From: Andrey Shvetsov <andrey.shvet...@k2l.de>
As the DBR memory is allocated in units of DBR_BLOCK_SIZE, it is more
efficient to configure the DIM2 IP to use whole blocks of the DBR memory.
This patch ceils the DBR memory size used by the DIM2 IP for async/ctrl
channels.
Signed-off-by: Andrey Shvetsov <andrey.shvet...@k2l.de>
Signed-off-by: Christian Gromm <christian.gr...@microchip.com>
---
drivers/staging/most/hdm-dim2/dim2_hal.c | 4 +++-
1 file changed, 3 insertions(+), 1 deletion(-)
diff --git a/drivers/staging/most/hdm-dim2/dim2_hal.c
b/drivers/staging/most/hdm-dim2/dim2_hal.c
index 0c58ab8..11abce7 100644
--- a/drivers/staging/most/hdm-dim2/dim2_hal.c
+++ b/drivers/staging/most/hdm-dim2/dim2_hal.c
@@ -49,6 +49,8 @@
#define DBR_SIZE (16 * 1024) /* specified by IP */
#define DBR_BLOCK_SIZE (DBR_SIZE / 32 / DBR_MAP_SIZE)
+#define ROUND_UP_TO(x, d) (((x) + (d) - 1) / (d) * (d))
+
/* --------------------------------------------------------------------------
*/
/* generic helper functions and macros */
@@ -698,7 +700,7 @@ static u8 init_ctrl_async(struct dim_channel *ch, u8 type,
u8 is_tx,
if (!check_channel_address(ch_address))
return DIM_INIT_ERR_CHANNEL_ADDRESS;
- ch->dbr_size = hw_buffer_size;
+ ch->dbr_size = ROUND_UP_TO(hw_buffer_size, DBR_BLOCK_SIZE);
ch->dbr_addr = alloc_dbr(ch->dbr_size);
if (ch->dbr_addr >= DBR_SIZE)
return DIM_INIT_ERR_OUT_OF_MEMORY;
--
1.9.1
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