diff options
| author | Andy Walls <awalls@radix.net> | 2010-02-10 15:34:46 -0300 |
|---|---|---|
| committer | Mauro Carvalho Chehab <mchehab@redhat.com> | 2010-02-26 15:11:07 -0300 |
| commit | 587808d5f59e842f9258a15e88ad530fcf6e6763 (patch) | |
| tree | 07252eaff987faf5ad1b6256d520c13ab90e4554 /drivers/media/video/ivtv/ivtv-mailbox.h | |
| parent | 00cb9f6920aaeb34bcef146085ae57e363641a85 (diff) | |
| download | linux-rt-587808d5f59e842f9258a15e88ad530fcf6e6763.tar.gz | |
V4L/DVB: ivtv: Fix ivtv_api_get_data() to avoid unneeded IO during IRQ handling
ivtv_api_get_data() was performing more PCI MMIO than needed, resulting
often in it accounting for more than half the total time spent in
ivtv_irq_handler(). Now it only reads at most 7 of the 16 mailbox data words
over the PCI bus, and in some instances only 2 or 3 data words as needed.
Signed-off-by: Andy Walls <awalls@radix.net>
Signed-off-by: Mauro Carvalho Chehab <mchehab@redhat.com>
Diffstat (limited to 'drivers/media/video/ivtv/ivtv-mailbox.h')
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-mailbox.h | 3 |
1 files changed, 2 insertions, 1 deletions
diff --git a/drivers/media/video/ivtv/ivtv-mailbox.h b/drivers/media/video/ivtv/ivtv-mailbox.h index 6ef12091e3f3..8247662c928e 100644 --- a/drivers/media/video/ivtv/ivtv-mailbox.h +++ b/drivers/media/video/ivtv/ivtv-mailbox.h @@ -24,7 +24,8 @@ #define IVTV_MBOX_DMA_END 8 #define IVTV_MBOX_DMA 9 -void ivtv_api_get_data(struct ivtv_mailbox_data *mbox, int mb, u32 data[]); +void ivtv_api_get_data(struct ivtv_mailbox_data *mbdata, int mb, + int argc, u32 data[]); int ivtv_api(struct ivtv *itv, int cmd, int args, u32 data[]); int ivtv_vapi_result(struct ivtv *itv, u32 data[CX2341X_MBOX_MAX_DATA], int cmd, int args, ...); int ivtv_vapi(struct ivtv *itv, int cmd, int args, ...); |