On Tue, 2017-04-18 at 16:18 +0100, Mark Brown wrote:
On Tue, Apr 18, 2017 at 12:59:54PM +0200, Lubomir Rintel wrote:
It makes not sense: the whether the PIO PCM extension is used is hardcoded to the designware_i2s driver and designware_pcm doesn't have any module metadata, causing a kernel taint:
[ 44.287000] designware_pcm: module license 'unspecified' taints kernel.
Signed-off-by: Lubomir Rintel lkundrak@v3.sk
This is not a a good approach, there is no technical reason to force the driver to be built in. If you need a license tag in the module then add that.
I don't think designware_pcm is a separate driver. It looks tightly coupled with designware_i2s: you can either disable designware_pcm altogether at build time or always load it together with designware_i2s.
See sound/soc/dwc/local.h:
#if IS_ENABLED(CONFIG_SND_DESIGNWARE_PCM) void dw_pcm_push_tx(struct dw_i2s_dev *dev); int dw_pcm_register(struct platform_device *pdev); #else void dw_pcm_push_tx(struct dw_i2s_dev *dev) { } int dw_pcm_register(struct platform_device *pdev) { return -EINVAL; } #endif
Lubo