drm/bridge: anx7625: Support HDMI_I2S audio format

1. Support HDMI_I2S audio format.
2. Return 0 if there is no sink connection in .hw_param callback.

Signed-off-by: Xin Ji <xji@analogixsemi.com>
Acked-by: Hsin-Yi Wang <hsinyi@chromium.org>
Acked-by: Jiaxin Yu<jiaxin.yu@mediatek.com>
Signed-off-by: Robert Foss <robert.foss@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20220726033058.403715-1-xji@analogixsemi.com

diff --git a/drivers/gpu/drm/bridge/analogix/anx7625.c b/drivers/gpu/drm/bridge/analogix/anx7625.c
index 79fc7a5..c74b5df 100644 (file)
--- a/drivers/gpu/drm/bridge/analogix/anx7625.c
+++ b/drivers/gpu/drm/bridge/analogix/anx7625.c
@@ -1797,8 +1797,13 @@ static int anx7625_audio_hw_params(struct device *dev, void *data,
        int wl, ch, rate;
        int ret = 0;
 
-       if (fmt->fmt != HDMI_DSP_A) {
-               DRM_DEV_ERROR(dev, "only supports DSP_A\n");
+       if (anx7625_sink_detect(ctx) == connector_status_disconnected) {
+               DRM_DEV_DEBUG_DRIVER(dev, "DP not connected\n");
+               return 0;
+       }
+
+       if (fmt->fmt != HDMI_DSP_A && fmt->fmt != HDMI_I2S) {
+               DRM_DEV_ERROR(dev, "only supports DSP_A & I2S\n");
                return -EINVAL;
        }
 
@@ -1806,10 +1811,16 @@ static int anx7625_audio_hw_params(struct device *dev, void *data,
                             params->sample_rate, params->sample_width,
                             params->cea.channels);
 
-       ret |= anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
-                                   AUDIO_CHANNEL_STATUS_6,
-                                   ~I2S_SLAVE_MODE,
-                                   TDM_SLAVE_MODE);
+       if (fmt->fmt == HDMI_DSP_A)
+               ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+                                          AUDIO_CHANNEL_STATUS_6,
+                                          ~I2S_SLAVE_MODE,
+                                          TDM_SLAVE_MODE);
+       else
+               ret = anx7625_write_and_or(ctx, ctx->i2c.tx_p2_client,
+                                          AUDIO_CHANNEL_STATUS_6,
+                                          ~TDM_SLAVE_MODE,
+                                          I2S_SLAVE_MODE);
 
        /* Word length */
        switch (params->sample_width) {