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media: cx23885: Override 888 ImpactVCBe crystal frequency

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[ Upstream commit 779c79d4b8 ]

Hauppauge produced a revision of ImpactVCBe using an 888,
with a 25MHz crystal, instead of using the default third
overtone 50Mhz crystal. This overrides that frequency so
that the cx25840 is properly configured. Without the proper
crystal setup the cx25840 cannot load the firmware or
decode video.

Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Mauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: Sasha Levin <alexander.levin@microsoft.com>
Signed-off-by: Greg Kroah-Hartman <gregkh@linuxfoundation.org>
This commit is contained in:
Brad Love
2018-03-06 14:15:37 -05:00
committed by Greg Kroah-Hartman
parent 6eff7dc944
commit dfd5ad1f81
1 changed files with 10 additions and 0 deletions
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10
drivers/media/pci/cx23885/cx23885-core.c
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@@ -872,6 +872,16 @@ static int cx23885_dev_setup(struct cx23885_dev *dev)
if (cx23885_boards[dev->board].clk_freq > 0)
dev->clk_freq = cx23885_boards[dev->board].clk_freq;
if (dev->board == CX23885_BOARD_HAUPPAUGE_IMPACTVCBE &&
dev->pci->subsystem_device == 0x7137) {
/* Hauppauge ImpactVCBe device ID 0x7137 is populated
* with an 888, and a 25Mhz crystal, instead of the
* usual third overtone 50Mhz. The default clock rate must
* be overridden so the cx25840 is properly configured
*/
dev->clk_freq = 25000000;
}
dev->pci_bus = dev->pci->bus->number;
dev->pci_slot = PCI_SLOT(dev->pci->devfn);
cx23885_irq_add(dev, 0x001f00);