drm: bridge: dw-hdmi-i2s-audio: enable INSERT_PCUV bit for LPCM

[firefly-linux-kernel-4.4.55.git] / drivers / gpu / drm / bridge / dw-hdmi-i2s-audio.c

diff --git a/drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c
index 74ae2c25b4e5e0766b5d5e134a23e42695b6b086..84c2a316aac395ebe942735fddf1dbb25ccfc15b 100644 (file)
--- a/drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c
+++ b/drivers/gpu/drm/bridge/dw-hdmi-i2s-audio.c
@@ -85,7 +85,14 @@ static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
        hdmi_write(audio, inputclkfs, HDMI_AUD_INPUTCLKFS);
        hdmi_write(audio, conf0, HDMI_AUD_CONF0);
        hdmi_write(audio, conf1, HDMI_AUD_CONF1);
-
+       /*
+        * dw-hdmi introduced insert_pcuv bit in version 2.10a.
+        * When set (1'b1), this bit enables the insertion of the PCUV
+        * (Parity, Channel Status, User bit and Validity) bits on the
+        * incoming audio stream (support limited to Linear PCM audio)
+        */
+       if (hdmi_read(audio, HDMI_DESIGN_ID) > 0x21)
+               hdmi_write(audio, HDMI_AUD_CONF2_INSERT_PCUV, HDMI_AUD_CONF2);
        dw_hdmi_audio_enable(hdmi);
 
        return 0;