Hi,
On 02/09/2019 05:54, Cheng-Yi Chiang wrote:
> In the designware databook, the sequence of enabling audio clock and
> setting format is not clearly specified.
> Currently, audio clock is enabled in the end of hw_param ops after
> setting format.
>
> On some monitors, there is a possibility that audio does not come out.
> Fix this by enabling audio clock in audio_startup ops
> before hw_param ops setting format.
>
> Signed-off-by: Cheng-Yi Chiang <cychiang@xxxxxxxxxxxx>
> Reviewed-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> Reviewed-by: Jonas Karlman <jonas@xxxxxxxxx>
> Tested-by: Douglas Anderson <dianders@xxxxxxxxxxxx>
> ---
> Changes from v1:
> 1. Move audio_startup to the front of audio_shutdown.
> 2. Fix the indentation of audio_startup equal sign using tab.
> 3. Rebase the patch on linux-next/master.
> 4. Add Reviewed-by and Tested-by fields from dianders@xxxxxxxxxxxx.
> 5. Add Reviewed-by field from jonas@xxxxxxxxx.
>
> drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c | 9 +++++++++
> 1 file changed, 9 insertions(+)
>
> diff --git a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> index 1d15cf9b6821..34d8e837555f 100644
> --- a/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> +++ b/drivers/gpu/drm/bridge/synopsys/dw-hdmi-i2s-audio.c
> @@ -109,6 +109,14 @@ static int dw_hdmi_i2s_hw_params(struct device *dev, void *data,
> hdmi_write(audio, conf0, HDMI_AUD_CONF0);
> hdmi_write(audio, conf1, HDMI_AUD_CONF1);
>
> + return 0;
> +}
> +
> +static int dw_hdmi_i2s_audio_startup(struct device *dev, void *data)
> +{
> + struct dw_hdmi_i2s_audio_data *audio = data;
> + struct dw_hdmi *hdmi = audio->hdmi;
> +
> dw_hdmi_audio_enable(hdmi);
>
> return 0;
> @@ -153,6 +161,7 @@ static int dw_hdmi_i2s_get_dai_id(struct snd_soc_component *component,
>
> static struct hdmi_codec_ops dw_hdmi_i2s_ops = {
> .hw_params = dw_hdmi_i2s_hw_params,
> + .audio_startup = dw_hdmi_i2s_audio_startup,
> .audio_shutdown = dw_hdmi_i2s_audio_shutdown,
> .get_eld = dw_hdmi_i2s_get_eld,
> .get_dai_id = dw_hdmi_i2s_get_dai_id,
>
Looks sane, Jonas should I apply it now it's rebased ?
Neil
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