On Thu, 24 Apr 2014 11:32:29 +0200 Markus Pargmann mpa@pengutronix.de wrote:
On Thu, Apr 24, 2014 at 11:09:36AM +0200, David Jander wrote:
On Thu, 24 Apr 2014 10:46:30 +0200 Markus Pargmann mpa@pengutronix.de wrote:
Hi,
On Wed, Apr 23, 2014 at 05:50:18PM +0200, David Jander wrote:
This enables effectively swapping RX/TX pins on the external audio port
Signed-off-by: David Jander david@protonic.nl
Documentation/devicetree/bindings/sound/imx-audio-sgtl5000.txt | 4 ++++ sound/soc/fsl/imx-sgtl5000.c | 5 ++++- 2 files changed, 8 insertions(+), 1 deletion(-)
diff --git a/Documentation/devicetree/bindings/sound/imx-audio-sgtl5000.txt b/Documentation/devicetree/bindings/sound/imx-audio-sgtl5000.txt index e4acdd8..3afea85 100644 --- a/Documentation/devicetree/bindings/sound/imx-audio-sgtl5000.txt +++ b/Documentation/devicetree/bindings/sound/imx-audio-sgtl5000.txt @@ -29,6 +29,10 @@ Required properties:
- mux-int-port : The internal port of the i.MX audio muxer (AUDMUX)
- mux-ext-port : The external port of the i.MX audio muxer
+Optional properties: +- ext-port-txrxen : Flag. Set to swap RX/TX signals on external port (set the
- IMX_AUDMUX_V2_PDCR_TXRXEN bit in the PDC register of the external
port) + Note: The AUDMUX port numbering should start at 1, which is consistent with hardware manual.
You could also try to use the simple sound card and use DT properties to setup audmux.
This is a configuration example for the audmux: &audmux { status = "okay";
aud4 { fsl,audmux-port = <MX31_AUDMUX_PORT4_SSI_PINS_4>; fsl,port-config = < (IMX_AUDMUX_V2_PTCR_SYN | IMX_AUDMUX_V2_PTCR_TFSDIR | IMX_AUDMUX_V2_PTCR_TFSEL(MX31_AUDMUX_PORT1_SSI0)| IMX_AUDMUX_V2_PTCR_TCLKDIR | IMX_AUDMUX_V2_PTCR_TCSEL(MX31_AUDMUX_PORT1_SSI0)) IMX_AUDMUX_V2_PDCR_RXDSEL(MX31_AUDMUX_PORT1_SSI0) >; }; };
I tried this, but the glue driver imx-sgtl5000.c changes the port settings to its own knowledge.... and that includes hard-coded clearing of the IMX_AUDMUX_V2_PDCR_TXRXEN bit.
How can I avoid the imx-sgtl5000.c driver from clearing the settings I specify in the AUDMUX driver?
You can use the simple sound card (sound/soc/generic/simple-card.c). The sound card properties have to be described in the DT. See Documentation/devicetree/bindings/sound/simple-card.txt
This looks very interesting. I was not aware of this. Thanks! I will see if this solves my problem.
Best regards,