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drm/bridge: adv7511: provide SPD and HDMI infoframes

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ADV75xx hardware supports sending SPD InfoFrame over the HDMI link. Also
it provides support for two generic (Spare) InfoFrames. Use those
capabilities to be able to send SPD and HDMI Vendor-Specific Infoframes.

Reviewed-by: Maxime Ripard <mripard@kernel.org>
Link: https://lore.kernel.org/r/20250827-adv7511-infoframes-v1-1-f89b9690f89c@oss.qualcomm.com
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
This commit is contained in:
Dmitry Baryshkov
2025-08-27 16:29:04 +03:00
parent b7243862f8
commit f4028ef65d
2 changed files with 34 additions and 2 deletions
Download Patch File Download Diff File Expand all files Collapse all files

6
drivers/gpu/drm/bridge/adv7511/adv7511.h
View File

@@ -195,13 +195,14 @@
#define ADV7511_I2S_IEC958_DIRECT 3
#define ADV7511_PACKET(p, x) ((p) * 0x20 + (x))
#define ADV7511_PACKET_SDP(x) ADV7511_PACKET(0, x)
#define ADV7511_PACKET_SPD(x) ADV7511_PACKET(0, x)
#define ADV7511_PACKET_MPEG(x) ADV7511_PACKET(1, x)
#define ADV7511_PACKET_ACP(x) ADV7511_PACKET(2, x)
#define ADV7511_PACKET_ISRC1(x) ADV7511_PACKET(3, x)
#define ADV7511_PACKET_ISRC2(x) ADV7511_PACKET(4, x)
#define ADV7511_PACKET_GM(x) ADV7511_PACKET(5, x)
#define ADV7511_PACKET_SPARE(x) ADV7511_PACKET(6, x)
#define ADV7511_PACKET_SPARE1(x) ADV7511_PACKET(6, x)
#define ADV7511_PACKET_SPARE2(x) ADV7511_PACKET(7, x)
#define ADV7511_REG_CEC_TX_FRAME_HDR 0x00
#define ADV7511_REG_CEC_TX_FRAME_DATA0 0x01
@@ -348,6 +349,7 @@ struct adv7511 {
struct i2c_client *i2c_cec;
struct regmap *regmap;
struct regmap *regmap_packet;
struct regmap *regmap_cec;
enum drm_connector_status status;
bool powered;

30
drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
View File

@@ -132,6 +132,13 @@ static const struct regmap_config adv7511_regmap_config = {
.volatile_reg = adv7511_register_volatile,
};
static const struct regmap_config adv7511_packet_config = {
.reg_bits = 8,
.val_bits = 8,
.max_register = 0xff,
};
/* -----------------------------------------------------------------------------
* Hardware configuration
*/
@@ -889,6 +896,12 @@ static int adv7511_bridge_hdmi_clear_infoframe(struct drm_bridge *bridge,
case HDMI_INFOFRAME_TYPE_AVI:
adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
break;
case HDMI_INFOFRAME_TYPE_SPD:
adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_SPD);
break;
case HDMI_INFOFRAME_TYPE_VENDOR:
adv7511_packet_disable(adv7511, ADV7511_PACKET_ENABLE_SPARE1);
break;
default:
drm_dbg_driver(adv7511->bridge.dev, "Unsupported HDMI InfoFrame %x\n", type);
break;
@@ -913,6 +926,16 @@ static int adv7511_bridge_hdmi_write_infoframe(struct drm_bridge *bridge,
adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_AVI_INFOFRAME);
break;
case HDMI_INFOFRAME_TYPE_SPD:
regmap_bulk_write(adv7511->regmap_packet, ADV7511_PACKET_SPD(0),
buffer, len);
adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_SPD);
break;
case HDMI_INFOFRAME_TYPE_VENDOR:
regmap_bulk_write(adv7511->regmap_packet, ADV7511_PACKET_SPARE1(0),
buffer, len);
adv7511_packet_enable(adv7511, ADV7511_PACKET_ENABLE_SPARE1);
break;
default:
drm_dbg_driver(adv7511->bridge.dev, "Unsupported HDMI InfoFrame %x\n", type);
break;
@@ -1242,6 +1265,13 @@ static int adv7511_probe(struct i2c_client *i2c)
goto err_i2c_unregister_edid;
}
adv7511->regmap_packet = devm_regmap_init_i2c(adv7511->i2c_packet,
&adv7511_packet_config);
if (IS_ERR(adv7511->regmap_packet)) {
ret = PTR_ERR(adv7511->regmap_packet);
goto err_i2c_unregister_packet;
}
regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR,
adv7511->i2c_packet->addr << 1);