Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1752032AbaLaIUd (ORCPT ); Wed, 31 Dec 2014 03:20:33 -0500 Received: from mail-bn1on0134.outbound.protection.outlook.com ([157.56.110.134]:37568 "EHLO na01-bn1-obe.outbound.protection.outlook.com" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1751986AbaLaIU1 (ORCPT ); Wed, 31 Dec 2014 03:20:27 -0500 From: Liu Ying To: CC: , , , , , , , , , , , , Subject: [PATCH RFC v8 16/21] drm: panel: Add support for Himax HX8369A MIPI DSI panel Date: Wed, 31 Dec 2014 16:23:34 +0800 Message-ID: <1420014219-915-17-git-send-email-Ying.Liu@freescale.com> X-Mailer: git-send-email 2.1.0 In-Reply-To: <1420014219-915-1-git-send-email-Ying.Liu@freescale.com> References: <1420014219-915-1-git-send-email-Ying.Liu@freescale.com> X-EOPAttributedMessage: 0 Authentication-Results: spf=fail (sender IP is 192.88.158.2) smtp.mailfrom=Ying.Liu@freescale.com; X-Forefront-Antispam-Report: CIP:192.88.158.2;CTRY:US;IPV:NLI;EFV:NLI;SFV:NSPM;SFS:(10019020)(6009001)(339900001)(189002)(199003)(104016003)(84676001)(50466002)(76176999)(92566001)(21056001)(64706001)(31966008)(87936001)(47776003)(6806004)(50226001)(46102003)(48376002)(85426001)(20776003)(107046002)(99396003)(2351001)(106466001)(81156004)(62966003)(97736003)(120916001)(68736005)(69596002)(110136001)(77156002)(36756003)(50986999)(4396001)(19580395003)(19580405001)(77096005)(2950100001)(89996001)(86362001)(575784001)(229853001)(2004002)(217873001);DIR:OUT;SFP:1102;SCL:1;SRVR:BN1PR0301MB0625;H:az84smr01.freescale.net;FPR:;SPF:Fail;MLV:sfv;PTR:InfoDomainNonexistent;MX:1;A:1;LANG:en; MIME-Version: 1.0 Content-Type: text/plain X-Microsoft-Antispam: UriScan:; X-Microsoft-Antispam: BCL:0;PCL:0;RULEID:;SRVR:BN1PR0301MB0625; X-Forefront-PRVS: 0442E569BC X-OriginatorOrg: freescale.com X-MS-Exchange-CrossTenant-OriginalArrivalTime: 31 Dec 2014 08:20:24.6575 (UTC) X-MS-Exchange-CrossTenant-Id: 710a03f5-10f6-4d38-9ff4-a80b81da590d X-MS-Exchange-CrossTenant-OriginalAttributedTenantConnectingIp: TenantId=710a03f5-10f6-4d38-9ff4-a80b81da590d;Ip=[192.88.158.2] X-MS-Exchange-CrossTenant-FromEntityHeader: HybridOnPrem X-MS-Exchange-Transport-CrossTenantHeadersStamped: BN1PR0301MB0625 Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org This patch adds support for Himax HX8369A MIPI DSI panel. Reviewed-by: Andrzej Hajda Signed-off-by: Liu Ying --- v7->v8: * Remove several unnecessary headers included in the driver. v6->v7: * Address Andrzej Hajda's following comments. * Simplify the return logic in hx8369a_dcs_write(). * Replace the macro hx8369a_dsi_init_helper() with a function array to improve the code quality. * Handle error cases during getting gpios in probe(). * Add 'Reviewed-by: Andrzej Hajda '. v5->v6: * Make the checkpatch.pl script be happier. * Do not set the dsi channel number to be zero in probe(), because the MIPI DSI bus driver would set it. v4->v5: * Address Andrzej Hajda's comments. * Get the bs-gpios property instead of the bs[3:0]-gpios properties. * Implement error propagation for panel register configurations. * Other minor changes to improve the code quality. v3->v4: * Move the relevant dt-bindings to a separate patch to address Stefan Wahren's comment. v2->v3: * Sort the included header files alphabetically. v1->v2: * Address almost all comments from Thierry Reding. * Remove several DT properties as they can be implied by the compatible string. * Add the HIMAX/himax prefixes to the driver's Kconfig name and driver name. * Move the driver's Makefile entry place to sort the entries alphabetically. * Reuse several standard DCS functions instead of inventing wheels. * Move the panel resetting and power logics to the driver probe/remove stages. This may simplify panel prepare/unprepare hooks. The power consumption should not change a lot at DPMS since the panel enters sleep mode at that time. * Add the module author. * Other minor changes, such as coding style issues. drivers/gpu/drm/panel/Kconfig | 5 + drivers/gpu/drm/panel/Makefile | 1 + drivers/gpu/drm/panel/panel-himax-hx8369a.c | 610 ++++++++++++++++++++++++++++ 3 files changed, 616 insertions(+) create mode 100644 drivers/gpu/drm/panel/panel-himax-hx8369a.c diff --git a/drivers/gpu/drm/panel/Kconfig b/drivers/gpu/drm/panel/Kconfig index 024e98e..81b0bf0 100644 --- a/drivers/gpu/drm/panel/Kconfig +++ b/drivers/gpu/drm/panel/Kconfig @@ -16,6 +16,11 @@ config DRM_PANEL_SIMPLE that it can be automatically turned off when the panel goes into a low power state. +config DRM_PANEL_HIMAX_HX8369A + tristate "Himax HX8369A panel" + depends on OF + select DRM_MIPI_DSI + config DRM_PANEL_LD9040 tristate "LD9040 RGB/SPI panel" depends on OF && SPI diff --git a/drivers/gpu/drm/panel/Makefile b/drivers/gpu/drm/panel/Makefile index 4b2a043..d5dbe06 100644 --- a/drivers/gpu/drm/panel/Makefile +++ b/drivers/gpu/drm/panel/Makefile @@ -1,4 +1,5 @@ obj-$(CONFIG_DRM_PANEL_SIMPLE) += panel-simple.o +obj-$(CONFIG_DRM_PANEL_HIMAX_HX8369A) += panel-himax-hx8369a.o obj-$(CONFIG_DRM_PANEL_LD9040) += panel-ld9040.o obj-$(CONFIG_DRM_PANEL_S6E8AA0) += panel-s6e8aa0.o obj-$(CONFIG_DRM_PANEL_SHARP_LQ101R1SX01) += panel-sharp-lq101r1sx01.o diff --git a/drivers/gpu/drm/panel/panel-himax-hx8369a.c b/drivers/gpu/drm/panel/panel-himax-hx8369a.c new file mode 100644 index 0000000..34b9a40 --- /dev/null +++ b/drivers/gpu/drm/panel/panel-himax-hx8369a.c @@ -0,0 +1,610 @@ +/* + * Himax HX8369A panel driver. + * + * Copyright (C) 2011-2014 Freescale Semiconductor, Inc. + * + * This program is free software; you can redistribute it and/or modify + * it under the terms of the GNU General Public License version 2 as + * published by the Free Software Foundation. + * + * This driver is based on Samsung s6e8aa0 panel driver. + */ + +#include +#include +#include + +#include +#include +#include + +#define WRDISBV 0x51 +#define WRCTRLD 0x53 +#define WRCABC 0x55 +#define SETPOWER 0xb1 +#define SETDISP 0xb2 +#define SETCYC 0xb4 +#define SETVCOM 0xb6 +#define SETEXTC 0xb9 +#define SETMIPI 0xba +#define SETPANEL 0xcc +#define SETGIP 0xd5 +#define SETGAMMA 0xe0 + +#define HX8369A_MIN_BRIGHTNESS 0x00 +#define HX8369A_MAX_BRIGHTNESS 0xff + +enum hx8369a_mpu_interface { + HX8369A_DBI_TYPE_A_8BIT, + HX8369A_DBI_TYPE_A_9BIT, + HX8369A_DBI_TYPE_A_16BIT, + HX8369A_DBI_TYPE_A_18BIT, + HX8369A_DBI_TYPE_B_8BIT, + HX8369A_DBI_TYPE_B_9BIT, + HX8369A_DBI_TYPE_B_16BIT, + HX8369A_DBI_TYPE_B_18BIT, + HX8369A_DSI_CMD_MODE, + HX8369A_DBI_TYPE_B_24BIT, + HX8369A_DSI_VIDEO_MODE, + HX8369A_MDDI, + HX8369A_DPI_DBI_TYPE_C_OPT1, + HX8369A_DPI_DBI_TYPE_C_OPT2, + HX8369A_DPI_DBI_TYPE_C_OPT3 +}; + +enum hx8369a_resolution { + HX8369A_RES_480_864, + HX8369A_RES_480_854, + HX8369A_RES_480_800, + HX8369A_RES_480_640, + HX8369A_RES_360_640, + HX8369A_RES_480_720, +}; + +struct hx8369a_panel_desc { + const struct drm_display_mode *mode; + + /* ms */ + unsigned int power_on_delay; + unsigned int reset_delay; + + unsigned int dsi_lanes; +}; + +struct hx8369a { + struct device *dev; + struct drm_panel panel; + + const struct hx8369a_panel_desc *pd; + + struct regulator_bulk_data supplies[5]; + struct gpio_desc *reset_gpio; + struct gpio_desc *bs_gpio[4]; + u8 res_sel; +}; + +static inline struct hx8369a *panel_to_hx8369a(struct drm_panel *panel) +{ + return container_of(panel, struct hx8369a, panel); +} + +static int hx8369a_dcs_write(struct hx8369a *ctx, const char *func, + const void *data, size_t len) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + ssize_t ret; + + ret = mipi_dsi_dcs_write_buffer(dsi, data, len); + if (ret < 0) + dev_err(ctx->dev, "%s failed: %d\n", func, ret); + return ret; +} + +#define hx8369a_dcs_write_seq(ctx, seq...) \ +({ \ + const u8 d[] = { seq }; \ + BUILD_BUG_ON_MSG(ARRAY_SIZE(d) > 64, \ + "DCS sequence too big for stack"); \ + hx8369a_dcs_write(ctx, __func__, d, ARRAY_SIZE(d)); \ +}) + +#define hx8369a_dcs_write_seq_static(ctx, seq...) \ +({ \ + static const u8 d[] = { seq }; \ + hx8369a_dcs_write(ctx, __func__, d, ARRAY_SIZE(d)); \ +}) + +static int hx8369a_dsi_set_display_related_register(struct hx8369a *ctx) +{ + u8 sec_p = (ctx->res_sel << 4) | 0x03; + + return hx8369a_dcs_write_seq(ctx, SETDISP, 0x00, sec_p, 0x03, + 0x03, 0x70, 0x00, 0xff, 0x00, 0x00, 0x00, + 0x00, 0x03, 0x03, 0x00, 0x01); +} + +static int hx8369a_dsi_set_display_waveform_cycle(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, SETCYC, 0x00, 0x1d, + 0x5f, 0x0e, 0x06); +} + +static int hx8369a_dsi_set_gip(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, SETGIP, 0x00, 0x04, + 0x03, 0x00, 0x01, 0x05, 0x1c, 0x70, + 0x01, 0x03, 0x00, 0x00, 0x40, 0x06, + 0x51, 0x07, 0x00, 0x00, 0x41, 0x06, + 0x50, 0x07, 0x07, 0x0f, 0x04); +} + +static int hx8369a_dsi_set_power(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, SETPOWER, 0x01, 0x00, + 0x34, 0x06, 0x00, 0x0f, 0x0f, 0x2a, + 0x32, 0x3f, 0x3f, 0x07, 0x3a, 0x01, + 0xe6, 0xe6, 0xe6, 0xe6, 0xe6); +} + +static int hx8369a_dsi_set_vcom_voltage(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, SETVCOM, 0x56, 0x56); +} + +static int hx8369a_dsi_set_panel(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, SETPANEL, 0x02); +} + +static int hx8369a_dsi_set_gamma_curve(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, SETGAMMA, 0x00, 0x1d, + 0x22, 0x38, 0x3d, 0x3f, 0x2e, 0x4a, + 0x06, 0x0d, 0x0f, 0x13, 0x15, 0x13, + 0x16, 0x10, 0x19, 0x00, 0x1d, 0x22, + 0x38, 0x3d, 0x3f, 0x2e, 0x4a, 0x06, + 0x0d, 0x0f, 0x13, 0x15, 0x13, 0x16, + 0x10, 0x19); +} + +static int hx8369a_dsi_set_mipi(struct hx8369a *ctx) +{ + u8 eleventh_p = ctx->pd->dsi_lanes == 2 ? 0x11 : 0x10; + + return hx8369a_dcs_write_seq(ctx, SETMIPI, 0x00, 0xa0, 0xc6, + 0x00, 0x0a, 0x00, 0x10, 0x30, 0x6f, + 0x02, eleventh_p, 0x18, 0x40); +} + +static int hx8369a_dsi_set_interface_pixel_fomat(struct hx8369a *ctx) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + u8 format; + int ret; + + switch (dsi->format) { + case MIPI_DSI_FMT_RGB888: + case MIPI_DSI_FMT_RGB666: + format = 0x77; + break; + case MIPI_DSI_FMT_RGB565: + format = 0x55; + break; + case MIPI_DSI_FMT_RGB666_PACKED: + format = 0x66; + break; + default: + dev_err(ctx->dev, "unsupported DSI pixel format\n"); + return -EINVAL; + } + + ret = mipi_dsi_dcs_set_pixel_format(dsi, format); + if (ret < 0) + dev_err(ctx->dev, "%s failed: %d\n", __func__, ret); + return ret; +} + +static int hx8369a_dsi_set_column_address(struct hx8369a *ctx) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + const struct drm_display_mode *mode = ctx->pd->mode; + int ret; + + ret = mipi_dsi_dcs_set_column_address(dsi, 0, mode->hdisplay - 1); + if (ret < 0) + dev_err(ctx->dev, "%s failed: %d\n", __func__, ret); + return ret; +} + +static int hx8369a_dsi_set_page_address(struct hx8369a *ctx) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + const struct drm_display_mode *mode = ctx->pd->mode; + int ret; + + ret = mipi_dsi_dcs_set_page_address(dsi, 0, mode->vdisplay - 1); + if (ret < 0) + dev_err(ctx->dev, "%s failed: %d\n", __func__, ret); + return ret; +} + +static int hx8369a_dsi_write_display_brightness(struct hx8369a *ctx, + u8 brightness) +{ + return hx8369a_dcs_write_seq(ctx, WRDISBV, brightness); +} + +static int hx8369a_dsi_write_cabc(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, WRCABC, 0x01); +} + +static int hx8369a_dsi_write_control_display(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, WRCTRLD, 0x24); +} + +static int hx8369a_dsi_panel_init(struct hx8369a *ctx) +{ + int (*funcs[])(struct hx8369a *ctx) = { + hx8369a_dsi_set_display_related_register, + hx8369a_dsi_set_display_waveform_cycle, + hx8369a_dsi_set_gip, + hx8369a_dsi_set_power, + hx8369a_dsi_set_vcom_voltage, + hx8369a_dsi_set_panel, + hx8369a_dsi_set_gamma_curve, + hx8369a_dsi_set_mipi, + hx8369a_dsi_set_interface_pixel_fomat, + hx8369a_dsi_set_column_address, + hx8369a_dsi_set_page_address, + hx8369a_dsi_write_cabc, + hx8369a_dsi_write_control_display, + }; + int ret, i; + + for (i = 0; i < ARRAY_SIZE(funcs); i++) { + ret = funcs[i](ctx); + if (ret) + return ret; + } + return 0; +} + +static int hx8369a_dsi_set_extension_command(struct hx8369a *ctx) +{ + return hx8369a_dcs_write_seq_static(ctx, SETEXTC, 0xff, 0x83, 0x69); +} + +static int hx8369a_dsi_set_maximum_return_packet_size(struct hx8369a *ctx, + u16 size) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + int ret; + + ret = mipi_dsi_set_maximum_return_packet_size(dsi, size); + if (ret < 0) + dev_err(ctx->dev, + "error %d setting maximum return packet size to %d\n", + ret, size); + return ret; +} + +static int hx8369a_dsi_set_sequence(struct hx8369a *ctx) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + int ret; + + ret = hx8369a_dsi_set_extension_command(ctx); + if (ret < 0) + goto out; + + ret = hx8369a_dsi_set_maximum_return_packet_size(ctx, 4); + if (ret < 0) + goto out; + + ret = hx8369a_dsi_panel_init(ctx); + if (ret < 0) + goto out; + + ret = mipi_dsi_dcs_exit_sleep_mode(dsi); + if (ret < 0) { + dev_err(ctx->dev, "failed to exit sleep mode: %d\n", ret); + goto out; + } + + ret = mipi_dsi_dcs_set_display_on(dsi); + if (ret < 0) { + dev_err(ctx->dev, "failed to set display on: %d\n", ret); + goto out; + } + + /* + * It's necessary to wait 120msec after sending the Sleep Out + * command before Sleep In command can be sent, according to + * the HX8369A data sheet. + */ + msleep(120); +out: + return ret; +} + +static int hx8369a_dsi_disable(struct drm_panel *panel) +{ + struct hx8369a *ctx = panel_to_hx8369a(panel); + + return hx8369a_dsi_write_display_brightness(ctx, + HX8369A_MIN_BRIGHTNESS); +} + +static int hx8369a_dsi_unprepare(struct drm_panel *panel) +{ + struct hx8369a *ctx = panel_to_hx8369a(panel); + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + int ret; + + ret = mipi_dsi_dcs_enter_sleep_mode(dsi); + if (ret < 0) { + dev_err(ctx->dev, "failed to enter sleep mode: %d\n", ret); + goto out; + } + + ret = mipi_dsi_dcs_set_display_off(dsi); + if (ret < 0) { + dev_err(ctx->dev, "failed to set display off: %d\n", ret); + goto out; + } + + /* + * This is to allow time for the supply voltages and clock + * circuits to stablize, according to the HX8369A data sheet. + */ + msleep(5); +out: + return ret; +} + +static int hx8369a_dsi_prepare(struct drm_panel *panel) +{ + struct hx8369a *ctx = panel_to_hx8369a(panel); + + return hx8369a_dsi_set_sequence(ctx); +} + +static int hx8369a_dsi_enable(struct drm_panel *panel) +{ + struct hx8369a *ctx = panel_to_hx8369a(panel); + + return hx8369a_dsi_write_display_brightness(ctx, + HX8369A_MAX_BRIGHTNESS); +} + +static int hx8369a_get_modes(struct drm_panel *panel) +{ + struct drm_connector *connector = panel->connector; + struct drm_device *drm = panel->drm; + struct hx8369a *ctx = panel_to_hx8369a(panel); + struct drm_display_mode *mode; + const struct drm_display_mode *m = ctx->pd->mode; + + mode = drm_mode_duplicate(drm, m); + if (!mode) { + dev_err(drm->dev, "failed to add mode %ux%u@%u\n", + m->hdisplay, m->vdisplay, m->vrefresh); + return 0; + } + + drm_mode_set_name(mode); + mode->type = DRM_MODE_TYPE_DRIVER | DRM_MODE_TYPE_PREFERRED; + + connector->display_info.bpc = 8; + connector->display_info.width_mm = mode->width_mm; + connector->display_info.height_mm = mode->height_mm; + + drm_mode_probed_add(connector, mode); + + return 1; +} + +static const struct drm_panel_funcs hx8369a_dsi_drm_funcs = { + .disable = hx8369a_dsi_disable, + .unprepare = hx8369a_dsi_unprepare, + .prepare = hx8369a_dsi_prepare, + .enable = hx8369a_dsi_enable, + .get_modes = hx8369a_get_modes, +}; + +static int hx8369a_power_on(struct hx8369a *ctx) +{ + int ret; + + ret = regulator_bulk_enable(ARRAY_SIZE(ctx->supplies), ctx->supplies); + if (ret < 0) + return ret; + + msleep(ctx->pd->power_on_delay); + + gpiod_set_value(ctx->reset_gpio, 1); + usleep_range(50, 60); + gpiod_set_value(ctx->reset_gpio, 0); + + msleep(ctx->pd->reset_delay); + + return 0; +} + +static int hx8369a_power_off(struct hx8369a *ctx) +{ + return regulator_bulk_disable(ARRAY_SIZE(ctx->supplies), ctx->supplies); +} + +static void hx8369a_vm_to_res_sel(struct hx8369a *ctx) +{ + const struct drm_display_mode *mode = ctx->pd->mode; + + switch (mode->hdisplay) { + case 480: + switch (mode->vdisplay) { + case 864: + ctx->res_sel = HX8369A_RES_480_864; + break; + case 854: + ctx->res_sel = HX8369A_RES_480_854; + break; + case 800: + ctx->res_sel = HX8369A_RES_480_800; + break; + case 640: + ctx->res_sel = HX8369A_RES_480_640; + break; + case 720: + ctx->res_sel = HX8369A_RES_480_720; + break; + default: + break; + } + break; + case 360: + if (mode->vdisplay == 640) + ctx->res_sel = HX8369A_RES_360_640; + break; + default: + break; + } +} + +static const struct drm_display_mode truly_tft480800_16_e_mode = { + .clock = 26400, + .hdisplay = 480, + .hsync_start = 480 + 8, + .hsync_end = 480 + 8 + 8, + .htotal = 480 + 8 + 8 + 8, + .vdisplay = 800, + .vsync_start = 800 + 6, + .vsync_end = 800 + 6 + 6, + .vtotal = 800 + 6 + 6 + 6, + .vrefresh = 60, + .width_mm = 45, + .height_mm = 76, +}; + +static const struct hx8369a_panel_desc truly_tft480800_16_e_dsi = { + .mode = &truly_tft480800_16_e_mode, + .power_on_delay = 10, + .reset_delay = 10, + .dsi_lanes = 2, +}; + +static const struct of_device_id hx8369a_dsi_of_match[] = { + { + .compatible = "truly,tft480800-16-e-dsi", + .data = &truly_tft480800_16_e_dsi, + }, { + /* sentinel */ + }, +}; +MODULE_DEVICE_TABLE(of, hx8369a_dsi_of_match); + +static int hx8369a_dsi_probe(struct mipi_dsi_device *dsi) +{ + struct device *dev = &dsi->dev; + const struct of_device_id *of_id = + of_match_device(hx8369a_dsi_of_match, dev); + struct hx8369a *ctx; + int ret, i; + + ctx = devm_kzalloc(dev, sizeof(*ctx), GFP_KERNEL); + if (!ctx) + return -ENOMEM; + + ctx->dev = dev; + + if (of_id) { + ctx->pd = of_id->data; + } else { + dev_err(dev, "cannot find compatible device\n"); + return -ENODEV; + } + + hx8369a_vm_to_res_sel(ctx); + + ctx->supplies[0].supply = "vdd1"; + ctx->supplies[1].supply = "vdd2"; + ctx->supplies[2].supply = "vdd3"; + ctx->supplies[3].supply = "dsi-vcc"; + ctx->supplies[4].supply = "vpp"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ctx->supplies), + ctx->supplies); + if (ret < 0) { + dev_info(dev, "failed to get regulators: %d\n", ret); + return ret; + } + + ctx->reset_gpio = devm_gpiod_get(dev, "reset", GPIOD_OUT_LOW); + if (IS_ERR(ctx->reset_gpio)) { + dev_info(dev, "cannot get reset-gpios %ld\n", + PTR_ERR(ctx->reset_gpio)); + return PTR_ERR(ctx->reset_gpio); + } + + for (i = 0; i < 4; i++) { + ctx->bs_gpio[i] = devm_gpiod_get_index_optional(dev, "bs", i, + GPIOD_OUT_HIGH); + if (!IS_ERR_OR_NULL(ctx->bs_gpio[i])) { + dev_dbg(dev, "bs%d-gpio is configured\n", i); + } else if (IS_ERR(ctx->bs_gpio[i])) { + dev_info(dev, "failed to get bs%d-gpio\n", i); + return PTR_ERR(ctx->bs_gpio[i]); + } + } + + ret = hx8369a_power_on(ctx); + if (ret < 0) { + dev_err(dev, "cannot power on\n"); + return ret; + } + + drm_panel_init(&ctx->panel); + ctx->panel.dev = dev; + ctx->panel.funcs = &hx8369a_dsi_drm_funcs; + + ret = drm_panel_add(&ctx->panel); + if (ret < 0) + return ret; + + mipi_dsi_set_drvdata(dsi, ctx); + + dsi->lanes = ctx->pd->dsi_lanes; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | + MIPI_DSI_MODE_VIDEO_BURST | + MIPI_DSI_MODE_VIDEO_SYNC_PULSE; + ret = mipi_dsi_attach(dsi); + if (ret < 0) + drm_panel_remove(&ctx->panel); + + return ret; +} + +static int hx8369a_dsi_remove(struct mipi_dsi_device *dsi) +{ + struct hx8369a *ctx = mipi_dsi_get_drvdata(dsi); + + mipi_dsi_detach(dsi); + drm_panel_remove(&ctx->panel); + return hx8369a_power_off(ctx); +} + +static struct mipi_dsi_driver hx8369a_dsi_driver = { + .probe = hx8369a_dsi_probe, + .remove = hx8369a_dsi_remove, + .driver = { + .name = "panel-hx8369a-dsi", + .of_match_table = hx8369a_dsi_of_match, + }, +}; +module_mipi_dsi_driver(hx8369a_dsi_driver); + +MODULE_DESCRIPTION("Himax HX8369A panel driver"); +MODULE_AUTHOR("Liu Ying "); +MODULE_LICENSE("GPL v2"); -- 2.1.0 -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/