Update Linux to v5.4.2
Change-Id: Idf6911045d9d382da2cfe01b1edff026404ac8fd
diff --git a/drivers/gpu/drm/tiny/ili9225.c b/drivers/gpu/drm/tiny/ili9225.c
new file mode 100644
index 0000000..c66acc5
--- /dev/null
+++ b/drivers/gpu/drm/tiny/ili9225.c
@@ -0,0 +1,470 @@
+// SPDX-License-Identifier: GPL-2.0-or-later
+/*
+ * DRM driver for Ilitek ILI9225 panels
+ *
+ * Copyright 2017 David Lechner <david@lechnology.com>
+ *
+ * Some code copied from mipi-dbi.c
+ * Copyright 2016 Noralf Trønnes
+ */
+
+#include <linux/delay.h>
+#include <linux/dma-buf.h>
+#include <linux/gpio/consumer.h>
+#include <linux/module.h>
+#include <linux/property.h>
+#include <linux/spi/spi.h>
+#include <video/mipi_display.h>
+
+#include <drm/drm_atomic_helper.h>
+#include <drm/drm_damage_helper.h>
+#include <drm/drm_drv.h>
+#include <drm/drm_fb_cma_helper.h>
+#include <drm/drm_fb_helper.h>
+#include <drm/drm_fourcc.h>
+#include <drm/drm_gem_cma_helper.h>
+#include <drm/drm_gem_framebuffer_helper.h>
+#include <drm/drm_mipi_dbi.h>
+#include <drm/drm_rect.h>
+#include <drm/drm_vblank.h>
+
+#define ILI9225_DRIVER_READ_CODE 0x00
+#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01
+#define ILI9225_LCD_AC_DRIVING_CONTROL 0x02
+#define ILI9225_ENTRY_MODE 0x03
+#define ILI9225_DISPLAY_CONTROL_1 0x07
+#define ILI9225_BLANK_PERIOD_CONTROL_1 0x08
+#define ILI9225_FRAME_CYCLE_CONTROL 0x0b
+#define ILI9225_INTERFACE_CONTROL 0x0c
+#define ILI9225_OSCILLATION_CONTROL 0x0f
+#define ILI9225_POWER_CONTROL_1 0x10
+#define ILI9225_POWER_CONTROL_2 0x11
+#define ILI9225_POWER_CONTROL_3 0x12
+#define ILI9225_POWER_CONTROL_4 0x13
+#define ILI9225_POWER_CONTROL_5 0x14
+#define ILI9225_VCI_RECYCLING 0x15
+#define ILI9225_RAM_ADDRESS_SET_1 0x20
+#define ILI9225_RAM_ADDRESS_SET_2 0x21
+#define ILI9225_WRITE_DATA_TO_GRAM 0x22
+#define ILI9225_SOFTWARE_RESET 0x28
+#define ILI9225_GATE_SCAN_CONTROL 0x30
+#define ILI9225_VERTICAL_SCROLL_1 0x31
+#define ILI9225_VERTICAL_SCROLL_2 0x32
+#define ILI9225_VERTICAL_SCROLL_3 0x33
+#define ILI9225_PARTIAL_DRIVING_POS_1 0x34
+#define ILI9225_PARTIAL_DRIVING_POS_2 0x35
+#define ILI9225_HORIZ_WINDOW_ADDR_1 0x36
+#define ILI9225_HORIZ_WINDOW_ADDR_2 0x37
+#define ILI9225_VERT_WINDOW_ADDR_1 0x38
+#define ILI9225_VERT_WINDOW_ADDR_2 0x39
+#define ILI9225_GAMMA_CONTROL_1 0x50
+#define ILI9225_GAMMA_CONTROL_2 0x51
+#define ILI9225_GAMMA_CONTROL_3 0x52
+#define ILI9225_GAMMA_CONTROL_4 0x53
+#define ILI9225_GAMMA_CONTROL_5 0x54
+#define ILI9225_GAMMA_CONTROL_6 0x55
+#define ILI9225_GAMMA_CONTROL_7 0x56
+#define ILI9225_GAMMA_CONTROL_8 0x57
+#define ILI9225_GAMMA_CONTROL_9 0x58
+#define ILI9225_GAMMA_CONTROL_10 0x59
+
+static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data)
+{
+ u8 par[2] = { data >> 8, data & 0xff };
+
+ return mipi_dbi_command_buf(dbi, cmd, par, 2);
+}
+
+static void ili9225_fb_dirty(struct drm_framebuffer *fb, struct drm_rect *rect)
+{
+ struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
+ unsigned int height = rect->y2 - rect->y1;
+ unsigned int width = rect->x2 - rect->x1;
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ bool swap = dbi->swap_bytes;
+ u16 x_start, y_start;
+ u16 x1, x2, y1, y2;
+ int idx, ret = 0;
+ bool full;
+ void *tr;
+
+ if (!dbidev->enabled)
+ return;
+
+ if (!drm_dev_enter(fb->dev, &idx))
+ return;
+
+ full = width == fb->width && height == fb->height;
+
+ DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
+
+ if (!dbi->dc || !full || swap ||
+ fb->format->format == DRM_FORMAT_XRGB8888) {
+ tr = dbidev->tx_buf;
+ ret = mipi_dbi_buf_copy(dbidev->tx_buf, fb, rect, swap);
+ if (ret)
+ goto err_msg;
+ } else {
+ tr = cma_obj->vaddr;
+ }
+
+ switch (dbidev->rotation) {
+ default:
+ x1 = rect->x1;
+ x2 = rect->x2 - 1;
+ y1 = rect->y1;
+ y2 = rect->y2 - 1;
+ x_start = x1;
+ y_start = y1;
+ break;
+ case 90:
+ x1 = rect->y1;
+ x2 = rect->y2 - 1;
+ y1 = fb->width - rect->x2;
+ y2 = fb->width - rect->x1 - 1;
+ x_start = x1;
+ y_start = y2;
+ break;
+ case 180:
+ x1 = fb->width - rect->x2;
+ x2 = fb->width - rect->x1 - 1;
+ y1 = fb->height - rect->y2;
+ y2 = fb->height - rect->y1 - 1;
+ x_start = x2;
+ y_start = y2;
+ break;
+ case 270:
+ x1 = fb->height - rect->y2;
+ x2 = fb->height - rect->y1 - 1;
+ y1 = rect->x1;
+ y2 = rect->x2 - 1;
+ x_start = x2;
+ y_start = y1;
+ break;
+ }
+
+ ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
+ ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
+ ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2);
+ ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1);
+
+ ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start);
+ ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start);
+
+ ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr,
+ width * height * 2);
+err_msg:
+ if (ret)
+ dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
+
+ drm_dev_exit(idx);
+}
+
+static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *old_state)
+{
+ struct drm_plane_state *state = pipe->plane.state;
+ struct drm_crtc *crtc = &pipe->crtc;
+ struct drm_rect rect;
+
+ if (drm_atomic_helper_damage_merged(old_state, state, &rect))
+ ili9225_fb_dirty(state->fb, &rect);
+
+ if (crtc->state->event) {
+ spin_lock_irq(&crtc->dev->event_lock);
+ drm_crtc_send_vblank_event(crtc, crtc->state->event);
+ spin_unlock_irq(&crtc->dev->event_lock);
+ crtc->state->event = NULL;
+ }
+}
+
+static void ili9225_pipe_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 drm_framebuffer *fb = plane_state->fb;
+ struct device *dev = pipe->crtc.dev->dev;
+ struct mipi_dbi *dbi = &dbidev->dbi;
+ struct drm_rect rect = {
+ .x1 = 0,
+ .x2 = fb->width,
+ .y1 = 0,
+ .y2 = fb->height,
+ };
+ int ret, idx;
+ u8 am_id;
+
+ if (!drm_dev_enter(pipe->crtc.dev, &idx))
+ return;
+
+ DRM_DEBUG_KMS("\n");
+
+ mipi_dbi_hw_reset(dbi);
+
+ /*
+ * There don't seem to be two example init sequences that match, so
+ * using the one from the popular Arduino library for this display.
+ * https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp
+ */
+
+ ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
+ if (ret) {
+ DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
+ goto out_exit;
+ }
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
+
+ msleep(40);
+
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
+
+ msleep(10);
+
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
+
+ msleep(50);
+
+ switch (dbidev->rotation) {
+ default:
+ am_id = 0x30;
+ break;
+ case 90:
+ am_id = 0x18;
+ break;
+ case 180:
+ am_id = 0x00;
+ break;
+ case 270:
+ am_id = 0x28;
+ break;
+ }
+ ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
+ ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
+ ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
+ ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
+ ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
+ ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
+ ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
+ ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
+ ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
+ ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
+ ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
+
+ ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
+ ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
+ ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
+ ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
+ ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
+ ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
+
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
+ ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
+
+ ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
+
+ msleep(50);
+
+ ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
+
+ dbidev->enabled = true;
+ ili9225_fb_dirty(fb, &rect);
+out_exit:
+ drm_dev_exit(idx);
+}
+
+static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
+{
+ struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
+ struct mipi_dbi *dbi = &dbidev->dbi;
+
+ DRM_DEBUG_KMS("\n");
+
+ /*
+ * This callback is not protected by drm_dev_enter/exit since we want to
+ * turn off the display on regular driver unload. It's highly unlikely
+ * that the underlying SPI controller is gone should this be called after
+ * unplug.
+ */
+
+ if (!dbidev->enabled)
+ return;
+
+ ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
+ msleep(50);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
+ msleep(50);
+ ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
+
+ dbidev->enabled = false;
+}
+
+static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
+ size_t num)
+{
+ struct spi_device *spi = dbi->spi;
+ unsigned int bpw = 8;
+ u32 speed_hz;
+ int ret;
+
+ gpiod_set_value_cansleep(dbi->dc, 0);
+ speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
+ ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
+ if (ret || !num)
+ return ret;
+
+ if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
+ bpw = 16;
+
+ gpiod_set_value_cansleep(dbi->dc, 1);
+ speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
+
+ return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
+}
+
+static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
+ .enable = ili9225_pipe_enable,
+ .disable = ili9225_pipe_disable,
+ .update = ili9225_pipe_update,
+ .prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+};
+
+static const struct drm_display_mode ili9225_mode = {
+ DRM_SIMPLE_MODE(176, 220, 35, 44),
+};
+
+DEFINE_DRM_GEM_CMA_FOPS(ili9225_fops);
+
+static struct drm_driver ili9225_driver = {
+ .driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
+ .fops = &ili9225_fops,
+ .release = mipi_dbi_release,
+ DRM_GEM_CMA_VMAP_DRIVER_OPS,
+ .name = "ili9225",
+ .desc = "Ilitek ILI9225",
+ .date = "20171106",
+ .major = 1,
+ .minor = 0,
+};
+
+static const struct of_device_id ili9225_of_match[] = {
+ { .compatible = "vot,v220hf01a-t" },
+ {},
+};
+MODULE_DEVICE_TABLE(of, ili9225_of_match);
+
+static const struct spi_device_id ili9225_id[] = {
+ { "v220hf01a-t", 0 },
+ { },
+};
+MODULE_DEVICE_TABLE(spi, ili9225_id);
+
+static int ili9225_probe(struct spi_device *spi)
+{
+ struct device *dev = &spi->dev;
+ struct mipi_dbi_dev *dbidev;
+ struct drm_device *drm;
+ struct mipi_dbi *dbi;
+ struct gpio_desc *rs;
+ u32 rotation = 0;
+ int ret;
+
+ dbidev = kzalloc(sizeof(*dbidev), GFP_KERNEL);
+ if (!dbidev)
+ return -ENOMEM;
+
+ dbi = &dbidev->dbi;
+ drm = &dbidev->drm;
+ ret = devm_drm_dev_init(dev, drm, &ili9225_driver);
+ if (ret) {
+ kfree(dbidev);
+ return ret;
+ }
+
+ drm_mode_config_init(drm);
+
+ dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
+ if (IS_ERR(dbi->reset)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
+ return PTR_ERR(dbi->reset);
+ }
+
+ rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
+ if (IS_ERR(rs)) {
+ DRM_DEV_ERROR(dev, "Failed to get gpio 'rs'\n");
+ return PTR_ERR(rs);
+ }
+
+ device_property_read_u32(dev, "rotation", &rotation);
+
+ ret = mipi_dbi_spi_init(spi, dbi, rs);
+ if (ret)
+ return ret;
+
+ /* override the command function set in mipi_dbi_spi_init() */
+ dbi->command = ili9225_dbi_command;
+
+ ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation);
+ 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 ili9225_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 ili9225_shutdown(struct spi_device *spi)
+{
+ drm_atomic_helper_shutdown(spi_get_drvdata(spi));
+}
+
+static struct spi_driver ili9225_spi_driver = {
+ .driver = {
+ .name = "ili9225",
+ .owner = THIS_MODULE,
+ .of_match_table = ili9225_of_match,
+ },
+ .id_table = ili9225_id,
+ .probe = ili9225_probe,
+ .remove = ili9225_remove,
+ .shutdown = ili9225_shutdown,
+};
+module_spi_driver(ili9225_spi_driver);
+
+MODULE_DESCRIPTION("Ilitek ILI9225 DRM driver");
+MODULE_AUTHOR("David Lechner <david@lechnology.com>");
+MODULE_LICENSE("GPL");