diff options
| author | Daniel Drake <drake@endlessm.com> | 2019-03-26 08:04:15 +0100 |
|---|---|---|
| committer | Ulf Hansson <ulf.hansson@linaro.org> | 2019-04-15 11:55:54 +0200 |
| commit | e5a34b0c1071e6b6b6cfca4c6887c39cd403dd77 (patch) | |
| tree | ed4df9ab8f480a02e47c68aca968e557c0169df0 /drivers/mmc | |
| parent | mmc: sdhci-of-arasan: Add DTS property to disable DCMDs. (diff) | |
| download | linux-e5a34b0c1071e6b6b6cfca4c6887c39cd403dd77.tar.xz linux-e5a34b0c1071e6b6b6cfca4c6887c39cd403dd77.zip | |
mmc: alcor: enable DMA for writes
Enable the DMA codepath for writes as well as reads.
This improves write speed from 1mb/sec to 2mb/sec (tested with dd).
The original ampe_stor vendor driver also uses DMA for writes.
Signed-off-by: Daniel Drake <drake@endlessm.com>
Signed-off-by: Ulf Hansson <ulf.hansson@linaro.org>
Diffstat (limited to 'drivers/mmc')
| -rw-r--r-- | drivers/mmc/host/alcor.c | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/mmc/host/alcor.c b/drivers/mmc/host/alcor.c index 7c8f203f9a24..3e2efbf3cf8c 100644 --- a/drivers/mmc/host/alcor.c +++ b/drivers/mmc/host/alcor.c @@ -771,7 +771,8 @@ static void alcor_pre_req(struct mmc_host *mmc, data->host_cookie = COOKIE_UNMAPPED; /* FIXME: looks like the DMA engine works only with CMD18 */ - if (cmd->opcode != 18) + if (cmd->opcode != MMC_READ_MULTIPLE_BLOCK + && cmd->opcode != MMC_WRITE_MULTIPLE_BLOCK) return; /* * We don't do DMA on "complex" transfers, i.e. with |