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media: ov772x: reconstruct s_frame_interval() 

This splits the s_frame_interval() in subdev video ops into selecting the
frame interval and setting up the registers.

This is a preparatory change to avoid accessing registers under power
saving mode.

Cc: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Akinobu Mita <akinobu.mita@gmail.com>
Reviewed-by: Jacopo Mondi <jacopo+renesas@jmondi.org>
Signed-off-by: Sakari Ailus <sakari.ailus@linux.intel.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>
This commit is contained in:
Akinobu Mita 2018-05-06 10:19:25 -04:00 committed by Mauro Carvalho Chehab
parent 34af7d920b
commit 80dc2a49ba
1 changed files with 35 additions and 21 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

56
drivers/media/i2c/ov772x.c
View File

@ -617,25 +617,16 @@ static int ov772x_s_stream(struct v4l2_subdev *sd, int enable)
return 0;
}
static int ov772x_set_frame_rate(struct ov772x_priv *priv,
struct v4l2_fract *tpf,
const struct ov772x_color_format *cfmt,
const struct ov772x_win_size *win)
static unsigned int ov772x_select_fps(struct ov772x_priv *priv,
struct v4l2_fract *tpf)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
unsigned long fin = clk_get_rate(priv->clk);
unsigned int fps = tpf->numerator ?
tpf->denominator / tpf->numerator :
tpf->denominator;
unsigned int best_diff;
unsigned int fsize;
unsigned int pclk;
unsigned int diff;
unsigned int idx;
unsigned int i;
u8 clkrc = 0;
u8 com4 = 0;
int ret;
/* Approximate to the closest supported frame interval. */
best_diff = ~0L;
@ -646,7 +637,25 @@ static int ov772x_set_frame_rate(struct ov772x_priv *priv,
best_diff = diff;
}
}
fps = ov772x_frame_intervals[idx];
return ov772x_frame_intervals[idx];
}
static int ov772x_set_frame_rate(struct ov772x_priv *priv,
unsigned int fps,
const struct ov772x_color_format *cfmt,
const struct ov772x_win_size *win)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
unsigned long fin = clk_get_rate(priv->clk);
unsigned int best_diff;
unsigned int fsize;
unsigned int pclk;
unsigned int diff;
unsigned int i;
u8 clkrc = 0;
u8 com4 = 0;
int ret;
/* Use image size (with blankings) to calculate desired pixel clock. */
switch (cfmt->com7 & OFMT_MASK) {
@ -711,10 +720,6 @@ static int ov772x_set_frame_rate(struct ov772x_priv *priv,
if (ret < 0)
return ret;
tpf->numerator = 1;
tpf->denominator = fps;
priv->fps = tpf->denominator;
return 0;
}
@ -735,8 +740,20 @@ static int ov772x_s_frame_interval(struct v4l2_subdev *sd,
{
struct ov772x_priv *priv = to_ov772x(sd);
struct v4l2_fract *tpf = &ival->interval;
unsigned int fps;
int ret;
return ov772x_set_frame_rate(priv, tpf, priv->cfmt, priv->win);
fps = ov772x_select_fps(priv, tpf);
ret = ov772x_set_frame_rate(priv, fps, priv->cfmt, priv->win);
if (ret)
return ret;
tpf->numerator = 1;
tpf->denominator = fps;
priv->fps = fps;
return 0;
}
static int ov772x_s_ctrl(struct v4l2_ctrl *ctrl)
@ -993,7 +1010,6 @@ static int ov772x_set_params(struct ov772x_priv *priv,
const struct ov772x_win_size *win)
{
struct i2c_client *client = v4l2_get_subdevdata(&priv->subdev);
struct v4l2_fract tpf;
int ret;
u8 val;
@ -1075,9 +1091,7 @@ static int ov772x_set_params(struct ov772x_priv *priv,
goto ov772x_set_fmt_error;
/* COM4, CLKRC: Set pixel clock and framerate. */
tpf.numerator = 1;
tpf.denominator = priv->fps;
ret = ov772x_set_frame_rate(priv, &tpf, cfmt, win);
ret = ov772x_set_frame_rate(priv, priv->fps, cfmt, win);
if (ret < 0)
goto ov772x_set_fmt_error;