456 lines
13 KiB
C
456 lines
13 KiB
C
// SPDX-License-Identifier: GPL-2.0-or-later
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/*
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* DRM driver for Ilitek ILI9225 panels
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*
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* Copyright 2017 David Lechner <david@lechnology.com>
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*
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* Some code copied from mipi-dbi.c
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* Copyright 2016 Noralf Trønnes
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*/
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#include <linux/delay.h>
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#include <linux/dma-buf.h>
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/property.h>
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#include <linux/spi/spi.h>
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#include <video/mipi_display.h>
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#include <drm/drm_atomic_helper.h>
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#include <drm/drm_damage_helper.h>
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#include <drm/drm_drv.h>
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#include <drm/drm_fb_dma_helper.h>
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#include <drm/drm_fbdev_generic.h>
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#include <drm/drm_fourcc.h>
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#include <drm/drm_framebuffer.h>
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#include <drm/drm_gem_atomic_helper.h>
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#include <drm/drm_gem_dma_helper.h>
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#include <drm/drm_gem_framebuffer_helper.h>
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#include <drm/drm_managed.h>
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#include <drm/drm_mipi_dbi.h>
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#include <drm/drm_rect.h>
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#define ILI9225_DRIVER_READ_CODE 0x00
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#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01
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#define ILI9225_LCD_AC_DRIVING_CONTROL 0x02
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#define ILI9225_ENTRY_MODE 0x03
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#define ILI9225_DISPLAY_CONTROL_1 0x07
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#define ILI9225_BLANK_PERIOD_CONTROL_1 0x08
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#define ILI9225_FRAME_CYCLE_CONTROL 0x0b
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#define ILI9225_INTERFACE_CONTROL 0x0c
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#define ILI9225_OSCILLATION_CONTROL 0x0f
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#define ILI9225_POWER_CONTROL_1 0x10
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#define ILI9225_POWER_CONTROL_2 0x11
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#define ILI9225_POWER_CONTROL_3 0x12
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#define ILI9225_POWER_CONTROL_4 0x13
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#define ILI9225_POWER_CONTROL_5 0x14
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#define ILI9225_VCI_RECYCLING 0x15
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#define ILI9225_RAM_ADDRESS_SET_1 0x20
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#define ILI9225_RAM_ADDRESS_SET_2 0x21
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#define ILI9225_WRITE_DATA_TO_GRAM 0x22
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#define ILI9225_SOFTWARE_RESET 0x28
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#define ILI9225_GATE_SCAN_CONTROL 0x30
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#define ILI9225_VERTICAL_SCROLL_1 0x31
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#define ILI9225_VERTICAL_SCROLL_2 0x32
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#define ILI9225_VERTICAL_SCROLL_3 0x33
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#define ILI9225_PARTIAL_DRIVING_POS_1 0x34
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#define ILI9225_PARTIAL_DRIVING_POS_2 0x35
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#define ILI9225_HORIZ_WINDOW_ADDR_1 0x36
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#define ILI9225_HORIZ_WINDOW_ADDR_2 0x37
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#define ILI9225_VERT_WINDOW_ADDR_1 0x38
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#define ILI9225_VERT_WINDOW_ADDR_2 0x39
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#define ILI9225_GAMMA_CONTROL_1 0x50
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#define ILI9225_GAMMA_CONTROL_2 0x51
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#define ILI9225_GAMMA_CONTROL_3 0x52
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#define ILI9225_GAMMA_CONTROL_4 0x53
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#define ILI9225_GAMMA_CONTROL_5 0x54
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#define ILI9225_GAMMA_CONTROL_6 0x55
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#define ILI9225_GAMMA_CONTROL_7 0x56
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#define ILI9225_GAMMA_CONTROL_8 0x57
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#define ILI9225_GAMMA_CONTROL_9 0x58
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#define ILI9225_GAMMA_CONTROL_10 0x59
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static inline int ili9225_command(struct mipi_dbi *dbi, u8 cmd, u16 data)
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{
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u8 par[2] = { data >> 8, data & 0xff };
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return mipi_dbi_command_buf(dbi, cmd, par, 2);
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}
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static void ili9225_fb_dirty(struct iosys_map *src, struct drm_framebuffer *fb,
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struct drm_rect *rect)
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{
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struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(fb->dev);
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unsigned int height = rect->y2 - rect->y1;
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unsigned int width = rect->x2 - rect->x1;
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struct mipi_dbi *dbi = &dbidev->dbi;
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bool swap = dbi->swap_bytes;
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u16 x_start, y_start;
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u16 x1, x2, y1, y2;
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int ret = 0;
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bool full;
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void *tr;
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full = width == fb->width && height == fb->height;
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DRM_DEBUG_KMS("Flushing [FB:%d] " DRM_RECT_FMT "\n", fb->base.id, DRM_RECT_ARG(rect));
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if (!dbi->dc || !full || swap ||
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fb->format->format == DRM_FORMAT_XRGB8888) {
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tr = dbidev->tx_buf;
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ret = mipi_dbi_buf_copy(tr, src, fb, rect, swap);
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if (ret)
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goto err_msg;
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} else {
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tr = src->vaddr; /* TODO: Use mapping abstraction properly */
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}
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switch (dbidev->rotation) {
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default:
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x1 = rect->x1;
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x2 = rect->x2 - 1;
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y1 = rect->y1;
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y2 = rect->y2 - 1;
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x_start = x1;
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y_start = y1;
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break;
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case 90:
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x1 = rect->y1;
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x2 = rect->y2 - 1;
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y1 = fb->width - rect->x2;
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y2 = fb->width - rect->x1 - 1;
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x_start = x1;
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y_start = y2;
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break;
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case 180:
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x1 = fb->width - rect->x2;
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x2 = fb->width - rect->x1 - 1;
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y1 = fb->height - rect->y2;
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y2 = fb->height - rect->y1 - 1;
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x_start = x2;
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y_start = y2;
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break;
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case 270:
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x1 = fb->height - rect->y2;
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x2 = fb->height - rect->y1 - 1;
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y1 = rect->x1;
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y2 = rect->x2 - 1;
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x_start = x2;
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y_start = y1;
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break;
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}
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ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
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ili9225_command(dbi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
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ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_1, y2);
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ili9225_command(dbi, ILI9225_VERT_WINDOW_ADDR_2, y1);
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ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, x_start);
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ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, y_start);
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ret = mipi_dbi_command_buf(dbi, ILI9225_WRITE_DATA_TO_GRAM, tr,
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width * height * 2);
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err_msg:
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if (ret)
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dev_err_once(fb->dev->dev, "Failed to update display %d\n", ret);
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}
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static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
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struct drm_plane_state *old_state)
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{
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struct drm_plane_state *state = pipe->plane.state;
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struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(state);
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struct drm_framebuffer *fb = state->fb;
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struct drm_rect rect;
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int idx;
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if (!pipe->crtc.state->active)
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return;
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if (!drm_dev_enter(fb->dev, &idx))
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return;
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if (drm_atomic_helper_damage_merged(old_state, state, &rect))
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ili9225_fb_dirty(&shadow_plane_state->data[0], fb, &rect);
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drm_dev_exit(idx);
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}
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static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
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struct drm_crtc_state *crtc_state,
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struct drm_plane_state *plane_state)
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{
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struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
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struct drm_shadow_plane_state *shadow_plane_state = to_drm_shadow_plane_state(plane_state);
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struct drm_framebuffer *fb = plane_state->fb;
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struct device *dev = pipe->crtc.dev->dev;
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struct mipi_dbi *dbi = &dbidev->dbi;
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struct drm_rect rect = {
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.x1 = 0,
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.x2 = fb->width,
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.y1 = 0,
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.y2 = fb->height,
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};
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int ret, idx;
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u8 am_id;
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if (!drm_dev_enter(pipe->crtc.dev, &idx))
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return;
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DRM_DEBUG_KMS("\n");
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mipi_dbi_hw_reset(dbi);
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/*
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* There don't seem to be two example init sequences that match, so
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* using the one from the popular Arduino library for this display.
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* https://github.com/Nkawu/TFT_22_ILI9225/blob/master/src/TFT_22_ILI9225.cpp
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*/
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ret = ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0000);
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if (ret) {
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DRM_DEV_ERROR(dev, "Error sending command %d\n", ret);
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goto out_exit;
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}
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ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0000);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x0000);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x0000);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x0000);
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msleep(40);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0018);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_3, 0x6121);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_4, 0x006f);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_5, 0x495f);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0800);
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msleep(10);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x103b);
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msleep(50);
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switch (dbidev->rotation) {
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default:
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am_id = 0x30;
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break;
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case 90:
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am_id = 0x18;
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break;
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case 180:
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am_id = 0x00;
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break;
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case 270:
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am_id = 0x28;
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break;
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}
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ili9225_command(dbi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
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ili9225_command(dbi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
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ili9225_command(dbi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
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ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
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ili9225_command(dbi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
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ili9225_command(dbi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
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ili9225_command(dbi, ILI9225_INTERFACE_CONTROL, 0x0000);
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ili9225_command(dbi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
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ili9225_command(dbi, ILI9225_VCI_RECYCLING, 0x0020);
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ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
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ili9225_command(dbi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
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ili9225_command(dbi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
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ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
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ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
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ili9225_command(dbi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
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ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
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ili9225_command(dbi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_1, 0x0000);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_2, 0x0808);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_3, 0x080a);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_4, 0x000a);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_6, 0x0808);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_7, 0x0000);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_9, 0x0710);
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ili9225_command(dbi, ILI9225_GAMMA_CONTROL_10, 0x0710);
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ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
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msleep(50);
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ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
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ili9225_fb_dirty(&shadow_plane_state->data[0], fb, &rect);
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out_exit:
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drm_dev_exit(idx);
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}
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static void ili9225_pipe_disable(struct drm_simple_display_pipe *pipe)
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{
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struct mipi_dbi_dev *dbidev = drm_to_mipi_dbi_dev(pipe->crtc.dev);
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struct mipi_dbi *dbi = &dbidev->dbi;
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DRM_DEBUG_KMS("\n");
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/*
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* This callback is not protected by drm_dev_enter/exit since we want to
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* turn off the display on regular driver unload. It's highly unlikely
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* that the underlying SPI controller is gone should this be called after
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* unplug.
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*/
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ili9225_command(dbi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
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msleep(50);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_2, 0x0007);
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msleep(50);
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ili9225_command(dbi, ILI9225_POWER_CONTROL_1, 0x0a02);
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}
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static int ili9225_dbi_command(struct mipi_dbi *dbi, u8 *cmd, u8 *par,
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size_t num)
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{
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struct spi_device *spi = dbi->spi;
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unsigned int bpw = 8;
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u32 speed_hz;
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int ret;
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gpiod_set_value_cansleep(dbi->dc, 0);
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speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
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ret = mipi_dbi_spi_transfer(spi, speed_hz, 8, cmd, 1);
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if (ret || !num)
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return ret;
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if (*cmd == ILI9225_WRITE_DATA_TO_GRAM && !dbi->swap_bytes)
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bpw = 16;
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gpiod_set_value_cansleep(dbi->dc, 1);
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speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
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return mipi_dbi_spi_transfer(spi, speed_hz, bpw, par, num);
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}
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static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
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.mode_valid = mipi_dbi_pipe_mode_valid,
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.enable = ili9225_pipe_enable,
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.disable = ili9225_pipe_disable,
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.update = ili9225_pipe_update,
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.begin_fb_access = mipi_dbi_pipe_begin_fb_access,
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.end_fb_access = mipi_dbi_pipe_end_fb_access,
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.reset_plane = mipi_dbi_pipe_reset_plane,
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.duplicate_plane_state = mipi_dbi_pipe_duplicate_plane_state,
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.destroy_plane_state = mipi_dbi_pipe_destroy_plane_state,
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};
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static const struct drm_display_mode ili9225_mode = {
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DRM_SIMPLE_MODE(176, 220, 35, 44),
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};
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DEFINE_DRM_GEM_DMA_FOPS(ili9225_fops);
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static const struct drm_driver ili9225_driver = {
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.driver_features = DRIVER_GEM | DRIVER_MODESET | DRIVER_ATOMIC,
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.fops = &ili9225_fops,
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DRM_GEM_DMA_DRIVER_OPS_VMAP,
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.name = "ili9225",
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.desc = "Ilitek ILI9225",
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.date = "20171106",
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.major = 1,
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.minor = 0,
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};
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static const struct of_device_id ili9225_of_match[] = {
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{ .compatible = "vot,v220hf01a-t" },
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{},
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};
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MODULE_DEVICE_TABLE(of, ili9225_of_match);
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static const struct spi_device_id ili9225_id[] = {
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{ "v220hf01a-t", 0 },
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{ },
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};
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MODULE_DEVICE_TABLE(spi, ili9225_id);
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static int ili9225_probe(struct spi_device *spi)
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{
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struct device *dev = &spi->dev;
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struct mipi_dbi_dev *dbidev;
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struct drm_device *drm;
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struct mipi_dbi *dbi;
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struct gpio_desc *rs;
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u32 rotation = 0;
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int ret;
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dbidev = devm_drm_dev_alloc(dev, &ili9225_driver,
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struct mipi_dbi_dev, drm);
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if (IS_ERR(dbidev))
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return PTR_ERR(dbidev);
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dbi = &dbidev->dbi;
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drm = &dbidev->drm;
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dbi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
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if (IS_ERR(dbi->reset))
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return dev_err_probe(dev, PTR_ERR(dbi->reset), "Failed to get GPIO 'reset'\n");
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rs = devm_gpiod_get(dev, "rs", GPIOD_OUT_LOW);
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if (IS_ERR(rs))
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return dev_err_probe(dev, PTR_ERR(rs), "Failed to get GPIO 'rs'\n");
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device_property_read_u32(dev, "rotation", &rotation);
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ret = mipi_dbi_spi_init(spi, dbi, rs);
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if (ret)
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return ret;
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/* override the command function set in mipi_dbi_spi_init() */
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dbi->command = ili9225_dbi_command;
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ret = mipi_dbi_dev_init(dbidev, &ili9225_pipe_funcs, &ili9225_mode, rotation);
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if (ret)
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return ret;
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drm_mode_config_reset(drm);
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ret = drm_dev_register(drm, 0);
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if (ret)
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return ret;
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spi_set_drvdata(spi, drm);
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drm_fbdev_generic_setup(drm, 0);
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return 0;
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|
}
|
|
|
|
static void ili9225_remove(struct spi_device *spi)
|
|
{
|
|
struct drm_device *drm = spi_get_drvdata(spi);
|
|
|
|
drm_dev_unplug(drm);
|
|
drm_atomic_helper_shutdown(drm);
|
|
}
|
|
|
|
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");
|