Commit f50b969b authored by Liu Ying's avatar Liu Ying Committed by Dmitry Baryshkov
Browse files

drm/bridge: ite-it6263: Support HDMI vendor specific infoframe 



IT6263 supports HDMI vendor specific infoframe.  The infoframe header
and payload are configurable via NULL packet registers.  The infoframe
is enabled and disabled via PKT_NULL_CTRL register.  Add the HDMI vendor
specific infoframe support.

Signed-off-by: default avatarLiu Ying <victor.liu@nxp.com>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Link: https://lore.kernel.org/r/20250908-it6263-vendor-specific-infoframe-v2-1-3f2ebd9135ad@nxp.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
parent f0e7f358

drivers/gpu/drm/bridge/ite-it6263.c

+44 −20
Original line number Diff line number Diff line
@@ -146,6 +146,7 @@ 
#define  HDMI_COLOR_DEPTH_24		FIELD_PREP(HDMI_COLOR_DEPTH, 4)



#define HDMI_REG_PKT_GENERAL_CTRL	0xc6

#define HDMI_REG_PKT_NULL_CTRL		0xc9

#define HDMI_REG_AVI_INFOFRM_CTRL	0xcd

#define  ENABLE_PKT			BIT(0)

#define  REPEAT_PKT			BIT(1)
@@ -154,6 +155,12 @@ 
 * 3) HDMI register bank1: 0x130 ~ 0x1ff (HDMI packet registers)

 */



/* NULL packet registers */

/* Header Byte(HB): n = 0 ~ 2 */

#define HDMI_REG_PKT_HB(n)		(0x138 + (n))

/* Packet Byte(PB): n = 0 ~ 27(HDMI_MAX_INFOFRAME_SIZE), n = 0 for checksum */

#define HDMI_REG_PKT_PB(n)		(0x13b + (n))



/* AVI packet registers */

#define HDMI_REG_AVI_DB1		0x158

#define HDMI_REG_AVI_DB2		0x159
@@ -224,7 +231,9 @@ static bool it6263_hdmi_writeable_reg(struct device *dev, unsigned int reg) 
	case HDMI_REG_HDMI_MODE:

	case HDMI_REG_GCP:

	case HDMI_REG_PKT_GENERAL_CTRL:

	case HDMI_REG_PKT_NULL_CTRL:

	case HDMI_REG_AVI_INFOFRM_CTRL:

	case HDMI_REG_PKT_HB(0) ... HDMI_REG_PKT_PB(HDMI_MAX_INFOFRAME_SIZE):

	case HDMI_REG_AVI_DB1:

	case HDMI_REG_AVI_DB2:

	case HDMI_REG_AVI_DB3:
@@ -755,10 +764,16 @@ static int it6263_hdmi_clear_infoframe(struct drm_bridge *bridge, 
{

	struct it6263 *it = bridge_to_it6263(bridge);



	if (type == HDMI_INFOFRAME_TYPE_AVI)

	switch (type) {

	case HDMI_INFOFRAME_TYPE_AVI:

		regmap_write(it->hdmi_regmap, HDMI_REG_AVI_INFOFRM_CTRL, 0);

	else

		break;

	case HDMI_INFOFRAME_TYPE_VENDOR:

		regmap_write(it->hdmi_regmap, HDMI_REG_PKT_NULL_CTRL, 0);

		break;

	default:

		dev_dbg(it->dev, "unsupported HDMI infoframe 0x%x\n", type);

	}



	return 0;

}
@@ -770,11 +785,8 @@ static int it6263_hdmi_write_infoframe(struct drm_bridge *bridge, 
	struct it6263 *it = bridge_to_it6263(bridge);

	struct regmap *regmap = it->hdmi_regmap;



	if (type != HDMI_INFOFRAME_TYPE_AVI) {

		dev_dbg(it->dev, "unsupported HDMI infoframe 0x%x\n", type);

		return 0;

	}



	switch (type) {

	case HDMI_INFOFRAME_TYPE_AVI:

		/* write the first AVI infoframe data byte chunk(DB1-DB5) */

		regmap_bulk_write(regmap, HDMI_REG_AVI_DB1,

				  &buffer[HDMI_INFOFRAME_HEADER_SIZE],
@@ -789,7 +801,19 @@ static int it6263_hdmi_write_infoframe(struct drm_bridge *bridge, 
		/* write checksum */

		regmap_write(regmap, HDMI_REG_AVI_CSUM, buffer[3]);



	regmap_write(regmap, HDMI_REG_AVI_INFOFRM_CTRL, ENABLE_PKT | REPEAT_PKT);

		regmap_write(regmap, HDMI_REG_AVI_INFOFRM_CTRL,

			     ENABLE_PKT | REPEAT_PKT);

		break;

	case HDMI_INFOFRAME_TYPE_VENDOR:

		/* write header and payload */

		regmap_bulk_write(regmap, HDMI_REG_PKT_HB(0), buffer, len);



		regmap_write(regmap, HDMI_REG_PKT_NULL_CTRL,

			     ENABLE_PKT | REPEAT_PKT);

		break;

	default:

		dev_dbg(it->dev, "unsupported HDMI infoframe 0x%x\n", type);

	}



	return 0;

}