Am 05.09.2017 um 18:12 schrieb Charles Keepax:
On Mon, Sep 04, 2017 at 09:34:12PM +0200, Sergej Sawazki wrote:
+ /* oversampling rate */
+ if (params_rate(params) > 96000)
+ mode |= 0x0040;
+ else if (params_rate(params) > 48000)
+ mode |= 0x0020;
Should this not have a case for <= 48k as well? To reset the mode
if it was set on a previous playback.
It is reset in here:
u16 mode = snd_soc_read(codec, WM8741_MODE_CONTROL_1) & 0x183;
For <= 48k we simply leave it 0. I though about an empty else statement,
but it is kind of strange, too.
+
/* bit size */
switch (params_width(params)) {
case 16:
@@ -243,6 +250,7 @@ static int wm8741_hw_params(struct snd_pcm_substream *substream,
params_width(params), params_rate(params));
snd_soc_write(codec, WM8741_FORMAT_CONTROL, iface);
+ snd_soc_write(codec, WM8741_MODE_CONTROL_1, mode);
Better to use an update_bits rather than basically open-code it
with read and then this write.
I have used write() and not update_bits() here to be consistent with the
way the WM8741_FORMAT_CONTROL register is written. If we change it to
update_bits(), we should refactor the WM8741_FORMAT_CONTROL write to use
update_bits() too, right?
Thanks,
Sergej
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