From ccf7a31f1ed96ee211f660c488d49a85f586417c Mon Sep 17 00:00:00 2001 From: Maciej S. Szmigiero Date: Mon, 29 Apr 2019 12:16:52 -0400 Subject: media: cx25840: don't open-code cx25840_reset() inside cx25840_load_fw() cx25840_load_fw() does the same thing as cx25840_reset(), only keeps "is_initialized" flag so any further invocation of this function besides the first one is a NOP. Let's just call cx25840_reset() directly from cx25840_load_fw() instead of open coding it there. While we are at it, let's also improve comments about cx25840_load_fw() so they are current and in the proper style (one of them even referred to a non-existing cx25840 init operation). Signed-off-by: Maciej S. Szmigiero Signed-off-by: Hans Verkuil Signed-off-by: Mauro Carvalho Chehab --- drivers/media/i2c/cx25840/cx25840-core.c | 70 ++++++++++++++++---------------- 1 file changed, 34 insertions(+), 36 deletions(-) (limited to 'drivers') diff --git a/drivers/media/i2c/cx25840/cx25840-core.c b/drivers/media/i2c/cx25840/cx25840-core.c index 8b0b8b5aa531..0bf30222cf93 100644 --- a/drivers/media/i2c/cx25840/cx25840-core.c +++ b/drivers/media/i2c/cx25840/cx25840-core.c @@ -1649,32 +1649,46 @@ static void log_audio_status(struct i2c_client *client) /* ----------------------------------------------------------------------- */ -/* This load_fw operation must be called to load the driver's firmware. - Without this the audio standard detection will fail and you will - only get mono. - - Since loading the firmware is often problematic when the driver is - compiled into the kernel I recommend postponing calling this function - until the first open of the video device. Another reason for - postponing it is that loading this firmware takes a long time (seconds) - due to the slow i2c bus speed. So it will speed up the boot process if - you can avoid loading the fw as long as the video device isn't used. */ -static int cx25840_load_fw(struct v4l2_subdev *sd) +static int cx25840_reset(struct v4l2_subdev *sd, u32 val) { struct cx25840_state *state = to_state(sd); struct i2c_client *client = v4l2_get_subdevdata(sd); + if (is_cx2583x(state)) + cx25836_initialize(client); + else if (is_cx2388x(state)) + cx23885_initialize(client); + else if (is_cx231xx(state)) + cx231xx_initialize(client); + else + cx25840_initialize(client); + + state->is_initialized = 1; + + return 0; +} + +/* + * This load_fw operation must be called to load the driver's firmware. + * This will load the firmware on the first invocation (further ones are NOP). + * Without this the audio standard detection will fail and you will + * only get mono. + * Alternatively, you can call the reset operation instead of this one. + * + * Since loading the firmware is often problematic when the driver is + * compiled into the kernel I recommend postponing calling this function + * until the first open of the video device. Another reason for + * postponing it is that loading this firmware takes a long time (seconds) + * due to the slow i2c bus speed. So it will speed up the boot process if + * you can avoid loading the fw as long as the video device isn't used. + */ +static int cx25840_load_fw(struct v4l2_subdev *sd) +{ + struct cx25840_state *state = to_state(sd); + if (!state->is_initialized) { /* initialize and load firmware */ - state->is_initialized = 1; - if (is_cx2583x(state)) - cx25836_initialize(client); - else if (is_cx2388x(state)) - cx23885_initialize(client); - else if (is_cx231xx(state)) - cx231xx_initialize(client); - else - cx25840_initialize(client); + cx25840_reset(sd, 0); } return 0; } @@ -1937,22 +1951,6 @@ static int cx25840_s_tuner(struct v4l2_subdev *sd, const struct v4l2_tuner *vt) return 0; } -static int cx25840_reset(struct v4l2_subdev *sd, u32 val) -{ - struct cx25840_state *state = to_state(sd); - struct i2c_client *client = v4l2_get_subdevdata(sd); - - if (is_cx2583x(state)) - cx25836_initialize(client); - else if (is_cx2388x(state)) - cx23885_initialize(client); - else if (is_cx231xx(state)) - cx231xx_initialize(client); - else - cx25840_initialize(client); - return 0; -} - static int cx25840_log_status(struct v4l2_subdev *sd) { struct cx25840_state *state = to_state(sd); -- cgit v1.2.3-55-g7522