From: Daniel González Cabanelas Date: Sun, 20 Feb 2022 18:19:50 +0000 (+0100) Subject: media: cx88-mpeg: clear interrupt status register before streaming video X-Git-Tag: v6.1-rc5~1763^2~86^2~8 X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=56cb61f70e547e1b0cdfe6ff5a1f1ce6242e6d96;p=platform%2Fkernel%2Flinux-starfive.git 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 --- diff --git a/drivers/media/pci/cx88/cx88-mpeg.c b/drivers/media/pci/cx88/cx88-mpeg.c index 680e1e3..2c1d513 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);