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media: cx88-mpeg: clear interrupt status register before streaming video
[ Upstream commit 56cb61f70e
]
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>
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@ -162,6 +162,9 @@ int cx8802_start_dma(struct cx8802_dev *dev,
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cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
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cx_write(MO_TS_GPCNTRL, GP_COUNT_CONTROL_RESET);
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q->count = 0;
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q->count = 0;
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/* clear interrupt status register */
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cx_write(MO_TS_INTSTAT, 0x1f1111);
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/* enable irqs */
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/* enable irqs */
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dprintk(1, "setting the interrupt mask\n");
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dprintk(1, "setting the interrupt mask\n");
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cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
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cx_set(MO_PCI_INTMSK, core->pci_irqmask | PCI_INT_TSINT);
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