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20ea6adbf1
Build system: x86_64 Build-tested: bcm2708, bcm2709, bcm2710, bcm2711 Run-tested: bcm2708/RPiB+, bcm2709/RPi3B, bcm2710/RPi3B, bcm2711/RPi4B Signed-off-by: Marty Jones <mj8263788@gmail.com> Signed-off-by: Álvaro Fernández Rojas <noltari@gmail.com>
332 lines
9.6 KiB
Diff
332 lines
9.6 KiB
Diff
From f493a1250d55c4a61d94f631757186e8beef9d90 Mon Sep 17 00:00:00 2001
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From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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Date: Wed, 26 Jan 2022 16:02:31 +0000
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Subject: [PATCH] drm/panel: Add panel driver for TDO Y17B based panels
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The Top DisplayOptoelectronics (TDO) T17B driver chip is used
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in the TL040HDS20CT panel (found in the Pimoroni HyperPixel4
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Square display) and potentially other displays.
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The driver chip supports SPI for configuration and DPI
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video data.
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Signed-off-by: Dave Stevenson <dave.stevenson@raspberrypi.com>
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---
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drivers/gpu/drm/panel/Kconfig | 11 +
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drivers/gpu/drm/panel/Makefile | 1 +
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drivers/gpu/drm/panel/panel-tdo-y17p.c | 279 +++++++++++++++++++++++++
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3 files changed, 291 insertions(+)
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create mode 100644 drivers/gpu/drm/panel/panel-tdo-y17p.c
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--- a/drivers/gpu/drm/panel/Kconfig
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+++ b/drivers/gpu/drm/panel/Kconfig
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@@ -560,6 +560,17 @@ config DRM_PANEL_SONY_ACX565AKM
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Say Y here if you want to enable support for the Sony ACX565AKM
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800x600 3.5" panel (found on the Nokia N900).
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+config DRM_PANEL_TPO_Y17P
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+ tristate "TDO Y17P-based panels"
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+ depends on OF && SPI
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+ depends on DRM_KMS_HELPER
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+ depends on DRM_KMS_CMA_HELPER
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+ depends on BACKLIGHT_CLASS_DEVICE
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+ select DRM_MIPI_DBI
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+ help
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+ Say Y if you want to enable support for panels based on the
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+ TDO Y17P controller.
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+
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config DRM_PANEL_TDO_TL070WSH30
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tristate "TDO TL070WSH30 DSI panel"
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depends on OF
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--- a/drivers/gpu/drm/panel/Makefile
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+++ b/drivers/gpu/drm/panel/Makefile
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@@ -58,6 +58,7 @@ obj-$(CONFIG_DRM_PANEL_SITRONIX_ST7789V)
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obj-$(CONFIG_DRM_PANEL_SONY_ACX424AKP) += panel-sony-acx424akp.o
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obj-$(CONFIG_DRM_PANEL_SONY_ACX565AKM) += panel-sony-acx565akm.o
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obj-$(CONFIG_DRM_PANEL_TDO_TL070WSH30) += panel-tdo-tl070wsh30.o
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+obj-$(CONFIG_DRM_PANEL_TPO_Y17P) += panel-tdo-y17p.o
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obj-$(CONFIG_DRM_PANEL_TPO_TD028TTEC1) += panel-tpo-td028ttec1.o
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obj-$(CONFIG_DRM_PANEL_TPO_TD043MTEA1) += panel-tpo-td043mtea1.o
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obj-$(CONFIG_DRM_PANEL_TPO_TPG110) += panel-tpo-tpg110.o
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--- /dev/null
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+++ b/drivers/gpu/drm/panel/panel-tdo-y17p.c
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@@ -0,0 +1,279 @@
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+// SPDX-License-Identifier: GPL-2.0-only
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+/*
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+ * TDO Y17P TFT LCD drm_panel driver.
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+ *
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+ * SPI configured DPI display controller
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+ * Copyright (C) 2022 Raspberry Pi Ltd
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+ *
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+ * Derived from drivers/drm/gpu/panel/panel-sitronix-st7789v.c
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+ * Copyright (C) 2017 Free Electrons
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+ */
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+
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+#include <drm/drm_modes.h>
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+#include <drm/drm_panel.h>
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+
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+#include <linux/bitops.h>
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+#include <linux/gpio/consumer.h>
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+#include <linux/media-bus-format.h>
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+#include <linux/module.h>
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+#include <linux/of_device.h>
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+#include <linux/regmap.h>
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+#include <linux/regulator/consumer.h>
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+#include <linux/spi/spi.h>
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+
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+#include <video/mipi_display.h>
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+#include <video/of_videomode.h>
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+#include <video/videomode.h>
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+
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+struct tdo_y17p {
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+ struct drm_panel panel;
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+ struct spi_device *spi;
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+ struct gpio_desc *reset;
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+ struct regulator *power;
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+ u32 bus_format;
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+};
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+
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+static const u16 panel_init[] = {
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+ 0x0ff, 0x1ff, 0x198, 0x106, 0x104, 0x101, 0x008, 0x110,
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+ 0x021, 0x109, 0x030, 0x102, 0x031, 0x100, 0x040, 0x110,
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+ 0x041, 0x155, 0x042, 0x102, 0x043, 0x109, 0x044, 0x107,
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+ 0x050, 0x178, 0x051, 0x178, 0x052, 0x100, 0x053, 0x16d,
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+ 0x060, 0x107, 0x061, 0x100, 0x062, 0x108, 0x063, 0x100,
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+ 0x0a0, 0x100, 0x0a1, 0x107, 0x0a2, 0x10c, 0x0a3, 0x10b,
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+ 0x0a4, 0x103, 0x0a5, 0x107, 0x0a6, 0x106, 0x0a7, 0x104,
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+ 0x0a8, 0x108, 0x0a9, 0x10c, 0x0aa, 0x113, 0x0ab, 0x106,
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+ 0x0ac, 0x10d, 0x0ad, 0x119, 0x0ae, 0x110, 0x0af, 0x100,
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+ 0x0c0, 0x100, 0x0c1, 0x107, 0x0c2, 0x10c, 0x0c3, 0x10b,
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+ 0x0c4, 0x103, 0x0c5, 0x107, 0x0c6, 0x107, 0x0c7, 0x104,
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+ 0x0c8, 0x108, 0x0c9, 0x10c, 0x0ca, 0x113, 0x0cb, 0x106,
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+ 0x0cc, 0x10d, 0x0cd, 0x118, 0x0ce, 0x110, 0x0cf, 0x100,
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+ 0x0ff, 0x1ff, 0x198, 0x106, 0x104, 0x106, 0x000, 0x120,
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+ 0x001, 0x10a, 0x002, 0x100, 0x003, 0x100, 0x004, 0x101,
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+ 0x005, 0x101, 0x006, 0x198, 0x007, 0x106, 0x008, 0x101,
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+ 0x009, 0x180, 0x00a, 0x100, 0x00b, 0x100, 0x00c, 0x101,
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+ 0x00d, 0x101, 0x00e, 0x100, 0x00f, 0x100, 0x010, 0x1f0,
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+ 0x011, 0x1f4, 0x012, 0x101, 0x013, 0x100, 0x014, 0x100,
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+ 0x015, 0x1c0, 0x016, 0x108, 0x017, 0x100, 0x018, 0x100,
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+ 0x019, 0x100, 0x01a, 0x100, 0x01b, 0x100, 0x01c, 0x100,
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+ 0x01d, 0x100, 0x020, 0x101, 0x021, 0x123, 0x022, 0x145,
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+ 0x023, 0x167, 0x024, 0x101, 0x025, 0x123, 0x026, 0x145,
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+ 0x027, 0x167, 0x030, 0x111, 0x031, 0x111, 0x032, 0x100,
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+ 0x033, 0x1ee, 0x034, 0x1ff, 0x035, 0x1bb, 0x036, 0x1aa,
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+ 0x037, 0x1dd, 0x038, 0x1cc, 0x039, 0x166, 0x03a, 0x177,
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+ 0x03b, 0x122, 0x03c, 0x122, 0x03d, 0x122, 0x03e, 0x122,
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+ 0x03f, 0x122, 0x040, 0x122, 0x052, 0x110, 0x053, 0x110,
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+ 0x0ff, 0x1ff, 0x198, 0x106, 0x104, 0x107, 0x018, 0x11d,
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+ 0x017, 0x122, 0x002, 0x177, 0x026, 0x1b2, 0x0e1, 0x179,
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+ 0x0ff, 0x1ff, 0x198, 0x106, 0x104, 0x100, 0x03a, 0x160,
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+ 0x035, 0x100, 0x011, 0x100,
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+};
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+
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+#define NUM_INIT_REGS ARRAY_SIZE(panel_init)
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+
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+static inline struct tdo_y17p *panel_to_tdo_y17p(struct drm_panel *panel)
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+{
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+ return container_of(panel, struct tdo_y17p, panel);
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+}
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+
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+static int tdo_y17p_write_msg(struct tdo_y17p *ctx, const u16 *msg, unsigned int len)
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+{
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+ struct spi_transfer xfer = { };
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+ struct spi_message spi;
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+
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+ spi_message_init(&spi);
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+
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+ xfer.tx_buf = msg;
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+ xfer.bits_per_word = 9;
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+ xfer.len = sizeof(u16) * len;
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+
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+ spi_message_add_tail(&xfer, &spi);
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+ return spi_sync(ctx->spi, &spi);
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+}
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+
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+static const struct drm_display_mode tdo_y17pe_720x720_mode = {
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+ .clock = 36720,
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+ .hdisplay = 720,
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+ .hsync_start = 720 + 20,
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+ .hsync_end = 720 + 20 + 20,
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+ .htotal = 720 + 20 + 20 + 40,
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+ .vdisplay = 720,
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+ .vsync_start = 720 + 15,
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+ .vsync_end = 720 + 15 + 15,
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+ .vtotal = 720 + 15 + 15 + 15,
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+ .flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_PVSYNC,
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+};
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+
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+static int tdo_y17p_get_modes(struct drm_panel *panel,
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+ struct drm_connector *connector)
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+{
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+ struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
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+ struct drm_display_mode *mode;
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+
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+ mode = drm_mode_duplicate(connector->dev, &tdo_y17pe_720x720_mode);
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+ if (!mode) {
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+ dev_err(panel->dev, "failed to add mode %ux%ux@%u\n",
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+ tdo_y17pe_720x720_mode.hdisplay,
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+ tdo_y17pe_720x720_mode.vdisplay,
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+ drm_mode_vrefresh(&tdo_y17pe_720x720_mode));
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+ return -ENOMEM;
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+ }
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+
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+ drm_mode_set_name(mode);
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+
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+ mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED;
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+ drm_mode_probed_add(connector, mode);
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+
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+ connector->display_info.width_mm = 72;
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+ connector->display_info.height_mm = 72;
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+ drm_display_info_set_bus_formats(&connector->display_info,
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+ &ctx->bus_format, 1);
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+ connector->display_info.bus_flags = 0;
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+
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+ return 1;
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+}
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+
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+static int tdo_y17p_prepare(struct drm_panel *panel)
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+{
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+ struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
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+ int ret;
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+
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+ ret = regulator_enable(ctx->power);
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+ if (ret)
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+ return ret;
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+
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+ ret = tdo_y17p_write_msg(ctx, panel_init, NUM_INIT_REGS);
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+
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+ msleep(120);
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+
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+ return ret;
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+}
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+
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+static int tdo_y17p_enable(struct drm_panel *panel)
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+{
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+ struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
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+ const u16 msg[] = { MIPI_DCS_SET_DISPLAY_ON };
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+ int ret;
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+
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+ ret = tdo_y17p_write_msg(ctx, msg, ARRAY_SIZE(msg));
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+
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+ return ret;
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+}
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+
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+static int tdo_y17p_disable(struct drm_panel *panel)
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+{
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+ struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
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+ const u16 msg[] = { MIPI_DCS_SET_DISPLAY_OFF };
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+ int ret;
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+
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+ ret = tdo_y17p_write_msg(ctx, msg, ARRAY_SIZE(msg));
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+
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+ return ret;
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+}
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+
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+static int tdo_y17p_unprepare(struct drm_panel *panel)
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+{
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+ struct tdo_y17p *ctx = panel_to_tdo_y17p(panel);
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+ const u16 msg[] = { MIPI_DCS_ENTER_SLEEP_MODE };
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+ int ret;
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+
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+ ret = tdo_y17p_write_msg(ctx, msg, ARRAY_SIZE(msg));
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+
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+ return ret;
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+}
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+
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+static const struct drm_panel_funcs tdo_y17p_drm_funcs = {
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+ .disable = tdo_y17p_disable,
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+ .enable = tdo_y17p_enable,
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+ .get_modes = tdo_y17p_get_modes,
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+ .prepare = tdo_y17p_prepare,
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+ .unprepare = tdo_y17p_unprepare,
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+};
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+
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+static const struct of_device_id tdo_y17p_of_match[] = {
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+ { .compatible = "tdo,tl040hds20ct",
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+ .data = (void *)MEDIA_BUS_FMT_BGR888_1X24,
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+ }, {
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+ .compatible = "pimoroni,hyperpixel4square",
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+ .data = (void *)MEDIA_BUS_FMT_BGR666_1X24_CPADHI,
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+ }, {
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+ .compatible = "tdo,y17p",
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+ .data = (void *)MEDIA_BUS_FMT_BGR888_1X24,
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+ }, {
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+ /* sentinel */
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+ }
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+};
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+MODULE_DEVICE_TABLE(of, tdo_y17p_of_match);
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+
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+static int tdo_y17p_probe(struct spi_device *spi)
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+{
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+ const struct of_device_id *id;
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+ struct tdo_y17p *ctx;
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+ int ret;
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+
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+ ctx = devm_kzalloc(&spi->dev, sizeof(*ctx), GFP_KERNEL);
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+ if (!ctx)
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+ return -ENOMEM;
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+
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+ id = of_match_node(tdo_y17p_of_match, spi->dev.of_node);
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+ if (!id)
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+ return -ENODEV;
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+
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+ ctx->bus_format = (u32)id->data;
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+
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+ spi_set_drvdata(spi, ctx);
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+ ctx->spi = spi;
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+
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+ drm_panel_init(&ctx->panel, &spi->dev, &tdo_y17p_drm_funcs,
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+ DRM_MODE_CONNECTOR_DPI);
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+
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+ ctx->power = devm_regulator_get(&spi->dev, "power");
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+ if (IS_ERR(ctx->power))
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+ return PTR_ERR(ctx->power);
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+
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+ ctx->reset = devm_gpiod_get_optional(&spi->dev, "reset", GPIOD_OUT_LOW);
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+ if (IS_ERR(ctx->reset)) {
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+ dev_err(&spi->dev, "Couldn't get our reset line\n");
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+ return PTR_ERR(ctx->reset);
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+ }
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+
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+ ret = drm_panel_of_backlight(&ctx->panel);
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+ if (ret)
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+ return ret;
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+
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+ drm_panel_add(&ctx->panel);
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+
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+ return 0;
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+}
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+
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+static int tdo_y17p_remove(struct spi_device *spi)
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+{
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+ struct tdo_y17p *ctx = spi_get_drvdata(spi);
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+
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+ drm_panel_remove(&ctx->panel);
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+
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+ return 0;
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+}
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+
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+static const struct spi_device_id tdo_y17p_ids[] = {
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+ { "tl040hds20ct", 0 },
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+ { "hyperpixel4square", 0 },
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+ { "y17p", 0 },
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+ { /* sentinel */ }
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+};
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+
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+MODULE_DEVICE_TABLE(spi, tdo_y17p_ids);
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+
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+static struct spi_driver tdo_y17p_driver = {
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+ .probe = tdo_y17p_probe,
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+ .remove = tdo_y17p_remove,
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+ .driver = {
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+ .name = "tdo_y17p",
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+ .of_match_table = tdo_y17p_of_match,
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+ },
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+ .id_table = tdo_y17p_ids,
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+};
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+module_spi_driver(tdo_y17p_driver);
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+
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+MODULE_AUTHOR("Dave Stevenson <dave.stevenson@raspberrypi.com>");
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+MODULE_DESCRIPTION("TDO Y17P LCD panel driver");
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+MODULE_LICENSE("GPL v2");
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