[RFC PATCH v2 14/16] staging: media: remove MAX96712 driver

Cosmin Tanislav
2025-03-09T08:49:13Z

Remove the staging MAX96712 driver.
Its functionality has been moved to the MAX96724 driver which makes use
of the Maxim GMSL2/3 deserializer framework.

Signed-off-by: Cosmin Tanislav <demonsingur@gmail.com>
---
MAINTAINERS | 1 -
drivers/staging/media/Kconfig | 2 -
drivers/staging/media/Makefile | 1 -
drivers/staging/media/max96712/Kconfig | 14 -
drivers/staging/media/max96712/Makefile | 2 -
drivers/staging/media/max96712/max96712.c | 487 ----------------------
6 files changed, 507 deletions(-)
delete mode 100644 drivers/staging/media/max96712/Kconfig
delete mode 100644 drivers/staging/media/max96712/Makefile
delete mode 100644 drivers/staging/media/max96712/max96712.c

diff --git a/MAINTAINERS b/MAINTAINERS
index e97c4f55bc2f..4d1ff8cf537b 100644
--- a/MAINTAINERS
+++ b/MAINTAINERS
@@ -14188,7 +14188,6 @@ M: Cosmin Tanislav <cosmin.tanislav@analog.com>
L: linux-media@vger.kernel.org
S: Maintained
F: Documentation/devicetree/bindings/media/i2c/maxim,max96712.yaml
-F: drivers/staging/media/max96712/max96712.c

MAX96714 GMSL2 DESERIALIZER DRIVER
M: Julien Massot <julien.massot@collabora.com>
diff --git a/drivers/staging/media/Kconfig b/drivers/staging/media/Kconfig
index b44214854399..fe29821f64a3 100644
--- a/drivers/staging/media/Kconfig
+++ b/drivers/staging/media/Kconfig
@@ -28,8 +28,6 @@ source "drivers/staging/media/imx/Kconfig"

source "drivers/staging/media/ipu3/Kconfig"

-source "drivers/staging/media/max96712/Kconfig"
-
source "drivers/staging/media/meson/vdec/Kconfig"

source "drivers/staging/media/rkvdec/Kconfig"
diff --git a/drivers/staging/media/Makefile b/drivers/staging/media/Makefile
index ad4e9619a9e0..1a562b3b6881 100644
--- a/drivers/staging/media/Makefile
+++ b/drivers/staging/media/Makefile
@@ -2,7 +2,6 @@
obj-$(CONFIG_VIDEO_ATMEL_ISC_BASE) += deprecated/atmel/
obj-$(CONFIG_INTEL_ATOMISP) += atomisp/
obj-$(CONFIG_VIDEO_IMX_MEDIA) += imx/
-obj-$(CONFIG_VIDEO_MAX96712) += max96712/
obj-$(CONFIG_VIDEO_MESON_VDEC) += meson/vdec/
obj-$(CONFIG_VIDEO_ROCKCHIP_VDEC) += rkvdec/
obj-$(CONFIG_VIDEO_STARFIVE_CAMSS) += starfive/
diff --git a/drivers/staging/media/max96712/Kconfig b/drivers/staging/media/max96712/Kconfig
deleted file mode 100644
index 117fadf81bd0..000000000000
--- a/drivers/staging/media/max96712/Kconfig
+++ /dev/null
@@ -1,14 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-config VIDEO_MAX96712
- tristate "Maxim MAX96712 Quad GMSL2 Deserializer support"
- depends on I2C
- depends on OF_GPIO
- depends on VIDEO_DEV
- select V4L2_FWNODE
- select VIDEO_V4L2_SUBDEV_API
- select MEDIA_CONTROLLER
- help
- This driver supports the Maxim MAX96712 Quad GMSL2 Deserializer.
-
- To compile this driver as a module, choose M here: the
- module will be called max96712.
diff --git a/drivers/staging/media/max96712/Makefile b/drivers/staging/media/max96712/Makefile
deleted file mode 100644
index 70c1974ce3f0..000000000000
--- a/drivers/staging/media/max96712/Makefile
+++ /dev/null
@@ -1,2 +0,0 @@
-# SPDX-License-Identifier: GPL-2.0
-obj-$(CONFIG_VIDEO_MAX96712) += max96712.o
diff --git a/drivers/staging/media/max96712/max96712.c b/drivers/staging/media/max96712/max96712.c
deleted file mode 100644
index 0751b2e04895..000000000000
--- a/drivers/staging/media/max96712/max96712.c
+++ /dev/null
@@ -1,487 +0,0 @@
-// SPDX-License-Identifier: GPL-2.0
-/*
- * Maxim MAX96712 Quad GMSL2 Deserializer Driver
- *
- * Copyright (C) 2021 Renesas Electronics Corporation
- * Copyright (C) 2021 Niklas Söderlund
- */
-
-#include <linux/delay.h>
-#include <linux/i2c.h>
-#include <linux/module.h>
-#include <linux/of_graph.h>
-#include <linux/regmap.h>
-
-#include <media/v4l2-ctrls.h>
-#include <media/v4l2-fwnode.h>
-#include <media/v4l2-subdev.h>
-
-#define DEBUG_EXTRA_REG 0x09
-#define DEBUG_EXTRA_PCLK_25MHZ 0x00
-#define DEBUG_EXTRA_PCLK_75MHZ 0x01
-
-enum max96712_pattern {
- MAX96712_PATTERN_CHECKERBOARD = 0,
- MAX96712_PATTERN_GRADIENT,
-};
-
-struct max96712_info {
- unsigned int dpllfreq;
- bool have_debug_extra;
-};
-
-struct max96712_priv {
- struct i2c_client *client;
- struct regmap *regmap;
- struct gpio_desc *gpiod_pwdn;
-
- const struct max96712_info *info;
-
- bool cphy;
- struct v4l2_mbus_config_mipi_csi2 mipi;
-
- struct v4l2_subdev sd;
- struct v4l2_ctrl_handler ctrl_handler;
- struct media_pad pads[1];
-
- enum max96712_pattern pattern;
-};
-
-static int max96712_write(struct max96712_priv *priv, unsigned int reg, u8 val)
-{
- int ret;
-
- ret = regmap_write(priv->regmap, reg, val);
- if (ret)
- dev_err(&priv->client->dev, "write 0x%04x failed\n", reg);
-
- return ret;
-}
-
-static int max96712_update_bits(struct max96712_priv *priv, unsigned int reg,
- u8 mask, u8 val)
-{
- int ret;
-
- ret = regmap_update_bits(priv->regmap, reg, mask, val);
- if (ret)
- dev_err(&priv->client->dev, "update 0x%04x failed\n", reg);
-
- return ret;
-}
-
-static int max96712_write_bulk(struct max96712_priv *priv, unsigned int reg,
- const void *val, size_t val_count)
-{
- int ret;
-
- ret = regmap_bulk_write(priv->regmap, reg, val, val_count);
- if (ret)
- dev_err(&priv->client->dev, "bulk write 0x%04x failed\n", reg);
-
- return ret;
-}
-
-static int max96712_write_bulk_value(struct max96712_priv *priv,
- unsigned int reg, unsigned int val,
- size_t val_count)
-{
- unsigned int i;
- u8 values[4];
-
- for (i = 1; i <= val_count; i++)
- values[i - 1] = (val >> ((val_count - i) * 8)) & 0xff;
-
- return max96712_write_bulk(priv, reg, &values, val_count);
-}
-
-static void max96712_reset(struct max96712_priv *priv)
-{
- max96712_update_bits(priv, 0x13, 0x40, 0x40);
- msleep(20);
-}
-
-static void max96712_mipi_enable(struct max96712_priv *priv, bool enable)
-{
- if (enable) {
- max96712_update_bits(priv, 0x40b, 0x02, 0x02);
- max96712_update_bits(priv, 0x8a0, 0x80, 0x80);
- } else {
- max96712_update_bits(priv, 0x8a0, 0x80, 0x00);
- max96712_update_bits(priv, 0x40b, 0x02, 0x00);
- }
-}
-
-static void max96712_mipi_configure(struct max96712_priv *priv)
-{
- unsigned int i;
- u8 phy5 = 0;
-
- max96712_mipi_enable(priv, false);
-
- /* Select 2x4 mode. */
- max96712_write(priv, 0x8a0, 0x04);
-
- /* TODO: Add support for 2-lane and 1-lane configurations. */
- if (priv->cphy) {
- /* Configure a 3-lane C-PHY using PHY0 and PHY1. */
- max96712_write(priv, 0x94a, 0xa0);
-
- /* Configure C-PHY timings. */
- max96712_write(priv, 0x8ad, 0x3f);
- max96712_write(priv, 0x8ae, 0x7d);
- } else {
- /* Configure a 4-lane D-PHY using PHY0 and PHY1. */
- max96712_write(priv, 0x94a, 0xc0);
- }
-
- /* Configure lane mapping for PHY0 and PHY1. */
- /* TODO: Add support for lane swapping. */
- max96712_write(priv, 0x8a3, 0xe4);
-
- /* Configure lane polarity for PHY0 and PHY1. */
- for (i = 0; i < priv->mipi.num_data_lanes + 1; i++)
- if (priv->mipi.lane_polarities[i])
- phy5 |= BIT(i == 0 ? 5 : i < 3 ? i - 1 : i);
- max96712_write(priv, 0x8a5, phy5);
-
- /* Set link frequency for PHY0 and PHY1. */
- max96712_update_bits(priv, 0x415, 0x3f,
- ((priv->info->dpllfreq / 100) & 0x1f) | BIT(5));
- max96712_update_bits(priv, 0x418, 0x3f,
- ((priv->info->dpllfreq / 100) & 0x1f) | BIT(5));
-
- /* Enable PHY0 and PHY1 */
- max96712_update_bits(priv, 0x8a2, 0xf0, 0x30);
-}
-
-static void max96712_pattern_enable(struct max96712_priv *priv, bool enable)
-{
- const u32 h_active = 1920;
- const u32 h_fp = 88;
- const u32 h_sw = 44;
- const u32 h_bp = 148;
- const u32 h_tot = h_active + h_fp + h_sw + h_bp;
-
- const u32 v_active = 1080;
- const u32 v_fp = 4;
- const u32 v_sw = 5;
- const u32 v_bp = 36;
- const u32 v_tot = v_active + v_fp + v_sw + v_bp;
-
- if (!enable) {
- max96712_write(priv, 0x1051, 0x00);
- return;
- }
-
- /* Set PCLK to 75MHz if device have DEBUG_EXTRA register. */
- if (priv->info->have_debug_extra)
- max96712_write(priv, DEBUG_EXTRA_REG, DEBUG_EXTRA_PCLK_75MHZ);
-
- /* Configure Video Timing Generator for 1920x1080 @ 30 fps. */
- max96712_write_bulk_value(priv, 0x1052, 0, 3);
- max96712_write_bulk_value(priv, 0x1055, v_sw * h_tot, 3);
- max96712_write_bulk_value(priv, 0x1058,
- (v_active + v_fp + + v_bp) * h_tot, 3);
- max96712_write_bulk_value(priv, 0x105b, 0, 3);
- max96712_write_bulk_value(priv, 0x105e, h_sw, 2);
- max96712_write_bulk_value(priv, 0x1060, h_active + h_fp + h_bp, 2);
- max96712_write_bulk_value(priv, 0x1062, v_tot, 2);
- max96712_write_bulk_value(priv, 0x1064,
- h_tot * (v_sw + v_bp) + (h_sw + h_bp), 3);
- max96712_write_bulk_value(priv, 0x1067, h_active, 2);
- max96712_write_bulk_value(priv, 0x1069, h_fp + h_sw + h_bp, 2);
- max96712_write_bulk_value(priv, 0x106b, v_active, 2);
-
- /* Generate VS, HS and DE in free-running mode. */
- max96712_write(priv, 0x1050, 0xfb);
-
- /* Configure Video Pattern Generator. */
- if (priv->pattern == MAX96712_PATTERN_CHECKERBOARD) {
- /* Set checkerboard pattern size. */
- max96712_write(priv, 0x1074, 0x3c);
- max96712_write(priv, 0x1075, 0x3c);
- max96712_write(priv, 0x1076, 0x3c);
-
- /* Set checkerboard pattern colors. */
- max96712_write_bulk_value(priv, 0x106e, 0xfecc00, 3);
- max96712_write_bulk_value(priv, 0x1071, 0x006aa7, 3);
-
- /* Generate checkerboard pattern. */
- max96712_write(priv, 0x1051, 0x10);
- } else {
- /* Set gradient increment. */
- max96712_write(priv, 0x106d, 0x10);
-
- /* Generate gradient pattern. */
- max96712_write(priv, 0x1051, 0x20);
- }
-}
-
-static int max96712_s_stream(struct v4l2_subdev *sd, int enable)
-{
- struct max96712_priv *priv = v4l2_get_subdevdata(sd);
-
- if (enable) {
- max96712_pattern_enable(priv, true);
- max96712_mipi_enable(priv, true);
- } else {
- max96712_mipi_enable(priv, false);
- max96712_pattern_enable(priv, false);
- }
-
- return 0;
-}
-
-static const struct v4l2_subdev_video_ops max96712_video_ops = {
- .s_stream = max96712_s_stream,
-};
-
-static int max96712_init_state(struct v4l2_subdev *sd,
- struct v4l2_subdev_state *state)
-{
- static const struct v4l2_mbus_framefmt default_fmt = {
- .width = 1920,
- .height = 1080,
- .code = MEDIA_BUS_FMT_RGB888_1X24,
- .colorspace = V4L2_COLORSPACE_SRGB,
- .field = V4L2_FIELD_NONE,
- .ycbcr_enc = V4L2_YCBCR_ENC_DEFAULT,
- .quantization = V4L2_QUANTIZATION_DEFAULT,
- .xfer_func = V4L2_XFER_FUNC_DEFAULT,
- };
- struct v4l2_mbus_framefmt *fmt;
-
- fmt = v4l2_subdev_state_get_format(state, 0);
- *fmt = default_fmt;
-
- return 0;
-}
-
-static const struct v4l2_subdev_internal_ops max96712_internal_ops = {
- .init_state = max96712_init_state,
-};
-
-static const struct v4l2_subdev_pad_ops max96712_pad_ops = {
- .get_fmt = v4l2_subdev_get_fmt,
- .set_fmt = v4l2_subdev_get_fmt,
-};
-
-static const struct v4l2_subdev_ops max96712_subdev_ops = {
- .video = &max96712_video_ops,
- .pad = &max96712_pad_ops,
-};
-
-static const char * const max96712_test_pattern[] = {
- "Checkerboard",
- "Gradient",
-};
-
-static int max96712_s_ctrl(struct v4l2_ctrl *ctrl)
-{
- struct max96712_priv *priv =
- container_of(ctrl->handler, struct max96712_priv, ctrl_handler);
-
- switch (ctrl->id) {
- case V4L2_CID_TEST_PATTERN:
- priv->pattern = ctrl->val ?
- MAX96712_PATTERN_GRADIENT :
- MAX96712_PATTERN_CHECKERBOARD;
- break;
- }
- return 0;
-}
-
-static const struct v4l2_ctrl_ops max96712_ctrl_ops = {
- .s_ctrl = max96712_s_ctrl,
-};
-
-static int max96712_v4l2_register(struct max96712_priv *priv)
-{
- long pixel_rate;
- int ret;
-
- priv->sd.internal_ops = &max96712_internal_ops;
- v4l2_i2c_subdev_init(&priv->sd, priv->client, &max96712_subdev_ops);
- priv->sd.flags |= V4L2_SUBDEV_FL_HAS_DEVNODE;
- priv->sd.entity.function = MEDIA_ENT_F_VID_IF_BRIDGE;
-
- v4l2_ctrl_handler_init(&priv->ctrl_handler, 2);
-
- /*
- * TODO: Once V4L2_CID_LINK_FREQ is changed from a menu control to an
- * INT64 control it should be used here instead of V4L2_CID_PIXEL_RATE.
- */
- pixel_rate = priv->info->dpllfreq / priv->mipi.num_data_lanes * 1000000;
- v4l2_ctrl_new_std(&priv->ctrl_handler, NULL, V4L2_CID_PIXEL_RATE,
- pixel_rate, pixel_rate, 1, pixel_rate);
-
- v4l2_ctrl_new_std_menu_items(&priv->ctrl_handler, &max96712_ctrl_ops,
- V4L2_CID_TEST_PATTERN,
- ARRAY_SIZE(max96712_test_pattern) - 1,
- 0, 0, max96712_test_pattern);
-
- priv->sd.ctrl_handler = &priv->ctrl_handler;
- ret = priv->ctrl_handler.error;
- if (ret)
- goto error;
-
- priv->pads[0].flags = MEDIA_PAD_FL_SOURCE;
- ret = media_entity_pads_init(&priv->sd.entity, 1, priv->pads);
- if (ret)
- goto error;
-
- v4l2_set_subdevdata(&priv->sd, priv);
-
- priv->sd.state_lock = priv->ctrl_handler.lock;
- ret = v4l2_subdev_init_finalize(&priv->sd);
- if (ret)
- goto error;
-
- ret = v4l2_async_register_subdev(&priv->sd);
- if (ret < 0) {
- dev_err(&priv->client->dev, "Unable to register subdevice\n");
- goto error;
- }
-
- return 0;
-error:
- v4l2_ctrl_handler_free(&priv->ctrl_handler);
-
- return ret;
-}
-
-static int max96712_parse_dt(struct max96712_priv *priv)
-{
- struct fwnode_handle *ep;
- struct v4l2_fwnode_endpoint v4l2_ep = {
- .bus_type = V4L2_MBUS_UNKNOWN,
- };
- unsigned int supported_lanes;
- int ret;
-
- ep = fwnode_graph_get_endpoint_by_id(dev_fwnode(&priv->client->dev), 4,
- 0, 0);
- if (!ep) {
- dev_err(&priv->client->dev, "Not connected to subdevice\n");
- return -EINVAL;
- }
-
- ret = v4l2_fwnode_endpoint_parse(ep, &v4l2_ep);
- fwnode_handle_put(ep);
- if (ret) {
- dev_err(&priv->client->dev, "Could not parse v4l2 endpoint\n");
- return -EINVAL;
- }
-
- switch (v4l2_ep.bus_type) {
- case V4L2_MBUS_CSI2_DPHY:
- supported_lanes = 4;
- priv->cphy = false;
- break;
- case V4L2_MBUS_CSI2_CPHY:
- supported_lanes = 3;
- priv->cphy = true;
- break;
- default:
- dev_err(&priv->client->dev, "Unsupported bus-type %u\n",
- v4l2_ep.bus_type);
- return -EINVAL;
- }
-
- if (v4l2_ep.bus.mipi_csi2.num_data_lanes != supported_lanes) {
- dev_err(&priv->client->dev, "Only %u data lanes supported\n",
- supported_lanes);
- return -EINVAL;
- }
-
- priv->mipi = v4l2_ep.bus.mipi_csi2;
-
- return 0;
-}
-
-static const struct regmap_config max96712_i2c_regmap = {
- .reg_bits = 16,
- .val_bits = 8,
- .max_register = 0x1f00,
-};
-
-static int max96712_probe(struct i2c_client *client)
-{
- struct max96712_priv *priv;
- int ret;
-
- priv = devm_kzalloc(&client->dev, sizeof(*priv), GFP_KERNEL);
- if (!priv)
- return -ENOMEM;
-
- priv->info = of_device_get_match_data(&client->dev);
-
- priv->client = client;
-
- priv->regmap = devm_regmap_init_i2c(client, &max96712_i2c_regmap);
- if (IS_ERR(priv->regmap))
- return PTR_ERR(priv->regmap);
-
- priv->gpiod_pwdn = devm_gpiod_get_optional(&client->dev, "enable",
- GPIOD_OUT_HIGH);
- if (IS_ERR(priv->gpiod_pwdn))
- return PTR_ERR(priv->gpiod_pwdn);
-
- gpiod_set_consumer_name(priv->gpiod_pwdn, "max96712-pwdn");
- gpiod_set_value_cansleep(priv->gpiod_pwdn, 1);
-
- if (priv->gpiod_pwdn)
- usleep_range(4000, 5000);
-
- max96712_reset(priv);
-
- ret = max96712_parse_dt(priv);
- if (ret)
- return ret;
-
- max96712_mipi_configure(priv);
-
- return max96712_v4l2_register(priv);
-}
-
-static void max96712_remove(struct i2c_client *client)
-{
- struct v4l2_subdev *sd = i2c_get_clientdata(client);
- struct max96712_priv *priv = container_of(sd, struct max96712_priv, sd);
-
- v4l2_async_unregister_subdev(&priv->sd);
-
- gpiod_set_value_cansleep(priv->gpiod_pwdn, 0);
-}
-
-static const struct max96712_info max96712_info_max96712 = {
- .dpllfreq = 1000,
- .have_debug_extra = true,
-};
-
-static const struct max96712_info max96712_info_max96724 = {
- .dpllfreq = 1200,
-};
-
-static const struct of_device_id max96712_of_table[] = {
- { .compatible = "maxim,max96712", .data = &max96712_info_max96712 },
- { .compatible = "maxim,max96724", .data = &max96712_info_max96724 },
- { /* sentinel */ }
-};
-MODULE_DEVICE_TABLE(of, max96712_of_table);
-
-static struct i2c_driver max96712_i2c_driver = {
- .driver = {
- .name = "max96712",
- .of_match_table = of_match_ptr(max96712_of_table),
- },
- .probe = max96712_probe,
- .remove = max96712_remove,
-};
-
-module_i2c_driver(max96712_i2c_driver);
-
-MODULE_DESCRIPTION("Maxim MAX96712 Quad GMSL2 Deserializer Driver");
-MODULE_AUTHOR("Niklas Söderlund <niklas.soderlund@ragnatech.se>");
-MODULE_LICENSE("GPL");
--
2.48.1