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| 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-firmware.c | |
| parent | 00cb9f6920aaeb34bcef146085ae57e363641a85 (diff) | |
| download | kernel_samsung_smdk4412-587808d5f59e842f9258a15e88ad530fcf6e6763.zip kernel_samsung_smdk4412-587808d5f59e842f9258a15e88ad530fcf6e6763.tar.gz kernel_samsung_smdk4412-587808d5f59e842f9258a15e88ad530fcf6e6763.tar.bz2 | |
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-firmware.c')
| -rw-r--r-- | drivers/media/video/ivtv/ivtv-firmware.c | 2 |
1 files changed, 1 insertions, 1 deletions
diff --git a/drivers/media/video/ivtv/ivtv-firmware.c b/drivers/media/video/ivtv/ivtv-firmware.c index c1b7ec4..a71e8ba 100644 --- a/drivers/media/video/ivtv/ivtv-firmware.c +++ b/drivers/media/video/ivtv/ivtv-firmware.c @@ -258,7 +258,7 @@ void ivtv_init_mpeg_decoder(struct ivtv *itv) IVTV_ERR("ivtv_init_mpeg_decoder failed to start playback\n"); return; } - ivtv_api_get_data(&itv->dec_mbox, IVTV_MBOX_DMA, data); + ivtv_api_get_data(&itv->dec_mbox, IVTV_MBOX_DMA, 2, data); mem_offset = itv->dec_mem + data[1]; if ((readbytes = load_fw_direct(IVTV_DECODE_INIT_MPEG_FILENAME, |