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Diffstat (limited to 'target/linux/bcm27xx/patches-5.15/950-0795-drm-tiny-Add-MIPI-DBI-compatible-SPI-driver.patch')
-rw-r--r--target/linux/bcm27xx/patches-5.15/950-0795-drm-tiny-Add-MIPI-DBI-compatible-SPI-driver.patch515
1 files changed, 0 insertions, 515 deletions
diff --git a/target/linux/bcm27xx/patches-5.15/950-0795-drm-tiny-Add-MIPI-DBI-compatible-SPI-driver.patch b/target/linux/bcm27xx/patches-5.15/950-0795-drm-tiny-Add-MIPI-DBI-compatible-SPI-driver.patch
deleted file mode 100644
index 442e10add2..0000000000
--- a/target/linux/bcm27xx/patches-5.15/950-0795-drm-tiny-Add-MIPI-DBI-compatible-SPI-driver.patch
+++ /dev/null
@@ -1,515 +0,0 @@
-From e73c6348ebeeb60bc92b316904c7ae5ca7b68fe1 Mon Sep 17 00:00:00 2001
-From: =?UTF-8?q?Noralf=20Tr=C3=B8nnes?= <noralf@tronnes.org>
-Date: Sun, 27 Feb 2022 13:47:13 +0100
-Subject: [PATCH] drm/tiny: Add MIPI DBI compatible SPI driver
-MIME-Version: 1.0
-Content-Type: text/plain; charset=UTF-8
-Content-Transfer-Encoding: 8bit
-
-commit 0e65e2e upstream.
-
-Add a driver that will work with most MIPI DBI compatible SPI panels.
-This avoids adding a driver for every new MIPI DBI compatible controller
-that is to be used by Linux. The 'compatible' Device Tree property with
-a '.bin' suffix will be used to load a firmware file that contains the
-controller configuration.
-
-Example (driver will load sainsmart18.bin):
-
-display@0 {
- compatible = "sainsmart18", "panel-mipi-dbi-spi";
-...
-};
-
-v5:
-- kconfig: s/DRM_KMS_CMA_HELPER/DRM_GEM_CMA_HELPER/ (Sam)
-- kconfig: Add select VIDEOMODE_HELPERS (Sam)
-- kconfig: Add wiki url in the description (Sam)
-- Split out and use of_get_drm_panel_display_mode()(Sam)
-- Only use the first compatible to look for a firmware file since the
- binding mandates 2 compatibles.
-- Make having a firmware file mandatory so we can print an error
- message if it's missing to improve the user experience. It's very
- unlikely that a controller doesn't need to be initialized and if
- it doesn't, it's possible to have a firmware file containing only
- a DCS NOP.
-
-v4:
-- Move driver to drm/tiny where the other drivers of its kind are located.
- The driver module will not be shared with a future DPI driver after all.
-
-v3:
-- Move properties to DT (Maxime)
-- The MIPI DPI spec has optional support for DPI where the controller is
- configured over DBI. Rework the command functions so they can be moved
- to drm_mipi_dbi and shared with a future panel-mipi-dpi-spi driver
-
-v2:
-- Drop model property and use compatible instead (Rob)
-- Add wiki entry in MAINTAINERS
-
-Acked-by: Maxime Ripard <maxime@cerno.tech>
-Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
-Signed-off-by: Noralf Trønnes <noralf@tronnes.org>
-Signed-off-by: Maxime Ripard <maxime@cerno.tech>
-Link: https://patchwork.freedesktop.org/patch/msgid/20220227124713.39766-6-noralf@tronnes.org
----
- MAINTAINERS | 8 +
- drivers/gpu/drm/tiny/Kconfig | 15 +
- drivers/gpu/drm/tiny/Makefile | 1 +
- drivers/gpu/drm/tiny/panel-mipi-dbi.c | 398 ++++++++++++++++++++++++++
- 4 files changed, 422 insertions(+)
- create mode 100644 drivers/gpu/drm/tiny/panel-mipi-dbi.c
-
---- a/MAINTAINERS
-+++ b/MAINTAINERS
-@@ -5980,6 +5980,14 @@ T: git git://anongit.freedesktop.org/drm
- F: Documentation/devicetree/bindings/display/multi-inno,mi0283qt.txt
- F: drivers/gpu/drm/tiny/mi0283qt.c
-
-+DRM DRIVER FOR MIPI DBI compatible panels
-+M: Noralf Trønnes <noralf@tronnes.org>
-+S: Maintained
-+W: https://github.com/notro/panel-mipi-dbi/wiki
-+T: git git://anongit.freedesktop.org/drm/drm-misc
-+F: Documentation/devicetree/bindings/display/panel/panel-mipi-dbi-spi.yaml
-+F: drivers/gpu/drm/tiny/panel-mipi-dbi.c
-+
- DRM DRIVER FOR MSM ADRENO GPU
- M: Rob Clark <robdclark@gmail.com>
- M: Sean Paul <sean@poorly.run>
---- a/drivers/gpu/drm/tiny/Kconfig
-+++ b/drivers/gpu/drm/tiny/Kconfig
-@@ -51,6 +51,21 @@ config DRM_GM12U320
- This is a KMS driver for projectors which use the GM12U320 chipset
- for video transfer over USB2/3, such as the Acer C120 mini projector.
-
-+config DRM_PANEL_MIPI_DBI
-+ tristate "DRM support for MIPI DBI compatible panels"
-+ depends on DRM && SPI
-+ select DRM_KMS_HELPER
-+ select DRM_GEM_CMA_HELPER
-+ select DRM_MIPI_DBI
-+ select BACKLIGHT_CLASS_DEVICE
-+ select VIDEOMODE_HELPERS
-+ help
-+ Say Y here if you want to enable support for MIPI DBI compatible
-+ panels. The controller command setup can be provided using a
-+ firmware file. For more information see
-+ https://github.com/notro/panel-mipi-dbi/wiki.
-+ To compile this driver as a module, choose M here.
-+
- config DRM_SIMPLEDRM
- tristate "Simple framebuffer driver"
- depends on DRM
---- a/drivers/gpu/drm/tiny/Makefile
-+++ b/drivers/gpu/drm/tiny/Makefile
-@@ -4,6 +4,7 @@ obj-$(CONFIG_DRM_ARCPGU) += arcpgu.o
- obj-$(CONFIG_DRM_BOCHS) += bochs.o
- obj-$(CONFIG_DRM_CIRRUS_QEMU) += cirrus.o
- obj-$(CONFIG_DRM_GM12U320) += gm12u320.o
-+obj-$(CONFIG_DRM_PANEL_MIPI_DBI) += panel-mipi-dbi.o
- obj-$(CONFIG_DRM_SIMPLEDRM) += simpledrm.o
- obj-$(CONFIG_TINYDRM_HX8357D) += hx8357d.o
- obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o
---- /dev/null
-+++ b/drivers/gpu/drm/tiny/panel-mipi-dbi.c
-@@ -0,0 +1,398 @@
-+// SPDX-License-Identifier: GPL-2.0
-+/*
-+ * DRM driver for MIPI DBI compatible display panels
-+ *
-+ * Copyright 2022 Noralf Trønnes
-+ */
-+
-+#include <linux/backlight.h>
-+#include <linux/delay.h>
-+#include <linux/firmware.h>
-+#include <linux/gpio/consumer.h>
-+#include <linux/module.h>
-+#include <linux/property.h>
-+#include <linux/regulator/consumer.h>
-+#include <linux/spi/spi.h>
-+
-+#include <drm/drm_atomic_helper.h>
-+#include <drm/drm_drv.h>
-+#include <drm/drm_fb_helper.h>
-+#include <drm/drm_gem_atomic_helper.h>
-+#include <drm/drm_gem_cma_helper.h>
-+#include <drm/drm_managed.h>
-+#include <drm/drm_mipi_dbi.h>
-+#include <drm/drm_modes.h>
-+#include <drm/drm_modeset_helper.h>
-+
-+#include <video/mipi_display.h>
-+
-+static const u8 panel_mipi_dbi_magic[15] = { 'M', 'I', 'P', 'I', ' ', 'D', 'B', 'I',
-+ 0, 0, 0, 0, 0, 0, 0 };
-+
-+/*
-+ * The display controller configuration is stored in a firmware file.
-+ * The Device Tree 'compatible' property value with a '.bin' suffix is passed
-+ * to request_firmware() to fetch this file.
-+ */
-+struct panel_mipi_dbi_config {
-+ /* Magic string: panel_mipi_dbi_magic */
-+ u8 magic[15];
-+
-+ /* Config file format version */
-+ u8 file_format_version;
-+
-+ /*
-+ * MIPI commands to execute when the display pipeline is enabled.
-+ * This is used to configure the display controller.
-+ *
-+ * The commands are stored in a byte array with the format:
-+ * command, num_parameters, [ parameter, ...], command, ...
-+ *
-+ * Some commands require a pause before the next command can be received.
-+ * Inserting a delay in the command sequence is done by using the NOP command with one
-+ * parameter: delay in miliseconds (the No Operation command is part of the MIPI Display
-+ * Command Set where it has no parameters).
-+ *
-+ * Example:
-+ * command 0x11
-+ * sleep 120ms
-+ * command 0xb1 parameters 0x01, 0x2c, 0x2d
-+ * command 0x29
-+ *
-+ * Byte sequence:
-+ * 0x11 0x00
-+ * 0x00 0x01 0x78
-+ * 0xb1 0x03 0x01 0x2c 0x2d
-+ * 0x29 0x00
-+ */
-+ u8 commands[];
-+};
-+
-+struct panel_mipi_dbi_commands {
-+ const u8 *buf;
-+ size_t len;
-+};
-+
-+static struct panel_mipi_dbi_commands *
-+panel_mipi_dbi_check_commands(struct device *dev, const struct firmware *fw)
-+{
-+ const struct panel_mipi_dbi_config *config = (struct panel_mipi_dbi_config *)fw->data;
-+ struct panel_mipi_dbi_commands *commands;
-+ size_t size = fw->size, commands_len;
-+ unsigned int i = 0;
-+
-+ if (size < sizeof(*config) + 2) { /* At least 1 command */
-+ dev_err(dev, "config: file size=%zu is too small\n", size);
-+ return ERR_PTR(-EINVAL);
-+ }
-+
-+ if (memcmp(config->magic, panel_mipi_dbi_magic, sizeof(config->magic))) {
-+ dev_err(dev, "config: Bad magic: %15ph\n", config->magic);
-+ return ERR_PTR(-EINVAL);
-+ }
-+
-+ if (config->file_format_version != 1) {
-+ dev_err(dev, "config: version=%u is not supported\n", config->file_format_version);
-+ return ERR_PTR(-EINVAL);
-+ }
-+
-+ drm_dev_dbg(dev, DRM_UT_DRIVER, "size=%zu version=%u\n", size, config->file_format_version);
-+
-+ commands_len = size - sizeof(*config);
-+
-+ while ((i + 1) < commands_len) {
-+ u8 command = config->commands[i++];
-+ u8 num_parameters = config->commands[i++];
-+ const u8 *parameters = &config->commands[i];
-+
-+ i += num_parameters;
-+ if (i > commands_len) {
-+ dev_err(dev, "config: command=0x%02x num_parameters=%u overflows\n",
-+ command, num_parameters);
-+ return ERR_PTR(-EINVAL);
-+ }
-+
-+ if (command == 0x00 && num_parameters == 1)
-+ drm_dev_dbg(dev, DRM_UT_DRIVER, "sleep %ums\n", parameters[0]);
-+ else
-+ drm_dev_dbg(dev, DRM_UT_DRIVER, "command %02x %*ph\n",
-+ command, num_parameters, parameters);
-+ }
-+
-+ if (i != commands_len) {
-+ dev_err(dev, "config: malformed command array\n");
-+ return ERR_PTR(-EINVAL);
-+ }
-+
-+ commands = devm_kzalloc(dev, sizeof(*commands), GFP_KERNEL);
-+ if (!commands)
-+ return ERR_PTR(-ENOMEM);
-+
-+ commands->len = commands_len;
-+ commands->buf = devm_kmemdup(dev, config->commands, commands->len, GFP_KERNEL);
-+ if (!commands->buf)
-+ return ERR_PTR(-ENOMEM);
-+
-+ return commands;
-+}
-+
-+static struct panel_mipi_dbi_commands *panel_mipi_dbi_commands_from_fw(struct device *dev)
-+{
-+ struct panel_mipi_dbi_commands *commands;
-+ const struct firmware *fw;
-+ const char *compatible;
-+ char fw_name[40];
-+ int ret;
-+
-+ ret = of_property_read_string_index(dev->of_node, "compatible", 0, &compatible);
-+ if (ret)
-+ return ERR_PTR(ret);
-+
-+ snprintf(fw_name, sizeof(fw_name), "%s.bin", compatible);
-+ ret = request_firmware(&fw, fw_name, dev);
-+ if (ret) {
-+ dev_err(dev, "No config file found for compatible '%s' (error=%d)\n",
-+ compatible, ret);
-+
-+ return ERR_PTR(ret);
-+ }
-+
-+ commands = panel_mipi_dbi_check_commands(dev, fw);
-+ release_firmware(fw);
-+
-+ return commands;
-+}
-+
-+static void panel_mipi_dbi_commands_execute(struct mipi_dbi *dbi,
-+ struct panel_mipi_dbi_commands *commands)
-+{
-+ unsigned int i = 0;
-+
-+ if (!commands)
-+ return;
-+
-+ while (i < commands->len) {
-+ u8 command = commands->buf[i++];
-+ u8 num_parameters = commands->buf[i++];
-+ const u8 *parameters = &commands->buf[i];
-+
-+ if (command == 0x00 && num_parameters == 1)
-+ msleep(parameters[0]);
-+ else if (num_parameters)
-+ mipi_dbi_command_stackbuf(dbi, command, parameters, num_parameters);
-+ else
-+ mipi_dbi_command(dbi, command);
-+
-+ i += num_parameters;
-+ }
-+}
-+
-+static void panel_mipi_dbi_enable(struct drm_simple_display_pipe *pipe,
-+ struct drm_crtc_state *crtc_state,
-+ struct drm_plane_state *plane_state)
-+{
-+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
-+ struct mipi_dbi *dbi = &dbidev->dbi;
-+ int ret, idx;
-+
-+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
-+ return;
-+
-+ drm_dbg(pipe->crtc.dev, "\n");
-+
-+ ret = mipi_dbi_poweron_conditional_reset(dbidev);
-+ if (ret < 0)
-+ goto out_exit;
-+ if (!ret)
-+ panel_mipi_dbi_commands_execute(dbi, dbidev->driver_private);
-+
-+ mipi_dbi_enable_flush(dbidev, crtc_state, plane_state);
-+out_exit:
-+ drm_dev_exit(idx);
-+}
-+
-+static const struct drm_simple_display_pipe_funcs panel_mipi_dbi_pipe_funcs = {
-+ .enable = panel_mipi_dbi_enable,
-+ .disable = mipi_dbi_pipe_disable,
-+ .update = mipi_dbi_pipe_update,
-+};
-+
-+DEFINE_DRM_GEM_CMA_FOPS(panel_mipi_dbi_fops);
-+
-+static const struct drm_driver panel_mipi_dbi_driver = {
-+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
-+ .fops = &panel_mipi_dbi_fops,
-+ DRM_GEM_CMA_DRIVER_OPS_VMAP,
-+ .debugfs_init = mipi_dbi_debugfs_init,
-+ .name = "panel-mipi-dbi",
-+ .desc = "MIPI DBI compatible display panel",
-+ .date = "20220103",
-+ .major = 1,
-+ .minor = 0,
-+};
-+
-+static int panel_mipi_dbi_get_mode(struct mipi_dbi_dev *dbidev, struct drm_display_mode *mode)
-+{
-+ struct device *dev = dbidev->drm.dev;
-+ u16 hback_porch, vback_porch;
-+ int ret;
-+
-+ ret = of_get_drm_panel_display_mode(dev->of_node, mode, NULL);
-+ if (ret) {
-+ dev_err(dev, "%pOF: failed to get panel-timing (error=%d)\n", dev->of_node, ret);
-+ return ret;
-+ }
-+
-+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
-+
-+ hback_porch = mode->htotal - mode->hsync_end;
-+ vback_porch = mode->vtotal - mode->vsync_end;
-+
-+ /*
-+ * Make sure width and height are set and that only back porch and
-+ * pixelclock are set in the other timing values. Also check that
-+ * width and height don't exceed the 16-bit value specified by MIPI DCS.
-+ */
-+ if (!mode->hdisplay || !mode->vdisplay || mode->flags ||
-+ mode->hsync_end > mode->hdisplay || (hback_porch + mode->hdisplay) > 0xffff ||
-+ mode->vsync_end > mode->vdisplay || (vback_porch + mode->vdisplay) > 0xffff) {
-+ dev_err(dev, "%pOF: panel-timing out of bounds\n", dev->of_node);
-+ return -EINVAL;
-+ }
-+
-+ /* The driver doesn't use the pixel clock but it is mandatory so fake one if not set */
-+ if (!mode->clock)
-+ mode->clock = mode->htotal * mode->vtotal * 60 / 1000;
-+
-+ dbidev->top_offset = vback_porch;
-+ dbidev->left_offset = hback_porch;
-+
-+ return 0;
-+}
-+
-+static int panel_mipi_dbi_spi_probe(struct spi_device *spi)
-+{
-+ struct device *dev = &spi->dev;
-+ struct drm_display_mode mode;
-+ struct mipi_dbi_dev *dbidev;
-+ struct drm_device *drm;
-+ struct mipi_dbi *dbi;
-+ struct gpio_desc *dc;
-+ int ret;
-+
-+ dbidev = devm_drm_dev_alloc(dev, &panel_mipi_dbi_driver, struct mipi_dbi_dev, drm);
-+ if (IS_ERR(dbidev))
-+ return PTR_ERR(dbidev);
-+
-+ dbi = &dbidev->dbi;
-+ drm = &dbidev->drm;
-+
-+ ret = panel_mipi_dbi_get_mode(dbidev, &mode);
-+ if (ret)
-+ return ret;
-+
-+ dbidev->regulator = devm_regulator_get(dev, "power");
-+ if (IS_ERR(dbidev->regulator))
-+ return dev_err_probe(dev, PTR_ERR(dbidev->regulator),
-+ "Failed to get regulator 'power'\n");
-+
-+ dbidev->backlight = devm_of_find_backlight(dev);
-+ if (IS_ERR(dbidev->backlight))
-+ return dev_err_probe(dev, PTR_ERR(dbidev->backlight), "Failed to get backlight\n");
-+
-+ dbi->reset = devm_gpiod_get_optional(dev, "reset", GPIOD_OUT_HIGH);
-+ if (IS_ERR(dbi->reset))
-+ return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");
-+
-+ dc = devm_gpiod_get_optional(dev, "dc", GPIOD_OUT_LOW);
-+ if (IS_ERR(dc))
-+ return dev_err_probe(dev, PTR_ERR(dc), "Failed to get GPIO 'dc'\n");
-+
-+ ret = mipi_dbi_spi_init(spi, dbi, dc);
-+ if (ret)
-+ return ret;
-+
-+ if (device_property_present(dev, "write-only"))
-+ dbi->read_commands = NULL;
-+
-+ dbidev->driver_private = panel_mipi_dbi_commands_from_fw(dev);
-+ if (IS_ERR(dbidev->driver_private))
-+ return PTR_ERR(dbidev->driver_private);
-+
-+ ret = mipi_dbi_dev_init(dbidev, &panel_mipi_dbi_pipe_funcs, &mode, 0);
-+ if (ret)
-+ return ret;
-+
-+ drm_mode_config_reset(drm);
-+
-+ ret = drm_dev_register(drm, 0);
-+ if (ret)
-+ return ret;
-+
-+ spi_set_drvdata(spi, drm);
-+
-+ drm_fbdev_generic_setup(drm, 0);
-+
-+ return 0;
-+}
-+
-+static int panel_mipi_dbi_spi_remove(struct spi_device *spi)
-+{
-+ struct drm_device *drm = spi_get_drvdata(spi);
-+
-+ drm_dev_unplug(drm);
-+ drm_atomic_helper_shutdown(drm);
-+
-+ return 0;
-+}
-+
-+static void panel_mipi_dbi_spi_shutdown(struct spi_device *spi)
-+{
-+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
-+}
-+
-+static int __maybe_unused panel_mipi_dbi_pm_suspend(struct device *dev)
-+{
-+ return drm_mode_config_helper_suspend(dev_get_drvdata(dev));
-+}
-+
-+static int __maybe_unused panel_mipi_dbi_pm_resume(struct device *dev)
-+{
-+ drm_mode_config_helper_resume(dev_get_drvdata(dev));
-+
-+ return 0;
-+}
-+
-+static const struct dev_pm_ops panel_mipi_dbi_pm_ops = {
-+ SET_SYSTEM_SLEEP_PM_OPS(panel_mipi_dbi_pm_suspend, panel_mipi_dbi_pm_resume)
-+};
-+
-+static const struct of_device_id panel_mipi_dbi_spi_of_match[] = {
-+ { .compatible = "panel-mipi-dbi-spi" },
-+ {},
-+};
-+MODULE_DEVICE_TABLE(of, panel_mipi_dbi_spi_of_match);
-+
-+static const struct spi_device_id panel_mipi_dbi_spi_id[] = {
-+ { "panel-mipi-dbi-spi", 0 },
-+ { },
-+};
-+MODULE_DEVICE_TABLE(spi, panel_mipi_dbi_spi_id);
-+
-+static struct spi_driver panel_mipi_dbi_spi_driver = {
-+ .driver = {
-+ .name = "panel-mipi-dbi-spi",
-+ .owner = THIS_MODULE,
-+ .of_match_table = panel_mipi_dbi_spi_of_match,
-+ .pm = &panel_mipi_dbi_pm_ops,
-+ },
-+ .id_table = panel_mipi_dbi_spi_id,
-+ .probe = panel_mipi_dbi_spi_probe,
-+ .remove = panel_mipi_dbi_spi_remove,
-+ .shutdown = panel_mipi_dbi_spi_shutdown,
-+};
-+module_spi_driver(panel_mipi_dbi_spi_driver);
-+
-+MODULE_DESCRIPTION("MIPI DBI compatible display panel driver");
-+MODULE_AUTHOR("Noralf Trønnes");
-+MODULE_LICENSE("GPL");
generated by cgit v1.2.3 (git 2.25.1) at 2024-10-12 16:31:19 +0000