[PATCH 2/2] drm: anx7625: add I2S input stream right justified control

[Xin Ji]

The default audio data stream is left justify. When the
property "analogix,audio-right-justify-enable" is detected,
the code enables right justify.

Signed-off-by: Xin Ji <xji@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/bridge/analogix/anx7625.c | 9 +++++++++
 drivers/gpu/drm/bridge/analogix/anx7625.h | 3 +++
 2 files changed, 12 insertions(+)

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index c3af88e14f8b..f4bce0000676 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -1883,6 +1883,9 @@ static int anx7625_parse_dt(struct device *dev,
 	if (of_property_read_bool(np, "analogix,audio-enable"))
 		pdata->audio_en = 1;
 
+	if (of_property_read_bool(np, "analogix,audio-right-justify-enable"))
+		pdata->audio_right_justify = 1;
+
 	return 0;
 }
 
@@ -2083,6 +2086,12 @@ static int anx7625_audio_hw_params(struct device *dev, void *data,
 		ret |= anx7625_write_and(ctx, ctx->i2c.tx_p2_client,
 				AUDIO_CHANNEL_STATUS_6, ~AUDIO_LAYOUT);
 
+	/* Right justified */
+	if (ctx->pdata.audio_right_justify)
+		ret |= anx7625_write_or(ctx, ctx->i2c.tx_p2_client,
+					AUDIO_CONTROL_REGISTER,
+					RIGHT_JUSTIFY_CTRL);
+
 	/* FS */
 	switch (params->sample_rate) {
 	case 32000:
diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.h b/drivers/gpu/drm/bridge/analogix/anx7625.h
index 957d234ec07c..9dd9970d2172 100644
--- a/drivers/gpu/drm/bridge/analogix/anx7625.h
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.h
@@ -154,6 +154,8 @@
 #define HPD_TIME               54000
 
 #define AUDIO_CONTROL_REGISTER 0xe6
+#define RIGHT_JUSTIFY_CTRL     BIT(0)
+
 #define TDM_TIMING_MODE 0x08
 
 #define I2C_ADDR_72_DPTX              0x72
@@ -444,6 +446,7 @@ struct anx7625_platform_data {
 	int is_dpi;
 	int mipi_lanes;
 	int audio_en;
+	int audio_right_justify;
 	int dp_lane0_swing_reg_cnt;
 	u8 lane0_reg_data[DP_TX_SWING_REG_CNT];
 	int dp_lane1_swing_reg_cnt;
-- 
2.25.1