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Commit 24858b9c authored by Brad Love's avatar Brad Love Committed by Greg Kroah-Hartman
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media: cx23885: Override 888 ImpactVCBe crystal frequency 



[ Upstream commit 779c79d4b833ec646b0aed878da38edb45bbe156 ]

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: default avatarBrad Love <brad@nextdimension.cc>
Signed-off-by: default avatarMauro Carvalho Chehab <mchehab@s-opensource.com>
Signed-off-by: default avatarSasha Levin <alexander.levin@microsoft.com>
Signed-off-by: default avatarGreg Kroah-Hartman <gregkh@linuxfoundation.org>
parent 1c94830e

drivers/media/pci/cx23885/cx23885-core.c

+10 −0
Original line number Diff line number Diff line
@@ -873,6 +873,16 @@ 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);