From e69d89420e2297a896056bb29746a27d98d9b111 Mon Sep 17 00:00:00 2001 From: Hans Verkuil Date: Mon, 30 Nov 2015 10:26:35 -0200 Subject: [PATCH] [media] cx25840: fix cx25840_s_stream for cx2388x and cx231xx For those two devices the code wrote to addresses 0x115/6, but on those devices those addresses have nothing to do with power controls. So clearly this never worked. Rather than writing to bogus addresses, just do nothing for the cx2388x and cx231xx. Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/cx25840/cx25840-core.c | 37 ++++++++++++------------ 1 file changed, 19 insertions(+), 18 deletions(-) diff --git a/drivers/media/i2c/cx25840/cx25840-core.c b/drivers/media/i2c/cx25840/cx25840-core.c index d8b5343cb80a..a8b1a03d3158 100644 --- a/drivers/media/i2c/cx25840/cx25840-core.c +++ b/drivers/media/i2c/cx25840/cx25840-core.c @@ -1716,26 +1716,27 @@ static int cx25840_s_stream(struct v4l2_subdev *sd, int enable) v4l_dbg(1, cx25840_debug, client, "%s video output\n", enable ? "enable" : "disable"); + + /* + * It's not clear what should be done for these devices. + * The original code used the same addresses as for the cx25840, but + * those addresses do something else entirely on the cx2388x and + * cx231xx. Since it never did anything in the first place, just do + * nothing. + */ + if (is_cx2388x(state) || is_cx231xx(state)) + return 0; + if (enable) { - if (is_cx2388x(state) || is_cx231xx(state)) { - v = cx25840_read(client, 0x421) | 0x0b; - cx25840_write(client, 0x421, v); - } else { - v = cx25840_read(client, 0x115) | 0x0c; - cx25840_write(client, 0x115, v); - v = cx25840_read(client, 0x116) | 0x04; - cx25840_write(client, 0x116, v); - } + v = cx25840_read(client, 0x115) | 0x0c; + cx25840_write(client, 0x115, v); + v = cx25840_read(client, 0x116) | 0x04; + cx25840_write(client, 0x116, v); } else { - if (is_cx2388x(state) || is_cx231xx(state)) { - v = cx25840_read(client, 0x421) & ~(0x0b); - cx25840_write(client, 0x421, v); - } else { - v = cx25840_read(client, 0x115) & ~(0x0c); - cx25840_write(client, 0x115, v); - v = cx25840_read(client, 0x116) & ~(0x04); - cx25840_write(client, 0x116, v); - } + v = cx25840_read(client, 0x115) & ~(0x0c); + cx25840_write(client, 0x115, v); + v = cx25840_read(client, 0x116) & ~(0x04); + cx25840_write(client, 0x116, v); } return 0; }