intel_sst: Ensure LPE is in stalled before downloading Firmware

The FW download fail error occurs mainly when the copy of LPE FW code
and data from audio driver to the DSP IRAM/DRAM is not successful or
encounters error.But there is no mechanism in driver to know if the
memcpy_toio has failed or not.

This patch ensures LPE is in stalled state before copying the firmware

Change-Id: I9a4ed7fbddbfac9140daaa53b949e76729d104a5
Signed-off-by: Jeeja <jeeja.kp@intel.com>

diff --git a/drivers/staging/intel_sst/intel_sst_dsp.c b/drivers/staging/intel_sst/intel_sst_dsp.c
index a89e1ad..25685fb 100644 (file)
--- a/drivers/staging/intel_sst/intel_sst_dsp.c
+++ b/drivers/staging/intel_sst/intel_sst_dsp.c
@@ -75,6 +75,7 @@ static int intel_sst_reset_dsp_medfield(void)
        pr_debug("Resetting the DSP in medfield\n");
        csr.full = sst_shim_read(sst_drv_ctx->shim, SST_CSR);
        csr.full |= 0x382;
+       csr.part.run_stall = 0x1;
        sst_shim_write(sst_drv_ctx->shim, SST_CSR, csr.full);
 
        return 0;