bcm27xx: add support for linux v5.15

Build system: x86_64
Build-tested: bcm2708, bcm2709, bcm2710, bcm2711
Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B

Signed-off-by: Marty Jones <mj8263788@gmail.com>
Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>

1 files changed, 286 insertions, 0 deletions

diff --git a/target/linux/bcm27xx/patches-5.15/950-0817-media-i2c-imx258-Add-support-for-24MHz-clock.patch b/target/linux/bcm27xx/patches-5.15/950-0817-media-i2c-imx258-Add-support-for-24MHz-clock.patch
new file mode 100644
index 0000000000..35df2d7cbb
--- /dev/null
+++ b/target/linux/bcm27xx/patches-5.15/950-0817-media-i2c-imx258-Add-support-for-24MHz-clock.patch
@@ -0,0 +1,286 @@
+From 08f30518ef7619a6d24b39c367bffb30ebf7196d Mon Sep 17 00:00:00 2001
+From: Dave Stevenson <dave.stevenson@raspberrypi.com>
+Date: Wed, 16 Jun 2021 13:08:00 +0100
+Subject: [PATCH] media: i2c: imx258: Add support for 24MHz clock
+
+There's no reason why the clock must be 19.2MHz and nothing
+else (indeed this isn't even a frequency listed in the datasheet),
+so add support for 24MHz as well.
+The PLL settings result in slightly different link frequencies,
+so parameterise those.
+
+Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
+---
+ drivers/media/i2c/imx258.c | 141 +++++++++++++++++++++++++++++--------
+ 1 file changed, 111 insertions(+), 30 deletions(-)
+
+--- a/drivers/media/i2c/imx258.c
++++ b/drivers/media/i2c/imx258.c
+@@ -77,9 +77,6 @@
+ #define REG_CONFIG_MIRROR_VFLIP		0x02
+ #define REG_CONFIG_FLIP_TEST_PATTERN	0x02
+ 
+-/* Input clock frequency in Hz */
+-#define IMX258_INPUT_CLOCK_FREQ		19200000
+-
+ struct imx258_reg {
+ 	u16 address;
+ 	u8 val;
+@@ -92,6 +89,7 @@ struct imx258_reg_list {
+ 
+ /* Link frequency config */
+ struct imx258_link_freq_config {
++	u64 link_frequency;
+ 	u32 pixels_per_line;
+ 
+ 	/* PLL registers for this link frequency */
+@@ -116,7 +114,9 @@ struct imx258_mode {
+ };
+ 
+ /* 4208x3120 needs 1267Mbps/lane, 4 lanes */
+-static const struct imx258_reg mipi_data_rate_1267mbps[] = {
++static const struct imx258_reg mipi_1267mbps_19_2mhz[] = {
++	{ 0x0136, 0x13 },
++	{ 0x0137, 0x33 },
+ 	{ 0x0301, 0x05 },
+ 	{ 0x0303, 0x02 },
+ 	{ 0x0305, 0x03 },
+@@ -134,7 +134,29 @@ static const struct imx258_reg mipi_data
+ 	{ 0x0823, 0xCC },
+ };
+ 
+-static const struct imx258_reg mipi_data_rate_640mbps[] = {
++static const struct imx258_reg mipi_1272mbps_24mhz[] = {
++	{ 0x0136, 0x18 },
++	{ 0x0137, 0x00 },
++	{ 0x0301, 0x05 },
++	{ 0x0303, 0x02 },
++	{ 0x0305, 0x04 },
++	{ 0x0306, 0x00 },
++	{ 0x0307, 0xD4 },
++	{ 0x0309, 0x0A },
++	{ 0x030B, 0x01 },
++	{ 0x030D, 0x02 },
++	{ 0x030E, 0x00 },
++	{ 0x030F, 0xD8 },
++	{ 0x0310, 0x00 },
++	{ 0x0820, 0x13 },
++	{ 0x0821, 0x4C },
++	{ 0x0822, 0xCC },
++	{ 0x0823, 0xCC },
++};
++
++static const struct imx258_reg mipi_640mbps_19_2mhz[] = {
++	{ 0x0136, 0x13 },
++	{ 0x0137, 0x33 },
+ 	{ 0x0301, 0x05 },
+ 	{ 0x0303, 0x02 },
+ 	{ 0x0305, 0x03 },
+@@ -152,9 +174,27 @@ static const struct imx258_reg mipi_data
+ 	{ 0x0823, 0x00 },
+ };
+ 
++static const struct imx258_reg mipi_642mbps_24mhz[] = {
++	{ 0x0136, 0x18 },
++	{ 0x0137, 0x00 },
++	{ 0x0301, 0x05 },
++	{ 0x0303, 0x02 },
++	{ 0x0305, 0x04 },
++	{ 0x0306, 0x00 },
++	{ 0x0307, 0x6B },
++	{ 0x0309, 0x0A },
++	{ 0x030B, 0x01 },
++	{ 0x030D, 0x02 },
++	{ 0x030E, 0x00 },
++	{ 0x030F, 0xD8 },
++	{ 0x0310, 0x00 },
++	{ 0x0820, 0x0A },
++	{ 0x0821, 0x00 },
++	{ 0x0822, 0x00 },
++	{ 0x0823, 0x00 },
++};
++
+ static const struct imx258_reg mode_4208x3120_regs[] = {
+-	{ 0x0136, 0x13 },
+-	{ 0x0137, 0x33 },
+ 	{ 0x3051, 0x00 },
+ 	{ 0x3052, 0x00 },
+ 	{ 0x4E21, 0x14 },
+@@ -268,8 +308,6 @@ static const struct imx258_reg mode_4208
+ };
+ 
+ static const struct imx258_reg mode_2104_1560_regs[] = {
+-	{ 0x0136, 0x13 },
+-	{ 0x0137, 0x33 },
+ 	{ 0x3051, 0x00 },
+ 	{ 0x3052, 0x00 },
+ 	{ 0x4E21, 0x14 },
+@@ -383,8 +421,6 @@ static const struct imx258_reg mode_2104
+ };
+ 
+ static const struct imx258_reg mode_1048_780_regs[] = {
+-	{ 0x0136, 0x13 },
+-	{ 0x0137, 0x33 },
+ 	{ 0x3051, 0x00 },
+ 	{ 0x3052, 0x00 },
+ 	{ 0x4E21, 0x14 },
+@@ -531,10 +567,6 @@ static const char * const imx258_supply_
+ 
+ #define IMX258_NUM_SUPPLIES ARRAY_SIZE(imx258_supply_name)
+ 
+-/* Configurations for supported link frequencies */
+-#define IMX258_LINK_FREQ_634MHZ	633600000ULL
+-#define IMX258_LINK_FREQ_320MHZ	320000000ULL
+-
+ enum {
+ 	IMX258_LINK_FREQ_1267MBPS,
+ 	IMX258_LINK_FREQ_640MBPS,
+@@ -553,25 +585,55 @@ static u64 link_freq_to_pixel_rate(u64 f
+ }
+ 
+ /* Menu items for LINK_FREQ V4L2 control */
+-static const s64 link_freq_menu_items[] = {
++/* Configurations for supported link frequencies */
++#define IMX258_LINK_FREQ_634MHZ	633600000ULL
++#define IMX258_LINK_FREQ_320MHZ	320000000ULL
++
++static const s64 link_freq_menu_items_19_2[] = {
+ 	IMX258_LINK_FREQ_634MHZ,
+ 	IMX258_LINK_FREQ_320MHZ,
+ };
+ 
++/* Configurations for supported link frequencies */
++#define IMX258_LINK_FREQ_636MHZ	636000000ULL
++#define IMX258_LINK_FREQ_321MHZ	321000000ULL
++
++static const s64 link_freq_menu_items_24[] = {
++	IMX258_LINK_FREQ_636MHZ,
++	IMX258_LINK_FREQ_321MHZ,
++};
++
+ /* Link frequency configs */
+-static const struct imx258_link_freq_config link_freq_configs[] = {
++static const struct imx258_link_freq_config link_freq_configs_19_2[] = {
++	[IMX258_LINK_FREQ_1267MBPS] = {
++		.pixels_per_line = IMX258_PPL_DEFAULT,
++		.reg_list = {
++			.num_of_regs = ARRAY_SIZE(mipi_1267mbps_19_2mhz),
++			.regs = mipi_1267mbps_19_2mhz,
++		}
++	},
++	[IMX258_LINK_FREQ_640MBPS] = {
++		.pixels_per_line = IMX258_PPL_DEFAULT,
++		.reg_list = {
++			.num_of_regs = ARRAY_SIZE(mipi_640mbps_19_2mhz),
++			.regs = mipi_640mbps_19_2mhz,
++		}
++	},
++};
++
++static const struct imx258_link_freq_config link_freq_configs_24[] = {
+ 	[IMX258_LINK_FREQ_1267MBPS] = {
+ 		.pixels_per_line = IMX258_PPL_DEFAULT,
+ 		.reg_list = {
+-			.num_of_regs = ARRAY_SIZE(mipi_data_rate_1267mbps),
+-			.regs = mipi_data_rate_1267mbps,
++			.num_of_regs = ARRAY_SIZE(mipi_1272mbps_24mhz),
++			.regs = mipi_1272mbps_24mhz,
+ 		}
+ 	},
+ 	[IMX258_LINK_FREQ_640MBPS] = {
+ 		.pixels_per_line = IMX258_PPL_DEFAULT,
+ 		.reg_list = {
+-			.num_of_regs = ARRAY_SIZE(mipi_data_rate_640mbps),
+-			.regs = mipi_data_rate_640mbps,
++			.num_of_regs = ARRAY_SIZE(mipi_642mbps_24mhz),
++			.regs = mipi_642mbps_24mhz,
+ 		}
+ 	},
+ };
+@@ -630,6 +692,9 @@ struct imx258 {
+ 	/* Current mode */
+ 	const struct imx258_mode *cur_mode;
+ 
++	const struct imx258_link_freq_config *link_freq_configs;
++	const s64 *link_freq_menu_items;
++
+ 	/*
+ 	 * Mutex for serialized access:
+ 	 * Protect sensor module set pad format and start/stop streaming safely.
+@@ -958,7 +1023,7 @@ static int imx258_set_pad_format(struct
+ 		imx258->cur_mode = mode;
+ 		__v4l2_ctrl_s_ctrl(imx258->link_freq, mode->link_freq_index);
+ 
+-		link_freq = link_freq_menu_items[mode->link_freq_index];
++		link_freq = imx258->link_freq_menu_items[mode->link_freq_index];
+ 		pixel_rate = link_freq_to_pixel_rate(link_freq);
+ 		__v4l2_ctrl_s_ctrl_int64(imx258->pixel_rate, pixel_rate);
+ 		/* Update limits and set FPS to default */
+@@ -972,7 +1037,7 @@ static int imx258_set_pad_format(struct
+ 			vblank_def);
+ 		__v4l2_ctrl_s_ctrl(imx258->vblank, vblank_def);
+ 		h_blank =
+-			link_freq_configs[mode->link_freq_index].pixels_per_line
++			imx258->link_freq_configs[mode->link_freq_index].pixels_per_line
+ 			 - imx258->cur_mode->width;
+ 		__v4l2_ctrl_modify_range(imx258->hblank, h_blank,
+ 					 h_blank, 1, h_blank);
+@@ -992,7 +1057,7 @@ static int imx258_start_streaming(struct
+ 
+ 	/* Setup PLL */
+ 	link_freq_index = imx258->cur_mode->link_freq_index;
+-	reg_list = &link_freq_configs[link_freq_index].reg_list;
++	reg_list = &imx258->link_freq_configs[link_freq_index].reg_list;
+ 	ret = imx258_write_regs(imx258, reg_list->regs, reg_list->num_of_regs);
+ 	if (ret) {
+ 		dev_err(&client->dev, "%s failed to set plls\n", __func__);
+@@ -1210,15 +1275,17 @@ static int imx258_init_controls(struct i
+ 	imx258->link_freq = v4l2_ctrl_new_int_menu(ctrl_hdlr,
+ 				&imx258_ctrl_ops,
+ 				V4L2_CID_LINK_FREQ,
+-				ARRAY_SIZE(link_freq_menu_items) - 1,
++				ARRAY_SIZE(link_freq_menu_items_19_2) - 1,
+ 				0,
+-				link_freq_menu_items);
++				imx258->link_freq_menu_items);
+ 
+ 	if (imx258->link_freq)
+ 		imx258->link_freq->flags |= V4L2_CTRL_FLAG_READ_ONLY;
+ 
+-	pixel_rate_max = link_freq_to_pixel_rate(link_freq_menu_items[0]);
+-	pixel_rate_min = link_freq_to_pixel_rate(link_freq_menu_items[1]);
++	pixel_rate_max =
++		link_freq_to_pixel_rate(imx258->link_freq_menu_items[0]);
++	pixel_rate_min =
++		link_freq_to_pixel_rate(imx258->link_freq_menu_items[1]);
+ 	/* By default, PIXEL_RATE is read only */
+ 	imx258->pixel_rate = v4l2_ctrl_new_std(ctrl_hdlr, &imx258_ctrl_ops,
+ 				V4L2_CID_PIXEL_RATE,
+@@ -1346,11 +1413,25 @@ static int imx258_probe(struct i2c_clien
+ 			"no clock provided, using clock-frequency property\n");
+ 
+ 		device_property_read_u32(&client->dev, "clock-frequency", &val);
++	} else if (IS_ERR(imx258->clk)) {
++		return dev_err_probe(&client->dev, PTR_ERR(imx258->clk),
++				     "error getting clock\n");
+ 	} else {
+ 		val = clk_get_rate(imx258->clk);
+ 	}
+-	if (val != IMX258_INPUT_CLOCK_FREQ) {
+-		dev_err(&client->dev, "input clock frequency not supported\n");
++
++	switch (val) {
++	case 19200000:
++		imx258->link_freq_configs = link_freq_configs_19_2;
++		imx258->link_freq_menu_items = link_freq_menu_items_19_2;
++		break;
++	case 24000000:
++		imx258->link_freq_configs = link_freq_configs_24;
++		imx258->link_freq_menu_items = link_freq_menu_items_24;
++		break;
++	default:
++		dev_err(&client->dev, "input clock frequency of %u not supported\n",
++			val);
+ 		return -EINVAL;
+ 	}
+