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media: cx23885: Add some missing register documentation 

Document what these two register calls are doing.

Signed-off-by: Brad Love <brad@nextdimension.cc>
Signed-off-by: Hans Verkuil <hansverk@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Brad Love 2018-05-08 17:20:20 -04:00 committed by Mauro Carvalho Chehab
parent f72ff638e6
commit ff9d1c0143
1 changed files with 8 additions and 1 deletions
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9
drivers/media/pci/cx23885/cx23885-core.c
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@ -1464,8 +1464,15 @@ int cx23885_start_dma(struct cx23885_tsport *port,
reg = reg | 0xa;
cx_write(PAD_CTRL, reg);
/* FIXME and these two registers should be documented. */
/* Sets MOE_CLK_DIS to disable MoE clock */
/* sets MCLK_DLY_SEL/BCLK_DLY_SEL to 1 buffer delay each */
cx_write(CLK_DELAY, cx_read(CLK_DELAY) | 0x80000011);
/* ALT_GPIO_ALT_SET: GPIO[0]
* IR_ALT_TX_SEL: GPIO[1]
* GPIO1_ALT_SEL: VIP_656_DATA[0]
* GPIO0_ALT_SEL: VIP_656_CLK
*/
cx_write(ALT_PIN_OUT_SEL, 0x10100045);
}