@@ -118,8 +118,10 @@ crop_and_interpolate(unsigned int cropped_width,
int ty, src_y0, src_y1;
unsigned int sy0, sy1, dy0, dy1, divy;
- /* calculate target point and make sure it falls within
- the table */
+ /*
+ * calculate target point and make sure it falls within
+ * the table
+ */
ty = out_start_row + i * out_cell_size;
/* calculate closest source points in shading table and
@@ -166,19 +168,24 @@ crop_and_interpolate(unsigned int cropped_width,
src_x1 = clamp(src_x1, 0, (int)table_width - 1);
tx = min(clamp(tx, 0, (int)sensor_width - 1),
(int)table_cell_w);
- /* calculate closest source points for distance
- computation */
+ /*
+ * calculate closest source points for distance
+ * computation
+ */
sx0 = min(src_x0 * in_cell_size, sensor_width - 1);
sx1 = min(src_x1 * in_cell_size, sensor_width - 1);
- /* calculate distances between source and target
- pixels */
+ /*
+ * calculate distances between source and target
+ * pixels
+ */
dx0 = tx - sx0;
dx1 = sx1 - tx;
divx = sx1 - sx0;
/* if we're at the edge, we just use the closest
- point still in the grid. We make up for the divider
- in this case by setting the distance to
- out_cell_size, since it's actually 0. */
+ * point still in the grid. We make up for the divider
+ * in this case by setting the distance to
+ * out_cell_size, since it's actually 0.
+ */
if (divx == 0) {
dx0 = 1;
divx = 1;
@@ -271,14 +278,26 @@ prepare_shading_table(const struct ia_css_shading_table *in_table,
bds_denominator -
binary->info->sp.pipeline.top_cropping;
+ /*
+ * We take into account the binning done by the sensor. We do this
+ * by cropping the non-binned part of the shading table and then
+ * increasing the size of a grid cell with this same binning factor.
+ */
input_width *= sensor_binning;
input_height *= sensor_binning;
+ /*
+ * We also scale the padding by the same binning factor. This will
+ * make it much easier later on to calculate the padding of the
+ * shading table.
+ */
left_padding *= sensor_binning;
right_padding *= sensor_binning;
top_padding *= sensor_binning;
- /* during simulation, the used resolution can exceed the sensor
- resolution, so we clip it. */
+ /*
+ * during simulation, the used resolution can exceed the sensor
+ * resolution, so we clip it.
+ */
input_width = min(input_width, in_table->sensor_width);
input_height = min(input_height, in_table->sensor_height);
@@ -296,8 +315,10 @@ prepare_shading_table(const struct ia_css_shading_table *in_table,
result->sensor_height = in_table->sensor_height;
result->fraction_bits = in_table->fraction_bits;
- /* now we crop the original shading table and then interpolate to the
- requested resolution and decimation factor. */
+ /*
+ * now we crop the original shading table and then interpolate to the
+ * requested resolution and decimation factor.
+ */
for (i = 0; i < IA_CSS_SC_NUM_COLORS; i++) {
crop_and_interpolate(input_width, input_height,
left_padding, right_padding, top_padding,
@@ -354,9 +375,10 @@ ia_css_shading_table_free(struct ia_css_shading_table *table)
if (!table)
return;
- /* We only output logging when the table is not NULL, otherwise
+ /*
+ * We only output logging when the table is not NULL, otherwise
* logs will give the impression that a table was freed.
- * */
+ */
IA_CSS_ENTER("");
for (i = 0; i < IA_CSS_SC_NUM_COLORS; i++) {
The comments are not following Kernel coding style. Also, there are two missing comments that are found at the Intel Aero device driver code. Add them. No functional changes. Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org> --- To avoid mailbombing on a large number of people, only mailing lists were C/C on the cover. See [PATCH 00/13] at: https://lore.kernel.org/all/cover.1637140900.git.mchehab+huawei@kernel.org/ .../media/atomisp/pci/sh_css_param_shading.c | 52 +++++++++++++------ 1 file changed, 37 insertions(+), 15 deletions(-)