[PATCH v2 5/8] media: qcom: camss: Move format related functions

From: Gjorgji Rosikopulos
Date: Tue Mar 19 2024 - 13:41:39 EST

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From: Radoslav Tsvetkov <quic_rtsvetko@xxxxxxxxxxx>

Move out the format related helper functions from vfe and video in a
separate file. The goal here is to create a format API.

Signed-off-by: Radoslav Tsvetkov <quic_rtsvetko@xxxxxxxxxxx>
---
drivers/media/platform/qcom/camss/Makefile | 1 +
.../media/platform/qcom/camss/camss-format.c | 98 +++++++++++++++++++
.../media/platform/qcom/camss/camss-format.h | 5 +
drivers/media/platform/qcom/camss/camss-vfe.c | 86 +++++-----------
.../media/platform/qcom/camss/camss-video.c | 26 +----
5 files changed, 128 insertions(+), 88 deletions(-)
create mode 100644 drivers/media/platform/qcom/camss/camss-format.c

diff --git a/drivers/media/platform/qcom/camss/Makefile b/drivers/media/platform/qcom/camss/Makefile
index 0d4389ab312d..e636968a1126 100644
--- a/drivers/media/platform/qcom/camss/Makefile
+++ b/drivers/media/platform/qcom/camss/Makefile
@@ -19,5 +19,6 @@ qcom-camss-objs += \
camss-vfe-gen1.o \
camss-vfe.o \
camss-video.o \
+ camss-format.o \

obj-$(CONFIG_VIDEO_QCOM_CAMSS) += qcom-camss.o
diff --git a/drivers/media/platform/qcom/camss/camss-format.c b/drivers/media/platform/qcom/camss/camss-format.c
new file mode 100644
index 000000000000..6279cb099625
--- /dev/null
+++ b/drivers/media/platform/qcom/camss/camss-format.c
@@ -0,0 +1,98 @@
+// SPDX-License-Identifier: GPL-2.0-only
+/* Copyright (c) 2023, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023 Qualcomm Technologies, Inc.
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 and
+ * only version 2 as published by the Free Software Foundation.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ */
+
+#include <linux/bug.h>
+#include <linux/errno.h>
+
+#include "camss-format.h"
+
+/*
+ * camss_format_get_bpp - Map media bus format to bits per pixel
+ * @formats: supported media bus formats array
+ * @nformats: size of @formats array
+ * @code: media bus format code
+ *
+ * Return number of bits per pixel
+ */
+u8 camss_format_get_bpp(const struct camss_format_info *formats, unsigned int nformats, u32 code)
+{
+ unsigned int i;
+
+ for (i = 0; i < nformats; i++)
+ if (code == formats[i].code)
+ return formats[i].mbus_bpp;
+
+ WARN(1, "Unknown format\n");
+
+ return formats[0].mbus_bpp;
+}
+
+/*
+ * camss_format_find_code - Find a format code in an array
+ * @code: a pointer to media bus format codes array
+ * @n_code: size of @code array
+ * @index: index of code in the array
+ * @req_code: required code
+ *
+ * Return media bus format code
+ */
+u32 camss_format_find_code(u32 *code, unsigned int n_code, unsigned int index, u32 req_code)
+{
+ int i;
+
+ if (!req_code && index >= n_code)
+ return 0;
+
+ for (i = 0; i < n_code; i++) {
+ if (req_code) {
+ if (req_code == code[i])
+ return req_code;
+ } else {
+ if (i == index)
+ return code[i];
+ }
+ }
+
+ return code[0];
+}
+
+/*
+ * camss_format_find_format - Find a format in an array
+ * @code: media bus format code
+ * @pixelformat: V4L2 pixel format FCC identifier
+ * @formats: a pointer to formats array
+ * @nformats: size of @formats array
+ *
+ * Return index of a format or a negative error code otherwise
+ */
+int camss_format_find_format(u32 code, u32 pixelformat, const struct camss_format_info *formats,
+ unsigned int nformats)
+{
+ int i;
+
+ for (i = 0; i < nformats; i++) {
+ if (formats[i].code == code &&
+ formats[i].pixelformat == pixelformat)
+ return i;
+ }
+
+ for (i = 0; i < nformats; i++) {
+ if (formats[i].code == code)
+ return i;
+ }
+
+ WARN_ON(1);
+
+ return -EINVAL;
+}
diff --git a/drivers/media/platform/qcom/camss/camss-format.h b/drivers/media/platform/qcom/camss/camss-format.h
index bfbc761bd46c..86b5790e343d 100644
--- a/drivers/media/platform/qcom/camss/camss-format.h
+++ b/drivers/media/platform/qcom/camss/camss-format.h
@@ -59,4 +59,9 @@ struct camss_formats {
const struct camss_format_info *formats;
};

+u8 camss_format_get_bpp(const struct camss_format_info *formats, unsigned int nformats, u32 code);
+u32 camss_format_find_code(u32 *code, unsigned int n_code, unsigned int index, u32 req_code);
+int camss_format_find_format(u32 code, u32 pixelformat, const struct camss_format_info *formats,
+ unsigned int nformats);
+
#endif /* __CAMSS_FORMAT_H__ */
diff --git a/drivers/media/platform/qcom/camss/camss-vfe.c b/drivers/media/platform/qcom/camss/camss-vfe.c
index 2d5a64c055f1..83c5a36d071f 100644
--- a/drivers/media/platform/qcom/camss/camss-vfe.c
+++ b/drivers/media/platform/qcom/camss/camss-vfe.c
@@ -278,48 +278,6 @@ const struct camss_formats vfe_formats_pix_845 = {
.formats = formats_rdi_845
};

-/*
- * vfe_get_bpp - map media bus format to bits per pixel
- * @formats: supported media bus formats array
- * @nformats: size of @formats array
- * @code: media bus format code
- *
- * Return number of bits per pixel
- */
-static u8 vfe_get_bpp(const struct camss_format_info *formats,
- unsigned int nformats, u32 code)
-{
- unsigned int i;
-
- for (i = 0; i < nformats; i++)
- if (code == formats[i].code)
- return formats[i].mbus_bpp;
-
- WARN(1, "Unknown format\n");
-
- return formats[0].mbus_bpp;
-}
-
-static u32 vfe_find_code(u32 *code, unsigned int n_code,
- unsigned int index, u32 req_code)
-{
- int i;
-
- if (!req_code && (index >= n_code))
- return 0;
-
- for (i = 0; i < n_code; i++)
- if (req_code) {
- if (req_code == code[i])
- return req_code;
- } else {
- if (i == index)
- return code[i];
- }
-
- return code[0];
-}
-
static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
unsigned int index, u32 src_req_code)
{
@@ -335,8 +293,8 @@ static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
MEDIA_BUS_FMT_YUYV8_1_5X8,
};

- return vfe_find_code(src_code, ARRAY_SIZE(src_code),
- index, src_req_code);
+ return camss_format_find_code(src_code, ARRAY_SIZE(src_code),
+ index, src_req_code);
}
case MEDIA_BUS_FMT_YVYU8_1X16:
{
@@ -345,8 +303,8 @@ static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
MEDIA_BUS_FMT_YVYU8_1_5X8,
};

- return vfe_find_code(src_code, ARRAY_SIZE(src_code),
- index, src_req_code);
+ return camss_format_find_code(src_code, ARRAY_SIZE(src_code),
+ index, src_req_code);
}
case MEDIA_BUS_FMT_UYVY8_1X16:
{
@@ -355,8 +313,8 @@ static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
MEDIA_BUS_FMT_UYVY8_1_5X8,
};

- return vfe_find_code(src_code, ARRAY_SIZE(src_code),
- index, src_req_code);
+ return camss_format_find_code(src_code, ARRAY_SIZE(src_code),
+ index, src_req_code);
}
case MEDIA_BUS_FMT_VYUY8_1X16:
{
@@ -365,8 +323,8 @@ static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
MEDIA_BUS_FMT_VYUY8_1_5X8,
};

- return vfe_find_code(src_code, ARRAY_SIZE(src_code),
- index, src_req_code);
+ return camss_format_find_code(src_code, ARRAY_SIZE(src_code),
+ index, src_req_code);
}
default:
if (index > 0)
@@ -391,8 +349,8 @@ static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
MEDIA_BUS_FMT_YUYV8_1_5X8,
};

- return vfe_find_code(src_code, ARRAY_SIZE(src_code),
- index, src_req_code);
+ return camss_format_find_code(src_code, ARRAY_SIZE(src_code),
+ index, src_req_code);
}
case MEDIA_BUS_FMT_YVYU8_1X16:
{
@@ -404,8 +362,8 @@ static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
MEDIA_BUS_FMT_YVYU8_1_5X8,
};

- return vfe_find_code(src_code, ARRAY_SIZE(src_code),
- index, src_req_code);
+ return camss_format_find_code(src_code, ARRAY_SIZE(src_code),
+ index, src_req_code);
}
case MEDIA_BUS_FMT_UYVY8_1X16:
{
@@ -417,8 +375,8 @@ static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
MEDIA_BUS_FMT_UYVY8_1_5X8,
};

- return vfe_find_code(src_code, ARRAY_SIZE(src_code),
- index, src_req_code);
+ return camss_format_find_code(src_code, ARRAY_SIZE(src_code),
+ index, src_req_code);
}
case MEDIA_BUS_FMT_VYUY8_1X16:
{
@@ -430,8 +388,8 @@ static u32 vfe_src_pad_code(struct vfe_line *line, u32 sink_code,
MEDIA_BUS_FMT_VYUY8_1_5X8,
};

- return vfe_find_code(src_code, ARRAY_SIZE(src_code),
- index, src_req_code);
+ return camss_format_find_code(src_code, ARRAY_SIZE(src_code),
+ index, src_req_code);
}
default:
if (index > 0)
@@ -714,9 +672,9 @@ static int vfe_set_clock_rates(struct vfe_device *vfe)
} else {
struct vfe_line *l = &vfe->line[j];

- bpp = vfe_get_bpp(l->formats,
- l->nformats,
- l->fmt[MSM_VFE_PAD_SINK].code);
+ bpp = camss_format_get_bpp(l->formats,
+ l->nformats,
+ l->fmt[MSM_VFE_PAD_SINK].code);
tmp = pixel_clock[j] * bpp / 64;
}

@@ -795,9 +753,9 @@ static int vfe_check_clock_rates(struct vfe_device *vfe)
} else {
struct vfe_line *l = &vfe->line[j];

- bpp = vfe_get_bpp(l->formats,
- l->nformats,
- l->fmt[MSM_VFE_PAD_SINK].code);
+ bpp = camss_format_get_bpp(l->formats,
+ l->nformats,
+ l->fmt[MSM_VFE_PAD_SINK].code);
tmp = pixel_clock[j] * bpp / 64;
}

diff --git a/drivers/media/platform/qcom/camss/camss-video.c b/drivers/media/platform/qcom/camss/camss-video.c
index cd13a432e291..00b10dda3615 100644
--- a/drivers/media/platform/qcom/camss/camss-video.c
+++ b/drivers/media/platform/qcom/camss/camss-video.c
@@ -28,27 +28,6 @@
* Helper functions
*/

-static int video_find_format(u32 code, u32 pixelformat,
- const struct camss_format_info *formats,
- unsigned int nformats)
-{
- int i;
-
- for (i = 0; i < nformats; i++) {
- if (formats[i].code == code &&
- formats[i].pixelformat == pixelformat)
- return i;
- }
-
- for (i = 0; i < nformats; i++)
- if (formats[i].code == code)
- return i;
-
- WARN_ON(1);
-
- return -EINVAL;
-}
-
/*
* video_mbus_to_pix_mp - Convert v4l2_mbus_framefmt to v4l2_pix_format_mplane
* @mbus: v4l2_mbus_framefmt format (input)
@@ -121,9 +100,8 @@ static int video_get_subdev_format(struct camss_video *video,
if (ret)
return ret;

- ret = video_find_format(fmt.format.code,
- format->fmt.pix_mp.pixelformat,
- video->formats, video->nformats);
+ ret = camss_format_find_format(fmt.format.code, format->fmt.pix_mp.pixelformat,
+ video->formats, video->nformats);
if (ret < 0)
return ret;

--
2.17.1

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