media: qcom: camss: Move format related functions

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@quicinc.com>
Signed-off-by: Gjorgji Rosikopulos <quic_grosikop@quicinc.com>
Acked-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

5 files changed, 121 insertions, 88 deletions

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..4a3d5549615c
--- /dev/null
+++ b/drivers/media/platform/qcom/camss/camss-format.c
@@ -0,0 +1,91 @@
+// SPDX-License-Identifier: GPL-2.0
+/*
+ * camss-format.c
+ *
+ * Qualcomm MSM Camera Subsystem - Format helpers
+ *
+ * Copyright (c) 2023, The Linux Foundation. All rights reserved.
+ * Copyright (c) 2023 Qualcomm Technologies, Inc.
+ */
+#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)
+{
+	unsigned 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)
+{
+	unsigned 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;
+	}
+
+	return -EINVAL;
+}
diff --git a/drivers/media/platform/qcom/camss/camss-format.h b/drivers/media/platform/qcom/camss/camss-format.h
index e0231ca6a5ca..923a48c9c3fb 100644
--- a/drivers/media/platform/qcom/camss/camss-format.h
+++ b/drivers/media/platform/qcom/camss/camss-format.h
@@ -54,4 +54,9 @@ 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 2fe706838469..cd72feca618c 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;