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 <[email protected]>
Signed-off-by: Clément Péron <[email protected]>
---
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 1f577dbc20a6..8e497fb3de09 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);
int (*set_chan_cfg)(const struct sun4i_i2s *i2s,
unsigned int channels, unsigned int slots,
unsigned int slot_width);
@@ -381,37 +381,56 @@ 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 0x0;
+ case 20:
+ return 0x1;
+ case 24:
+ return 0x2;
+ }
- 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 0x0;
+ case 20:
+ return 0x1;
+ case 24:
+ return 0x2;
+ case 32:
+ return 0x3;
+ }
- 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 0x1;
+ case 12:
+ return 0x2;
+ case 16:
+ return 0x3;
+ case 20:
+ return 0x4;
+ case 24:
+ return 0x5;
+ case 28:
+ return 0x6;
+ case 32:
+ return 0x7;
+ }
- return (width - 8) / 4 + 1;
+ return -EINVAL;
}
static int sun4i_i2s_set_chan_cfg(const struct sun4i_i2s *i2s,
@@ -574,11 +593,11 @@ 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
On Sat, Oct 03, 2020 at 04:19:39PM +0200, Cl?ment P?ron wrote:
> 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 <[email protected]>
> Signed-off-by: Cl?ment P?ron <[email protected]>
> ---
> 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 1f577dbc20a6..8e497fb3de09 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);
> int (*set_chan_cfg)(const struct sun4i_i2s *i2s,
> unsigned int channels, unsigned int slots,
> unsigned int slot_width);
> @@ -381,37 +381,56 @@ 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 0x0;
> + case 20:
> + return 0x1;
> + case 24:
> + return 0x2;
> + }
>
> - 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 0x0;
> + case 20:
> + return 0x1;
> + case 24:
> + return 0x2;
> + case 32:
> + return 0x3;
> + }
Like I said in the previous version, I'm not really sure why we need to
use the hexadecimal representation here?
Maxime
Hi Maxime,
On Mon, 5 Oct 2020 at 14:14, Maxime Ripard <[email protected]> wrote:
>
> On Sat, Oct 03, 2020 at 04:19:39PM +0200, Clément Péron wrote:
> > 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 <[email protected]>
> > Signed-off-by: Clément Péron <[email protected]>
> > ---
> > 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 1f577dbc20a6..8e497fb3de09 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);
> > int (*set_chan_cfg)(const struct sun4i_i2s *i2s,
> > unsigned int channels, unsigned int slots,
> > unsigned int slot_width);
> > @@ -381,37 +381,56 @@ 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 0x0;
> > + case 20:
> > + return 0x1;
> > + case 24:
> > + return 0x2;
> > + }
> >
> > - 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 0x0;
> > + case 20:
> > + return 0x1;
> > + case 24:
> > + return 0x2;
> > + case 32:
> > + return 0x3;
> > + }
>
> Like I said in the previous version, I'm not really sure why we need to
> use the hexadecimal representation here?
I'm not sure if there is a convention when to use hexa or when not to use it.
But these figures are taken from the User Manual where register
descriptions are written in Base 2 and default values are written in
Base 16.
It's easier to read them and check that the code follows the documentation, no ?
Indeed with 2 bits this doesn't change anything.
Do you want me to change them in decimal ?
Clement
>
> Maxime