ASoC: rsnd: Fix "status check failed" spam for multi-SSI

Fix the rsnd_ssi_stop function to skip disabling the individual SSIs of
a multi-SSI setup, as the actual stop is performed by rsnd_ssiu_stop_gen2
- the same logic as in rsnd_ssi_start. The attempt to disable these SSIs
was harmless, but caused a "status check failed" message to be printed
for every SSI in the multi-SSI setup.
The disabling of interrupts is still performed, as they are enabled for
all SSIs in rsnd_ssi_init, but care is taken to not accidentally set the
EN bit for an SSI where it was not set by rsnd_ssi_start.

Signed-off-by: Matthias Blankertz <matthias.blankertz@cetitec.com>
Acked-by: Kuninori Morimoto <kuninori.morimoto.gx@renesas.com>
Link: https://lore.kernel.org/r/20200417153017.1744454-3-matthias.blankertz@cetitec.com
Signed-off-by: Mark Brown <broonie@kernel.org>

diff --git a/sound/soc/sh/rcar/ssi.c b/sound/soc/sh/rcar/ssi.c
index 9900a4f..4a7d341 100644 (file)
--- a/sound/soc/sh/rcar/ssi.c
+++ b/sound/soc/sh/rcar/ssi.c
@@ -594,10 +594,16 @@ static int rsnd_ssi_stop(struct rsnd_mod *mod,
         * Capture:  It might not receave data. Do nothing
         */
        if (rsnd_io_is_play(io)) {
-               rsnd_mod_write(mod, SSICR, cr | EN);
+               rsnd_mod_write(mod, SSICR, cr | ssi->cr_en);
                rsnd_ssi_status_check(mod, DIRQ);
        }
 
+       /* In multi-SSI mode, stop is performed by setting ssi0129 in
+        * SSI_CONTROL to 0 (in rsnd_ssio_stop_gen2). Do nothing here.
+        */
+       if (rsnd_ssi_multi_slaves_runtime(io))
+               return 0;
+
        /*
         * disable SSI,
         * and, wait idle state