1 files changed, 8 insertions, 5 deletions

diff --git a/arch/arm/plat-omap/mcbsp.c b/arch/arm/plat-omap/mcbsp.c
index e31496e35b0f..ecbfe398a309 100644
--- a/arch/arm/plat-omap/mcbsp.c
+++ b/arch/arm/plat-omap/mcbsp.c
@@ -878,7 +878,7 @@ EXPORT_SYMBOL(omap_mcbsp_free);
 void omap_mcbsp_start(unsigned int id, int tx, int rx)
 {
         struct omap_mcbsp *mcbsp;
-        int idle;
+        int enable_srg = 0;
         u16 w;
 
         if (!omap_mcbsp_check_valid_id(id)) {
@@ -893,10 +893,13 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx)
         mcbsp->rx_word_length = (MCBSP_READ_CACHE(mcbsp, RCR1) >> 5) & 0x7;
         mcbsp->tx_word_length = (MCBSP_READ_CACHE(mcbsp, XCR1) >> 5) & 0x7;
 
-        idle = !((MCBSP_READ_CACHE(mcbsp, SPCR2) |
-                        MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1);
+        /* Only enable SRG, if McBSP is master */
+        w = MCBSP_READ_CACHE(mcbsp, PCR0);
+        if (w & (FSXM | FSRM | CLKXM | CLKRM))
+                enable_srg = !((MCBSP_READ_CACHE(mcbsp, SPCR2) |
+                                MCBSP_READ_CACHE(mcbsp, SPCR1)) & 1);
 
-        if (idle) {
+        if (enable_srg) {
                 /* Start the sample generator */
                 w = MCBSP_READ_CACHE(mcbsp, SPCR2);
                 MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 6));
@@ -919,7 +922,7 @@ void omap_mcbsp_start(unsigned int id, int tx, int rx)
          */
         udelay(500);
 
-        if (idle) {
+        if (enable_srg) {
                 /* Start frame sync */
                 w = MCBSP_READ_CACHE(mcbsp, SPCR2);
                 MCBSP_WRITE(mcbsp, SPCR2, w | (1 << 7));