drm/tinydrm: add driver for ILI9225 panels
This adds a new driver for display panels based on the Ilitek ILI9225 controller. This was developed for a no-name panel with a red PCB that is commonly marketed for Arduino. See <https://github.com/Nkawu/TFT_22_ILI9225>. Signed-off-by: David Lechner <david@lechnology.com> Reviewed-by: Noralf Trønnes <noralf@tronnes.org> Signed-off-by: Noralf Trønnes <noralf@tronnes.org> Link: https://patchwork.freedesktop.org/patch/msgid/1511122328-31133-5-git-send-email-david@lechnology.com
This commit is contained in:
David Lechner
Noralf Trønnes
parent
13deee8111
commit
b57e8b7661
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@ -4370,6 +4370,12 @@ T: git git://anongit.freedesktop.org/drm/drm-misc
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S: Maintained
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F: drivers/gpu/drm/tve200/
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DRM DRIVER FOR ILITEK ILI9225 PANELS
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M: David Lechner <david@lechnology.com>
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S: Maintained
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F: drivers/gpu/drm/tinydrm/ili9225.c
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F: Documentation/devicetree/bindings/display/ili9225.txt
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DRM DRIVER FOR INTEL I810 VIDEO CARDS
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S: Orphan / Obsolete
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F: drivers/gpu/drm/i810/
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@ -12,6 +12,16 @@ menuconfig DRM_TINYDRM
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config TINYDRM_MIPI_DBI
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tristate
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config TINYDRM_ILI9225
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tristate "DRM support for ILI9225 display panels"
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depends on DRM_TINYDRM && SPI
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select TINYDRM_MIPI_DBI
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help
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DRM driver for the following Ilitek ILI9225 panels:
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* No-name 2.2" color screen module
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If M is selected the module will be called ili9225.
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config TINYDRM_MI0283QT
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tristate "DRM support for MI0283QT"
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depends on DRM_TINYDRM && SPI
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@ -4,6 +4,7 @@ obj-$(CONFIG_DRM_TINYDRM) += core/
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obj-$(CONFIG_TINYDRM_MIPI_DBI) += mipi-dbi.o
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# Displays
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obj-$(CONFIG_TINYDRM_ILI9225) += ili9225.o
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obj-$(CONFIG_TINYDRM_MI0283QT) += mi0283qt.o
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obj-$(CONFIG_TINYDRM_REPAPER) += repaper.o
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obj-$(CONFIG_TINYDRM_ST7586) += st7586.o
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@ -0,0 +1,468 @@
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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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* This program is free software; you can redistribute it and/or modify
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* it under the terms of the GNU General Public License as published by
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* the Free Software Foundation; either version 2 of the License, or
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* (at your option) any later version.
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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_gem_framebuffer_helper.h>
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#include <drm/tinydrm/mipi-dbi.h>
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#include <drm/tinydrm/tinydrm-helpers.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 *mipi, 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(mipi, cmd, par, 2);
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}
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static int ili9225_fb_dirty(struct drm_framebuffer *fb,
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struct drm_file *file_priv, unsigned int flags,
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unsigned int color, struct drm_clip_rect *clips,
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unsigned int num_clips)
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{
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struct drm_gem_cma_object *cma_obj = drm_fb_cma_get_gem_obj(fb, 0);
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struct tinydrm_device *tdev = fb->dev->dev_private;
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struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
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bool swap = mipi->swap_bytes;
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struct drm_clip_rect clip;
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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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mutex_lock(&tdev->dirty_lock);
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if (!mipi->enabled)
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goto out_unlock;
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/* fbdev can flush even when we're not interested */
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if (tdev->pipe.plane.fb != fb)
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goto out_unlock;
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full = tinydrm_merge_clips(&clip, clips, num_clips, flags,
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fb->width, fb->height);
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DRM_DEBUG("Flushing [FB:%d] x1=%u, x2=%u, y1=%u, y2=%u\n", fb->base.id,
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clip.x1, clip.x2, clip.y1, clip.y2);
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if (!mipi->dc || !full || swap ||
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fb->format->format == DRM_FORMAT_XRGB8888) {
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tr = mipi->tx_buf;
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ret = mipi_dbi_buf_copy(mipi->tx_buf, fb, &clip, swap);
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if (ret)
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goto out_unlock;
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} else {
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tr = cma_obj->vaddr;
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}
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switch (mipi->rotation) {
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default:
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x1 = clip.x1;
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x2 = clip.x2 - 1;
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y1 = clip.y1;
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y2 = clip.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 = clip.y1;
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x2 = clip.y2 - 1;
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y1 = fb->width - clip.x2;
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y2 = fb->width - clip.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 - clip.x2;
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x2 = fb->width - clip.x1 - 1;
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y1 = fb->height - clip.y2;
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y2 = fb->height - clip.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 - clip.y2;
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x2 = fb->height - clip.y1 - 1;
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y1 = clip.x1;
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y2 = clip.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(mipi, ILI9225_HORIZ_WINDOW_ADDR_1, x2);
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ili9225_command(mipi, ILI9225_HORIZ_WINDOW_ADDR_2, x1);
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ili9225_command(mipi, ILI9225_VERT_WINDOW_ADDR_1, y2);
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ili9225_command(mipi, ILI9225_VERT_WINDOW_ADDR_2, y1);
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ili9225_command(mipi, ILI9225_RAM_ADDRESS_SET_1, x_start);
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ili9225_command(mipi, ILI9225_RAM_ADDRESS_SET_2, y_start);
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ret = mipi_dbi_command_buf(mipi, ILI9225_WRITE_DATA_TO_GRAM, tr,
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(clip.x2 - clip.x1) * (clip.y2 - clip.y1) * 2);
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out_unlock:
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mutex_unlock(&tdev->dirty_lock);
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if (ret)
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dev_err_once(fb->dev->dev, "Failed to update display %d\n",
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ret);
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return ret;
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}
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static const struct drm_framebuffer_funcs ili9225_fb_funcs = {
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.destroy = drm_gem_fb_destroy,
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.create_handle = drm_gem_fb_create_handle,
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.dirty = ili9225_fb_dirty,
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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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{
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struct tinydrm_device *tdev = pipe_to_tinydrm(pipe);
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struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
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struct drm_framebuffer *fb = pipe->plane.fb;
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struct device *dev = tdev->drm->dev;
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int ret;
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u8 am_id;
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DRM_DEBUG_KMS("\n");
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mipi_dbi_hw_reset(mipi);
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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(mipi, 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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return;
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}
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ili9225_command(mipi, ILI9225_POWER_CONTROL_2, 0x0000);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_3, 0x0000);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_4, 0x0000);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_5, 0x0000);
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msleep(40);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_2, 0x0018);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_3, 0x6121);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_4, 0x006f);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_5, 0x495f);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_1, 0x0800);
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msleep(10);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_2, 0x103b);
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msleep(50);
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switch (mipi->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(mipi, ILI9225_DRIVER_OUTPUT_CONTROL, 0x011c);
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ili9225_command(mipi, ILI9225_LCD_AC_DRIVING_CONTROL, 0x0100);
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ili9225_command(mipi, ILI9225_ENTRY_MODE, 0x1000 | am_id);
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ili9225_command(mipi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
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ili9225_command(mipi, ILI9225_BLANK_PERIOD_CONTROL_1, 0x0808);
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ili9225_command(mipi, ILI9225_FRAME_CYCLE_CONTROL, 0x1100);
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ili9225_command(mipi, ILI9225_INTERFACE_CONTROL, 0x0000);
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ili9225_command(mipi, ILI9225_OSCILLATION_CONTROL, 0x0d01);
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ili9225_command(mipi, ILI9225_VCI_RECYCLING, 0x0020);
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ili9225_command(mipi, ILI9225_RAM_ADDRESS_SET_1, 0x0000);
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ili9225_command(mipi, ILI9225_RAM_ADDRESS_SET_2, 0x0000);
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ili9225_command(mipi, ILI9225_GATE_SCAN_CONTROL, 0x0000);
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ili9225_command(mipi, ILI9225_VERTICAL_SCROLL_1, 0x00db);
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ili9225_command(mipi, ILI9225_VERTICAL_SCROLL_2, 0x0000);
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ili9225_command(mipi, ILI9225_VERTICAL_SCROLL_3, 0x0000);
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ili9225_command(mipi, ILI9225_PARTIAL_DRIVING_POS_1, 0x00db);
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ili9225_command(mipi, ILI9225_PARTIAL_DRIVING_POS_2, 0x0000);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_1, 0x0000);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_2, 0x0808);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_3, 0x080a);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_4, 0x000a);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_5, 0x0a08);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_6, 0x0808);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_7, 0x0000);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_8, 0x0a00);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_9, 0x0710);
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ili9225_command(mipi, ILI9225_GAMMA_CONTROL_10, 0x0710);
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ili9225_command(mipi, ILI9225_DISPLAY_CONTROL_1, 0x0012);
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msleep(50);
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ili9225_command(mipi, ILI9225_DISPLAY_CONTROL_1, 0x1017);
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mipi->enabled = true;
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if (fb)
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fb->funcs->dirty(fb, NULL, 0, 0, NULL, 0);
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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 tinydrm_device *tdev = pipe_to_tinydrm(pipe);
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struct mipi_dbi *mipi = mipi_dbi_from_tinydrm(tdev);
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DRM_DEBUG_KMS("\n");
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if (!mipi->enabled)
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return;
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ili9225_command(mipi, ILI9225_DISPLAY_CONTROL_1, 0x0000);
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msleep(50);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_2, 0x0007);
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msleep(50);
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ili9225_command(mipi, ILI9225_POWER_CONTROL_1, 0x0a02);
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mipi->enabled = false;
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}
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static int ili9225_dbi_command(struct mipi_dbi *mipi, u8 cmd, u8 *par,
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size_t num)
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{
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struct spi_device *spi = mipi->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(mipi->dc, 0);
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speed_hz = mipi_dbi_spi_cmd_max_speed(spi, 1);
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ret = tinydrm_spi_transfer(spi, speed_hz, NULL, 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 && !mipi->swap_bytes)
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bpw = 16;
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gpiod_set_value_cansleep(mipi->dc, 1);
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speed_hz = mipi_dbi_spi_cmd_max_speed(spi, num);
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return tinydrm_spi_transfer(spi, speed_hz, NULL, bpw, par, num);
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}
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static const u32 ili9225_formats[] = {
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DRM_FORMAT_RGB565,
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DRM_FORMAT_XRGB8888,
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};
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static int ili9225_init(struct device *dev, struct mipi_dbi *mipi,
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const struct drm_simple_display_pipe_funcs *pipe_funcs,
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struct drm_driver *driver,
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const struct drm_display_mode *mode,
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unsigned int rotation)
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{
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size_t bufsize = mode->vdisplay * mode->hdisplay * sizeof(u16);
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struct tinydrm_device *tdev = &mipi->tinydrm;
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int ret;
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if (!mipi->command)
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return -EINVAL;
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mutex_init(&mipi->cmdlock);
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mipi->tx_buf = devm_kmalloc(dev, bufsize, GFP_KERNEL);
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if (!mipi->tx_buf)
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return -ENOMEM;
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ret = devm_tinydrm_init(dev, tdev, &ili9225_fb_funcs, driver);
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if (ret)
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return ret;
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|
||||
ret = tinydrm_display_pipe_init(tdev, pipe_funcs,
|
||||
DRM_MODE_CONNECTOR_VIRTUAL,
|
||||
ili9225_formats,
|
||||
ARRAY_SIZE(ili9225_formats), mode,
|
||||
rotation);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
tdev->drm->mode_config.preferred_depth = 16;
|
||||
mipi->rotation = rotation;
|
||||
|
||||
drm_mode_config_reset(tdev->drm);
|
||||
|
||||
DRM_DEBUG_KMS("preferred_depth=%u, rotation = %u\n",
|
||||
tdev->drm->mode_config.preferred_depth, rotation);
|
||||
|
||||
return 0;
|
||||
}
|
||||
|
||||
static const struct drm_simple_display_pipe_funcs ili9225_pipe_funcs = {
|
||||
.enable = ili9225_pipe_enable,
|
||||
.disable = ili9225_pipe_disable,
|
||||
.update = tinydrm_display_pipe_update,
|
||||
.prepare_fb = tinydrm_display_pipe_prepare_fb,
|
||||
};
|
||||
|
||||
static const struct drm_display_mode ili9225_mode = {
|
||||
TINYDRM_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_PRIME |
|
||||
DRIVER_ATOMIC,
|
||||
.fops = &ili9225_fops,
|
||||
TINYDRM_GEM_DRIVER_OPS,
|
||||
.lastclose = tinydrm_lastclose,
|
||||
.name = "ili9225",
|
||||
.desc = "Ilitek ILI9225",
|
||||
.date = "20171106",
|
||||
.major = 1,
|
||||
.minor = 0,
|
||||
};
|
||||
|
||||
static const struct of_device_id ili9225_of_match[] = {
|
||||
{ .compatible = "ilitek,ili9225-2.2in-176x220" },
|
||||
{},
|
||||
};
|
||||
MODULE_DEVICE_TABLE(of, ili9225_of_match);
|
||||
|
||||
static const struct spi_device_id ili9225_id[] = {
|
||||
{ "ili9225-2.2in-176x220", 0 },
|
||||
{ },
|
||||
};
|
||||
MODULE_DEVICE_TABLE(spi, ili9225_id);
|
||||
|
||||
static int ili9225_probe(struct spi_device *spi)
|
||||
{
|
||||
struct device *dev = &spi->dev;
|
||||
struct mipi_dbi *mipi;
|
||||
struct gpio_desc *rs;
|
||||
u32 rotation = 0;
|
||||
int ret;
|
||||
|
||||
mipi = devm_kzalloc(dev, sizeof(*mipi), GFP_KERNEL);
|
||||
if (!mipi)
|
||||
return -ENOMEM;
|
||||
|
||||
mipi->reset = devm_gpiod_get(dev, "reset", GPIOD_OUT_HIGH);
|
||||
if (IS_ERR(mipi->reset)) {
|
||||
DRM_DEV_ERROR(dev, "Failed to get gpio 'reset'\n");
|
||||
return PTR_ERR(mipi->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, mipi, rs);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
/* override the command function set in mipi_dbi_spi_init() */
|
||||
mipi->command = ili9225_dbi_command;
|
||||
|
||||
ret = ili9225_init(&spi->dev, mipi, &ili9225_pipe_funcs,
|
||||
&ili9225_driver, &ili9225_mode, rotation);
|
||||
if (ret)
|
||||
return ret;
|
||||
|
||||
spi_set_drvdata(spi, mipi);
|
||||
|
||||
return devm_tinydrm_register(&mipi->tinydrm);
|
||||
}
|
||||
|
||||
static void ili9225_shutdown(struct spi_device *spi)
|
||||
{
|
||||
struct mipi_dbi *mipi = spi_get_drvdata(spi);
|
||||
|
||||
tinydrm_shutdown(&mipi->tinydrm);
|
||||
}
|
||||
|
||||
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,
|
||||
.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");
|
||||
Loading…
Reference in New Issue