forked from Minki/linux
drm/panel: Add driver for the LG Philips LB035Q02 panel
This panel is used on the Gumstix Overo Palo35. The code is based on the omapdrm-specific panel-lgphilips-lb035q02 driver. Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com> Reviewed-by: Sam Ravnborg <sam@ravnborg.org> Signed-off-by: Sam Ravnborg <sam@ravnborg.org> Link: https://patchwork.freedesktop.org/patch/msgid/20190813201101.30980-5-laurent.pinchart@ideasonboard.com
This commit is contained in:
Laurent Pinchart
Sam Ravnborg
parent
90075dde44
commit
f5b0c65424
@ -103,6 +103,14 @@ config DRM_PANEL_SAMSUNG_LD9040
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depends on OF && SPI
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select VIDEOMODE_HELPERS
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config DRM_PANEL_LG_LB035Q02
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tristate "LG LB035Q024573 RGB panel"
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depends on GPIOLIB && OF && SPI
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help
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Say Y here if you want to enable support for the LB035Q02 RGB panel
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(found on the Gumstix Overo Palo35 board). To compile this driver as
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a module, choose M here.
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config DRM_PANEL_LG_LG4573
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tristate "LG4573 RGB/SPI panel"
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depends on OF && SPI
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@ -8,6 +8,7 @@ obj-$(CONFIG_DRM_PANEL_ILITEK_ILI9881C) += panel-ilitek-ili9881c.o
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obj-$(CONFIG_DRM_PANEL_INNOLUX_P079ZCA) += panel-innolux-p079zca.o
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obj-$(CONFIG_DRM_PANEL_JDI_LT070ME05000) += panel-jdi-lt070me05000.o
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obj-$(CONFIG_DRM_PANEL_KINGDISPLAY_KD097D04) += panel-kingdisplay-kd097d04.o
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obj-$(CONFIG_DRM_PANEL_LG_LB035Q02) += panel-lg-lb035q02.o
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obj-$(CONFIG_DRM_PANEL_LG_LG4573) += panel-lg-lg4573.o
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obj-$(CONFIG_DRM_PANEL_NOVATEK_NT39016) += panel-novatek-nt39016.o
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obj-$(CONFIG_DRM_PANEL_OLIMEX_LCD_OLINUXINO) += panel-olimex-lcd-olinuxino.o
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237
drivers/gpu/drm/panel/panel-lg-lb035q02.c
Normal file
237
drivers/gpu/drm/panel/panel-lg-lb035q02.c
Normal file
@ -0,0 +1,237 @@
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// SPDX-License-Identifier: GPL-2.0
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/*
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* LG.Philips LB035Q02 LCD Panel Driver
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*
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* Copyright (C) 2019 Texas Instruments Incorporated
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*
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* Based on the omapdrm-specific panel-lgphilips-lb035q02 driver
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*
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* Copyright (C) 2013 Texas Instruments Incorporated
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* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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*
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* Based on a driver by: Steve Sakoman <steve@sakoman.com>
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*/
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#include <linux/gpio/consumer.h>
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#include <linux/module.h>
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#include <linux/spi/spi.h>
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#include <drm/drm_connector.h>
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#include <drm/drm_modes.h>
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#include <drm/drm_panel.h>
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struct lb035q02_device {
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struct drm_panel panel;
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struct spi_device *spi;
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struct gpio_desc *enable_gpio;
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};
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#define to_lb035q02_device(p) container_of(p, struct lb035q02_device, panel)
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static int lb035q02_write(struct lb035q02_device *lcd, u16 reg, u16 val)
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{
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struct spi_message msg;
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struct spi_transfer index_xfer = {
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.len = 3,
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.cs_change = 1,
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};
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struct spi_transfer value_xfer = {
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.len = 3,
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};
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u8 buffer[16];
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spi_message_init(&msg);
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/* register index */
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buffer[0] = 0x70;
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buffer[1] = 0x00;
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buffer[2] = reg & 0x7f;
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index_xfer.tx_buf = buffer;
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spi_message_add_tail(&index_xfer, &msg);
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/* register value */
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buffer[4] = 0x72;
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buffer[5] = val >> 8;
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buffer[6] = val;
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value_xfer.tx_buf = buffer + 4;
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spi_message_add_tail(&value_xfer, &msg);
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return spi_sync(lcd->spi, &msg);
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}
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static int lb035q02_init(struct lb035q02_device *lcd)
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{
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/* Init sequence from page 28 of the lb035q02 spec. */
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static const struct {
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u16 index;
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u16 value;
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} init_data[] = {
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{ 0x01, 0x6300 },
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{ 0x02, 0x0200 },
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{ 0x03, 0x0177 },
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{ 0x04, 0x04c7 },
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{ 0x05, 0xffc0 },
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{ 0x06, 0xe806 },
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{ 0x0a, 0x4008 },
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{ 0x0b, 0x0000 },
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{ 0x0d, 0x0030 },
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{ 0x0e, 0x2800 },
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{ 0x0f, 0x0000 },
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{ 0x16, 0x9f80 },
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{ 0x17, 0x0a0f },
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{ 0x1e, 0x00c1 },
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{ 0x30, 0x0300 },
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{ 0x31, 0x0007 },
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{ 0x32, 0x0000 },
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{ 0x33, 0x0000 },
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{ 0x34, 0x0707 },
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{ 0x35, 0x0004 },
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{ 0x36, 0x0302 },
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{ 0x37, 0x0202 },
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{ 0x3a, 0x0a0d },
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{ 0x3b, 0x0806 },
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};
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unsigned int i;
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int ret;
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for (i = 0; i < ARRAY_SIZE(init_data); ++i) {
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ret = lb035q02_write(lcd, init_data[i].index,
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init_data[i].value);
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if (ret < 0)
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return ret;
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}
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return 0;
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}
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static int lb035q02_disable(struct drm_panel *panel)
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{
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struct lb035q02_device *lcd = to_lb035q02_device(panel);
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gpiod_set_value_cansleep(lcd->enable_gpio, 0);
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return 0;
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}
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static int lb035q02_enable(struct drm_panel *panel)
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{
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struct lb035q02_device *lcd = to_lb035q02_device(panel);
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gpiod_set_value_cansleep(lcd->enable_gpio, 1);
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return 0;
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}
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static const struct drm_display_mode lb035q02_mode = {
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.clock = 6500,
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.hdisplay = 320,
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.hsync_start = 320 + 20,
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.hsync_end = 320 + 20 + 2,
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.htotal = 320 + 20 + 2 + 68,
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.vdisplay = 240,
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.vsync_start = 240 + 4,
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.vsync_end = 240 + 4 + 2,
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.vtotal = 240 + 4 + 2 + 18,
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.vrefresh = 60,
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.type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED,
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.flags = DRM_MODE_FLAG_NHSYNC | DRM_MODE_FLAG_NVSYNC,
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.width_mm = 70,
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.height_mm = 53,
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};
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static int lb035q02_get_modes(struct drm_panel *panel)
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{
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struct drm_connector *connector = panel->connector;
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struct drm_display_mode *mode;
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mode = drm_mode_duplicate(panel->drm, &lb035q02_mode);
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if (!mode)
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return -ENOMEM;
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drm_mode_set_name(mode);
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drm_mode_probed_add(connector, mode);
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connector->display_info.width_mm = lb035q02_mode.width_mm;
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connector->display_info.height_mm = lb035q02_mode.height_mm;
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/*
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* FIXME: According to the datasheet pixel data is sampled on the
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* rising edge of the clock, but the code running on the Gumstix Overo
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* Palo35 indicates sampling on the negative edge. This should be
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* tested on a real device.
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*/
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connector->display_info.bus_flags = DRM_BUS_FLAG_DE_HIGH
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| DRM_BUS_FLAG_SYNC_SAMPLE_POSEDGE
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| DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE;
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return 1;
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}
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static const struct drm_panel_funcs lb035q02_funcs = {
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.disable = lb035q02_disable,
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.enable = lb035q02_enable,
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.get_modes = lb035q02_get_modes,
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};
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static int lb035q02_probe(struct spi_device *spi)
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{
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struct lb035q02_device *lcd;
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int ret;
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lcd = devm_kzalloc(&spi->dev, sizeof(*lcd), GFP_KERNEL);
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if (lcd == NULL)
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return -ENOMEM;
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spi_set_drvdata(spi, lcd);
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lcd->spi = spi;
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lcd->enable_gpio = devm_gpiod_get(&spi->dev, "enable", GPIOD_OUT_LOW);
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if (IS_ERR(lcd->enable_gpio)) {
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dev_err(&spi->dev, "failed to parse enable gpio\n");
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return PTR_ERR(lcd->enable_gpio);
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}
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ret = lb035q02_init(lcd);
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if (ret < 0)
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return ret;
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drm_panel_init(&lcd->panel);
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lcd->panel.dev = &lcd->spi->dev;
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lcd->panel.funcs = &lb035q02_funcs;
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return drm_panel_add(&lcd->panel);
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}
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static int lb035q02_remove(struct spi_device *spi)
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{
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struct lb035q02_device *lcd = spi_get_drvdata(spi);
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drm_panel_remove(&lcd->panel);
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drm_panel_disable(&lcd->panel);
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return 0;
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}
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static const struct of_device_id lb035q02_of_match[] = {
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{ .compatible = "lgphilips,lb035q02", },
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{ /* sentinel */ },
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};
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MODULE_DEVICE_TABLE(of, lb035q02_of_match);
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static struct spi_driver lb035q02_driver = {
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.probe = lb035q02_probe,
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.remove = lb035q02_remove,
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.driver = {
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.name = "panel-lg-lb035q02",
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.of_match_table = lb035q02_of_match,
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},
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};
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module_spi_driver(lb035q02_driver);
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MODULE_ALIAS("spi:lgphilips,lb035q02");
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MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
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MODULE_DESCRIPTION("LG.Philips LB035Q02 LCD Panel driver");
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MODULE_LICENSE("GPL");
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