On Tue 2015-01-27 15:27:58, Peter Ujfalusi wrote:
> Hi,
>
> On 01/26/2015 10:51 PM, Pali Rohár wrote:
> > qemu does not emulate it
>
> Not sure about this... How does qemu emulate tlv320aic3106, tpa6130a2a, McBSP,
> sDMA for audio to work? What about the other three GPIOs in this machine
> driver?
>
> The "nokia,n900-audio" compatible mandates that the jack-detection GPIO must
> be provided (Documentation/devicetree/bindings/sound/nokia,rx51.txt) since it
> means that the driver is running on the Nokia n900 HW.
Fix the documentation, then :-). [Actually, GPIO is provided, it just
can't be requested, AFAICT.]
It is quite important to keep qemu working, really. Debugging early
boot on hardware is very hard, for example.
And yes, some day we may need different dts for n900-qemu
(vs. n900-hw), but lets not do it just yet.
Pavel
>
> > Signed-off-by: Pali Rohár <[email protected]>
> > ---
> > sound/soc/omap/rx51.c | 45 +++++++++++++++++++++++++--------------------
> > 1 file changed, 25 insertions(+), 20 deletions(-)
> >
> > diff --git a/sound/soc/omap/rx51.c b/sound/soc/omap/rx51.c
> > index 04896d6..a689021 100644
> > --- a/sound/soc/omap/rx51.c
> > +++ b/sound/soc/omap/rx51.c
> > @@ -310,25 +310,27 @@ static int rx51_aic34_init(struct snd_soc_pcm_runtime
> > *rtd)
> > return err;
> > }
> >
> > - /* AV jack detection */
> > - err = snd_soc_jack_new(codec, "AV Jack",
> > - SND_JACK_HEADSET | SND_JACK_VIDEOOUT,
> > - &rx51_av_jack);
> > - if (err) {
> > - dev_err(card->dev, "Failed to add AV Jack\n");
> > - return err;
> > - }
> > + if (!IS_ERR(pdata->jack_detection_gpio)) {
> > + /* AV jack detection */
> > + err = snd_soc_jack_new(codec, "AV Jack",
> > + SND_JACK_HEADSET | SND_JACK_VIDEOOUT,
> > + &rx51_av_jack);
> > + if (err) {
> > + dev_err(card->dev, "Failed to add AV Jack\n");
> > + return err;
> > + }
> >
> > - /* prepare gpio for snd_soc_jack_add_gpios */
> > - rx51_av_jack_gpios[0].gpio = desc_to_gpio(pdata->jack_detection_gpio);
> > - devm_gpiod_put(card->dev, pdata->jack_detection_gpio);
> > + /* prepare gpio for snd_soc_jack_add_gpios */
> > + rx51_av_jack_gpios[0].gpio =
> > desc_to_gpio(pdata->jack_detection_gpio);
> > + devm_gpiod_put(card->dev, pdata->jack_detection_gpio);
> >
> > - err = snd_soc_jack_add_gpios(&rx51_av_jack,
> > - ARRAY_SIZE(rx51_av_jack_gpios),
> > - rx51_av_jack_gpios);
> > - if (err) {
> > - dev_err(card->dev, "Failed to add GPIOs\n");
> > - return err;
> > + err = snd_soc_jack_add_gpios(&rx51_av_jack,
> > + ARRAY_SIZE(rx51_av_jack_gpios),
> > + rx51_av_jack_gpios);
> > + if (err) {
> > + dev_err(card->dev, "Failed to add GPIOs\n");
> > + return err;
> > + }
> > }
> >
> > return err;
> > @@ -336,8 +338,11 @@ static int rx51_aic34_init(struct snd_soc_pcm_runtime
> > *rtd)
> >
> > static int rx51_card_remove(struct snd_soc_card *card)
> > {
> > - snd_soc_jack_free_gpios(&rx51_av_jack, ARRAY_SIZE(rx51_av_jack_gpios),
> > - rx51_av_jack_gpios);
> > + struct rx51_audio_pdata *pdata = snd_soc_card_get_drvdata(card);
> > +
> > + if (!IS_ERR(pdata->jack_detection_gpio))
> > + snd_soc_jack_free_gpios(&rx51_av_jack,
> > ARRAY_SIZE(rx51_av_jack_gpios),
> > + rx51_av_jack_gpios);
> >
> > return 0;
> > }
> > @@ -470,8 +475,8 @@ static int rx51_soc_probe(struct platform_device *pdev)
> > pdata->jack_detection_gpio = devm_gpiod_get(card->dev,
> > "jack-detection");
> > if (IS_ERR(pdata->jack_detection_gpio)) {
> > + /* Do not fail, qemu does not emulate jack detection gpio */
> > dev_err(card->dev, "could not get jack detection gpio\n");
> > - return PTR_ERR(pdata->jack_detection_gpio);
> > }
> >
> > pdata->eci_sw_gpio = devm_gpiod_get(card->dev, "eci-switch");
> >
>
>
--
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(cesky, pictures)
http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html
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