From: Daniel González Cabanelas <dgcbueu@gmail.com> stable inclusion from stable-v5.10.110 commit a49b687a75d2d42301ec9a5fda356750827900e7 bugzilla: https://gitee.com/openeuler/kernel/issues/I574AL Reference: https://git.kernel.org/pub/scm/linux/kernel/git/stable/linux.git/commit/?id=... -------------------------------- [ Upstream commit 56cb61f70e547e1b0cdfe6ff5a1f1ce6242e6d96 ] 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> Signed-off-by: Sasha Levin <sashal@kernel.org> Signed-off-by: Yu Liao <liaoyu15@huawei.com> Reviewed-by: Wei Li <liwei391@huawei.com> Signed-off-by: Zheng Zengkai <zhengzengkai@huawei.com> --- drivers/media/pci/cx88/cx88-mpeg.c | 3 +++ 1 file changed, 3 insertions(+) diff --git a/drivers/media/pci/cx88/cx88-mpeg.c b/drivers/media/pci/cx88/cx88-mpeg.c index a57c991b165b..10d2971ef062 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); -- 2.20.1