From: Andrey Shvetsov <andrey.shvetsov@xxxxxx> 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.shvetsov@xxxxxx> Signed-off-by: Christian Gromm <christian.gromm@xxxxxxxxxxxxx> --- 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 _______________________________________________ devel mailing list devel@xxxxxxxxxxxxxxxxxxxxxx http://driverdev.linuxdriverproject.org/mailman/listinfo/driverdev-devel
