[PATCH v3 17/33] drm/mediatek: mtk_hdmi: Move N/CTS setting to new function

[CK Hu (胡俊光)]

Hi, Angelo:

On Tue, 2024-12-17 at 16:43 +0100, AngeloGioacchino Del Regno wrote:
> External email : Please do not click links or open attachments until you have verified the sender or the content.
> 
> 
> In preparation for splitting common bits of this driver, moving
> the hdmi_rec_n_table struct array, and the hdmi_recommended_n(),
> hdmi_mode_clock_to_hz(), hdmi_expected_cts() functions, add one
> function called mtk_hdmi_get_ncts() that sets both N and CTS in
> a single call.

Reviewed-by: CK Hu <ck.hu at mediatek.com>

> 
> Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno at collabora.com>
> ---
>  drivers/gpu/drm/mediatek/mtk_hdmi.c | 10 ++++++++--
>  1 file changed, 8 insertions(+), 2 deletions(-)
> 
> diff --git a/drivers/gpu/drm/mediatek/mtk_hdmi.c b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> index f60c4effe905..ef8dfcb77318 100644
> --- a/drivers/gpu/drm/mediatek/mtk_hdmi.c
> +++ b/drivers/gpu/drm/mediatek/mtk_hdmi.c
> @@ -682,6 +682,13 @@ static unsigned int hdmi_expected_cts(unsigned int audio_sample_rate,
>                                      128 * audio_sample_rate);
>  }
> 
> +static void mtk_hdmi_get_ncts(unsigned int sample_rate, unsigned int clock,
> +                             unsigned int *n, unsigned int *cts)
> +{
> +       *n = hdmi_recommended_n(sample_rate, clock);
> +       *cts = hdmi_expected_cts(sample_rate, clock, *n);
> +}
> +
>  static void do_hdmi_hw_aud_set_ncts(struct mtk_hdmi *hdmi, unsigned int n,
>                                     unsigned int cts)
>  {
> @@ -712,8 +719,7 @@ static void mtk_hdmi_hw_aud_set_ncts(struct mtk_hdmi *hdmi,
>  {
>         unsigned int n, cts;
> 
> -       n = hdmi_recommended_n(sample_rate, clock);
> -       cts = hdmi_expected_cts(sample_rate, clock, n);
> +       mtk_hdmi_get_ncts(sample_rate, clock, &n, &cts);
> 
>         dev_dbg(hdmi->dev, "%s: sample_rate=%u, clock=%d, cts=%u, n=%u\n",
>                 __func__, sample_rate, clock, n, cts);
> --
> 2.47.0
>