[03/13] drm: bridge/dw_hdmi: clean up hdmi_set_clk_regenerator()
diff mbox

Message ID E1Yr1xO-0006kg-K0@rmk-PC.arm.linux.org.uk
State New
Headers show

Commit Message

Russell King May 9, 2015, 10:26 a.m. UTC
Clean up hdmi_set_clk_regenerator() by allowing it to take the audio
sample rate and ratio directly, rather than hiding it inside the
function.  Raise the unsupported pixel clock/sample rate message from
debug to error level as this results in audio not working correctly.

Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>
---
 drivers/gpu/drm/bridge/dw_hdmi.c | 32 +++++++++++++++-----------------
 1 file changed, 15 insertions(+), 17 deletions(-)

Comments

Yakir Yang May 22, 2015, 3:22 p.m. UTC | #1
Hi Russell,

? 2015/5/9 18:26, Russell King ??:
> Clean up hdmi_set_clk_regenerator() by allowing it to take the audio
> sample rate and ratio directly, rather than hiding it inside the
> function.  Raise the unsupported pixel clock/sample rate message from
> debug to error level as this results in audio not working correctly.
>
> Signed-off-by: Russell King <rmk+kernel@arm.linux.org.uk>

Test on RK3288 platform, it works wells while do not need clear
the ncts_atomic_write bit in aud_n3, so no need more code it's find.

Test-by: <ykk@rock-chips.com>

Best regards,
Yakir Yang
> ---
>   drivers/gpu/drm/bridge/dw_hdmi.c | 32 +++++++++++++++-----------------
>   1 file changed, 15 insertions(+), 17 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
> index 23ea8c5c85b6..75099b80ca7e 100644
> --- a/drivers/gpu/drm/bridge/dw_hdmi.c
> +++ b/drivers/gpu/drm/bridge/dw_hdmi.c
> @@ -335,39 +335,37 @@ static unsigned int hdmi_compute_cts(unsigned int freq, unsigned long pixel_clk,
>   }
>   
>   static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
> -				     unsigned long pixel_clk)
> +	unsigned long pixel_clk, unsigned int sample_rate, unsigned int ratio)
>   {
> -	unsigned int clk_n, clk_cts;
> +	unsigned int n, cts;
>   
> -	clk_n = hdmi_compute_n(hdmi->sample_rate, pixel_clk,
> -			       hdmi->ratio);
> -	clk_cts = hdmi_compute_cts(hdmi->sample_rate, pixel_clk,
> -				   hdmi->ratio);
> -
> -	if (!clk_cts) {
> -		dev_dbg(hdmi->dev, "%s: pixel clock not supported: %lu\n",
> -			__func__, pixel_clk);
> -		return;
> +	n = hdmi_compute_n(sample_rate, pixel_clk, ratio);
> +	cts = hdmi_compute_cts(sample_rate, pixel_clk, ratio);
> +	if (!cts) {
> +		dev_err(hdmi->dev,
> +			"%s: pixel clock/sample rate not supported: %luMHz / %ukHz\n",
> +			__func__, pixel_clk, sample_rate);
>   	}
>   
> -	dev_dbg(hdmi->dev, "%s: samplerate=%d  ratio=%d  pixelclk=%lu  N=%d cts=%d\n",
> -		__func__, hdmi->sample_rate, hdmi->ratio,
> -		pixel_clk, clk_n, clk_cts);
> +	dev_dbg(hdmi->dev, "%s: samplerate=%ukHz ratio=%d pixelclk=%luMHz N=%d cts=%d\n",
> +		__func__, sample_rate, ratio, pixel_clk, n, cts);
>   
> -	hdmi_set_cts_n(hdmi, clk_cts, clk_n);
> +	hdmi_set_cts_n(hdmi, cts, n);
>   }
>   
>   static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
>   {
>   	mutex_lock(&hdmi->audio_mutex);
> -	hdmi_set_clk_regenerator(hdmi, 74250000);
> +	hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate,
> +				 hdmi->ratio);
>   	mutex_unlock(&hdmi->audio_mutex);
>   }
>   
>   static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
>   {
>   	mutex_lock(&hdmi->audio_mutex);
> -	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock);
> +	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
> +				 hdmi->sample_rate, hdmi->ratio);
>   	mutex_unlock(&hdmi->audio_mutex);
>   }
>

Patch
diff mbox

diff --git a/drivers/gpu/drm/bridge/dw_hdmi.c b/drivers/gpu/drm/bridge/dw_hdmi.c
index 23ea8c5c85b6..75099b80ca7e 100644
--- a/drivers/gpu/drm/bridge/dw_hdmi.c
+++ b/drivers/gpu/drm/bridge/dw_hdmi.c
@@ -335,39 +335,37 @@  static unsigned int hdmi_compute_cts(unsigned int freq, unsigned long pixel_clk,
 }
 
 static void hdmi_set_clk_regenerator(struct dw_hdmi *hdmi,
-				     unsigned long pixel_clk)
+	unsigned long pixel_clk, unsigned int sample_rate, unsigned int ratio)
 {
-	unsigned int clk_n, clk_cts;
+	unsigned int n, cts;
 
-	clk_n = hdmi_compute_n(hdmi->sample_rate, pixel_clk,
-			       hdmi->ratio);
-	clk_cts = hdmi_compute_cts(hdmi->sample_rate, pixel_clk,
-				   hdmi->ratio);
-
-	if (!clk_cts) {
-		dev_dbg(hdmi->dev, "%s: pixel clock not supported: %lu\n",
-			__func__, pixel_clk);
-		return;
+	n = hdmi_compute_n(sample_rate, pixel_clk, ratio);
+	cts = hdmi_compute_cts(sample_rate, pixel_clk, ratio);
+	if (!cts) {
+		dev_err(hdmi->dev,
+			"%s: pixel clock/sample rate not supported: %luMHz / %ukHz\n",
+			__func__, pixel_clk, sample_rate);
 	}
 
-	dev_dbg(hdmi->dev, "%s: samplerate=%d  ratio=%d  pixelclk=%lu  N=%d cts=%d\n",
-		__func__, hdmi->sample_rate, hdmi->ratio,
-		pixel_clk, clk_n, clk_cts);
+	dev_dbg(hdmi->dev, "%s: samplerate=%ukHz ratio=%d pixelclk=%luMHz N=%d cts=%d\n",
+		__func__, sample_rate, ratio, pixel_clk, n, cts);
 
-	hdmi_set_cts_n(hdmi, clk_cts, clk_n);
+	hdmi_set_cts_n(hdmi, cts, n);
 }
 
 static void hdmi_init_clk_regenerator(struct dw_hdmi *hdmi)
 {
 	mutex_lock(&hdmi->audio_mutex);
-	hdmi_set_clk_regenerator(hdmi, 74250000);
+	hdmi_set_clk_regenerator(hdmi, 74250000, hdmi->sample_rate,
+				 hdmi->ratio);
 	mutex_unlock(&hdmi->audio_mutex);
 }
 
 static void hdmi_clk_regenerator_update_pixel_clock(struct dw_hdmi *hdmi)
 {
 	mutex_lock(&hdmi->audio_mutex);
-	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock);
+	hdmi_set_clk_regenerator(hdmi, hdmi->hdmi_data.video_mode.mpixelclock,
+				 hdmi->sample_rate, hdmi->ratio);
 	mutex_unlock(&hdmi->audio_mutex);
 }