[PATCH v9 03/14] ASoC: sun4i-i2s: Change get_sr() and get_wss() to be more explicit
From: Clément Péron <hidden>
Date: 2020-10-27 18:32:04
Also in:
alsa-devel, linux-devicetree, lkml
Subsystem:
sound, sound - soc layer / dynamic audio power management (asoc), the rest · Maintainers:
Jaroslav Kysela, Takashi Iwai, Liam Girdwood, Mark Brown, Linus Torvalds
We are actually using a complex formula to just return a bunch of
simple values. Also this formula is wrong for sun4i when calling
get_wss() the function return 4 instead of 3.
Replace this with a simpler switch case.
Also drop the i2s params which is unused and return a simple int as
returning an error code could be out of range for an s8 and there is
no optim to return a s8 here.
Fixes: 619c15f7fac9 ("ASoC: sun4i-i2s: Change SR and WSS computation")
Reviewed-by: Chen-Yu Tsai <redacted>
Acked-by: Maxime Ripard <mripard@kernel.org>
Signed-off-by: Clément Péron <redacted>
---
sound/soc/sunxi/sun4i-i2s.c | 69 +++++++++++++++++++++++--------------
1 file changed, 44 insertions(+), 25 deletions(-)
diff --git a/sound/soc/sunxi/sun4i-i2s.c b/sound/soc/sunxi/sun4i-i2s.c
index 9aa837d4fe99..073ee60da011 100644
--- a/sound/soc/sunxi/sun4i-i2s.c
+++ b/sound/soc/sunxi/sun4i-i2s.c@@ -175,8 +175,8 @@ struct sun4i_i2s_quirks { unsigned int num_mclk_dividers; unsigned long (*get_bclk_parent_rate)(const struct sun4i_i2s *); - s8 (*get_sr)(const struct sun4i_i2s *, int); - s8 (*get_wss)(const struct sun4i_i2s *, int); + int (*get_sr)(unsigned int width); + int (*get_wss)(unsigned int width); /* * In the set_chan_cfg() function pointer:
@@ -387,37 +387,56 @@ static int sun4i_i2s_set_clk_rate(struct snd_soc_dai *dai, return 0; } -static s8 sun4i_i2s_get_sr(const struct sun4i_i2s *i2s, int width) +static int sun4i_i2s_get_sr(unsigned int width) { - if (width < 16 || width > 24) - return -EINVAL; - - if (width % 4) - return -EINVAL; + switch (width) { + case 16: + return 0; + case 20: + return 1; + case 24: + return 2; + } - return (width - 16) / 4; + return -EINVAL; } -static s8 sun4i_i2s_get_wss(const struct sun4i_i2s *i2s, int width) +static int sun4i_i2s_get_wss(unsigned int width) { - if (width < 16 || width > 32) - return -EINVAL; - - if (width % 4) - return -EINVAL; + switch (width) { + case 16: + return 0; + case 20: + return 1; + case 24: + return 2; + case 32: + return 3; + } - return (width - 16) / 4; + return -EINVAL; } -static s8 sun8i_i2s_get_sr_wss(const struct sun4i_i2s *i2s, int width) +static int sun8i_i2s_get_sr_wss(unsigned int width) { - if (width % 4) - return -EINVAL; - - if (width < 8 || width > 32) - return -EINVAL; + switch (width) { + case 8: + return 1; + case 12: + return 2; + case 16: + return 3; + case 20: + return 4; + case 24: + return 5; + case 28: + return 6; + case 32: + return 7; + } - return (width - 8) / 4 + 1; + return -EINVAL; } static int sun4i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
@@ -582,11 +601,11 @@ static int sun4i_i2s_hw_params(struct snd_pcm_substream *substream, } i2s->playback_dma_data.addr_width = width; - sr = i2s->variant->get_sr(i2s, word_size); + sr = i2s->variant->get_sr(word_size); if (sr < 0) return -EINVAL; - wss = i2s->variant->get_wss(i2s, slot_width); + wss = i2s->variant->get_wss(slot_width); if (wss < 0) return -EINVAL;
--
2.25.1
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