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| author |   Daniel González Cabanelas <dgcbueu@gmail.com> | 2022-02-20 19:19:50 +0100 |
|---|---|---|
| committer |   Hans Verkuil <hverkuil-cisco@xs4all.nl> | 2022-02-22 09:41:12 +0100 |
| commit | 56cb61f70e547e1b0cdfe6ff5a1f1ce6242e6d96 (patch) | |
| tree | 58fb2d9d17d561786a0dcb38afc4631f2917b1d5 /drivers/media/pci | |
| parent | media: cedrus: H265: Fix neighbour info buffer size (diff) | |
| download | linux-dev-56cb61f70e547e1b0cdfe6ff5a1f1ce6242e6d96.tar.xz linux-dev-56cb61f70e547e1b0cdfe6ff5a1f1ce6242e6d96.zip | |
media: cx88-mpeg: clear interrupt status register before streaming video
Some cx88 video cards may have transport stream status interrupts set
to 1 from cold start, causing errors like this:
cx88xx: cx88_print_irqbits: core:irq mpeg [0x100000] ts_err?*
cx8802: cx8802_mpeg_irq: mpeg:general errors: 0x00100000
According to CX2388x datasheet, the interrupt status register should be
cleared before enabling IRQs to stream video.
Fix it by clearing the Transport Stream Interrupt Status register.
Signed-off-by: Daniel González Cabanelas <dgcbueu@gmail.com>
Diffstat (limited to 'drivers/media/pci')
| -rw-r--r-- | drivers/media/pci/cx88/cx88-mpeg.c | 3 |
1 files changed, 3 insertions, 0 deletions
diff --git a/drivers/media/pci/cx88/cx88-mpeg.c b/drivers/media/pci/cx88/cx88-mpeg.c index 680e1e3fe89b..2c1d5137ac47 100644 --- a/drivers/media/pci/cx88/cx88-mpeg.c +++ b/drivers/media/pci/cx88/cx88-mpeg.c @@ -162,6 +162,9 @@ int cx8802_start_dma(struct cx8802_dev *dev, cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET); q->count = 0; + /* clear interrupt status register */ + cx_write(MO_TS_INTSTAT, 0x1f1111); + /* enable irqs */ dprintk(1, "setting the interrupt mask\n"); cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT); |