Current DWMMC driver used to give FIFO underrun/overrun error every 3rd time
for mmc rescan command.
In current code FIFO_DEPTH is getting calculated after reading the FIFOTH
register and extracting the RX_WMARK bits from it i.e (RX_WMARK = FIFO_DEPTH/2
-1).
Instead of storing the correct value, we were recalculating the FIFO_DEPT each
time which is not correct.
Signed-off-by: Hatim Ali <hatim...@samsung.com>
Signed-off-by: Rajeshwari Shinde <rajeshwar...@samsung.com>
---
drivers/mmc/dw_mmc.c | 6 ++++--
1 files changed, 4 insertions(+), 2 deletions(-)
diff --git a/drivers/mmc/dw_mmc.c b/drivers/mmc/dw_mmc.c
index 4070d4e..be590a4 100644
--- a/drivers/mmc/dw_mmc.c
+++ b/drivers/mmc/dw_mmc.c
@@ -332,11 +332,13 @@ static int dwmci_init(struct mmc *mmc)
dwmci_writel(host, DWMCI_BMOD, 1);
fifo_size = dwmci_readl(host, DWMCI_FIFOTH);
- if (host->fifoth_val)
+ if (host->fifoth_val) {
fifoth_val = host->fifoth_val;
- else
+ } else {
fifoth_val = MSIZE(0x2) | RX_WMARK(fifo_size/2 -1) |
TX_WMARK(fifo_size/2);
+ host->fifoth_val = fifoth_val;
+ }
dwmci_writel(host, DWMCI_FIFOTH, fifoth_val);
dwmci_writel(host, DWMCI_CLKENA, 0);
--
1.7.4.4
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