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Date: Mon, 21 Nov 2022 14:21:30 +0100
From: Hans de Goede <hdegoede@...hat.com>
To: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>,
linux-media@...r.kernel.org, linux-staging@...ts.linux.dev,
linux-kernel@...r.kernel.org
Cc: Mauro Carvalho Chehab <mchehab@...nel.org>,
Sakari Ailus <sakari.ailus@...ux.intel.com>,
Greg Kroah-Hartman <gregkh@...uxfoundation.org>
Subject: Re: [PATCH v1 1/1] atomisp: Make bds_factors_list be type of struct
u32_fract
Hi,
On 11/18/22 19:43, Andy Shevchenko wrote:
> The list contains the Bayer scale index, and rational fraction of it.
> The struct u32_fract is suitable type to hold that. Convert the driver
> to use latter instead of former.
>
> Signed-off-by: Andy Shevchenko <andriy.shevchenko@...ux.intel.com>
Thanks, patch looks good to me:
Reviewed-by: Hans de Goede <hdegoede@...hat.com>
I've added this to my media-atomisp branch now and will
include this in the pull-req which I will send to Mauro after I've
run some quick tests (tonight or tomorrow).
Regards,
Hans
> ---
> .../pipe/interface/ia_css_pipe_binarydesc.h | 13 ++---
> .../pci/camera/pipe/src/pipe_binarydesc.c | 55 ++++++++-----------
> .../atomisp/pci/runtime/binary/src/binary.c | 42 +++++---------
> .../media/atomisp/pci/sh_css_param_shading.c | 19 +++----
> 4 files changed, 51 insertions(+), 78 deletions(-)
>
> diff --git a/drivers/staging/media/atomisp/pci/camera/pipe/interface/ia_css_pipe_binarydesc.h b/drivers/staging/media/atomisp/pci/camera/pipe/interface/ia_css_pipe_binarydesc.h
> index 965cfda50707..e42eeaeb3ee4 100644
> --- a/drivers/staging/media/atomisp/pci/camera/pipe/interface/ia_css_pipe_binarydesc.h
> +++ b/drivers/staging/media/atomisp/pci/camera/pipe/interface/ia_css_pipe_binarydesc.h
> @@ -16,6 +16,8 @@
> #ifndef __IA_CSS_PIPE_BINARYDESC_H__
> #define __IA_CSS_PIPE_BINARYDESC_H__
>
> +#include <linux/math.h>
> +
> #include <ia_css_types.h> /* ia_css_pipe */
> #include <ia_css_frame_public.h> /* ia_css_frame_info */
> #include <ia_css_binary.h> /* ia_css_binary_descr */
> @@ -56,17 +58,12 @@ void ia_css_pipe_get_vfpp_binarydesc(
> *
> * @param[in] bds_factor: The bayer downscaling factor.
> * (= The bds_factor member in the sh_css_bds_factor structure.)
> - * @param[out] bds_factor_numerator: The numerator of the bayer downscaling factor.
> - * (= The numerator member in the sh_css_bds_factor structure.)
> - * @param[out] bds_factor_denominator: The denominator of the bayer downscaling factor.
> - * (= The denominator member in the sh_css_bds_factor structure.)
> + * @param[out] bds: The rational fraction of the bayer downscaling factor.
> + * (= The respective member in the sh_css_bds_factor structure.)
> * @return 0 or error code upon error.
> *
> */
> -int sh_css_bds_factor_get_numerator_denominator(
> - unsigned int bds_factor,
> - unsigned int *bds_factor_numerator,
> - unsigned int *bds_factor_denominator);
> +int sh_css_bds_factor_get_fract(unsigned int bds_factor, struct u32_fract *bds);
>
> /* @brief Get a binary descriptor for preview stage.
> *
> diff --git a/drivers/staging/media/atomisp/pci/camera/pipe/src/pipe_binarydesc.c b/drivers/staging/media/atomisp/pci/camera/pipe/src/pipe_binarydesc.c
> index 7dd0e4a53c8b..06664ce75b60 100644
> --- a/drivers/staging/media/atomisp/pci/camera/pipe/src/pipe_binarydesc.c
> +++ b/drivers/staging/media/atomisp/pci/camera/pipe/src/pipe_binarydesc.c
> @@ -13,6 +13,9 @@
> * more details.
> */
>
> +#include <linux/kernel.h>
> +#include <linux/math.h>
> +
> #include "ia_css_pipe_binarydesc.h"
> #include "ia_css_frame_format.h"
> #include "ia_css_pipe.h"
> @@ -23,7 +26,6 @@
> #include <assert_support.h>
> /* HRT_GDC_N */
> #include "gdc_device.h"
> -#include <linux/kernel.h>
>
> /* This module provides a binary descriptions to used to find a binary. Since,
> * every stage is associated with a binary, it implicity helps stage
> @@ -126,40 +128,29 @@ void ia_css_pipe_get_vfpp_binarydesc(
> IA_CSS_LEAVE_PRIVATE("");
> }
>
> -static struct sh_css_bds_factor bds_factors_list[] = {
> - {1, 1, SH_CSS_BDS_FACTOR_1_00},
> - {5, 4, SH_CSS_BDS_FACTOR_1_25},
> - {3, 2, SH_CSS_BDS_FACTOR_1_50},
> - {2, 1, SH_CSS_BDS_FACTOR_2_00},
> - {9, 4, SH_CSS_BDS_FACTOR_2_25},
> - {5, 2, SH_CSS_BDS_FACTOR_2_50},
> - {3, 1, SH_CSS_BDS_FACTOR_3_00},
> - {4, 1, SH_CSS_BDS_FACTOR_4_00},
> - {9, 2, SH_CSS_BDS_FACTOR_4_50},
> - {5, 1, SH_CSS_BDS_FACTOR_5_00},
> - {6, 1, SH_CSS_BDS_FACTOR_6_00},
> - {8, 1, SH_CSS_BDS_FACTOR_8_00}
> +static struct u32_fract bds_factors_list[] = {
> + [SH_CSS_BDS_FACTOR_1_00] = {1, 1},
> + [SH_CSS_BDS_FACTOR_1_25] = {5, 4},
> + [SH_CSS_BDS_FACTOR_1_50] = {3, 2},
> + [SH_CSS_BDS_FACTOR_2_00] = {2, 1},
> + [SH_CSS_BDS_FACTOR_2_25] = {9, 4},
> + [SH_CSS_BDS_FACTOR_2_50] = {5, 2},
> + [SH_CSS_BDS_FACTOR_3_00] = {3, 1},
> + [SH_CSS_BDS_FACTOR_4_00] = {4, 1},
> + [SH_CSS_BDS_FACTOR_4_50] = {9, 2},
> + [SH_CSS_BDS_FACTOR_5_00] = {5, 1},
> + [SH_CSS_BDS_FACTOR_6_00] = {6, 1},
> + [SH_CSS_BDS_FACTOR_8_00] = {8, 1},
> };
>
> -int sh_css_bds_factor_get_numerator_denominator(
> - unsigned int bds_factor,
> - unsigned int *bds_factor_numerator,
> - unsigned int *bds_factor_denominator)
> +int sh_css_bds_factor_get_fract(unsigned int bds_factor, struct u32_fract *bds)
> {
> - unsigned int i;
> -
> - /* Loop over all bds factors until a match is found */
> - for (i = 0; i < ARRAY_SIZE(bds_factors_list); i++) {
> - if (bds_factors_list[i].bds_factor == bds_factor) {
> - *bds_factor_numerator = bds_factors_list[i].numerator;
> - *bds_factor_denominator = bds_factors_list[i].denominator;
> - return 0;
> - }
> - }
> + /* Throw an error since bds_factor cannot be found in bds_factors_list */
> + if (bds_factor >= ARRAY_SIZE(bds_factors_list))
> + return -EINVAL;
>
> - /* Throw an error since bds_factor cannot be found
> - in bds_factors_list */
> - return -EINVAL;
> + *bds = bds_factors_list[bds_factor];
> + return 0;
> }
>
> int binarydesc_calculate_bds_factor(
> @@ -194,7 +185,7 @@ int binarydesc_calculate_bds_factor(
> (out_h * num / den <= in_h);
>
> if (cond) {
> - *bds_factor = bds_factors_list[i].bds_factor;
> + *bds_factor = i;
> return 0;
> }
> }
> diff --git a/drivers/staging/media/atomisp/pci/runtime/binary/src/binary.c b/drivers/staging/media/atomisp/pci/runtime/binary/src/binary.c
> index 406ed5fb4c6a..768da86b8c2c 100644
> --- a/drivers/staging/media/atomisp/pci/runtime/binary/src/binary.c
> +++ b/drivers/staging/media/atomisp/pci/runtime/binary/src/binary.c
> @@ -13,6 +13,8 @@
> * more details.
> */
>
> +#include <linux/math.h>
> +
> #include <math_support.h>
> #include <gdc_device.h> /* HR_GDC_N */
>
> @@ -128,16 +130,8 @@ ia_css_binary_compute_shading_table_bayer_origin(
> {
> int err;
>
> - /* Numerator and denominator of the fixed bayer downscaling factor.
> - (numerator >= denominator) */
> - unsigned int bds_num, bds_den;
> -
> - /* Horizontal/Vertical ratio of bayer scaling
> - between input area and output area. */
> - unsigned int bs_hor_ratio_in;
> - unsigned int bs_hor_ratio_out;
> - unsigned int bs_ver_ratio_in;
> - unsigned int bs_ver_ratio_out;
> + /* Rational fraction of the fixed bayer downscaling factor. */
> + struct u32_fract bds;
>
> /* Left padding set by InputFormatter. */
> unsigned int left_padding_bqs; /* in bqs */
> @@ -158,19 +152,11 @@ ia_css_binary_compute_shading_table_bayer_origin(
> unsigned int bad_bqs_on_top_before_bs; /* in bqs */
> unsigned int bad_bqs_on_top_after_bs; /* in bqs */
>
> - /* Get the numerator and denominator of bayer downscaling factor. */
> - err = sh_css_bds_factor_get_numerator_denominator
> - (required_bds_factor, &bds_num, &bds_den);
> + /* Get the rational fraction of bayer downscaling factor. */
> + err = sh_css_bds_factor_get_fract(required_bds_factor, &bds);
> if (err)
> return err;
>
> - /* Set the horizontal/vertical ratio of bayer scaling
> - between input area and output area. */
> - bs_hor_ratio_in = bds_num;
> - bs_hor_ratio_out = bds_den;
> - bs_ver_ratio_in = bds_num;
> - bs_ver_ratio_out = bds_den;
> -
> /* Set the left padding set by InputFormatter. (ifmtr.c) */
> if (stream_config->left_padding == -1)
> left_padding_bqs = _ISP_BQS(binary->left_padding);
> @@ -228,18 +214,18 @@ ia_css_binary_compute_shading_table_bayer_origin(
> located on the shading table during the shading correction. */
> res->sc_bayer_origin_x_bqs_on_shading_table =
> ((left_padding_adjusted_bqs + bad_bqs_on_left_before_bs)
> - * bs_hor_ratio_out + bs_hor_ratio_in / 2) / bs_hor_ratio_in
> + * bds.denominator + bds.numerator / 2) / bds.numerator
> + bad_bqs_on_left_after_bs;
> - /* "+ bs_hor_ratio_in/2": rounding for division by bs_hor_ratio_in */
> + /* "+ bds.numerator / 2": rounding for division by bds.numerator */
> res->sc_bayer_origin_y_bqs_on_shading_table =
> - (bad_bqs_on_top_before_bs * bs_ver_ratio_out + bs_ver_ratio_in / 2) / bs_ver_ratio_in
> + (bad_bqs_on_top_before_bs * bds.denominator + bds.numerator / 2) / bds.numerator
> + bad_bqs_on_top_after_bs;
> - /* "+ bs_ver_ratio_in/2": rounding for division by bs_ver_ratio_in */
> + /* "+ bds.numerator / 2": rounding for division by bds.numerator */
>
> - res->bayer_scale_hor_ratio_in = (uint32_t)bs_hor_ratio_in;
> - res->bayer_scale_hor_ratio_out = (uint32_t)bs_hor_ratio_out;
> - res->bayer_scale_ver_ratio_in = (uint32_t)bs_ver_ratio_in;
> - res->bayer_scale_ver_ratio_out = (uint32_t)bs_ver_ratio_out;
> + res->bayer_scale_hor_ratio_in = bds.numerator;
> + res->bayer_scale_hor_ratio_out = bds.denominator;
> + res->bayer_scale_ver_ratio_in = bds.numerator;
> + res->bayer_scale_ver_ratio_out = bds.denominator;
>
> return err;
> }
> diff --git a/drivers/staging/media/atomisp/pci/sh_css_param_shading.c b/drivers/staging/media/atomisp/pci/sh_css_param_shading.c
> index 41a4c9162319..5b43cc656269 100644
> --- a/drivers/staging/media/atomisp/pci/sh_css_param_shading.c
> +++ b/drivers/staging/media/atomisp/pci/sh_css_param_shading.c
> @@ -13,6 +13,7 @@
> * more details.
> */
>
> +#include <linux/math.h>
> #include <linux/slab.h>
>
> #include <math_support.h>
> @@ -239,10 +240,9 @@ prepare_shading_table(const struct ia_css_shading_table *in_table,
> {
> unsigned int input_width, input_height, table_width, table_height, i;
> unsigned int left_padding, top_padding, left_cropping;
> - unsigned int bds_numerator, bds_denominator;
> - int right_padding;
> -
> struct ia_css_shading_table *result;
> + struct u32_fract bds;
> + int right_padding;
>
> assert(target_table);
> assert(binary);
> @@ -265,17 +265,16 @@ prepare_shading_table(const struct ia_css_shading_table *in_table,
> left_cropping = (binary->info->sp.pipeline.left_cropping == 0) ?
> binary->dvs_envelope.width : 2 * ISP_VEC_NELEMS;
>
> - sh_css_bds_factor_get_numerator_denominator
> - (bds_factor, &bds_numerator, &bds_denominator);
> + sh_css_bds_factor_get_fract(bds_factor, &bds);
>
> left_padding = (left_padding + binary->info->sp.pipeline.left_cropping) *
> - bds_numerator / bds_denominator -
> + bds.numerator / bds.denominator -
> binary->info->sp.pipeline.left_cropping;
> right_padding = (binary->internal_frame_info.res.width -
> - binary->effective_in_frame_res.width * bds_denominator /
> - bds_numerator - left_cropping) * bds_numerator / bds_denominator;
> - top_padding = binary->info->sp.pipeline.top_cropping * bds_numerator /
> - bds_denominator -
> + binary->effective_in_frame_res.width * bds.denominator /
> + bds.numerator - left_cropping) * bds.numerator / bds.denominator;
> + top_padding = binary->info->sp.pipeline.top_cropping * bds.numerator /
> + bds.denominator -
> binary->info->sp.pipeline.top_cropping;
>
> /*
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