock;
 	}
 
-	intel_psr_enable_locked(dev_priv, crtc_state);
+	intel_psr_enable_locked(dev_priv, crtc_state, conn_state);
 
 unlock:
 	mutex_unlock(&dev_priv->psr.lock);
@@ -1068,13 +1042,15 @@ static void psr_force_hw_tracking_exit(struct drm_i915_private *dev_priv)
  * intel_psr_update - Update PSR state
  * @intel_dp: Intel DP
  * @crtc_state: new CRTC state
+ * @conn_state: new CONNECTOR state
  *
  * This functions will update PSR states, disabling, enabling or switching PSR
  * version when executing fastsets. For full modeset, intel_psr_disable() and
  * intel_psr_enable() should be called instead.
  */
 void intel_psr_update(struct intel_dp *intel_dp,
-		      const struct intel_crtc_state *crtc_state)
+		      const struct intel_crtc_state *crtc_state,
+		      const struct drm_connector_state *conn_state)
 {
 	struct drm_i915_private *dev_priv = dp_to_i915(intel_dp);
 	struct i915_psr *psr = &dev_priv->psr;
@@ -1109,7 +1085,7 @@ void intel_psr_update(struct intel_dp *intel_dp,
 		intel_psr_disable_locked(intel_dp);
 
 	if (enable)
-		intel_psr_enable_locked(dev_priv, crtc_state);
+		intel_psr_enable_locked(dev_priv, crtc_state, conn_state);
 
 unlock:
 	mutex_unlock(&dev_priv->psr.lock);
diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h
index c58a1d438808..a003fb18105a 100644
--- a/drivers/gpu/drm/i915/display/intel_psr.h
+++ b/drivers/gpu/drm/i915/display/intel_psr.h
@@ -17,11 +17,13 @@ struct intel_dp;
 #define CAN_PSR(dev_priv) (HAS_PSR(dev_priv) && dev_priv->psr.sink_support)
 void intel_psr_init_dpcd(struct intel_dp *intel_dp);
 void intel_psr_enable(struct intel_dp *intel_dp,
-		      const struct intel_crtc_state *crtc_state);
+		      const struct intel_crtc_state *crtc_state,
+		      const struct drm_connector_state *conn_state);
 void intel_psr_disable(struct intel_dp *intel_dp,
 		       const struct intel_crtc_state *old_crtc_state);
 void intel_psr_update(struct intel_dp *intel_dp,
-		      const struct intel_crtc_state *crtc_state);
+		      const struct intel_crtc_state *crtc_state,
+		      const struct drm_connector_state *conn_state);
 int intel_psr_debug_set(struct drm_i915_private *dev_priv, u64 value);
 void intel_psr_invalidate(struct drm_i915_private *dev_priv,
 			  unsigned frontbuffer_bits,
diff --git a/drivers/gpu/drm/i915/i915_drv.h b/drivers/gpu/drm/i915/i915_drv.h
index a71ff233cc55..3a723715327d 100644
--- a/drivers/gpu/drm/i915/i915_drv.h
+++ b/drivers/gpu/drm/i915/i915_drv.h
@@ -506,6 +506,7 @@ struct i915_psr {
 	u32 dc3co_exit_delay;
 	struct delayed_work idle_work;
 	bool initially_probed;
+	struct drm_dp_vsc_sdp vsc;
 };
 
 #define QUIRK_LVDS_SSC_DISABLE (1<<1)
-- 
2.25.0

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RE: [PATCH v7 01/18] drm: Add DP1.4 VSC SDP Payload related Data Structures

[Shankar, Uma]

> -----Original Message-----
> From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf Of Gwan-
> gyeong Mun
> Sent: Tuesday, February 11, 2020 1:17 PM
> To: intel-gfx@lists.freedesktop.org
> Cc: linux-fbdev@vger.kernel.org; dri-devel@lists.freedesktop.org
> Subject: [PATCH v7 01/18] drm: Add DP1.4 VSC SDP Payload related Data Structures
> 
> It adds new enumeration definitions for VSC SDP Payload for Pixel
> Encoding/Colorimetry Format.
> And it adds a new drm data structure for DP VSC SDP.
> 
> enum dp_colorspace and enum dp_colorimetry correspond "Pixel Encoding and
> Colorimetry Formats". enum dp_dynamic_range corresponds "Dynamic Range".
> And enum dp_content_type corresponds "Content Type"
> All of them are based on DP 1.4 spec [Table 2-117: VSC SDP Payload for
> DB16 through DB18].
> 
> v3: Add a new drm data structure for DP VSC SDP
> v5: Addressed review comments from Uma
>     - Add kernel docs for added data structures
>     - Rename enum dp_colorspace to dp_pixelformat
>     - Polish commit message
>     - Fix typos
>     - Drop self-explanatory comments

Changes look good.
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> ---
>  include/drm/drm_dp_helper.h | 130 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 130 insertions(+)
> 
> diff --git a/include/drm/drm_dp_helper.h b/include/drm/drm_dp_helper.h index
> 262faf9e5e94..e332f54013d7 100644
> --- a/include/drm/drm_dp_helper.h
> +++ b/include/drm/drm_dp_helper.h
> @@ -1209,6 +1209,136 @@ struct dp_sdp {
>  #define EDP_VSC_PSR_UPDATE_RFB		(1<<1)
>  #define EDP_VSC_PSR_CRC_VALUES_VALID	(1<<2)
> 
> +/**
> + * enum dp_pixelformat - drm DP Pixel encoding formats
> + *
> + * This enum is used to indicate DP VSC SDP Pixel encoding formats.
> + * It is based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16
> +through
> + * DB18]
> + *
> + * @DP_PIXELFORMAT_RGB: RGB pixel encoding format
> + * @DP_PIXELFORMAT_YUV444: YCbCr 4:4:4 pixel encoding format
> + * @DP_PIXELFORMAT_YUV422: YCbCr 4:2:2 pixel encoding format
> + * @DP_PIXELFORMAT_YUV420: YCbCr 4:2:0 pixel encoding format
> + * @DP_PIXELFORMAT_Y_ONLY: Y Only pixel encoding format
> + * @DP_PIXELFORMAT_RAW: RAW pixel encoding format
> + * @DP_PIXELFORMAT_RESERVED: Reserved pixel encoding format  */ enum
> +dp_pixelformat {
> +	DP_PIXELFORMAT_RGB = 0,
> +	DP_PIXELFORMAT_YUV444 = 0x1,
> +	DP_PIXELFORMAT_YUV422 = 0x2,
> +	DP_PIXELFORMAT_YUV420 = 0x3,
> +	DP_PIXELFORMAT_Y_ONLY = 0x4,
> +	DP_PIXELFORMAT_RAW = 0x5,
> +	DP_PIXELFORMAT_RESERVED = 0x6,
> +};
> +
> +/**
> + * enum dp_colorimetry - drm DP Colorimetry formats
> + *
> + * This enum is used to indicate DP VSC SDP Colorimetry formats.
> + * It is based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16
> +through
> + * DB18] and a name of enum member follows DRM_MODE_COLORIMETRY
> definition.
> + *
> + * @DP_COLORIMETRY_DEFAULT: sRGB (IEC 61966-2-1) or
> + *                          ITU-R BT.601 colorimetry format
> + * @DP_COLORIMETRY_RGB_WIDE_FIXED: RGB wide gamut fixed point
> +colorimetry format
> + * @DP_COLORIMETRY_BT709_YCC: ITU-R BT.709 colorimetry format
> + * @DP_COLORIMETRY_RGB_WIDE_FLOAT: RGB wide gamut floating point
> + *                                 (scRGB (IEC 61966-2-2)) colorimetry format
> + * @DP_COLORIMETRY_XVYCC_601: xvYCC601 colorimetry format
> + * @DP_COLORIMETRY_OPRGB: OpRGB colorimetry format
> + * @DP_COLORIMETRY_XVYCC_709: xvYCC709 colorimetry format
> + * @DP_COLORIMETRY_DCI_P3_RGB: DCI-P3 (SMPTE RP 431-2) colorimetry
> +format
> + * @DP_COLORIMETRY_SYCC_601: sYCC601 colorimetry format
> + * @DP_COLORIMETRY_RGB_CUSTOM: RGB Custom Color Profile colorimetry
> +format
> + * @DP_COLORIMETRY_OPYCC_601: opYCC601 colorimetry format
> + * @DP_COLORIMETRY_BT2020_RGB: ITU-R BT.2020 R' G' B' colorimetry
> +format
> + * @DP_COLORIMETRY_BT2020_CYCC: ITU-R BT.2020 Y'c C'bc C'rc colorimetry
> +format
> + * @DP_COLORIMETRY_BT2020_YCC: ITU-R BT.2020 Y' C'b C'r colorimetry
> +format  */ enum dp_colorimetry {
> +	DP_COLORIMETRY_DEFAULT = 0,
> +	DP_COLORIMETRY_RGB_WIDE_FIXED = 0x1,
> +	DP_COLORIMETRY_BT709_YCC = 0x1,
> +	DP_COLORIMETRY_RGB_WIDE_FLOAT = 0x2,
> +	DP_COLORIMETRY_XVYCC_601 = 0x2,
> +	DP_COLORIMETRY_OPRGB = 0x3,
> +	DP_COLORIMETRY_XVYCC_709 = 0x3,
> +	DP_COLORIMETRY_DCI_P3_RGB = 0x4,
> +	DP_COLORIMETRY_SYCC_601 = 0x4,
> +	DP_COLORIMETRY_RGB_CUSTOM = 0x5,
> +	DP_COLORIMETRY_OPYCC_601 = 0x5,
> +	DP_COLORIMETRY_BT2020_RGB = 0x6,
> +	DP_COLORIMETRY_BT2020_CYCC = 0x6,
> +	DP_COLORIMETRY_BT2020_YCC = 0x7,
> +};
> +
> +/**
> + * enum dp_dynamic_range - drm DP Dynamic Range
> + *
> + * This enum is used to indicate DP VSC SDP Dynamic Range.
> + * It is based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16
> +through
> + * DB18]
> + *
> + * @DP_DYNAMIC_RANGE_VESA: VESA range
> + * @DP_DYNAMIC_RANGE_CTA: CTA range
> + */
> +enum dp_dynamic_range {
> +	DP_DYNAMIC_RANGE_VESA = 0,
> +	DP_DYNAMIC_RANGE_CTA = 1,
> +};
> +
> +/**
> + * enum dp_content_type - drm DP Content Type
> + *
> + * This enum is used to indicate DP VSC SDP Content Types.
> + * It is based on DP 1.4 spec [Table 2-117: VSC SDP Payload for DB16
> +through
> + * DB18]
> + * CTA-861-G defines content types and expected processing by a sink
> +device
> + *
> + * @DP_CONTENT_TYPE_NOT_DEFINED: Not defined type
> + * @DP_CONTENT_TYPE_GRAPHICS: Graphics type
> + * @DP_CONTENT_TYPE_PHOTO: Photo type
> + * @DP_CONTENT_TYPE_VIDEO: Video type
> + * @DP_CONTENT_TYPE_GAME: Game type
> + */
> +enum dp_content_type {
> +	DP_CONTENT_TYPE_NOT_DEFINED = 0x00,
> +	DP_CONTENT_TYPE_GRAPHICS = 0x01,
> +	DP_CONTENT_TYPE_PHOTO = 0x02,
> +	DP_CONTENT_TYPE_VIDEO = 0x03,
> +	DP_CONTENT_TYPE_GAME = 0x04,
> +};
> +
> +/**
> + * struct drm_dp_vsc_sdp - drm DP VSC SDP
> + *
> + * This structure represents a DP VSC SDP of drm
> + * It is based on DP 1.4 spec [Table 2-116: VSC SDP Header Bytes] and
> + * [Table 2-117: VSC SDP Payload for DB16 through DB18]
> + *
> + * @sdp_type: secondary-data packet type
> + * @revision: revision number
> + * @length: number of valid data bytes
> + * @pixelformat: pixel encoding format
> + * @colorimetry: colorimetry format
> + * @bpc: bit per color
> + * @dynamic_range: dynamic range information
> + * @content_type: CTA-861-G defines content types and expected
> +processing by a sink device  */ struct drm_dp_vsc_sdp {
> +	unsigned char sdp_type;
> +	unsigned char revision;
> +	unsigned char length;
> +	enum dp_pixelformat pixelformat;
> +	enum dp_colorimetry colorimetry;
> +	int bpc;
> +	enum dp_dynamic_range dynamic_range;
> +	enum dp_content_type content_type;
> +};
> +
>  int drm_dp_psr_setup_time(const u8 psr_cap[EDP_PSR_RECEIVER_CAP_SIZE]);
> 
>  static inline int
> --
> 2.25.0
> 
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> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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RE: [PATCH v7 04/18] drm/i915/dp: Add writing of DP SDPs

[Shankar, Uma]

> -----Original Message-----
> From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf Of Gwan-
> gyeong Mun
> Sent: Tuesday, February 11, 2020 1:17 PM
> To: intel-gfx@lists.freedesktop.org
> Cc: linux-fbdev@vger.kernel.org; dri-devel@lists.freedesktop.org
> Subject: [PATCH v7 04/18] drm/i915/dp: Add writing of DP SDPs
> 
> It adds routines that write DP VSC SDP and DP HDR Metadata Infoframe SDP.
> In order to pack DP VSC SDP, it adds intel_dp_vsc_sdp_pack() function.
> It follows DP 1.4a spec. [Table 2-116: VSC SDP Header Bytes] and [Table 2-117: VSC
> SDP Payload for DB16 through DB18]
> 
> In order to pack DP HDR Metadata Infoframe SDP, it adds
> intel_dp_hdr_metadata_infoframe_sdp_pack() function.
> And it follows DP 1.4a spec.
> ([Table 2-125: INFOFRAME SDP v1.2 Header Bytes] and [Table 2-126: INFOFRAME
> SDP v1.2 Payload Data Bytes - DB0 through DB31]) and CTA-861-G spec. [Table-42
> Dynamic Range and Mastering InfoFrame].
> 
> A mechanism and a naming rule of intel_dp_set_infoframes() function references
> intel_encoder->set_infoframes() of intel_hdmi.c .
> VSC SDP is used for PSR and Pixel Encoding and Colorimetry Formats cases.
> Because PSR routine has its own routine of writing a VSC SDP, when the PSR is
> enabled, intel_dp_set_infoframes() does not write a VSC SDP.
> 
> v3:
>   - Explicitly disable unused DIPs (AVI, GCP, VS, SPD, DRM. They will be
>     used for HDMI), when intel_dp_set_infoframes() function will be called.
>   - Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp.
> v4: Use struct drm_device logging macros
> v5:
>   - use intel_de_*() functions for register access
>   - Addressed review comments from Uma
>     Polish commit message and comments
>     Add 6bpc to packing of VSC SDP

Looks good to me.
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 199 ++++++++++++++++++++++++
>  drivers/gpu/drm/i915/display/intel_dp.h |   3 +
>  2 files changed, 202 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index fb008168ca83..5bbc55113325 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -4741,6 +4741,205 @@ intel_dp_needs_vsc_sdp(const struct intel_crtc_state
> *crtc_state,
>  	return false;
>  }
> 
> +static ssize_t intel_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
> +				     struct dp_sdp *sdp, size_t size) {
> +	size_t length = sizeof(struct dp_sdp);
> +
> +	if (size < length)
> +		return -ENOSPC;
> +
> +	memset(sdp, 0, size);
> +
> +	/*
> +	 * Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119
> +	 * VSC SDP Header Bytes
> +	 */
> +	sdp->sdp_header.HB0 = 0; /* Secondary-Data Packet ID = 0 */
> +	sdp->sdp_header.HB1 = vsc->sdp_type; /* Secondary-data Packet Type */
> +	sdp->sdp_header.HB2 = vsc->revision; /* Revision Number */
> +	sdp->sdp_header.HB3 = vsc->length; /* Number of Valid Data Bytes */
> +
> +	/* VSC SDP Payload for DB16 through DB18 */
> +	/* Pixel Encoding and Colorimetry Formats  */
> +	sdp->db[16] = (vsc->pixelformat & 0xf) << 4; /* DB16[7:4] */
> +	sdp->db[16] |= vsc->colorimetry & 0xf; /* DB16[3:0] */
> +
> +	switch (vsc->bpc) {
> +	case 6:
> +		/* 6bpc: 0x0 */
> +		break;
> +	case 8:
> +		sdp->db[17] = 0x1; /* DB17[3:0] */
> +		break;
> +	case 10:
> +		sdp->db[17] = 0x2;
> +		break;
> +	case 12:
> +		sdp->db[17] = 0x3;
> +		break;
> +	case 16:
> +		sdp->db[17] = 0x4;
> +		break;
> +	default:
> +		MISSING_CASE(vsc->bpc);
> +		break;
> +	}
> +	/* Dynamic Range and Component Bit Depth */
> +	if (vsc->dynamic_range == DP_DYNAMIC_RANGE_CTA)
> +		sdp->db[17] |= 0x80;  /* DB17[7] */
> +
> +	/* Content Type */
> +	sdp->db[18] = vsc->content_type & 0x7;
> +
> +	return length;
> +}
> +
> +static ssize_t
> +intel_dp_hdr_metadata_infoframe_sdp_pack(const struct hdmi_drm_infoframe
> *drm_infoframe,
> +					 struct dp_sdp *sdp,
> +					 size_t size)
> +{
> +	size_t length = sizeof(struct dp_sdp);
> +	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;
> +
> +	if (size < length)
> +		return -ENOSPC;
> +
> +	memset(sdp, 0, size);
> +
> +	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 -ENOSPC;
> +	}
> +
> +	if (len != infoframe_size) {
> +		DRM_DEBUG_KMS("wrong static hdr metadata size\n");
> +		return -ENOSPC;
> +	}
> +
> +	/*
> +	 * 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
> +	 */
> +
> +	/* Secondary-Data Packet ID, 00h for non-Audio INFOFRAME */
> +	sdp->sdp_header.HB0 = 0;
> +	/*
> +	 * Packet Type 80h + Non-audio INFOFRAME Type value
> +	 * HDMI_INFOFRAME_TYPE_DRM: 0x87
> +	 * - 80h + Non-audio INFOFRAME Type value
> +	 * - InfoFrame Type: 0x07
> +	 *    [CTA-861-G Table-42 Dynamic Range and Mastering InfoFrame]
> +	 */
> +	sdp->sdp_header.HB1 = drm_infoframe->type;
> +	/*
> +	 * Least Significant Eight Bits of (Data Byte Count – 1)
> +	 * infoframe_size - 1
> +	 */
> +	sdp->sdp_header.HB2 = 0x1D;
> +	/* INFOFRAME SDP Version Number */
> +	sdp->sdp_header.HB3 = (0x13 << 2);
> +	/* CTA Header Byte 2 (INFOFRAME Version Number) */
> +	sdp->db[0] = drm_infoframe->version;
> +	/* CTA Header Byte 3 (Length of INFOFRAME):
> HDMI_DRM_INFOFRAME_SIZE */
> +	sdp->db[1] = drm_infoframe->length;
> +	/*
> +	 * Copy HDMI_DRM_INFOFRAME_SIZE size from a buffer after
> +	 * HDMI_INFOFRAME_HEADER_SIZE
> +	 */
> +	BUILD_BUG_ON(sizeof(sdp->db) < HDMI_DRM_INFOFRAME_SIZE + 2);
> +	memcpy(&sdp->db[2], &buf[HDMI_INFOFRAME_HEADER_SIZE],
> +	       HDMI_DRM_INFOFRAME_SIZE);
> +
> +	/*
> +	 * Size of DP infoframe sdp packet for HDR static metadata consists of
> +	 * - DP SDP Header(struct dp_sdp_header): 4 bytes
> +	 * - Two Data Blocks: 2 bytes
> +	 *    CTA Header Byte2 (INFOFRAME Version Number)
> +	 *    CTA Header Byte3 (Length of INFOFRAME)
> +	 * - HDMI_DRM_INFOFRAME_SIZE: 26 bytes
> +	 *
> +	 * Prior to GEN11's GMP register size is identical to DP HDR static metadata
> +	 * infoframe size. But GEN11+ has larger than that size, write_infoframe
> +	 * will pad rest of the size.
> +	 */
> +	return sizeof(struct dp_sdp_header) + 2 + HDMI_DRM_INFOFRAME_SIZE; }
> +
> +static void intel_write_dp_sdp(struct intel_encoder *encoder,
> +			       const struct intel_crtc_state *crtc_state,
> +			       unsigned int type)
> +{
> +	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
> +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> +	struct dp_sdp sdp = {};
> +	ssize_t len;
> +
> +	if ((crtc_state->infoframes.enable &
> +	     intel_hdmi_infoframe_enable(type)) == 0)
> +		return;
> +
> +	switch (type) {
> +	case DP_SDP_VSC:
> +		len = intel_dp_vsc_sdp_pack(&crtc_state->infoframes.vsc, &sdp,
> +					    sizeof(sdp));
> +		break;
> +	case HDMI_PACKET_TYPE_GAMUT_METADATA:
> +		len = intel_dp_hdr_metadata_infoframe_sdp_pack(&crtc_state-
> >infoframes.drm.drm,
> +							       &sdp, sizeof(sdp));
> +		break;
> +	default:
> +		MISSING_CASE(type);
> +		break;
> +	}
> +
> +	if (drm_WARN_ON(&dev_priv->drm, len < 0))
> +		return;
> +
> +	intel_dig_port->write_infoframe(encoder, crtc_state, type, &sdp, len);
> +}
> +
> +void intel_dp_set_infoframes(struct intel_encoder *encoder,
> +			     bool enable,
> +			     const struct intel_crtc_state *crtc_state,
> +			     const struct drm_connector_state *conn_state) {
> +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> +	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> +	i915_reg_t reg = HSW_TVIDEO_DIP_CTL(crtc_state->cpu_transcoder);
> +	u32 dip_enable = 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_DRM_GLK;
> +	u32 val = intel_de_read(dev_priv, reg);
> +
> +	/* TODO: Add DSC case (DIP_ENABLE_PPS) */
> +	/* When PSR is enabled, this routine doesn't disable VSC DIP */
> +	if (intel_psr_enabled(intel_dp))
> +		val &= ~dip_enable;
> +	else
> +		val &= ~(dip_enable | VIDEO_DIP_ENABLE_VSC_HSW);
> +
> +	if (!enable) {
> +		intel_de_write(dev_priv, reg, val);
> +		intel_de_posting_read(dev_priv, reg);
> +		return;
> +	}
> +
> +	intel_de_write(dev_priv, reg, val);
> +	intel_de_posting_read(dev_priv, reg);
> +
> +	/* When PSR is enabled, VSC SDP is handled by PSR routine */
> +	if (!intel_psr_enabled(intel_dp))
> +		intel_write_dp_sdp(encoder, crtc_state, DP_SDP_VSC);
> +
> +	intel_write_dp_sdp(encoder, crtc_state,
> +HDMI_PACKET_TYPE_GAMUT_METADATA); }
> +
>  static void
>  intel_dp_setup_vsc_sdp(struct intel_dp *intel_dp,
>  		       const struct intel_crtc_state *crtc_state, diff --git
> a/drivers/gpu/drm/i915/display/intel_dp.h
> b/drivers/gpu/drm/i915/display/intel_dp.h
> index 3da166054788..0dc09a463ee1 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.h
> +++ b/drivers/gpu/drm/i915/display/intel_dp.h
> @@ -116,6 +116,9 @@ void intel_dp_vsc_enable(struct intel_dp *intel_dp,  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);
> +void intel_dp_set_infoframes(struct intel_encoder *encoder, bool enable,
> +			     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)
> --
> 2.25.0
> 
> _______________________________________________
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> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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RE: [Intel-gfx] [PATCH v7 06/18] drm/i915/dp: Read out DP SDPs

[Shankar, Uma]

> -----Original Message-----
> From: Intel-gfx <intel-gfx-bounces@lists.freedesktop.org> On Behalf Of Gwan-
> gyeong Mun
> Sent: Tuesday, February 11, 2020 1:17 PM
> To: intel-gfx@lists.freedesktop.org
> Cc: linux-fbdev@vger.kernel.org; dri-devel@lists.freedesktop.org
> Subject: [Intel-gfx] [PATCH v7 06/18] drm/i915/dp: Read out DP SDPs
> 
> It adds code to read the DP SDPs from the video DIP and unpack them into the crtc
> state.
> 
> It adds routines that read out DP VSC SDP and DP HDR Metadata Infoframe SDP In
> order to unpack DP VSC SDP, it adds intel_dp_vsc_sdp_unpack() function.
> It follows DP 1.4a spec. [Table 2-116: VSC SDP Header Bytes] and [Table 2-117: VSC
> SDP Payload for DB16 through DB18]
> 
> In order to unpack DP HDR Metadata Infoframe SDP, it adds
> intel_dp_hdr_metadata_infoframe_sdp_unpack(). And it follows DP 1.4a spec.
> ([Table 2-125: INFOFRAME SDP v1.2 Header Bytes] and [Table 2-126: INFOFRAME
> SDP v1.2 Payload Data Bytes - DB0 through DB31]) and CTA-861-G spec. [Table-42
> Dynamic Range and Mastering InfoFrame].
> 
> A naming rule and style of intel_read_dp_sdp() function references
> intel_read_infoframe() function of intel_hdmi.c
> 
> v2: Minor style fix
> v3: Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp
> v4: Use struct drm_device logging macros
> v5: Addressed review comments from Uma
>   - Polish commit message and comments
>   - Combine the if checks of sdp.HB2 and sdp.HB3
>   - Add 6bpc to unpacking of VSC SDP

Looks good to me.
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_dp.c | 187 ++++++++++++++++++++++++
>  drivers/gpu/drm/i915/display/intel_dp.h |   3 +
>  2 files changed, 190 insertions(+)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
> b/drivers/gpu/drm/i915/display/intel_dp.c
> index 5bbc55113325..3df3533a1768 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.c
> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
> @@ -4940,6 +4940,193 @@ void intel_dp_set_infoframes(struct intel_encoder
> *encoder,
>  	intel_write_dp_sdp(encoder, crtc_state,
> HDMI_PACKET_TYPE_GAMUT_METADATA);  }
> 
> +static int intel_dp_vsc_sdp_unpack(struct drm_dp_vsc_sdp *vsc,
> +				   const void *buffer, size_t size) {
> +	const struct dp_sdp *sdp = buffer;
> +
> +	if (size < sizeof(struct dp_sdp))
> +		return -EINVAL;
> +
> +	memset(vsc, 0, size);
> +
> +	if (sdp->sdp_header.HB0 != 0)
> +		return -EINVAL;
> +
> +	if (sdp->sdp_header.HB1 != DP_SDP_VSC)
> +		return -EINVAL;
> +
> +	vsc->sdp_type = sdp->sdp_header.HB1;
> +	vsc->revision = sdp->sdp_header.HB2;
> +	vsc->length = sdp->sdp_header.HB3;
> +
> +	if ((sdp->sdp_header.HB2 == 0x2 && sdp->sdp_header.HB3 == 0x8) ||
> +	    (sdp->sdp_header.HB2 == 0x4 && sdp->sdp_header.HB3 == 0xe)) {
> +		/*
> +		 * - HB2 = 0x2, HB3 = 0x8
> +		 *   VSC SDP supporting 3D stereo + PSR
> +		 * - HB2 = 0x4, HB3 = 0xe
> +		 *   VSC SDP supporting 3D stereo + PSR2 with Y-coordinate of
> +		 *   first scan line of the SU region (applies to eDP v1.4b
> +		 *   and higher).
> +		 */
> +		return 0;
> +	} else if (sdp->sdp_header.HB2 == 0x5 && sdp->sdp_header.HB3 == 0x13) {
> +		/*
> +		 * - HB2 = 0x5, HB3 = 0x13
> +		 *   VSC SDP supporting 3D stereo + PSR2 + Pixel
> Encoding/Colorimetry
> +		 *   Format.
> +		 */
> +		vsc->pixelformat = (sdp->db[16] >> 4) & 0xf;
> +		vsc->colorimetry = sdp->db[16] & 0xf;
> +		vsc->dynamic_range = (sdp->db[17] >> 7) & 0x1;
> +
> +		switch (sdp->db[17] & 0x7) {
> +		case 0x0:
> +			vsc->bpc = 6;
> +			break;
> +		case 0x1:
> +			vsc->bpc = 8;
> +			break;
> +		case 0x2:
> +			vsc->bpc = 10;
> +			break;
> +		case 0x3:
> +			vsc->bpc = 12;
> +			break;
> +		case 0x4:
> +			vsc->bpc = 16;
> +			break;
> +		default:
> +			MISSING_CASE(sdp->db[17] & 0x7);
> +			return -EINVAL;
> +		}
> +
> +		vsc->content_type = sdp->db[18] & 0x7;
> +	} else {
> +		return -EINVAL;
> +	}
> +
> +	return 0;
> +}
> +
> +static int
> +intel_dp_hdr_metadata_infoframe_sdp_unpack(struct hdmi_drm_infoframe
> *drm_infoframe,
> +					   const void *buffer, size_t size) {
> +	int ret;
> +
> +	const struct dp_sdp *sdp = buffer;
> +
> +	if (size < sizeof(struct dp_sdp))
> +		return -EINVAL;
> +
> +	if (sdp->sdp_header.HB0 != 0)
> +		return -EINVAL;
> +
> +	if (sdp->sdp_header.HB1 != HDMI_INFOFRAME_TYPE_DRM)
> +		return -EINVAL;
> +
> +	/*
> +	 * Least Significant Eight Bits of (Data Byte Count – 1)
> +	 * 1Dh (i.e., Data Byte Count = 30 bytes).
> +	 */
> +	if (sdp->sdp_header.HB2 != 0x1D)
> +		return -EINVAL;
> +
> +	/* Most Significant Two Bits of (Data Byte Count – 1), Clear to 00b. */
> +	if ((sdp->sdp_header.HB3 & 0x3) != 0)
> +		return -EINVAL;
> +
> +	/* INFOFRAME SDP Version Number */
> +	if (((sdp->sdp_header.HB3 >> 2) & 0x3f) != 0x13)
> +		return -EINVAL;
> +
> +	/* CTA Header Byte 2 (INFOFRAME Version Number) */
> +	if (sdp->db[0] != 1)
> +		return -EINVAL;
> +
> +	/* CTA Header Byte 3 (Length of INFOFRAME):
> HDMI_DRM_INFOFRAME_SIZE */
> +	if (sdp->db[1] != HDMI_DRM_INFOFRAME_SIZE)
> +		return -EINVAL;
> +
> +	ret = hdmi_drm_infoframe_unpack_only(drm_infoframe, &sdp->db[2],
> +					     HDMI_DRM_INFOFRAME_SIZE);
> +
> +	return ret;
> +}
> +
> +static void intel_read_dp_vsc_sdp(struct intel_encoder *encoder,
> +				  struct intel_crtc_state *crtc_state,
> +				  struct drm_dp_vsc_sdp *vsc)
> +{
> +	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
> +	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
> +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> +	unsigned int type = DP_SDP_VSC;
> +	struct dp_sdp sdp = {};
> +	int ret;
> +
> +	/* When PSR is enabled, VSC SDP is handled by PSR routine */
> +	if (intel_psr_enabled(intel_dp))
> +		return;
> +
> +	if ((crtc_state->infoframes.enable &
> +	     intel_hdmi_infoframe_enable(type)) == 0)
> +		return;
> +
> +	intel_dig_port->read_infoframe(encoder, crtc_state, type, &sdp,
> +sizeof(sdp));
> +
> +	ret = intel_dp_vsc_sdp_unpack(vsc, &sdp, sizeof(sdp));
> +
> +	if (ret)
> +		drm_dbg_kms(&dev_priv->drm, "Failed to unpack DP VSC SDP\n"); }
> +
> +static void intel_read_dp_hdr_metadata_infoframe_sdp(struct intel_encoder
> *encoder,
> +						     struct intel_crtc_state
> *crtc_state,
> +						     struct hdmi_drm_infoframe
> *drm_infoframe) {
> +	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
> +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
> +	unsigned int type = HDMI_PACKET_TYPE_GAMUT_METADATA;
> +	struct dp_sdp sdp = {};
> +	int ret;
> +
> +	if ((crtc_state->infoframes.enable &
> +	    intel_hdmi_infoframe_enable(type)) == 0)
> +		return;
> +
> +	intel_dig_port->read_infoframe(encoder, crtc_state, type, &sdp,
> +				       sizeof(sdp));
> +
> +	ret = intel_dp_hdr_metadata_infoframe_sdp_unpack(drm_infoframe, &sdp,
> +							 sizeof(sdp));
> +
> +	if (ret)
> +		drm_dbg_kms(&dev_priv->drm,
> +			    "Failed to unpack DP HDR Metadata Infoframe SDP\n"); }
> +
> +void intel_read_dp_sdp(struct intel_encoder *encoder,
> +		       struct intel_crtc_state *crtc_state,
> +		       unsigned int type)
> +{
> +	switch (type) {
> +	case DP_SDP_VSC:
> +		intel_read_dp_vsc_sdp(encoder, crtc_state,
> +				      &crtc_state->infoframes.vsc);
> +		break;
> +	case HDMI_PACKET_TYPE_GAMUT_METADATA:
> +		intel_read_dp_hdr_metadata_infoframe_sdp(encoder, crtc_state,
> +							 &crtc_state-
> >infoframes.drm.drm);
> +		break;
> +	default:
> +		MISSING_CASE(type);
> +		break;
> +	}
> +}
> +
>  static void
>  intel_dp_setup_vsc_sdp(struct intel_dp *intel_dp,
>  		       const struct intel_crtc_state *crtc_state, diff --git
> a/drivers/gpu/drm/i915/display/intel_dp.h
> b/drivers/gpu/drm/i915/display/intel_dp.h
> index 0dc09a463ee1..e8f9ba962d09 100644
> --- a/drivers/gpu/drm/i915/display/intel_dp.h
> +++ b/drivers/gpu/drm/i915/display/intel_dp.h
> @@ -119,6 +119,9 @@ void intel_dp_hdr_metadata_enable(struct intel_dp
> *intel_dp,  void intel_dp_set_infoframes(struct intel_encoder *encoder, bool
> enable,
>  			     const struct intel_crtc_state *crtc_state,
>  			     const struct drm_connector_state *conn_state);
> +void intel_read_dp_sdp(struct intel_encoder *encoder,
> +		       struct intel_crtc_state *crtc_state,
> +		       unsigned int type);
>  bool intel_digital_port_connected(struct intel_encoder *encoder);
> 
>  static inline unsigned int intel_dp_unused_lane_mask(int lane_count)
> --
> 2.25.0
> 
> _______________________________________________
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> Intel-gfx@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/intel-gfx
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RE: [PATCH v7 14/18] drm/i915: Fix enabled infoframe states of lspcon

[Shankar, Uma]

> -----Original Message-----
> From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf Of Gwan-
> gyeong Mun
> Sent: Tuesday, February 11, 2020 1:17 PM
> To: intel-gfx@lists.freedesktop.org
> Cc: linux-fbdev@vger.kernel.org; dri-devel@lists.freedesktop.org
> Subject: [PATCH v7 14/18] drm/i915: Fix enabled infoframe states of lspcon
> 
> Compared to implementation of DP and HDMI's encoder->infoframes_enabled, the
> lspcon's implementation returns its active state. (we expect enabled infoframe
> states of HW.) It leads to pipe state mismatch error when ddi_get_config is called.
> 
> Because the current implementation of lspcon is not ready to support readout
> infoframes, we need to return 0 here.
> 
> In order to support readout to lspcon, we need to implement read_infoframe and
> infoframes_enabled. And set_infoframes also have to set an appropriate bit on
> crtc_state->infoframes.enable

Looks good.
Reviewed-by: Uma Shankar <uma.shankar@intel.com>

> Cc: Ville Syrjälä <ville.syrjala@linux.intel.com>
> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> ---
>  drivers/gpu/drm/i915/display/intel_lspcon.c | 2 +-
>  1 file changed, 1 insertion(+), 1 deletion(-)
> 
> diff --git a/drivers/gpu/drm/i915/display/intel_lspcon.c
> b/drivers/gpu/drm/i915/display/intel_lspcon.c
> index d807c5648c87..6ff7b226f0a1 100644
> --- a/drivers/gpu/drm/i915/display/intel_lspcon.c
> +++ b/drivers/gpu/drm/i915/display/intel_lspcon.c
> @@ -522,7 +522,7 @@ u32 lspcon_infoframes_enabled(struct intel_encoder
> *encoder,
>  			      const struct intel_crtc_state *pipe_config)  {
>  	/* FIXME actually read this from the hw */
> -	return enc_to_intel_lspcon(encoder)->active;
> +	return 0;
>  }
> 
>  void lspcon_resume(struct intel_lspcon *lspcon)
> --
> 2.25.0
> 
> _______________________________________________
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> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel
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Re: [Intel-gfx] [PATCH v7 05/18] video/hdmi: Add Unpack only function for DRM infoframe

[Jani Nikula]

On Tue, 11 Feb 2020, Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> wrote:
> It adds an unpack only function for DRM infoframe for dynamic range and
> mastering infoframe readout.
> It unpacks the information data block contained in the binary buffer into
> a structured frame of the HDMI Dynamic Range and Mastering (DRM)
> information frame.
>
> In contrast to hdmi_drm_infoframe_unpack() function, it does not verify
> a checksum.
>
> It can be used for unpacking a DP HDR Metadata Infoframe SDP case.
> DP HDR Metadata Infoframe SDP uses the same Dynamic Range and Mastering
> (DRM) information (CTA-861-G spec.) such as HDMI DRM infoframe.
> But DP SDP header and payload structure are different from HDMI DRM
> Infoframe. Therefore unpacking DRM infoframe for DP requires skipping of
> a verifying checksum.
>
> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Bartlomiej, can I have your ack for merging this via drm-intel along
with the rest of the series, please?

BR,
Jani.


> ---
>  drivers/video/hdmi.c | 58 +++++++++++++++++++++++++++++++-------------
>  include/linux/hdmi.h |  2 ++
>  2 files changed, 43 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
> index 9c82e2a0a411..9818836d82b7 100644
> --- a/drivers/video/hdmi.c
> +++ b/drivers/video/hdmi.c
> @@ -1775,20 +1775,18 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
>  }
>  
>  /**
> - * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
> + * hdmi_drm_infoframe_unpack_only() - unpack binary buffer to a HDMI DRM infoframe
>   * @frame: HDMI DRM infoframe
>   * @buffer: source buffer
>   * @size: size of buffer
>   *
> - * Unpacks the information contained in binary @buffer into a structured
> + * Unpacks the information data block contained in binary @buffer into a structured
>   * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
> - * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
> - * specification.
>   *
>   * Returns 0 on success or a negative error code on failure.
>   */
> -static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
> -				     const void *buffer, size_t size)
> +int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
> +				   const void *buffer, size_t size)
>  {
>  	const u8 *ptr = buffer;
>  	const u8 *temp;
> @@ -1797,23 +1795,13 @@ static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
>  	int ret;
>  	int i;
>  
> -	if (size < HDMI_INFOFRAME_SIZE(DRM))
> -		return -EINVAL;
> -
> -	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
> -	    ptr[1] != 1 ||
> -	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
> -		return -EINVAL;
> -
> -	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
> +	if (size < HDMI_DRM_INFOFRAME_SIZE)
>  		return -EINVAL;
>  
>  	ret = hdmi_drm_infoframe_init(frame);
>  	if (ret)
>  		return ret;
>  
> -	ptr += HDMI_INFOFRAME_HEADER_SIZE;
> -
>  	frame->eotf = ptr[0] & 0x7;
>  	frame->metadata_type = ptr[1] & 0x7;
>  
> @@ -1837,6 +1825,42 @@ static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
>  
>  	return 0;
>  }
> +EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
> +
> +/**
> + * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
> + * @frame: HDMI DRM infoframe
> + * @buffer: source buffer
> + * @size: size of buffer
> + *
> + * Unpacks the information contained in binary @buffer into a structured
> + * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
> + * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
> + * specification.
> + *
> + * Returns 0 on success or a negative error code on failure.
> + */
> +static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
> +				     const void *buffer, size_t size)
> +{
> +	const u8 *ptr = buffer;
> +	int ret;
> +
> +	if (size < HDMI_INFOFRAME_SIZE(DRM))
> +		return -EINVAL;
> +
> +	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
> +	    ptr[1] != 1 ||
> +	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
> +		return -EINVAL;
> +
> +	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
> +		return -EINVAL;
> +
> +	ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
> +					     size - HDMI_INFOFRAME_HEADER_SIZE);
> +	return ret;
> +}
>  
>  /**
>   * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
> diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
> index 9918a6c910c5..afb43efc03e0 100644
> --- a/include/linux/hdmi.h
> +++ b/include/linux/hdmi.h
> @@ -219,6 +219,8 @@ ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame, void *buffer,
>  ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
>  				     void *buffer, size_t size);
>  int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame);
> +int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
> +				   const void *buffer, size_t size);
>  
>  enum hdmi_spd_sdi {
>  	HDMI_SPD_SDI_UNKNOWN,

-- 
Jani Nikula, Intel Open Source Graphics Center
_______________________________________________
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https://lists.freedesktop.org/mailman/listinfo/dri-devel

Re: [Intel-gfx] [PATCH v7 05/18] video/hdmi: Add Unpack only function for DRM infoframe

[Jani Nikula]

On Fri, 20 Mar 2020, Jani Nikula <jani.nikula@linux.intel.com> wrote:
> On Tue, 11 Feb 2020, Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> wrote:
>> It adds an unpack only function for DRM infoframe for dynamic range and
>> mastering infoframe readout.
>> It unpacks the information data block contained in the binary buffer into
>> a structured frame of the HDMI Dynamic Range and Mastering (DRM)
>> information frame.
>>
>> In contrast to hdmi_drm_infoframe_unpack() function, it does not verify
>> a checksum.
>>
>> It can be used for unpacking a DP HDR Metadata Infoframe SDP case.
>> DP HDR Metadata Infoframe SDP uses the same Dynamic Range and Mastering
>> (DRM) information (CTA-861-G spec.) such as HDMI DRM infoframe.
>> But DP SDP header and payload structure are different from HDMI DRM
>> Infoframe. Therefore unpacking DRM infoframe for DP requires skipping of
>> a verifying checksum.
>>
>> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
>> Reviewed-by: Uma Shankar <uma.shankar@intel.com>
>
> Bartlomiej, can I have your ack for merging this via drm-intel along
> with the rest of the series, please?

Or Hans or Laurent, from v4l/video point of view.

Thanks,
Jani.

>
> BR,
> Jani.
>
>
>> ---
>>  drivers/video/hdmi.c | 58 +++++++++++++++++++++++++++++++-------------
>>  include/linux/hdmi.h |  2 ++
>>  2 files changed, 43 insertions(+), 17 deletions(-)
>>
>> diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
>> index 9c82e2a0a411..9818836d82b7 100644
>> --- a/drivers/video/hdmi.c
>> +++ b/drivers/video/hdmi.c
>> @@ -1775,20 +1775,18 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
>>  }
>>  
>>  /**
>> - * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
>> + * hdmi_drm_infoframe_unpack_only() - unpack binary buffer to a HDMI DRM infoframe
>>   * @frame: HDMI DRM infoframe
>>   * @buffer: source buffer
>>   * @size: size of buffer
>>   *
>> - * Unpacks the information contained in binary @buffer into a structured
>> + * Unpacks the information data block contained in binary @buffer into a structured
>>   * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
>> - * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
>> - * specification.
>>   *
>>   * Returns 0 on success or a negative error code on failure.
>>   */
>> -static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
>> -				     const void *buffer, size_t size)
>> +int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
>> +				   const void *buffer, size_t size)
>>  {
>>  	const u8 *ptr = buffer;
>>  	const u8 *temp;
>> @@ -1797,23 +1795,13 @@ static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
>>  	int ret;
>>  	int i;
>>  
>> -	if (size < HDMI_INFOFRAME_SIZE(DRM))
>> -		return -EINVAL;
>> -
>> -	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
>> -	    ptr[1] != 1 ||
>> -	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
>> -		return -EINVAL;
>> -
>> -	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
>> +	if (size < HDMI_DRM_INFOFRAME_SIZE)
>>  		return -EINVAL;
>>  
>>  	ret = hdmi_drm_infoframe_init(frame);
>>  	if (ret)
>>  		return ret;
>>  
>> -	ptr += HDMI_INFOFRAME_HEADER_SIZE;
>> -
>>  	frame->eotf = ptr[0] & 0x7;
>>  	frame->metadata_type = ptr[1] & 0x7;
>>  
>> @@ -1837,6 +1825,42 @@ static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
>>  
>>  	return 0;
>>  }
>> +EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
>> +
>> +/**
>> + * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
>> + * @frame: HDMI DRM infoframe
>> + * @buffer: source buffer
>> + * @size: size of buffer
>> + *
>> + * Unpacks the information contained in binary @buffer into a structured
>> + * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
>> + * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
>> + * specification.
>> + *
>> + * Returns 0 on success or a negative error code on failure.
>> + */
>> +static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
>> +				     const void *buffer, size_t size)
>> +{
>> +	const u8 *ptr = buffer;
>> +	int ret;
>> +
>> +	if (size < HDMI_INFOFRAME_SIZE(DRM))
>> +		return -EINVAL;
>> +
>> +	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
>> +	    ptr[1] != 1 ||
>> +	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
>> +		return -EINVAL;
>> +
>> +	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
>> +		return -EINVAL;
>> +
>> +	ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
>> +					     size - HDMI_INFOFRAME_HEADER_SIZE);
>> +	return ret;
>> +}
>>  
>>  /**
>>   * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
>> diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
>> index 9918a6c910c5..afb43efc03e0 100644
>> --- a/include/linux/hdmi.h
>> +++ b/include/linux/hdmi.h
>> @@ -219,6 +219,8 @@ ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame, void *buffer,
>>  ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
>>  				     void *buffer, size_t size);
>>  int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame);
>> +int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
>> +				   const void *buffer, size_t size);
>>  
>>  enum hdmi_spd_sdi {
>>  	HDMI_SPD_SDI_UNKNOWN,

-- 
Jani Nikula, Intel Open Source Graphics Center
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Re: [Intel-gfx] [PATCH v7 05/18] video/hdmi: Add Unpack only function for DRM infoframe

[Laurent Pinchart]

Hi Jani,

On Fri, Mar 20, 2020 at 01:32:17PM +0200, Jani Nikula wrote:
> On Fri, 20 Mar 2020, Jani Nikula <jani.nikula@linux.intel.com> wrote:
> > On Tue, 11 Feb 2020, Gwan-gyeong Mun <gwan-gyeong.mun@intel.com> wrote:
> >> It adds an unpack only function for DRM infoframe for dynamic range and
> >> mastering infoframe readout.
> >> It unpacks the information data block contained in the binary buffer into
> >> a structured frame of the HDMI Dynamic Range and Mastering (DRM)
> >> information frame.
> >>
> >> In contrast to hdmi_drm_infoframe_unpack() function, it does not verify
> >> a checksum.
> >>
> >> It can be used for unpacking a DP HDR Metadata Infoframe SDP case.
> >> DP HDR Metadata Infoframe SDP uses the same Dynamic Range and Mastering
> >> (DRM) information (CTA-861-G spec.) such as HDMI DRM infoframe.
> >> But DP SDP header and payload structure are different from HDMI DRM
> >> Infoframe. Therefore unpacking DRM infoframe for DP requires skipping of
> >> a verifying checksum.
> >>
> >> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> >> Reviewed-by: Uma Shankar <uma.shankar@intel.com>
> >
> > Bartlomiej, can I have your ack for merging this via drm-intel along
> > with the rest of the series, please?
> 
> Or Hans or Laurent, from v4l/video point of view.

I'm no expert on InfoFrame, I'll only comment on the API below.

> >> ---
> >>  drivers/video/hdmi.c | 58 +++++++++++++++++++++++++++++++-------------
> >>  include/linux/hdmi.h |  2 ++
> >>  2 files changed, 43 insertions(+), 17 deletions(-)
> >>
> >> diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
> >> index 9c82e2a0a411..9818836d82b7 100644
> >> --- a/drivers/video/hdmi.c
> >> +++ b/drivers/video/hdmi.c
> >> @@ -1775,20 +1775,18 @@ hdmi_vendor_any_infoframe_unpack(union hdmi_vendor_any_infoframe *frame,
> >>  }
> >>  
> >>  /**
> >> - * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
> >> + * hdmi_drm_infoframe_unpack_only() - unpack binary buffer to a HDMI DRM infoframe
> >>   * @frame: HDMI DRM infoframe
> >>   * @buffer: source buffer
> >>   * @size: size of buffer
> >>   *
> >> - * Unpacks the information contained in binary @buffer into a structured
> >> + * Unpacks the information data block contained in binary @buffer into a structured

Line wrap please.

This needs to be clarified to explain exactly what the buffer points to.

Also, as this is applicable to DP too, shouldn't we drop the hdmi_
prefix ? Is there another prefix that could be used for functions that
are application to infoframe handling shared by different display
interfaces ? A bit of refactoring would help making all this clear.

> >>   * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
> >> - * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
> >> - * specification.
> >>   *
> >>   * Returns 0 on success or a negative error code on failure.
> >>   */
> >> -static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
> >> -				     const void *buffer, size_t size)
> >> +int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
> >> +				   const void *buffer, size_t size)
> >>  {
> >>  	const u8 *ptr = buffer;
> >>  	const u8 *temp;
> >> @@ -1797,23 +1795,13 @@ static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
> >>  	int ret;
> >>  	int i;
> >>  
> >> -	if (size < HDMI_INFOFRAME_SIZE(DRM))
> >> -		return -EINVAL;
> >> -
> >> -	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
> >> -	    ptr[1] != 1 ||
> >> -	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
> >> -		return -EINVAL;
> >> -
> >> -	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
> >> +	if (size < HDMI_DRM_INFOFRAME_SIZE)
> >>  		return -EINVAL;
> >>  
> >>  	ret = hdmi_drm_infoframe_init(frame);
> >>  	if (ret)
> >>  		return ret;
> >>  
> >> -	ptr += HDMI_INFOFRAME_HEADER_SIZE;
> >> -
> >>  	frame->eotf = ptr[0] & 0x7;
> >>  	frame->metadata_type = ptr[1] & 0x7;
> >>  
> >> @@ -1837,6 +1825,42 @@ static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
> >>  
> >>  	return 0;
> >>  }
> >> +EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
> >> +
> >> +/**
> >> + * hdmi_drm_infoframe_unpack() - unpack binary buffer to a HDMI DRM infoframe
> >> + * @frame: HDMI DRM infoframe
> >> + * @buffer: source buffer
> >> + * @size: size of buffer
> >> + *
> >> + * Unpacks the information contained in binary @buffer into a structured

Same here. The difference between the two functions is "information data
block" vs. "information", it's very unclear to the reader without
looking at either the commit message or the implementation.

> >> + * @frame of the HDMI Dynamic Range and Mastering (DRM) information frame.
> >> + * Also verifies the checksum as required by section 5.3.5 of the HDMI 1.4
> >> + * specification.
> >> + *
> >> + * Returns 0 on success or a negative error code on failure.
> >> + */
> >> +static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
> >> +				     const void *buffer, size_t size)
> >> +{
> >> +	const u8 *ptr = buffer;
> >> +	int ret;
> >> +
> >> +	if (size < HDMI_INFOFRAME_SIZE(DRM))
> >> +		return -EINVAL;
> >> +
> >> +	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
> >> +	    ptr[1] != 1 ||
> >> +	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
> >> +		return -EINVAL;
> >> +
> >> +	if (hdmi_infoframe_checksum(buffer, HDMI_INFOFRAME_SIZE(DRM)) != 0)
> >> +		return -EINVAL;
> >> +
> >> +	ret = hdmi_drm_infoframe_unpack_only(frame, ptr + HDMI_INFOFRAME_HEADER_SIZE,
> >> +					     size - HDMI_INFOFRAME_HEADER_SIZE);
> >> +	return ret;
> >> +}
> >>  
> >>  /**
> >>   * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI infoframe
> >> diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
> >> index 9918a6c910c5..afb43efc03e0 100644
> >> --- a/include/linux/hdmi.h
> >> +++ b/include/linux/hdmi.h
> >> @@ -219,6 +219,8 @@ ssize_t hdmi_drm_infoframe_pack(struct hdmi_drm_infoframe *frame, void *buffer,
> >>  ssize_t hdmi_drm_infoframe_pack_only(const struct hdmi_drm_infoframe *frame,
> >>  				     void *buffer, size_t size);
> >>  int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe *frame);
> >> +int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe *frame,
> >> +				   const void *buffer, size_t size);
> >>  
> >>  enum hdmi_spd_sdi {
> >>  	HDMI_SPD_SDI_UNKNOWN,

-- 
Regards,

Laurent Pinchart
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RE: [PATCH v7 04/18] drm/i915/dp: Add writing of DP SDPs

[Jani Nikula]

On Mon, 16 Mar 2020, "Shankar, Uma" <uma.shankar@intel.com> wrote:
>> -----Original Message-----
>> From: dri-devel <dri-devel-bounces@lists.freedesktop.org> On Behalf Of Gwan-
>> gyeong Mun
>> Sent: Tuesday, February 11, 2020 1:17 PM
>> To: intel-gfx@lists.freedesktop.org
>> Cc: linux-fbdev@vger.kernel.org; dri-devel@lists.freedesktop.org
>> Subject: [PATCH v7 04/18] drm/i915/dp: Add writing of DP SDPs
>> 
>> It adds routines that write DP VSC SDP and DP HDR Metadata Infoframe SDP.
>> In order to pack DP VSC SDP, it adds intel_dp_vsc_sdp_pack() function.
>> It follows DP 1.4a spec. [Table 2-116: VSC SDP Header Bytes] and [Table 2-117: VSC
>> SDP Payload for DB16 through DB18]
>> 
>> In order to pack DP HDR Metadata Infoframe SDP, it adds
>> intel_dp_hdr_metadata_infoframe_sdp_pack() function.
>> And it follows DP 1.4a spec.
>> ([Table 2-125: INFOFRAME SDP v1.2 Header Bytes] and [Table 2-126: INFOFRAME
>> SDP v1.2 Payload Data Bytes - DB0 through DB31]) and CTA-861-G spec. [Table-42
>> Dynamic Range and Mastering InfoFrame].
>> 
>> A mechanism and a naming rule of intel_dp_set_infoframes() function references
>> intel_encoder->set_infoframes() of intel_hdmi.c .
>> VSC SDP is used for PSR and Pixel Encoding and Colorimetry Formats cases.
>> Because PSR routine has its own routine of writing a VSC SDP, when the PSR is
>> enabled, intel_dp_set_infoframes() does not write a VSC SDP.
>> 
>> v3:
>>   - Explicitly disable unused DIPs (AVI, GCP, VS, SPD, DRM. They will be
>>     used for HDMI), when intel_dp_set_infoframes() function will be called.
>>   - Replace a structure name to drm_dp_vsc_sdp from intel_dp_vsc_sdp.
>> v4: Use struct drm_device logging macros
>> v5:
>>   - use intel_de_*() functions for register access
>>   - Addressed review comments from Uma
>>     Polish commit message and comments
>>     Add 6bpc to packing of VSC SDP
>
> Looks good to me.
> Reviewed-by: Uma Shankar <uma.shankar@intel.com>

Pushed up to and including this patch, thanks for the patches and
review.

BR,
Jani.

>
>> Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
>> ---
>>  drivers/gpu/drm/i915/display/intel_dp.c | 199 ++++++++++++++++++++++++
>>  drivers/gpu/drm/i915/display/intel_dp.h |   3 +
>>  2 files changed, 202 insertions(+)
>> 
>> diff --git a/drivers/gpu/drm/i915/display/intel_dp.c
>> b/drivers/gpu/drm/i915/display/intel_dp.c
>> index fb008168ca83..5bbc55113325 100644
>> --- a/drivers/gpu/drm/i915/display/intel_dp.c
>> +++ b/drivers/gpu/drm/i915/display/intel_dp.c
>> @@ -4741,6 +4741,205 @@ intel_dp_needs_vsc_sdp(const struct intel_crtc_state
>> *crtc_state,
>>  	return false;
>>  }
>> 
>> +static ssize_t intel_dp_vsc_sdp_pack(const struct drm_dp_vsc_sdp *vsc,
>> +				     struct dp_sdp *sdp, size_t size) {
>> +	size_t length = sizeof(struct dp_sdp);
>> +
>> +	if (size < length)
>> +		return -ENOSPC;
>> +
>> +	memset(sdp, 0, size);
>> +
>> +	/*
>> +	 * Prepare VSC Header for SU as per DP 1.4a spec, Table 2-119
>> +	 * VSC SDP Header Bytes
>> +	 */
>> +	sdp->sdp_header.HB0 = 0; /* Secondary-Data Packet ID = 0 */
>> +	sdp->sdp_header.HB1 = vsc->sdp_type; /* Secondary-data Packet Type */
>> +	sdp->sdp_header.HB2 = vsc->revision; /* Revision Number */
>> +	sdp->sdp_header.HB3 = vsc->length; /* Number of Valid Data Bytes */
>> +
>> +	/* VSC SDP Payload for DB16 through DB18 */
>> +	/* Pixel Encoding and Colorimetry Formats  */
>> +	sdp->db[16] = (vsc->pixelformat & 0xf) << 4; /* DB16[7:4] */
>> +	sdp->db[16] |= vsc->colorimetry & 0xf; /* DB16[3:0] */
>> +
>> +	switch (vsc->bpc) {
>> +	case 6:
>> +		/* 6bpc: 0x0 */
>> +		break;
>> +	case 8:
>> +		sdp->db[17] = 0x1; /* DB17[3:0] */
>> +		break;
>> +	case 10:
>> +		sdp->db[17] = 0x2;
>> +		break;
>> +	case 12:
>> +		sdp->db[17] = 0x3;
>> +		break;
>> +	case 16:
>> +		sdp->db[17] = 0x4;
>> +		break;
>> +	default:
>> +		MISSING_CASE(vsc->bpc);
>> +		break;
>> +	}
>> +	/* Dynamic Range and Component Bit Depth */
>> +	if (vsc->dynamic_range == DP_DYNAMIC_RANGE_CTA)
>> +		sdp->db[17] |= 0x80;  /* DB17[7] */
>> +
>> +	/* Content Type */
>> +	sdp->db[18] = vsc->content_type & 0x7;
>> +
>> +	return length;
>> +}
>> +
>> +static ssize_t
>> +intel_dp_hdr_metadata_infoframe_sdp_pack(const struct hdmi_drm_infoframe
>> *drm_infoframe,
>> +					 struct dp_sdp *sdp,
>> +					 size_t size)
>> +{
>> +	size_t length = sizeof(struct dp_sdp);
>> +	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;
>> +
>> +	if (size < length)
>> +		return -ENOSPC;
>> +
>> +	memset(sdp, 0, size);
>> +
>> +	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 -ENOSPC;
>> +	}
>> +
>> +	if (len != infoframe_size) {
>> +		DRM_DEBUG_KMS("wrong static hdr metadata size\n");
>> +		return -ENOSPC;
>> +	}
>> +
>> +	/*
>> +	 * 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
>> +	 */
>> +
>> +	/* Secondary-Data Packet ID, 00h for non-Audio INFOFRAME */
>> +	sdp->sdp_header.HB0 = 0;
>> +	/*
>> +	 * Packet Type 80h + Non-audio INFOFRAME Type value
>> +	 * HDMI_INFOFRAME_TYPE_DRM: 0x87
>> +	 * - 80h + Non-audio INFOFRAME Type value
>> +	 * - InfoFrame Type: 0x07
>> +	 *    [CTA-861-G Table-42 Dynamic Range and Mastering InfoFrame]
>> +	 */
>> +	sdp->sdp_header.HB1 = drm_infoframe->type;
>> +	/*
>> +	 * Least Significant Eight Bits of (Data Byte Count – 1)
>> +	 * infoframe_size - 1
>> +	 */
>> +	sdp->sdp_header.HB2 = 0x1D;
>> +	/* INFOFRAME SDP Version Number */
>> +	sdp->sdp_header.HB3 = (0x13 << 2);
>> +	/* CTA Header Byte 2 (INFOFRAME Version Number) */
>> +	sdp->db[0] = drm_infoframe->version;
>> +	/* CTA Header Byte 3 (Length of INFOFRAME):
>> HDMI_DRM_INFOFRAME_SIZE */
>> +	sdp->db[1] = drm_infoframe->length;
>> +	/*
>> +	 * Copy HDMI_DRM_INFOFRAME_SIZE size from a buffer after
>> +	 * HDMI_INFOFRAME_HEADER_SIZE
>> +	 */
>> +	BUILD_BUG_ON(sizeof(sdp->db) < HDMI_DRM_INFOFRAME_SIZE + 2);
>> +	memcpy(&sdp->db[2], &buf[HDMI_INFOFRAME_HEADER_SIZE],
>> +	       HDMI_DRM_INFOFRAME_SIZE);
>> +
>> +	/*
>> +	 * Size of DP infoframe sdp packet for HDR static metadata consists of
>> +	 * - DP SDP Header(struct dp_sdp_header): 4 bytes
>> +	 * - Two Data Blocks: 2 bytes
>> +	 *    CTA Header Byte2 (INFOFRAME Version Number)
>> +	 *    CTA Header Byte3 (Length of INFOFRAME)
>> +	 * - HDMI_DRM_INFOFRAME_SIZE: 26 bytes
>> +	 *
>> +	 * Prior to GEN11's GMP register size is identical to DP HDR static metadata
>> +	 * infoframe size. But GEN11+ has larger than that size, write_infoframe
>> +	 * will pad rest of the size.
>> +	 */
>> +	return sizeof(struct dp_sdp_header) + 2 + HDMI_DRM_INFOFRAME_SIZE; }
>> +
>> +static void intel_write_dp_sdp(struct intel_encoder *encoder,
>> +			       const struct intel_crtc_state *crtc_state,
>> +			       unsigned int type)
>> +{
>> +	struct intel_digital_port *intel_dig_port = enc_to_dig_port(encoder);
>> +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
>> +	struct dp_sdp sdp = {};
>> +	ssize_t len;
>> +
>> +	if ((crtc_state->infoframes.enable &
>> +	     intel_hdmi_infoframe_enable(type)) == 0)
>> +		return;
>> +
>> +	switch (type) {
>> +	case DP_SDP_VSC:
>> +		len = intel_dp_vsc_sdp_pack(&crtc_state->infoframes.vsc, &sdp,
>> +					    sizeof(sdp));
>> +		break;
>> +	case HDMI_PACKET_TYPE_GAMUT_METADATA:
>> +		len = intel_dp_hdr_metadata_infoframe_sdp_pack(&crtc_state-
>> >infoframes.drm.drm,
>> +							       &sdp, sizeof(sdp));
>> +		break;
>> +	default:
>> +		MISSING_CASE(type);
>> +		break;
>> +	}
>> +
>> +	if (drm_WARN_ON(&dev_priv->drm, len < 0))
>> +		return;
>> +
>> +	intel_dig_port->write_infoframe(encoder, crtc_state, type, &sdp, len);
>> +}
>> +
>> +void intel_dp_set_infoframes(struct intel_encoder *encoder,
>> +			     bool enable,
>> +			     const struct intel_crtc_state *crtc_state,
>> +			     const struct drm_connector_state *conn_state) {
>> +	struct drm_i915_private *dev_priv = to_i915(encoder->base.dev);
>> +	struct intel_dp *intel_dp = enc_to_intel_dp(encoder);
>> +	i915_reg_t reg = HSW_TVIDEO_DIP_CTL(crtc_state->cpu_transcoder);
>> +	u32 dip_enable = 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_DRM_GLK;
>> +	u32 val = intel_de_read(dev_priv, reg);
>> +
>> +	/* TODO: Add DSC case (DIP_ENABLE_PPS) */
>> +	/* When PSR is enabled, this routine doesn't disable VSC DIP */
>> +	if (intel_psr_enabled(intel_dp))
>> +		val &= ~dip_enable;
>> +	else
>> +		val &= ~(dip_enable | VIDEO_DIP_ENABLE_VSC_HSW);
>> +
>> +	if (!enable) {
>> +		intel_de_write(dev_priv, reg, val);
>> +		intel_de_posting_read(dev_priv, reg);
>> +		return;
>> +	}
>> +
>> +	intel_de_write(dev_priv, reg, val);
>> +	intel_de_posting_read(dev_priv, reg);
>> +
>> +	/* When PSR is enabled, VSC SDP is handled by PSR routine */
>> +	if (!intel_psr_enabled(intel_dp))
>> +		intel_write_dp_sdp(encoder, crtc_state, DP_SDP_VSC);
>> +
>> +	intel_write_dp_sdp(encoder, crtc_state,
>> +HDMI_PACKET_TYPE_GAMUT_METADATA); }
>> +
>>  static void
>>  intel_dp_setup_vsc_sdp(struct intel_dp *intel_dp,
>>  		       const struct intel_crtc_state *crtc_state, diff --git
>> a/drivers/gpu/drm/i915/display/intel_dp.h
>> b/drivers/gpu/drm/i915/display/intel_dp.h
>> index 3da166054788..0dc09a463ee1 100644
>> --- a/drivers/gpu/drm/i915/display/intel_dp.h
>> +++ b/drivers/gpu/drm/i915/display/intel_dp.h
>> @@ -116,6 +116,9 @@ void intel_dp_vsc_enable(struct intel_dp *intel_dp,  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);
>> +void intel_dp_set_infoframes(struct intel_encoder *encoder, bool enable,
>> +			     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)
>> --
>> 2.25.0
>> 
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Jani Nikula, Intel Open Source Graphics Center
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Re: [Intel-gfx] [PATCH v7 05/18] video/hdmi: Add Unpack only function for DRM infoframe

[Mun, Gwan-gyeong]

On Fri, 2020-03-20 at 13:57 +0200, Laurent Pinchart wrote:
> Hi Jani,
> 
> On Fri, Mar 20, 2020 at 01:32:17PM +0200, Jani Nikula wrote:
> > On Fri, 20 Mar 2020, Jani Nikula <jani.nikula@linux.intel.com>
> > wrote:
> > > On Tue, 11 Feb 2020, Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> > > wrote:
> > > > It adds an unpack only function for DRM infoframe for dynamic
> > > > range and
> > > > mastering infoframe readout.
> > > > It unpacks the information data block contained in the binary
> > > > buffer into
> > > > a structured frame of the HDMI Dynamic Range and Mastering
> > > > (DRM)
> > > > information frame.
> > > > 
> > > > In contrast to hdmi_drm_infoframe_unpack() function, it does
> > > > not verify
> > > > a checksum.
> > > > 
> > > > It can be used for unpacking a DP HDR Metadata Infoframe SDP
> > > > case.
> > > > DP HDR Metadata Infoframe SDP uses the same Dynamic Range and
> > > > Mastering
> > > > (DRM) information (CTA-861-G spec.) such as HDMI DRM infoframe.
> > > > But DP SDP header and payload structure are different from HDMI
> > > > DRM
> > > > Infoframe. Therefore unpacking DRM infoframe for DP requires
> > > > skipping of
> > > > a verifying checksum.
> > > > 
> > > > Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> > > > Reviewed-by: Uma Shankar <uma.shankar@intel.com>
> > > 
> > > Bartlomiej, can I have your ack for merging this via drm-intel
> > > along
> > > with the rest of the series, please?
> > 
> > Or Hans or Laurent, from v4l/video point of view.
> 
> I'm no expert on InfoFrame, I'll only comment on the API below.
> 
> > > > ---
> > > >  drivers/video/hdmi.c | 58 +++++++++++++++++++++++++++++++-----
> > > > --------
> > > >  include/linux/hdmi.h |  2 ++
> > > >  2 files changed, 43 insertions(+), 17 deletions(-)
> > > > 
> > > > diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
> > > > index 9c82e2a0a411..9818836d82b7 100644
> > > > --- a/drivers/video/hdmi.c
> > > > +++ b/drivers/video/hdmi.c
> > > > @@ -1775,20 +1775,18 @@ hdmi_vendor_any_infoframe_unpack(union
> > > > hdmi_vendor_any_infoframe *frame,
> > > >  }
> > > >  
> > > >  /**
> > > > - * hdmi_drm_infoframe_unpack() - unpack binary buffer to a
> > > > HDMI DRM infoframe
> > > > + * hdmi_drm_infoframe_unpack_only() - unpack binary buffer to
> > > > a HDMI DRM infoframe
> > > >   * @frame: HDMI DRM infoframe
> > > >   * @buffer: source buffer
> > > >   * @size: size of buffer
> > > >   *
> > > > - * Unpacks the information contained in binary @buffer into a
> > > > structured
> > > > + * Unpacks the information data block contained in binary
> > > > @buffer into a structured
> 
> Line wrap please.
> 
> This needs to be clarified to explain exactly what the buffer points
> to.
> 
Okay I'll update clear comments next version.
> Also, as this is applicable to DP too, shouldn't we drop the hdmi_
> prefix ? Is there another prefix that could be used for functions
> that
> are application to infoframe handling shared by different display
> interfaces ? A bit of refactoring would help making all this clear.
> 
Both DP and HDMI use CTA-861-G spec for DRM infoframe. I'll update
prefix with cta_ instead of hdmi_.
> > > >   * @frame of the HDMI Dynamic Range and Mastering (DRM)
> > > > information frame.
> > > > - * Also verifies the checksum as required by section 5.3.5 of
> > > > the HDMI 1.4
> > > > - * specification.
> > > >   *
> > > >   * Returns 0 on success or a negative error code on failure.
> > > >   */
> > > > -static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe
> > > > *frame,
> > > > -				     const void *buffer, size_t
> > > > size)
> > > > +int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe
> > > > *frame,
> > > > +				   const void *buffer, size_t
> > > > size)
> > > >  {
> > > >  	const u8 *ptr = buffer;
> > > >  	const u8 *temp;
> > > > @@ -1797,23 +1795,13 @@ static int
> > > > hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
> > > >  	int ret;
> > > >  	int i;
> > > >  
> > > > -	if (size < HDMI_INFOFRAME_SIZE(DRM))
> > > > -		return -EINVAL;
> > > > -
> > > > -	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
> > > > -	    ptr[1] != 1 ||
> > > > -	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
> > > > -		return -EINVAL;
> > > > -
> > > > -	if (hdmi_infoframe_checksum(buffer,
> > > > HDMI_INFOFRAME_SIZE(DRM)) != 0)
> > > > +	if (size < HDMI_DRM_INFOFRAME_SIZE)
> > > >  		return -EINVAL;
> > > >  
> > > >  	ret = hdmi_drm_infoframe_init(frame);
> > > >  	if (ret)
> > > >  		return ret;
> > > >  
> > > > -	ptr += HDMI_INFOFRAME_HEADER_SIZE;
> > > > -
> > > >  	frame->eotf = ptr[0] & 0x7;
> > > >  	frame->metadata_type = ptr[1] & 0x7;
> > > >  
> > > > @@ -1837,6 +1825,42 @@ static int
> > > > hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe *frame,
> > > >  
> > > >  	return 0;
> > > >  }
> > > > +EXPORT_SYMBOL(hdmi_drm_infoframe_unpack_only);
> > > > +
> > > > +/**
> > > > + * hdmi_drm_infoframe_unpack() - unpack binary buffer to a
> > > > HDMI DRM infoframe
> > > > + * @frame: HDMI DRM infoframe
> > > > + * @buffer: source buffer
> > > > + * @size: size of buffer
> > > > + *
> > > > + * Unpacks the information contained in binary @buffer into a
> > > > structured
> 
> Same here. The difference between the two functions is "information
> data
> block" vs. "information", it's very unclear to the reader without
> looking at either the commit message or the implementation.
> 
I'll update clear comments next version.

Thank you for giving me review comments.

G.G.

> > > > + * @frame of the HDMI Dynamic Range and Mastering (DRM)
> > > > information frame.
> > > > + * Also verifies the checksum as required by section 5.3.5 of
> > > > the HDMI 1.4
> > > > + * specification.
> > > > + *
> > > > + * Returns 0 on success or a negative error code on failure.
> > > > + */
> > > > +static int hdmi_drm_infoframe_unpack(struct hdmi_drm_infoframe
> > > > *frame,
> > > > +				     const void *buffer, size_t
> > > > size)
> > > > +{
> > > > +	const u8 *ptr = buffer;
> > > > +	int ret;
> > > > +
> > > > +	if (size < HDMI_INFOFRAME_SIZE(DRM))
> > > > +		return -EINVAL;
> > > > +
> > > > +	if (ptr[0] != HDMI_INFOFRAME_TYPE_DRM ||
> > > > +	    ptr[1] != 1 ||
> > > > +	    ptr[2] != HDMI_DRM_INFOFRAME_SIZE)
> > > > +		return -EINVAL;
> > > > +
> > > > +	if (hdmi_infoframe_checksum(buffer,
> > > > HDMI_INFOFRAME_SIZE(DRM)) != 0)
> > > > +		return -EINVAL;
> > > > +
> > > > +	ret = hdmi_drm_infoframe_unpack_only(frame, ptr +
> > > > HDMI_INFOFRAME_HEADER_SIZE,
> > > > +					     size -
> > > > HDMI_INFOFRAME_HEADER_SIZE);
> > > > +	return ret;
> > > > +}
> > > >  
> > > >  /**
> > > >   * hdmi_infoframe_unpack() - unpack binary buffer to a HDMI
> > > > infoframe
> > > > diff --git a/include/linux/hdmi.h b/include/linux/hdmi.h
> > > > index 9918a6c910c5..afb43efc03e0 100644
> > > > --- a/include/linux/hdmi.h
> > > > +++ b/include/linux/hdmi.h
> > > > @@ -219,6 +219,8 @@ ssize_t hdmi_drm_infoframe_pack(struct
> > > > hdmi_drm_infoframe *frame, void *buffer,
> > > >  ssize_t hdmi_drm_infoframe_pack_only(const struct
> > > > hdmi_drm_infoframe *frame,
> > > >  				     void *buffer, size_t
> > > > size);
> > > >  int hdmi_drm_infoframe_check(struct hdmi_drm_infoframe
> > > > *frame);
> > > > +int hdmi_drm_infoframe_unpack_only(struct hdmi_drm_infoframe
> > > > *frame,
> > > > +				   const void *buffer, size_t
> > > > size);
> > > >  
> > > >  enum hdmi_spd_sdi {
> > > >  	HDMI_SPD_SDI_UNKNOWN,
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Re: [Intel-gfx] [PATCH v7 05/18] video/hdmi: Add Unpack only function for DRM infoframe

[Ville Syrjälä]

On Fri, Mar 27, 2020 at 07:27:56AM +0000, Mun, Gwan-gyeong wrote:
> On Fri, 2020-03-20 at 13:57 +0200, Laurent Pinchart wrote:
> > Hi Jani,
> > 
> > On Fri, Mar 20, 2020 at 01:32:17PM +0200, Jani Nikula wrote:
> > > On Fri, 20 Mar 2020, Jani Nikula <jani.nikula@linux.intel.com>
> > > wrote:
> > > > On Tue, 11 Feb 2020, Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> > > > wrote:
> > > > > It adds an unpack only function for DRM infoframe for dynamic
> > > > > range and
> > > > > mastering infoframe readout.
> > > > > It unpacks the information data block contained in the binary
> > > > > buffer into
> > > > > a structured frame of the HDMI Dynamic Range and Mastering
> > > > > (DRM)
> > > > > information frame.
> > > > > 
> > > > > In contrast to hdmi_drm_infoframe_unpack() function, it does
> > > > > not verify
> > > > > a checksum.
> > > > > 
> > > > > It can be used for unpacking a DP HDR Metadata Infoframe SDP
> > > > > case.
> > > > > DP HDR Metadata Infoframe SDP uses the same Dynamic Range and
> > > > > Mastering
> > > > > (DRM) information (CTA-861-G spec.) such as HDMI DRM infoframe.
> > > > > But DP SDP header and payload structure are different from HDMI
> > > > > DRM
> > > > > Infoframe. Therefore unpacking DRM infoframe for DP requires
> > > > > skipping of
> > > > > a verifying checksum.
> > > > > 
> > > > > Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> > > > > Reviewed-by: Uma Shankar <uma.shankar@intel.com>
> > > > 
> > > > Bartlomiej, can I have your ack for merging this via drm-intel
> > > > along
> > > > with the rest of the series, please?
> > > 
> > > Or Hans or Laurent, from v4l/video point of view.
> > 
> > I'm no expert on InfoFrame, I'll only comment on the API below.
> > 
> > > > > ---
> > > > >  drivers/video/hdmi.c | 58 +++++++++++++++++++++++++++++++-----
> > > > > --------
> > > > >  include/linux/hdmi.h |  2 ++
> > > > >  2 files changed, 43 insertions(+), 17 deletions(-)
> > > > > 
> > > > > diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
> > > > > index 9c82e2a0a411..9818836d82b7 100644
> > > > > --- a/drivers/video/hdmi.c
> > > > > +++ b/drivers/video/hdmi.c
> > > > > @@ -1775,20 +1775,18 @@ hdmi_vendor_any_infoframe_unpack(union
> > > > > hdmi_vendor_any_infoframe *frame,
> > > > >  }
> > > > >  
> > > > >  /**
> > > > > - * hdmi_drm_infoframe_unpack() - unpack binary buffer to a
> > > > > HDMI DRM infoframe
> > > > > + * hdmi_drm_infoframe_unpack_only() - unpack binary buffer to
> > > > > a HDMI DRM infoframe
> > > > >   * @frame: HDMI DRM infoframe
> > > > >   * @buffer: source buffer
> > > > >   * @size: size of buffer
> > > > >   *
> > > > > - * Unpacks the information contained in binary @buffer into a
> > > > > structured
> > > > > + * Unpacks the information data block contained in binary
> > > > > @buffer into a structured
> > 
> > Line wrap please.
> > 
> > This needs to be clarified to explain exactly what the buffer points
> > to.
> > 
> Okay I'll update clear comments next version.
> > Also, as this is applicable to DP too, shouldn't we drop the hdmi_
> > prefix ? Is there another prefix that could be used for functions
> > that
> > are application to infoframe handling shared by different display
> > interfaces ? A bit of refactoring would help making all this clear.
> > 
> Both DP and HDMI use CTA-861-G spec for DRM infoframe. I'll update
> prefix with cta_ instead of hdmi_.

Most of video/hdmi.c is from the CTA spec(s). The name is just a name.
Let's not start making it inconsistent just for this one case.

-- 
Ville Syrjälä
Intel
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Re: [Intel-gfx] [PATCH v7 05/18] video/hdmi: Add Unpack only function for DRM infoframe

[Mun, Gwan-gyeong]

On Fri, 2020-03-27 at 14:56 +0200, Ville Syrjälä wrote:
> On Fri, Mar 27, 2020 at 07:27:56AM +0000, Mun, Gwan-gyeong wrote:
> > On Fri, 2020-03-20 at 13:57 +0200, Laurent Pinchart wrote:
> > > Hi Jani,
> > > 
> > > On Fri, Mar 20, 2020 at 01:32:17PM +0200, Jani Nikula wrote:
> > > > On Fri, 20 Mar 2020, Jani Nikula <jani.nikula@linux.intel.com>
> > > > wrote:
> > > > > On Tue, 11 Feb 2020, Gwan-gyeong Mun <
> > > > > gwan-gyeong.mun@intel.com>
> > > > > wrote:
> > > > > > It adds an unpack only function for DRM infoframe for
> > > > > > dynamic
> > > > > > range and
> > > > > > mastering infoframe readout.
> > > > > > It unpacks the information data block contained in the
> > > > > > binary
> > > > > > buffer into
> > > > > > a structured frame of the HDMI Dynamic Range and Mastering
> > > > > > (DRM)
> > > > > > information frame.
> > > > > > 
> > > > > > In contrast to hdmi_drm_infoframe_unpack() function, it
> > > > > > does
> > > > > > not verify
> > > > > > a checksum.
> > > > > > 
> > > > > > It can be used for unpacking a DP HDR Metadata Infoframe
> > > > > > SDP
> > > > > > case.
> > > > > > DP HDR Metadata Infoframe SDP uses the same Dynamic Range
> > > > > > and
> > > > > > Mastering
> > > > > > (DRM) information (CTA-861-G spec.) such as HDMI DRM
> > > > > > infoframe.
> > > > > > But DP SDP header and payload structure are different from
> > > > > > HDMI
> > > > > > DRM
> > > > > > Infoframe. Therefore unpacking DRM infoframe for DP
> > > > > > requires
> > > > > > skipping of
> > > > > > a verifying checksum.
> > > > > > 
> > > > > > Signed-off-by: Gwan-gyeong Mun <gwan-gyeong.mun@intel.com>
> > > > > > Reviewed-by: Uma Shankar <uma.shankar@intel.com>
> > > > > 
> > > > > Bartlomiej, can I have your ack for merging this via drm-
> > > > > intel
> > > > > along
> > > > > with the rest of the series, please?
> > > > 
> > > > Or Hans or Laurent, from v4l/video point of view.
> > > 
> > > I'm no expert on InfoFrame, I'll only comment on the API below.
> > > 
> > > > > > ---
> > > > > >  drivers/video/hdmi.c | 58 +++++++++++++++++++++++++++++++-
> > > > > > ----
> > > > > > --------
> > > > > >  include/linux/hdmi.h |  2 ++
> > > > > >  2 files changed, 43 insertions(+), 17 deletions(-)
> > > > > > 
> > > > > > diff --git a/drivers/video/hdmi.c b/drivers/video/hdmi.c
> > > > > > index 9c82e2a0a411..9818836d82b7 100644
> > > > > > --- a/drivers/video/hdmi.c
> > > > > > +++ b/drivers/video/hdmi.c
> > > > > > @@ -1775,20 +1775,18 @@
> > > > > > hdmi_vendor_any_infoframe_unpack(union
> > > > > > hdmi_vendor_any_infoframe *frame,
> > > > > >  }
> > > > > >  
> > > > > >  /**
> > > > > > - * hdmi_drm_infoframe_unpack() - unpack binary buffer to a
> > > > > > HDMI DRM infoframe
> > > > > > + * hdmi_drm_infoframe_unpack_only() - unpack binary buffer
> > > > > > to
> > > > > > a HDMI DRM infoframe
> > > > > >   * @frame: HDMI DRM infoframe
> > > > > >   * @buffer: source buffer
> > > > > >   * @size: size of buffer
> > > > > >   *
> > > > > > - * Unpacks the information contained in binary @buffer
> > > > > > into a
> > > > > > structured
> > > > > > + * Unpacks the information data block contained in binary
> > > > > > @buffer into a structured
> > > 
> > > Line wrap please.
> > > 
> > > This needs to be clarified to explain exactly what the buffer
> > > points
> > > to.
> > > 
> > Okay I'll update clear comments next version.
> > > Also, as this is applicable to DP too, shouldn't we drop the
> > > hdmi_
> > > prefix ? Is there another prefix that could be used for functions
> > > that
> > > are application to infoframe handling shared by different display
> > > interfaces ? A bit of refactoring would help making all this
> > > clear.
> > > 
> > Both DP and HDMI use CTA-861-G spec for DRM infoframe. I'll update
> > prefix with cta_ instead of hdmi_.
> 
> Most of video/hdmi.c is from the CTA spec(s). The name is just a
> name.
> Let's not start making it inconsistent just for this one case.
> 
Hi Ville, thank you for giving me your opinion.
And I agree with your opinion.
I'll update detailed comments with consistent API namings.
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