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drm/mediatek: mtk_hdmi: Move N/CTS setting to new function

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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@mediatek.com>
Signed-off-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20250415104321.51149-12-angelogioacchino.delregno@collabora.com/
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
This commit is contained in:
AngeloGioacchino Del Regno 2025-04-15 12:43:09 +02:00 committed by Chun-Kuang Hu
parent c92493e307
commit 7837702058
1 changed files with 8 additions and 2 deletions
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10
drivers/gpu/drm/mediatek/mtk_hdmi.c
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@ -675,6 +675,13 @@ 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)
{
@ -705,8 +712,7 @@ 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);