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* [PATCH] drm: Parse Colorimetry data block from EDID
@ 2020-08-26 14:23 Algea Cao
  2020-08-27  7:34 ` Printing bitfields in the kernel (Re: [PATCH] drm: Parse Colorimetry data block from EDID) Pekka Paalanen
  2020-08-27 10:57 ` [PATCH] drm: Parse Colorimetry data block from EDID Ville Syrjälä
  0 siblings, 2 replies; 8+ messages in thread
From: Algea Cao @ 2020-08-26 14:23 UTC (permalink / raw)
  To: mripard, tzimmermann, linux-kernel, airlied, dri-devel,
	maarten.lankhorst, daniel, linux-rockchip
  Cc: Algea Cao

CEA 861.3 spec adds colorimetry data block for HDMI.
Parsing the block to get the colorimetry data from
panel.

Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
---

 drivers/gpu/drm/drm_edid.c  | 45 +++++++++++++++++++++++++++++++++++++
 include/drm/drm_connector.h |  3 +++
 include/drm/drm_edid.h      | 14 ++++++++++++
 3 files changed, 62 insertions(+)

diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
index 31496b6cfc56..67e607c04492 100644
--- a/drivers/gpu/drm/drm_edid.c
+++ b/drivers/gpu/drm/drm_edid.c
@@ -3223,6 +3223,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
 #define VIDEO_BLOCK     0x02
 #define VENDOR_BLOCK    0x03
 #define SPEAKER_BLOCK	0x04
+#define COLORIMETRY_DATA_BLOCK		0x5
 #define HDR_STATIC_METADATA_BLOCK	0x6
 #define USE_EXTENDED_TAG 0x07
 #define EXT_VIDEO_CAPABILITY_BLOCK 0x00
@@ -4309,6 +4310,48 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
 	mode->clock = clock;
 }
 
+static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db)
+{
+	if (cea_db_tag(db) != USE_EXTENDED_TAG)
+		return false;
+
+	if (db[1] != COLORIMETRY_DATA_BLOCK)
+		return false;
+
+	if (cea_db_payload_len(db) < 2)
+		return false;
+
+	return true;
+}
+
+static void
+drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
+{
+	struct drm_hdmi_info *info = &connector->display_info.hdmi;
+
+	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_601)
+		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_601;
+	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_709)
+		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_709;
+	if (db[2] & DRM_EDID_CLRMETRY_sYCC_601)
+		info->colorimetry |= DRM_EDID_CLRMETRY_sYCC_601;
+	if (db[2] & DRM_EDID_CLRMETRY_ADBYCC_601)
+		info->colorimetry |= DRM_EDID_CLRMETRY_ADBYCC_601;
+	if (db[2] & DRM_EDID_CLRMETRY_ADB_RGB)
+		info->colorimetry |= DRM_EDID_CLRMETRY_ADB_RGB;
+	if (db[2] & DRM_EDID_CLRMETRY_BT2020_CYCC)
+		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_CYCC;
+	if (db[2] & DRM_EDID_CLRMETRY_BT2020_YCC)
+		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_YCC;
+	if (db[2] & DRM_EDID_CLRMETRY_BT2020_RGB)
+		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_RGB;
+	/* Byte 4 Bit 7: DCI-P3 */
+	if (db[3] & BIT(7))
+		info->colorimetry |= DRM_EDID_CLRMETRY_DCI_P3;
+
+	DRM_DEBUG_KMS("Supported Colorimetry 0x%x\n", info->colorimetry);
+}
+
 static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db)
 {
 	if (cea_db_tag(db) != USE_EXTENDED_TAG)
@@ -4994,6 +5037,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
 			drm_parse_vcdb(connector, db);
 		if (cea_db_is_hdmi_hdr_metadata_block(db))
 			drm_parse_hdr_metadata_block(connector, db);
+		if (cea_db_is_hdmi_colorimetry_data_block(db))
+			drm_parse_colorimetry_data_block(connector, db);
 	}
 }
 
diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
index af145608b5ed..d599c3b9e881 100644
--- a/include/drm/drm_connector.h
+++ b/include/drm/drm_connector.h
@@ -207,6 +207,9 @@ struct drm_hdmi_info {
 
 	/** @y420_dc_modes: bitmap of deep color support index */
 	u8 y420_dc_modes;
+
+	/* @colorimetry: bitmap of supported colorimetry modes */
+	u16 colorimetry;
 };
 
 /**
diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
index cfa4f5af49af..98fa78c2f82d 100644
--- a/include/drm/drm_edid.h
+++ b/include/drm/drm_edid.h
@@ -229,6 +229,20 @@ struct detailed_timing {
 				    DRM_EDID_YCBCR420_DC_36 | \
 				    DRM_EDID_YCBCR420_DC_30)
 
+/*
+ * Supported Colorimetry from colorimetry data block
+ * as per CEA 861-G spec
+ */
+#define DRM_EDID_CLRMETRY_xvYCC_601   (1 << 0)
+#define DRM_EDID_CLRMETRY_xvYCC_709   (1 << 1)
+#define DRM_EDID_CLRMETRY_sYCC_601    (1 << 2)
+#define DRM_EDID_CLRMETRY_ADBYCC_601  (1 << 3)
+#define DRM_EDID_CLRMETRY_ADB_RGB     (1 << 4)
+#define DRM_EDID_CLRMETRY_BT2020_CYCC (1 << 5)
+#define DRM_EDID_CLRMETRY_BT2020_YCC  (1 << 6)
+#define DRM_EDID_CLRMETRY_BT2020_RGB  (1 << 7)
+#define DRM_EDID_CLRMETRY_DCI_P3      (1 << 15)
+
 /* ELD Header Block */
 #define DRM_ELD_HEADER_BLOCK_SIZE	4
 
-- 
2.25.1




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^ permalink raw reply related	[flat|nested] 8+ messages in thread
* Printing bitfields in the kernel (Re: [PATCH] drm: Parse Colorimetry data block from EDID)
  2020-08-26 14:23 [PATCH] drm: Parse Colorimetry data block from EDID Algea Cao
@ 2020-08-27  7:34 ` Pekka Paalanen
  2020-08-28  4:58   ` Joe Perches
  2020-08-27 10:57 ` [PATCH] drm: Parse Colorimetry data block from EDID Ville Syrjälä
  1 sibling, 1 reply; 8+ messages in thread
From: Pekka Paalanen @ 2020-08-27  7:34 UTC (permalink / raw)
  To: Algea Cao
  Cc: daniel, airlied, maarten.lankhorst, linux-kernel, dri-devel,
	linux-rockchip, mripard, tzimmermann


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On Wed, 26 Aug 2020 22:23:28 +0800
Algea Cao <algea.cao@rock-chips.com> wrote:

> CEA 861.3 spec adds colorimetry data block for HDMI.
> Parsing the block to get the colorimetry data from
> panel.
> 
> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> ---
> 
>  drivers/gpu/drm/drm_edid.c  | 45 +++++++++++++++++++++++++++++++++++++
>  include/drm/drm_connector.h |  3 +++
>  include/drm/drm_edid.h      | 14 ++++++++++++
>  3 files changed, 62 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 31496b6cfc56..67e607c04492 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3223,6 +3223,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
>  #define VIDEO_BLOCK     0x02
>  #define VENDOR_BLOCK    0x03
>  #define SPEAKER_BLOCK	0x04
> +#define COLORIMETRY_DATA_BLOCK		0x5
>  #define HDR_STATIC_METADATA_BLOCK	0x6
>  #define USE_EXTENDED_TAG 0x07
>  #define EXT_VIDEO_CAPABILITY_BLOCK 0x00
> @@ -4309,6 +4310,48 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
>  	mode->clock = clock;
>  }
>  
> +static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db)
> +{
> +	if (cea_db_tag(db) != USE_EXTENDED_TAG)
> +		return false;
> +
> +	if (db[1] != COLORIMETRY_DATA_BLOCK)
> +		return false;
> +
> +	if (cea_db_payload_len(db) < 2)
> +		return false;
> +
> +	return true;
> +}
> +
> +static void
> +drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
> +{
> +	struct drm_hdmi_info *info = &connector->display_info.hdmi;
> +
> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_601)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_601;
> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_709)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_709;
> +	if (db[2] & DRM_EDID_CLRMETRY_sYCC_601)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_sYCC_601;
> +	if (db[2] & DRM_EDID_CLRMETRY_ADBYCC_601)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADBYCC_601;
> +	if (db[2] & DRM_EDID_CLRMETRY_ADB_RGB)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADB_RGB;
> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_CYCC)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_CYCC;
> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_YCC)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_YCC;
> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_RGB)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_RGB;
> +	/* Byte 4 Bit 7: DCI-P3 */
> +	if (db[3] & BIT(7))
> +		info->colorimetry |= DRM_EDID_CLRMETRY_DCI_P3;
> +
> +	DRM_DEBUG_KMS("Supported Colorimetry 0x%x\n", info->colorimetry);

Hi,

taking a tangent here, printing bitfields as hex is hard to read. How
about using something like nvkm_snprintbf()? Of course not literally
that function since it's Nouveau internal, but as an end user I would be
happy to see DRM core or the kernel generics have similar functionality
that actually decodes the bits and prints their proper names.

Does such facility not exist yet?


Thanks,
pq

> +}
> +
>  static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db)
>  {
>  	if (cea_db_tag(db) != USE_EXTENDED_TAG)
> @@ -4994,6 +5037,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
>  			drm_parse_vcdb(connector, db);
>  		if (cea_db_is_hdmi_hdr_metadata_block(db))
>  			drm_parse_hdr_metadata_block(connector, db);
> +		if (cea_db_is_hdmi_colorimetry_data_block(db))
> +			drm_parse_colorimetry_data_block(connector, db);
>  	}
>  }
>  
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index af145608b5ed..d599c3b9e881 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -207,6 +207,9 @@ struct drm_hdmi_info {
>  
>  	/** @y420_dc_modes: bitmap of deep color support index */
>  	u8 y420_dc_modes;
> +
> +	/* @colorimetry: bitmap of supported colorimetry modes */
> +	u16 colorimetry;
>  };
>  
>  /**
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index cfa4f5af49af..98fa78c2f82d 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -229,6 +229,20 @@ struct detailed_timing {
>  				    DRM_EDID_YCBCR420_DC_36 | \
>  				    DRM_EDID_YCBCR420_DC_30)
>  
> +/*
> + * Supported Colorimetry from colorimetry data block
> + * as per CEA 861-G spec
> + */
> +#define DRM_EDID_CLRMETRY_xvYCC_601   (1 << 0)
> +#define DRM_EDID_CLRMETRY_xvYCC_709   (1 << 1)
> +#define DRM_EDID_CLRMETRY_sYCC_601    (1 << 2)
> +#define DRM_EDID_CLRMETRY_ADBYCC_601  (1 << 3)
> +#define DRM_EDID_CLRMETRY_ADB_RGB     (1 << 4)
> +#define DRM_EDID_CLRMETRY_BT2020_CYCC (1 << 5)
> +#define DRM_EDID_CLRMETRY_BT2020_YCC  (1 << 6)
> +#define DRM_EDID_CLRMETRY_BT2020_RGB  (1 << 7)
> +#define DRM_EDID_CLRMETRY_DCI_P3      (1 << 15)
> +
>  /* ELD Header Block */
>  #define DRM_ELD_HEADER_BLOCK_SIZE	4
>  


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^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] drm: Parse Colorimetry data block from EDID
  2020-08-26 14:23 [PATCH] drm: Parse Colorimetry data block from EDID Algea Cao
  2020-08-27  7:34 ` Printing bitfields in the kernel (Re: [PATCH] drm: Parse Colorimetry data block from EDID) Pekka Paalanen
@ 2020-08-27 10:57 ` Ville Syrjälä
  2020-08-28  1:07   ` crj
  1 sibling, 1 reply; 8+ messages in thread
From: Ville Syrjälä @ 2020-08-27 10:57 UTC (permalink / raw)
  To: Algea Cao
  Cc: daniel, airlied, maarten.lankhorst, linux-kernel, dri-devel,
	linux-rockchip, mripard, tzimmermann

On Wed, Aug 26, 2020 at 10:23:28PM +0800, Algea Cao wrote:
> CEA 861.3 spec adds colorimetry data block for HDMI.
> Parsing the block to get the colorimetry data from
> panel.

And what exactly do you want to do with that data?

> 
> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> ---
> 
>  drivers/gpu/drm/drm_edid.c  | 45 +++++++++++++++++++++++++++++++++++++
>  include/drm/drm_connector.h |  3 +++
>  include/drm/drm_edid.h      | 14 ++++++++++++
>  3 files changed, 62 insertions(+)
> 
> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> index 31496b6cfc56..67e607c04492 100644
> --- a/drivers/gpu/drm/drm_edid.c
> +++ b/drivers/gpu/drm/drm_edid.c
> @@ -3223,6 +3223,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
>  #define VIDEO_BLOCK     0x02
>  #define VENDOR_BLOCK    0x03
>  #define SPEAKER_BLOCK	0x04
> +#define COLORIMETRY_DATA_BLOCK		0x5
>  #define HDR_STATIC_METADATA_BLOCK	0x6
>  #define USE_EXTENDED_TAG 0x07
>  #define EXT_VIDEO_CAPABILITY_BLOCK 0x00
> @@ -4309,6 +4310,48 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
>  	mode->clock = clock;
>  }
>  
> +static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db)
> +{
> +	if (cea_db_tag(db) != USE_EXTENDED_TAG)
> +		return false;
> +
> +	if (db[1] != COLORIMETRY_DATA_BLOCK)
> +		return false;
> +
> +	if (cea_db_payload_len(db) < 2)
> +		return false;
> +
> +	return true;
> +}
> +
> +static void
> +drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
> +{
> +	struct drm_hdmi_info *info = &connector->display_info.hdmi;
> +
> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_601)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_601;
> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_709)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_709;
> +	if (db[2] & DRM_EDID_CLRMETRY_sYCC_601)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_sYCC_601;
> +	if (db[2] & DRM_EDID_CLRMETRY_ADBYCC_601)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADBYCC_601;
> +	if (db[2] & DRM_EDID_CLRMETRY_ADB_RGB)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADB_RGB;
> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_CYCC)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_CYCC;
> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_YCC)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_YCC;
> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_RGB)
> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_RGB;
> +	/* Byte 4 Bit 7: DCI-P3 */
> +	if (db[3] & BIT(7))
> +		info->colorimetry |= DRM_EDID_CLRMETRY_DCI_P3;
> +
> +	DRM_DEBUG_KMS("Supported Colorimetry 0x%x\n", info->colorimetry);
> +}
> +
>  static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db)
>  {
>  	if (cea_db_tag(db) != USE_EXTENDED_TAG)
> @@ -4994,6 +5037,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
>  			drm_parse_vcdb(connector, db);
>  		if (cea_db_is_hdmi_hdr_metadata_block(db))
>  			drm_parse_hdr_metadata_block(connector, db);
> +		if (cea_db_is_hdmi_colorimetry_data_block(db))
> +			drm_parse_colorimetry_data_block(connector, db);
>  	}
>  }
>  
> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> index af145608b5ed..d599c3b9e881 100644
> --- a/include/drm/drm_connector.h
> +++ b/include/drm/drm_connector.h
> @@ -207,6 +207,9 @@ struct drm_hdmi_info {
>  
>  	/** @y420_dc_modes: bitmap of deep color support index */
>  	u8 y420_dc_modes;
> +
> +	/* @colorimetry: bitmap of supported colorimetry modes */
> +	u16 colorimetry;
>  };
>  
>  /**
> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> index cfa4f5af49af..98fa78c2f82d 100644
> --- a/include/drm/drm_edid.h
> +++ b/include/drm/drm_edid.h
> @@ -229,6 +229,20 @@ struct detailed_timing {
>  				    DRM_EDID_YCBCR420_DC_36 | \
>  				    DRM_EDID_YCBCR420_DC_30)
>  
> +/*
> + * Supported Colorimetry from colorimetry data block
> + * as per CEA 861-G spec
> + */
> +#define DRM_EDID_CLRMETRY_xvYCC_601   (1 << 0)
> +#define DRM_EDID_CLRMETRY_xvYCC_709   (1 << 1)
> +#define DRM_EDID_CLRMETRY_sYCC_601    (1 << 2)
> +#define DRM_EDID_CLRMETRY_ADBYCC_601  (1 << 3)
> +#define DRM_EDID_CLRMETRY_ADB_RGB     (1 << 4)
> +#define DRM_EDID_CLRMETRY_BT2020_CYCC (1 << 5)
> +#define DRM_EDID_CLRMETRY_BT2020_YCC  (1 << 6)
> +#define DRM_EDID_CLRMETRY_BT2020_RGB  (1 << 7)
> +#define DRM_EDID_CLRMETRY_DCI_P3      (1 << 15)
> +
>  /* ELD Header Block */
>  #define DRM_ELD_HEADER_BLOCK_SIZE	4
>  
> -- 
> 2.25.1
> 
> 
> 
> _______________________________________________
> dri-devel mailing list
> dri-devel@lists.freedesktop.org
> https://lists.freedesktop.org/mailman/listinfo/dri-devel

-- 
Ville Syrjälä
Intel

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http://lists.infradead.org/mailman/listinfo/linux-rockchip

^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] drm: Parse Colorimetry data block from EDID
  2020-08-27 10:57 ` [PATCH] drm: Parse Colorimetry data block from EDID Ville Syrjälä
@ 2020-08-28  1:07   ` crj
  2020-08-31 19:53     ` Ville Syrjälä
  0 siblings, 1 reply; 8+ messages in thread
From: crj @ 2020-08-28  1:07 UTC (permalink / raw)
  To: Ville Syrjälä
  Cc: daniel, airlied, maarten.lankhorst, linux-kernel, dri-devel,
	linux-rockchip, mripard, tzimmermann

Hi Ville Syrjälä,

在 2020/8/27 18:57, Ville Syrjälä 写道:
> On Wed, Aug 26, 2020 at 10:23:28PM +0800, Algea Cao wrote:
>> CEA 861.3 spec adds colorimetry data block for HDMI.
>> Parsing the block to get the colorimetry data from
>> panel.
> And what exactly do you want to do with that data?


We can get colorimetry data block from edid then support

HDMI colorimetry such as BT2020.

>> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
>> ---
>>
>>   drivers/gpu/drm/drm_edid.c  | 45 +++++++++++++++++++++++++++++++++++++
>>   include/drm/drm_connector.h |  3 +++
>>   include/drm/drm_edid.h      | 14 ++++++++++++
>>   3 files changed, 62 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
>> index 31496b6cfc56..67e607c04492 100644
>> --- a/drivers/gpu/drm/drm_edid.c
>> +++ b/drivers/gpu/drm/drm_edid.c
>> @@ -3223,6 +3223,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
>>   #define VIDEO_BLOCK     0x02
>>   #define VENDOR_BLOCK    0x03
>>   #define SPEAKER_BLOCK	0x04
>> +#define COLORIMETRY_DATA_BLOCK		0x5
>>   #define HDR_STATIC_METADATA_BLOCK	0x6
>>   #define USE_EXTENDED_TAG 0x07
>>   #define EXT_VIDEO_CAPABILITY_BLOCK 0x00
>> @@ -4309,6 +4310,48 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
>>   	mode->clock = clock;
>>   }
>>   
>> +static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db)
>> +{
>> +	if (cea_db_tag(db) != USE_EXTENDED_TAG)
>> +		return false;
>> +
>> +	if (db[1] != COLORIMETRY_DATA_BLOCK)
>> +		return false;
>> +
>> +	if (cea_db_payload_len(db) < 2)
>> +		return false;
>> +
>> +	return true;
>> +}
>> +
>> +static void
>> +drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
>> +{
>> +	struct drm_hdmi_info *info = &connector->display_info.hdmi;
>> +
>> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_601)
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_601;
>> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_709)
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_709;
>> +	if (db[2] & DRM_EDID_CLRMETRY_sYCC_601)
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_sYCC_601;
>> +	if (db[2] & DRM_EDID_CLRMETRY_ADBYCC_601)
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADBYCC_601;
>> +	if (db[2] & DRM_EDID_CLRMETRY_ADB_RGB)
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADB_RGB;
>> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_CYCC)
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_CYCC;
>> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_YCC)
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_YCC;
>> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_RGB)
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_RGB;
>> +	/* Byte 4 Bit 7: DCI-P3 */
>> +	if (db[3] & BIT(7))
>> +		info->colorimetry |= DRM_EDID_CLRMETRY_DCI_P3;
>> +
>> +	DRM_DEBUG_KMS("Supported Colorimetry 0x%x\n", info->colorimetry);
>> +}
>> +
>>   static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db)
>>   {
>>   	if (cea_db_tag(db) != USE_EXTENDED_TAG)
>> @@ -4994,6 +5037,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
>>   			drm_parse_vcdb(connector, db);
>>   		if (cea_db_is_hdmi_hdr_metadata_block(db))
>>   			drm_parse_hdr_metadata_block(connector, db);
>> +		if (cea_db_is_hdmi_colorimetry_data_block(db))
>> +			drm_parse_colorimetry_data_block(connector, db);
>>   	}
>>   }
>>   
>> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
>> index af145608b5ed..d599c3b9e881 100644
>> --- a/include/drm/drm_connector.h
>> +++ b/include/drm/drm_connector.h
>> @@ -207,6 +207,9 @@ struct drm_hdmi_info {
>>   
>>   	/** @y420_dc_modes: bitmap of deep color support index */
>>   	u8 y420_dc_modes;
>> +
>> +	/* @colorimetry: bitmap of supported colorimetry modes */
>> +	u16 colorimetry;
>>   };
>>   
>>   /**
>> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
>> index cfa4f5af49af..98fa78c2f82d 100644
>> --- a/include/drm/drm_edid.h
>> +++ b/include/drm/drm_edid.h
>> @@ -229,6 +229,20 @@ struct detailed_timing {
>>   				    DRM_EDID_YCBCR420_DC_36 | \
>>   				    DRM_EDID_YCBCR420_DC_30)
>>   
>> +/*
>> + * Supported Colorimetry from colorimetry data block
>> + * as per CEA 861-G spec
>> + */
>> +#define DRM_EDID_CLRMETRY_xvYCC_601   (1 << 0)
>> +#define DRM_EDID_CLRMETRY_xvYCC_709   (1 << 1)
>> +#define DRM_EDID_CLRMETRY_sYCC_601    (1 << 2)
>> +#define DRM_EDID_CLRMETRY_ADBYCC_601  (1 << 3)
>> +#define DRM_EDID_CLRMETRY_ADB_RGB     (1 << 4)
>> +#define DRM_EDID_CLRMETRY_BT2020_CYCC (1 << 5)
>> +#define DRM_EDID_CLRMETRY_BT2020_YCC  (1 << 6)
>> +#define DRM_EDID_CLRMETRY_BT2020_RGB  (1 << 7)
>> +#define DRM_EDID_CLRMETRY_DCI_P3      (1 << 15)
>> +
>>   /* ELD Header Block */
>>   #define DRM_ELD_HEADER_BLOCK_SIZE	4
>>   
>> -- 
>> 2.25.1
>>
>>
>>
>> _______________________________________________
>> dri-devel mailing list
>> dri-devel@lists.freedesktop.org
>> https://lists.freedesktop.org/mailman/listinfo/dri-devel



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^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: Printing bitfields in the kernel (Re: [PATCH] drm: Parse Colorimetry data block from EDID)
  2020-08-27  7:34 ` Printing bitfields in the kernel (Re: [PATCH] drm: Parse Colorimetry data block from EDID) Pekka Paalanen
@ 2020-08-28  4:58   ` Joe Perches
  0 siblings, 0 replies; 8+ messages in thread
From: Joe Perches @ 2020-08-28  4:58 UTC (permalink / raw)
  To: Pekka Paalanen, Algea Cao
  Cc: daniel, airlied, maarten.lankhorst, linux-kernel, dri-devel,
	linux-rockchip, mripard, tzimmermann

On Thu, 2020-08-27 at 10:34 +0300, Pekka Paalanen wrote:
> On Wed, 26 Aug 2020 22:23:28 +0800
> Algea Cao <algea.cao@rock-chips.com> wrote:
> 
> > CEA 861.3 spec adds colorimetry data block for HDMI.
> > Parsing the block to get the colorimetry data from
> > panel.

If flags are int, I could imagine another %p<foo> extension
where %*p<foo> is used like:

	printk("flags: %*p<foo>n", flags, bitstrings)

where flags is:

	BIT(0)
	BIT(1)
	...
	BIT(last)

and

	char *bitstrings[] = {
		"bit 0 description",
		"bit 1 description",
		...
		"last bit description"
	};

Or define YA struct with 2 entries as the struct members
and use that.

struct foo {
	unsigned long flags,
	char ** descriptions,
};

	struct foo bar = {.flags = <flags> .descriptions = bitstrings};

	printk("flags: %p<foo>\n, &bar);



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^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] drm: Parse Colorimetry data block from EDID
  2020-08-28  1:07   ` crj
@ 2020-08-31 19:53     ` Ville Syrjälä
  2020-09-01  7:30       ` crj
  0 siblings, 1 reply; 8+ messages in thread
From: Ville Syrjälä @ 2020-08-31 19:53 UTC (permalink / raw)
  To: crj
  Cc: daniel, airlied, maarten.lankhorst, linux-kernel, dri-devel,
	linux-rockchip, mripard, tzimmermann

On Fri, Aug 28, 2020 at 09:07:13AM +0800, crj wrote:
> Hi Ville Syrjälä,
> 
> 在 2020/8/27 18:57, Ville Syrjälä 写道:
> > On Wed, Aug 26, 2020 at 10:23:28PM +0800, Algea Cao wrote:
> >> CEA 861.3 spec adds colorimetry data block for HDMI.
> >> Parsing the block to get the colorimetry data from
> >> panel.
> > And what exactly do you want to do with that data?
> 
> 
> We can get colorimetry data block from edid then support
> 
> HDMI colorimetry such as BT2020.

But what do you want to do with it? The patch does nothing
functional.

> 
> >> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> >> ---
> >>
> >>   drivers/gpu/drm/drm_edid.c  | 45 +++++++++++++++++++++++++++++++++++++
> >>   include/drm/drm_connector.h |  3 +++
> >>   include/drm/drm_edid.h      | 14 ++++++++++++
> >>   3 files changed, 62 insertions(+)
> >>
> >> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> >> index 31496b6cfc56..67e607c04492 100644
> >> --- a/drivers/gpu/drm/drm_edid.c
> >> +++ b/drivers/gpu/drm/drm_edid.c
> >> @@ -3223,6 +3223,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
> >>   #define VIDEO_BLOCK     0x02
> >>   #define VENDOR_BLOCK    0x03
> >>   #define SPEAKER_BLOCK	0x04
> >> +#define COLORIMETRY_DATA_BLOCK		0x5
> >>   #define HDR_STATIC_METADATA_BLOCK	0x6
> >>   #define USE_EXTENDED_TAG 0x07
> >>   #define EXT_VIDEO_CAPABILITY_BLOCK 0x00
> >> @@ -4309,6 +4310,48 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
> >>   	mode->clock = clock;
> >>   }
> >>   
> >> +static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db)
> >> +{
> >> +	if (cea_db_tag(db) != USE_EXTENDED_TAG)
> >> +		return false;
> >> +
> >> +	if (db[1] != COLORIMETRY_DATA_BLOCK)
> >> +		return false;
> >> +
> >> +	if (cea_db_payload_len(db) < 2)
> >> +		return false;
> >> +
> >> +	return true;
> >> +}
> >> +
> >> +static void
> >> +drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
> >> +{
> >> +	struct drm_hdmi_info *info = &connector->display_info.hdmi;
> >> +
> >> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_601)
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_601;
> >> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_709)
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_709;
> >> +	if (db[2] & DRM_EDID_CLRMETRY_sYCC_601)
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_sYCC_601;
> >> +	if (db[2] & DRM_EDID_CLRMETRY_ADBYCC_601)
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADBYCC_601;
> >> +	if (db[2] & DRM_EDID_CLRMETRY_ADB_RGB)
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADB_RGB;
> >> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_CYCC)
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_CYCC;
> >> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_YCC)
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_YCC;
> >> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_RGB)
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_RGB;
> >> +	/* Byte 4 Bit 7: DCI-P3 */
> >> +	if (db[3] & BIT(7))
> >> +		info->colorimetry |= DRM_EDID_CLRMETRY_DCI_P3;
> >> +
> >> +	DRM_DEBUG_KMS("Supported Colorimetry 0x%x\n", info->colorimetry);
> >> +}
> >> +
> >>   static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db)
> >>   {
> >>   	if (cea_db_tag(db) != USE_EXTENDED_TAG)
> >> @@ -4994,6 +5037,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
> >>   			drm_parse_vcdb(connector, db);
> >>   		if (cea_db_is_hdmi_hdr_metadata_block(db))
> >>   			drm_parse_hdr_metadata_block(connector, db);
> >> +		if (cea_db_is_hdmi_colorimetry_data_block(db))
> >> +			drm_parse_colorimetry_data_block(connector, db);
> >>   	}
> >>   }
> >>   
> >> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> >> index af145608b5ed..d599c3b9e881 100644
> >> --- a/include/drm/drm_connector.h
> >> +++ b/include/drm/drm_connector.h
> >> @@ -207,6 +207,9 @@ struct drm_hdmi_info {
> >>   
> >>   	/** @y420_dc_modes: bitmap of deep color support index */
> >>   	u8 y420_dc_modes;
> >> +
> >> +	/* @colorimetry: bitmap of supported colorimetry modes */
> >> +	u16 colorimetry;
> >>   };
> >>   
> >>   /**
> >> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> >> index cfa4f5af49af..98fa78c2f82d 100644
> >> --- a/include/drm/drm_edid.h
> >> +++ b/include/drm/drm_edid.h
> >> @@ -229,6 +229,20 @@ struct detailed_timing {
> >>   				    DRM_EDID_YCBCR420_DC_36 | \
> >>   				    DRM_EDID_YCBCR420_DC_30)
> >>   
> >> +/*
> >> + * Supported Colorimetry from colorimetry data block
> >> + * as per CEA 861-G spec
> >> + */
> >> +#define DRM_EDID_CLRMETRY_xvYCC_601   (1 << 0)
> >> +#define DRM_EDID_CLRMETRY_xvYCC_709   (1 << 1)
> >> +#define DRM_EDID_CLRMETRY_sYCC_601    (1 << 2)
> >> +#define DRM_EDID_CLRMETRY_ADBYCC_601  (1 << 3)
> >> +#define DRM_EDID_CLRMETRY_ADB_RGB     (1 << 4)
> >> +#define DRM_EDID_CLRMETRY_BT2020_CYCC (1 << 5)
> >> +#define DRM_EDID_CLRMETRY_BT2020_YCC  (1 << 6)
> >> +#define DRM_EDID_CLRMETRY_BT2020_RGB  (1 << 7)
> >> +#define DRM_EDID_CLRMETRY_DCI_P3      (1 << 15)
> >> +
> >>   /* ELD Header Block */
> >>   #define DRM_ELD_HEADER_BLOCK_SIZE	4
> >>   
> >> -- 
> >> 2.25.1
> >>
> >>
> >>
> >> _______________________________________________
> >> dri-devel mailing list
> >> dri-devel@lists.freedesktop.org
> >> https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 

-- 
Ville Syrjälä
Intel

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^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] drm: Parse Colorimetry data block from EDID
  2020-08-31 19:53     ` Ville Syrjälä
@ 2020-09-01  7:30       ` crj
  2020-09-01 13:17         ` Daniel Vetter
  0 siblings, 1 reply; 8+ messages in thread
From: crj @ 2020-09-01  7:30 UTC (permalink / raw)
  To: Ville Syrjälä
  Cc: daniel, airlied, maarten.lankhorst, linux-kernel, dri-devel,
	linux-rockchip, mripard, tzimmermann

Hi,

在 2020/9/1 3:53, Ville Syrjälä 写道:
> On Fri, Aug 28, 2020 at 09:07:13AM +0800, crj wrote:
>> Hi Ville Syrjälä,
>>
>> 在 2020/8/27 18:57, Ville Syrjälä 写道:
>>> On Wed, Aug 26, 2020 at 10:23:28PM +0800, Algea Cao wrote:
>>>> CEA 861.3 spec adds colorimetry data block for HDMI.
>>>> Parsing the block to get the colorimetry data from
>>>> panel.
>>> And what exactly do you want to do with that data?
>>
>> We can get colorimetry data block from edid then support
>>
>> HDMI colorimetry such as BT2020.
> But what do you want to do with it? The patch does nothing
> functional.

If we want to output BT2020 in HDMI driver, we can know whether TV 
support BT2020

via connector->display_info.hdmi.colorimetry. If TV don't support 
BT2020, HDMI shouldn't

ouput in BT2020.

>>>> Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
>>>> ---
>>>>
>>>>    drivers/gpu/drm/drm_edid.c  | 45 +++++++++++++++++++++++++++++++++++++
>>>>    include/drm/drm_connector.h |  3 +++
>>>>    include/drm/drm_edid.h      | 14 ++++++++++++
>>>>    3 files changed, 62 insertions(+)
>>>>
>>>> diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
>>>> index 31496b6cfc56..67e607c04492 100644
>>>> --- a/drivers/gpu/drm/drm_edid.c
>>>> +++ b/drivers/gpu/drm/drm_edid.c
>>>> @@ -3223,6 +3223,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
>>>>    #define VIDEO_BLOCK     0x02
>>>>    #define VENDOR_BLOCK    0x03
>>>>    #define SPEAKER_BLOCK	0x04
>>>> +#define COLORIMETRY_DATA_BLOCK		0x5
>>>>    #define HDR_STATIC_METADATA_BLOCK	0x6
>>>>    #define USE_EXTENDED_TAG 0x07
>>>>    #define EXT_VIDEO_CAPABILITY_BLOCK 0x00
>>>> @@ -4309,6 +4310,48 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
>>>>    	mode->clock = clock;
>>>>    }
>>>>    
>>>> +static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db)
>>>> +{
>>>> +	if (cea_db_tag(db) != USE_EXTENDED_TAG)
>>>> +		return false;
>>>> +
>>>> +	if (db[1] != COLORIMETRY_DATA_BLOCK)
>>>> +		return false;
>>>> +
>>>> +	if (cea_db_payload_len(db) < 2)
>>>> +		return false;
>>>> +
>>>> +	return true;
>>>> +}
>>>> +
>>>> +static void
>>>> +drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
>>>> +{
>>>> +	struct drm_hdmi_info *info = &connector->display_info.hdmi;
>>>> +
>>>> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_601)
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_601;
>>>> +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_709)
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_709;
>>>> +	if (db[2] & DRM_EDID_CLRMETRY_sYCC_601)
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_sYCC_601;
>>>> +	if (db[2] & DRM_EDID_CLRMETRY_ADBYCC_601)
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADBYCC_601;
>>>> +	if (db[2] & DRM_EDID_CLRMETRY_ADB_RGB)
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_ADB_RGB;
>>>> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_CYCC)
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_CYCC;
>>>> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_YCC)
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_YCC;
>>>> +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_RGB)
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_RGB;
>>>> +	/* Byte 4 Bit 7: DCI-P3 */
>>>> +	if (db[3] & BIT(7))
>>>> +		info->colorimetry |= DRM_EDID_CLRMETRY_DCI_P3;
>>>> +
>>>> +	DRM_DEBUG_KMS("Supported Colorimetry 0x%x\n", info->colorimetry);
>>>> +}
>>>> +
>>>>    static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db)
>>>>    {
>>>>    	if (cea_db_tag(db) != USE_EXTENDED_TAG)
>>>> @@ -4994,6 +5037,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
>>>>    			drm_parse_vcdb(connector, db);
>>>>    		if (cea_db_is_hdmi_hdr_metadata_block(db))
>>>>    			drm_parse_hdr_metadata_block(connector, db);
>>>> +		if (cea_db_is_hdmi_colorimetry_data_block(db))
>>>> +			drm_parse_colorimetry_data_block(connector, db);
>>>>    	}
>>>>    }
>>>>    
>>>> diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
>>>> index af145608b5ed..d599c3b9e881 100644
>>>> --- a/include/drm/drm_connector.h
>>>> +++ b/include/drm/drm_connector.h
>>>> @@ -207,6 +207,9 @@ struct drm_hdmi_info {
>>>>    
>>>>    	/** @y420_dc_modes: bitmap of deep color support index */
>>>>    	u8 y420_dc_modes;
>>>> +
>>>> +	/* @colorimetry: bitmap of supported colorimetry modes */
>>>> +	u16 colorimetry;
>>>>    };
>>>>    
>>>>    /**
>>>> diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
>>>> index cfa4f5af49af..98fa78c2f82d 100644
>>>> --- a/include/drm/drm_edid.h
>>>> +++ b/include/drm/drm_edid.h
>>>> @@ -229,6 +229,20 @@ struct detailed_timing {
>>>>    				    DRM_EDID_YCBCR420_DC_36 | \
>>>>    				    DRM_EDID_YCBCR420_DC_30)
>>>>    
>>>> +/*
>>>> + * Supported Colorimetry from colorimetry data block
>>>> + * as per CEA 861-G spec
>>>> + */
>>>> +#define DRM_EDID_CLRMETRY_xvYCC_601   (1 << 0)
>>>> +#define DRM_EDID_CLRMETRY_xvYCC_709   (1 << 1)
>>>> +#define DRM_EDID_CLRMETRY_sYCC_601    (1 << 2)
>>>> +#define DRM_EDID_CLRMETRY_ADBYCC_601  (1 << 3)
>>>> +#define DRM_EDID_CLRMETRY_ADB_RGB     (1 << 4)
>>>> +#define DRM_EDID_CLRMETRY_BT2020_CYCC (1 << 5)
>>>> +#define DRM_EDID_CLRMETRY_BT2020_YCC  (1 << 6)
>>>> +#define DRM_EDID_CLRMETRY_BT2020_RGB  (1 << 7)
>>>> +#define DRM_EDID_CLRMETRY_DCI_P3      (1 << 15)
>>>> +
>>>>    /* ELD Header Block */
>>>>    #define DRM_ELD_HEADER_BLOCK_SIZE	4
>>>>    
>>>> -- 
>>>> 2.25.1
>>>>
>>>>
>>>>
>>>> _______________________________________________
>>>> dri-devel mailing list
>>>> dri-devel@lists.freedesktop.org
>>>> https://lists.freedesktop.org/mailman/listinfo/dri-devel



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^ permalink raw reply	[flat|nested] 8+ messages in thread
* Re: [PATCH] drm: Parse Colorimetry data block from EDID
  2020-09-01  7:30       ` crj
@ 2020-09-01 13:17         ` Daniel Vetter
  0 siblings, 0 replies; 8+ messages in thread
From: Daniel Vetter @ 2020-09-01 13:17 UTC (permalink / raw)
  To: crj
  Cc: daniel, airlied, maarten.lankhorst, linux-kernel, dri-devel,
	linux-rockchip, mripard, tzimmermann, Ville Syrjälä

On Tue, Sep 01, 2020 at 03:30:17PM +0800, crj wrote:
> Hi,
> 
> 在 2020/9/1 3:53, Ville Syrjälä 写道:
> > On Fri, Aug 28, 2020 at 09:07:13AM +0800, crj wrote:
> > > Hi Ville Syrjälä,
> > > 
> > > 在 2020/8/27 18:57, Ville Syrjälä 写道:
> > > > On Wed, Aug 26, 2020 at 10:23:28PM +0800, Algea Cao wrote:
> > > > > CEA 861.3 spec adds colorimetry data block for HDMI.
> > > > > Parsing the block to get the colorimetry data from
> > > > > panel.
> > > > And what exactly do you want to do with that data?
> > > 
> > > We can get colorimetry data block from edid then support
> > > 
> > > HDMI colorimetry such as BT2020.
> > But what do you want to do with it? The patch does nothing
> > functional.
> 
> If we want to output BT2020 in HDMI driver, we can know whether TV support
> BT2020
> 
> via connector->display_info.hdmi.colorimetry. If TV don't support BT2020,
> HDMI shouldn't
> 
> ouput in BT2020.

You need to include these driver patches in your series, not just the core
changes. We don't review/merge just core enabling patches, we need an
entire functional slice.
-Daniel

> 
> > > > > Signed-off-by: Algea Cao <algea.cao@rock-chips.com>
> > > > > ---
> > > > > 
> > > > >    drivers/gpu/drm/drm_edid.c  | 45 +++++++++++++++++++++++++++++++++++++
> > > > >    include/drm/drm_connector.h |  3 +++
> > > > >    include/drm/drm_edid.h      | 14 ++++++++++++
> > > > >    3 files changed, 62 insertions(+)
> > > > > 
> > > > > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c
> > > > > index 31496b6cfc56..67e607c04492 100644
> > > > > --- a/drivers/gpu/drm/drm_edid.c
> > > > > +++ b/drivers/gpu/drm/drm_edid.c
> > > > > @@ -3223,6 +3223,7 @@ add_detailed_modes(struct drm_connector *connector, struct edid *edid,
> > > > >    #define VIDEO_BLOCK     0x02
> > > > >    #define VENDOR_BLOCK    0x03
> > > > >    #define SPEAKER_BLOCK	0x04
> > > > > +#define COLORIMETRY_DATA_BLOCK		0x5
> > > > >    #define HDR_STATIC_METADATA_BLOCK	0x6
> > > > >    #define USE_EXTENDED_TAG 0x07
> > > > >    #define EXT_VIDEO_CAPABILITY_BLOCK 0x00
> > > > > @@ -4309,6 +4310,48 @@ static void fixup_detailed_cea_mode_clock(struct drm_display_mode *mode)
> > > > >    	mode->clock = clock;
> > > > >    }
> > > > > +static bool cea_db_is_hdmi_colorimetry_data_block(const u8 *db)
> > > > > +{
> > > > > +	if (cea_db_tag(db) != USE_EXTENDED_TAG)
> > > > > +		return false;
> > > > > +
> > > > > +	if (db[1] != COLORIMETRY_DATA_BLOCK)
> > > > > +		return false;
> > > > > +
> > > > > +	if (cea_db_payload_len(db) < 2)
> > > > > +		return false;
> > > > > +
> > > > > +	return true;
> > > > > +}
> > > > > +
> > > > > +static void
> > > > > +drm_parse_colorimetry_data_block(struct drm_connector *connector, const u8 *db)
> > > > > +{
> > > > > +	struct drm_hdmi_info *info = &connector->display_info.hdmi;
> > > > > +
> > > > > +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_601)
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_601;
> > > > > +	if (db[2] & DRM_EDID_CLRMETRY_xvYCC_709)
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_xvYCC_709;
> > > > > +	if (db[2] & DRM_EDID_CLRMETRY_sYCC_601)
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_sYCC_601;
> > > > > +	if (db[2] & DRM_EDID_CLRMETRY_ADBYCC_601)
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_ADBYCC_601;
> > > > > +	if (db[2] & DRM_EDID_CLRMETRY_ADB_RGB)
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_ADB_RGB;
> > > > > +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_CYCC)
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_CYCC;
> > > > > +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_YCC)
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_YCC;
> > > > > +	if (db[2] & DRM_EDID_CLRMETRY_BT2020_RGB)
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_BT2020_RGB;
> > > > > +	/* Byte 4 Bit 7: DCI-P3 */
> > > > > +	if (db[3] & BIT(7))
> > > > > +		info->colorimetry |= DRM_EDID_CLRMETRY_DCI_P3;
> > > > > +
> > > > > +	DRM_DEBUG_KMS("Supported Colorimetry 0x%x\n", info->colorimetry);
> > > > > +}
> > > > > +
> > > > >    static bool cea_db_is_hdmi_hdr_metadata_block(const u8 *db)
> > > > >    {
> > > > >    	if (cea_db_tag(db) != USE_EXTENDED_TAG)
> > > > > @@ -4994,6 +5037,8 @@ static void drm_parse_cea_ext(struct drm_connector *connector,
> > > > >    			drm_parse_vcdb(connector, db);
> > > > >    		if (cea_db_is_hdmi_hdr_metadata_block(db))
> > > > >    			drm_parse_hdr_metadata_block(connector, db);
> > > > > +		if (cea_db_is_hdmi_colorimetry_data_block(db))
> > > > > +			drm_parse_colorimetry_data_block(connector, db);
> > > > >    	}
> > > > >    }
> > > > > diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h
> > > > > index af145608b5ed..d599c3b9e881 100644
> > > > > --- a/include/drm/drm_connector.h
> > > > > +++ b/include/drm/drm_connector.h
> > > > > @@ -207,6 +207,9 @@ struct drm_hdmi_info {
> > > > >    	/** @y420_dc_modes: bitmap of deep color support index */
> > > > >    	u8 y420_dc_modes;
> > > > > +
> > > > > +	/* @colorimetry: bitmap of supported colorimetry modes */
> > > > > +	u16 colorimetry;
> > > > >    };
> > > > >    /**
> > > > > diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h
> > > > > index cfa4f5af49af..98fa78c2f82d 100644
> > > > > --- a/include/drm/drm_edid.h
> > > > > +++ b/include/drm/drm_edid.h
> > > > > @@ -229,6 +229,20 @@ struct detailed_timing {
> > > > >    				    DRM_EDID_YCBCR420_DC_36 | \
> > > > >    				    DRM_EDID_YCBCR420_DC_30)
> > > > > +/*
> > > > > + * Supported Colorimetry from colorimetry data block
> > > > > + * as per CEA 861-G spec
> > > > > + */
> > > > > +#define DRM_EDID_CLRMETRY_xvYCC_601   (1 << 0)
> > > > > +#define DRM_EDID_CLRMETRY_xvYCC_709   (1 << 1)
> > > > > +#define DRM_EDID_CLRMETRY_sYCC_601    (1 << 2)
> > > > > +#define DRM_EDID_CLRMETRY_ADBYCC_601  (1 << 3)
> > > > > +#define DRM_EDID_CLRMETRY_ADB_RGB     (1 << 4)
> > > > > +#define DRM_EDID_CLRMETRY_BT2020_CYCC (1 << 5)
> > > > > +#define DRM_EDID_CLRMETRY_BT2020_YCC  (1 << 6)
> > > > > +#define DRM_EDID_CLRMETRY_BT2020_RGB  (1 << 7)
> > > > > +#define DRM_EDID_CLRMETRY_DCI_P3      (1 << 15)
> > > > > +
> > > > >    /* ELD Header Block */
> > > > >    #define DRM_ELD_HEADER_BLOCK_SIZE	4
> > > > > -- 
> > > > > 2.25.1
> > > > > 
> > > > > 
> > > > > 
> > > > > _______________________________________________
> > > > > dri-devel mailing list
> > > > > dri-devel@lists.freedesktop.org
> > > > > https://lists.freedesktop.org/mailman/listinfo/dri-devel
> 
> 

-- 
Daniel Vetter
Software Engineer, Intel Corporation
http://blog.ffwll.ch

_______________________________________________
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Linux-rockchip@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-rockchip

^ permalink raw reply	[flat|nested] 8+ messages in thread
end of thread, other threads:[~2020-09-01 13:17 UTC | newest]

Thread overview: 8+ messages (download: mbox.gz / follow: Atom feed)
-- links below jump to the message on this page --
2020-08-26 14:23 [PATCH] drm: Parse Colorimetry data block from EDID Algea Cao
2020-08-27  7:34 ` Printing bitfields in the kernel (Re: [PATCH] drm: Parse Colorimetry data block from EDID) Pekka Paalanen
2020-08-28  4:58   ` Joe Perches
2020-08-27 10:57 ` [PATCH] drm: Parse Colorimetry data block from EDID Ville Syrjälä
2020-08-28  1:07   ` crj
2020-08-31 19:53     ` Ville Syrjälä
2020-09-01  7:30       ` crj
2020-09-01 13:17         ` Daniel Vetter

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