Instead of reinventing the wheel, use v4l2_find_nearest_size()
in order to get the closest resolution.
This should address a bug where the wrong resolution was
selected.
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@xxxxxxxxxx>
---
.../media/atomisp/i2c/atomisp-gc2235.c | 113 +++---------------
drivers/staging/media/atomisp/i2c/gc2235.h | 3 +-
2 files changed, 20 insertions(+), 96 deletions(-)
diff --git a/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c b/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
index 4d769590f2d3..5e7085264189 100644
--- a/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
+++ b/drivers/staging/media/atomisp/i2c/atomisp-gc2235.c
@@ -670,76 +670,6 @@ static int gc2235_s_power(struct v4l2_subdev *sd, int on)
return ret;
}
-/*
- * distance - calculate the distance
- * @res: resolution
- * @w: width
- * @h: height
- *
- * Get the gap between resolution and w/h.
- * res->width/height smaller than w/h wouldn't be considered.
- * Returns the value of gap or -1 if fail.
- */
-#define LARGEST_ALLOWED_RATIO_MISMATCH 800
-static int distance(struct gc2235_resolution *res, u32 w, u32 h)
-{
- unsigned int w_ratio = (res->width << 13) / w;
- unsigned int h_ratio;
- int match;
-
- if (h == 0)
- return -1;
- h_ratio = (res->height << 13) / h;
- if (h_ratio == 0)
- return -1;
- match = abs(((w_ratio << 13) / h_ratio) - 8192);
-
- if ((w_ratio < 8192) || (h_ratio < 8192) ||
- (match > LARGEST_ALLOWED_RATIO_MISMATCH))
- return -1;
-
- return w_ratio + h_ratio;
-}
-
-/* Return the nearest higher resolution index */
-static int nearest_resolution_index(int w, int h)
-{
- int i;
- int idx = -1;
- int dist;
- int min_dist = INT_MAX;
- struct gc2235_resolution *tmp_res = NULL;
-
- for (i = 0; i < N_RES; i++) {
- tmp_res = &gc2235_res[i];
- dist = distance(tmp_res, w, h);
- if (dist == -1)
- continue;
- if (dist < min_dist) {
- min_dist = dist;
- idx = i;
- }
- }
-
- return idx;
-}
-
-static int get_resolution_index(int w, int h)
-{
- int i;
-
- for (i = 0; i < N_RES; i++) {
- if (w != gc2235_res[i].width)
- continue;
- if (h != gc2235_res[i].height)
- continue;
-
- return i;
- }
-
- return -1;
-}
-
static int startup(struct v4l2_subdev *sd)
{
struct gc2235_device *dev = to_gc2235_sensor(sd);
@@ -758,7 +688,7 @@ static int startup(struct v4l2_subdev *sd)
gc2235_write_reg_array(client, gc2235_init_settings);
}
- ret = gc2235_write_reg_array(client, gc2235_res[dev->fmt_idx].regs);
+ ret = gc2235_write_reg_array(client, dev->res->regs);
if (ret) {
dev_err(&client->dev, "gc2235 write register err.\n");
return ret;
@@ -776,8 +706,8 @@ static int gc2235_set_fmt(struct v4l2_subdev *sd,
struct gc2235_device *dev = to_gc2235_sensor(sd);
struct i2c_client *client = v4l2_get_subdevdata(sd);
struct camera_mipi_info *gc2235_info = NULL;
+ struct gc2235_resolution *res;
int ret = 0;
- int idx;
gc2235_info = v4l2_get_subdev_hostdata(sd);
if (!gc2235_info)
@@ -786,16 +716,18 @@ static int gc2235_set_fmt(struct v4l2_subdev *sd,
return -EINVAL;
if (!fmt)
return -EINVAL;
+
mutex_lock(&dev->input_lock);
- idx = nearest_resolution_index(fmt->width, fmt->height);
- if (idx == -1) {
- /* return the largest resolution */
- fmt->width = gc2235_res[N_RES - 1].width;
- fmt->height = gc2235_res[N_RES - 1].height;
- } else {
- fmt->width = gc2235_res[idx].width;
- fmt->height = gc2235_res[idx].height;
- }
+ res = v4l2_find_nearest_size(gc2235_res_preview,
+ ARRAY_SIZE(gc2235_res_preview), width,
+ height, fmt->width, fmt->height);
+ if (!res)
+ res = &gc2235_res_preview[N_RES - 1];
+
+ fmt->width = res->width;
+ fmt->height = res->height;
+ dev->res = res;
+
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
if (format->which == V4L2_SUBDEV_FORMAT_TRY) {
sd_state->pads->try_fmt = *fmt;
@@ -803,13 +735,6 @@ static int gc2235_set_fmt(struct v4l2_subdev *sd,
return 0;
}
- dev->fmt_idx = get_resolution_index(fmt->width, fmt->height);
- if (dev->fmt_idx == -1) {
- dev_err(&client->dev, "get resolution fail\n");
- mutex_unlock(&dev->input_lock);
- return -EINVAL;
- }
-
ret = startup(sd);
if (ret) {
dev_err(&client->dev, "gc2235 startup err\n");
@@ -817,7 +742,7 @@ static int gc2235_set_fmt(struct v4l2_subdev *sd,
}
ret = gc2235_get_intg_factor(client, gc2235_info,
- &gc2235_res[dev->fmt_idx]);
+ dev->res);
if (ret)
dev_err(&client->dev, "failed to get integration_factor\n");
@@ -839,8 +764,8 @@ static int gc2235_get_fmt(struct v4l2_subdev *sd,
if (!fmt)
return -EINVAL;
- fmt->width = gc2235_res[dev->fmt_idx].width;
- fmt->height = gc2235_res[dev->fmt_idx].height;
+ fmt->width = dev->res->width;
+ fmt->height = dev->res->height;
fmt->code = MEDIA_BUS_FMT_SGRBG10_1X10;
return 0;
@@ -953,7 +878,7 @@ static int gc2235_g_frame_interval(struct v4l2_subdev *sd,
struct gc2235_device *dev = to_gc2235_sensor(sd);
interval->interval.numerator = 1;
- interval->interval.denominator = gc2235_res[dev->fmt_idx].fps;
+ interval->interval.denominator = dev->res->fps;
return 0;
}
@@ -991,7 +916,7 @@ static int gc2235_g_skip_frames(struct v4l2_subdev *sd, u32 *frames)
struct gc2235_device *dev = to_gc2235_sensor(sd);
mutex_lock(&dev->input_lock);
- *frames = gc2235_res[dev->fmt_idx].skip_frames;
+ *frames = dev->res->skip_frames;
mutex_unlock(&dev->input_lock);
return 0;
@@ -1055,7 +980,7 @@ static int gc2235_probe(struct i2c_client *client)
mutex_init(&dev->input_lock);
- dev->fmt_idx = 0;
+ dev->res = &gc2235_res_preview[0];
v4l2_i2c_subdev_init(&dev->sd, client, &gc2235_ops);
gcpdev = gmin_camera_platform_data(&dev->sd,
diff --git a/drivers/staging/media/atomisp/i2c/gc2235.h b/drivers/staging/media/atomisp/i2c/gc2235.h
index ba5db1230033..806be5dff7a5 100644
--- a/drivers/staging/media/atomisp/i2c/gc2235.h
+++ b/drivers/staging/media/atomisp/i2c/gc2235.h
@@ -158,11 +158,10 @@ struct gc2235_device {
struct v4l2_mbus_framefmt format;
struct mutex input_lock;
struct v4l2_ctrl_handler ctrl_handler;
+ struct gc2235_resolution *res;
struct camera_sensor_platform_data *platform_data;
int vt_pix_clk_freq_mhz;
- int fmt_idx;
- u8 res;
u8 type;
};
--
2.31.1
