On Fri, Jul 31, 2015 at 04:39:20PM +0200, Maciej S. Szmigiero wrote:
On 31.07.2015 07:46, Markus Pargmann wrote:
On Thu, Jul 30, 2015 at 04:35:23PM +0200, Maciej S. Szmigiero wrote:
Instantiate AC'97 CODEC in fsl_ssi driver AC'97 mode.
Signed-off-by: Maciej Szmigiero mail@maciej.szmigiero.name
sound/soc/fsl/fsl_ssi.c | 21 +++++++++++++++++++++ 1 files changed, 21 insertions(+), 0 deletions(-)
diff --git a/sound/soc/fsl/fsl_ssi.c b/sound/soc/fsl/fsl_ssi.c index 154bcf6..8e5ff5e 100644 --- a/sound/soc/fsl/fsl_ssi.c +++ b/sound/soc/fsl/fsl_ssi.c @@ -1460,6 +1460,27 @@ done: _fsl_ssi_set_dai_fmt(&pdev->dev, ssi_private, ssi_private->dai_fmt);
- if (fsl_ssi_is_ac97(ssi_private)) {
u32 ssi_idx;ret = of_property_read_u32(np, "cell-index", &ssi_idx);This property is not set anywhere in the imx* DTs.
That's right, but it is documented as required property in sound/fsl,ssi.txt:
Required properties: (..)
- cell-index: The SSI, <0> = SSI1, <1> = SSI2, and so on.
if (ret) {dev_err(&pdev->dev, "cannot get SSI index property\n");goto error_sound_card;}ssi_private->pdev =platform_device_register_data(NULL,"ac97-codec", ssi_idx, NULL, 0);If you really want to create a device at this point you should use PLATFORM_DEVID_AUTO. I would prefer something where this is created in DT. On the other side it is a discoverable bus..
In the original implementation the codec was instantiated in DT but the feedback was that this is wrong since devices on discoverable buses shouldn't be in DT.
The platform device index is based on SSI index since the sound card driver (fsl-asoc-card) has to know CODEC device name to identify it in DAI links - as the only identification options seem to be either DT node of CODEC or its device name.
That's why the (platform) device name has to be deterministic if there is no mechanism to pass it from controller driver to sound card driver.
Thanks for clarification. I am not really happy with using this cell-index as the whole information that should be necessary is already contained in the memory address range given. The SSI units are otherwise identical in hardware, so cell-index feels like some arbitrary description that is used in the Reference Manual and for software.
However I don't have a better idea how to solve this at the moment and as it is listed as required property and not a new DT binding it can be used.
Best regards,
Markus
Regards,
Markus
Best regards, Maciej Szmigiero