From patchwork Fri Oct 16 12:15:09 2015 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: =?utf-8?b?Q0sgSHUgKOiDoeS/iuWFiSk=?= X-Patchwork-Id: 7414411 Return-Path: X-Original-To: patchwork-linux-mediatek@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork1.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork1.web.kernel.org (Postfix) with ESMTP id 9F0F89F1D5 for ; Fri, 16 Oct 2015 12:16:07 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 28A04205BB for ; Fri, 16 Oct 2015 12:16:06 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.9]) (using TLSv1.2 with cipher AES128-GCM-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id ACF61205B1 for ; Fri, 16 Oct 2015 12:16:04 +0000 (UTC) Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zn3vY-0006xP-6u; Fri, 16 Oct 2015 12:16:04 +0000 Received: from [210.61.82.183] (helo=mailgw01.mediatek.com) by bombadil.infradead.org with esmtps (Exim 4.80.1 #2 (Red Hat Linux)) id 1Zn3vA-0006MH-97; Fri, 16 Oct 2015 12:15:43 +0000 X-Listener-Flag: 11101 Received: from mtkhts07.mediatek.inc [(172.21.101.69)] by mailgw01.mediatek.com (envelope-from ) (mhqrelay.mediatek.com ESMTP with TLS) with ESMTP id 1862767577; Fri, 16 Oct 2015 20:15:16 +0800 Received: from mtkslt303.mediatek.inc (10.21.14.116) by mtkhts07.mediatek.inc (172.21.101.73) with Microsoft SMTP Server id 14.3.181.6; Fri, 16 Oct 2015 20:15:14 +0800 From: CK Hu To: Rob Herring , Pawel Moll , Mark Rutland , Ian Campbell , Kumar Gala , David Airlie , Matthias Brugger Subject: [RFC 2/2] drm/bridge: Add I2C based driver for ps8640 bridge Date: Fri, 16 Oct 2015 20:15:09 +0800 Message-ID: <1444997709-57293-2-git-send-email-ck.hu@mediatek.com> X-Mailer: git-send-email 1.7.9.5 In-Reply-To: <1444997709-57293-1-git-send-email-ck.hu@mediatek.com> References: <1444997709-57293-1-git-send-email-ck.hu@mediatek.com> MIME-Version: 1.0 X-MTK: N X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20151016_051540_751656_BAD5DFE2 X-CRM114-Status: GOOD ( 24.80 ) X-Spam-Score: -1.1 (-) X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.20 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: devicetree@vger.kernel.org, eddie.huang@mediatek.com, Jitao Shi , Sascha Hauer , srv_heupstream@mediatek.com, linux-mediatek@lists.infradead.org, Russell King , dri-devel@lists.freedesktop.org, linux-kernel@vger.kernel.org, Inki Dae , yingjoe.chen@mediatek.com, cawa.cheng@mediatek.com, Sean Paul , Philipp Zabel , Andy Yan , Vincent Palatin , Thierry Reding , Ajay Kumar , linux-arm-kernel@lists.infradead.org, Rahul Sharma Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, T_RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Virus-Scanned: ClamAV using ClamSMTP From: Jitao Shi This patch adds drm_bridge driver for parade DSI to eDP bridge chip. Signed-off-by: Jitao Shi --- drivers/gpu/drm/bridge/Kconfig | 9 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/parade-ps8640.c | 489 ++++++++++++++++++++++++++++++++ 3 files changed, 499 insertions(+) create mode 100644 drivers/gpu/drm/bridge/parade-ps8640.c diff --git a/drivers/gpu/drm/bridge/Kconfig b/drivers/gpu/drm/bridge/Kconfig index 2de52a5..8ecaeed 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -29,4 +29,13 @@ config DRM_PARADE_PS8622 ---help--- Parade eDP-LVDS bridge chip driver. +config DRM_PARADE_PS8640 + bool "Parade PS8640 MIPI DSI to eDP Converter" + select DRM_KMS_HELPER + select DRM_PANEL + ---help--- + Choose this option if you have PS8640 for display + The PS8640 is a high-performance and low-power + MIPI DSI to eDP converter + endmenu diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index e2eef1c..da9e4a4 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -3,3 +3,4 @@ ccflags-y := -Iinclude/drm obj-$(CONFIG_DRM_DW_HDMI) += dw_hdmi.o obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o +obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c new file mode 100644 index 0000000..dc62dd7 --- /dev/null +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -0,0 +1,489 @@ +/* + * Copyright (c) 2014 MediaTek 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 program is distributed in the hope that it will be useful, + * but WITHOUT ANY WARRANTY; without even the implied warranty of + * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the + * GNU General Public License for more details. + */ + +#include +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include +#include +#include + +#define PAGE2_GPIO_L 0xa6 +#define PAGE2_GPIO_H 0xa7 +#define PS_GPIO9 BIT(1) + +#define PAGE4_REV_L 0xf0 +#define PAGE4_REV_H 0xf1 +#define PAGE4_CHIP_L 0xf2 +#define PAGE4_CHIP_H 0xf3 + +#define bridge_to_ps8640(e) container_of(e, struct ps8640, bridge) +#define connector_to_ps8640(e) container_of(e, struct ps8640, connector) + +struct ps8640 { + struct drm_connector connector; + struct drm_bridge bridge; + struct i2c_client *client; + struct ps8640_driver_data *driver_data; + struct regulator *pwr_1v2_supply; + struct regulator *pwr_3v3_supply; + struct drm_panel *panel; + struct gpio_desc *gpio_rst_n; + struct gpio_desc *gpio_pwr_n; + struct gpio_desc *gpio_mode_sel_n; + void *edid; + u16 base_reg; + bool enabled; +}; + +static int ps8640_regr(struct i2c_client *client, u16 i2c_addr, + u8 reg, u8 *value) +{ + int ret; + + client->addr = i2c_addr; + + ret = i2c_master_send(client, ®, 1); + if (ret <= 0) { + DRM_ERROR("Failed to send i2c command, ret=%d\n", ret); + return ret; + } + + ret = i2c_master_recv(client, value, 1); + if (ret <= 0) { + DRM_ERROR("Failed to recv i2c data, ret=%d\n", ret); + return ret; + } + + return 0; +} + +static int ps8640_regw(struct i2c_client *client, u16 i2c_addr, + u8 reg, u8 value) +{ + int ret; + char buf[2]; + + client->addr = i2c_addr; + + buf[0] = reg; + buf[1] = value; + ret = i2c_master_send(client, buf, ARRAY_SIZE(buf)); + if (ret <= 0) { + DRM_ERROR("Failed to send i2c command, ret=%d\n", ret); + return ret; + } + + return 0; +} + +static int ps8640_check_valid_id(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->client; + u8 rev_id_low, rev_id_high, chip_id_low, chip_id_high; + int retry_cnt = 0; + + do { + ps8640_regr(client, ps_bridge->base_reg + 4, PAGE4_CHIP_H, + &chip_id_high); + if (chip_id_high != 0x30) + DRM_INFO("chip_id_high = 0x%x\n", chip_id_high); + } while ((retry_cnt++ < 2) && (chip_id_high != 0x30)); + + ps8640_regr(client, ps_bridge->base_reg + 4, PAGE4_REV_L, &rev_id_low); + ps8640_regr(client, ps_bridge->base_reg + 4, PAGE4_REV_H, &rev_id_high); + ps8640_regr(client, ps_bridge->base_reg + 4, PAGE4_CHIP_L, + &chip_id_low); + + if ((rev_id_low == 0x00) && (rev_id_high == 0x0a) && + (chip_id_low == 0x00) && (chip_id_high == 0x30)) + return 1; + + return 0; +} + +static void ps8640_show_mcu_fw_version(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->client; + u8 major_ver, minor_ver; + + ps8640_regr(client, ps_bridge->base_reg + 5, 0x4, &major_ver); + ps8640_regr(client, ps_bridge->base_reg + 5, 0x5, &minor_ver); + + DRM_INFO_ONCE("ps8640 rom fw version %d.%d\n", major_ver, minor_ver); +} + +static int ps8640_bdg_enable(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->client; + + if (ps8640_check_valid_id(ps_bridge)) { + ps8640_regw(client, ps_bridge->base_reg + 3, 0xfe, 0x13); + ps8640_regw(client, ps_bridge->base_reg + 3, 0xff, 0x18); + ps8640_regw(client, ps_bridge->base_reg + 3, 0xfe, 0x13); + ps8640_regw(client, ps_bridge->base_reg + 3, 0xff, 0x1c); + + return 0; + } + + return -1; +} + +static void ps8640_prepare(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->client; + int err, retry_cnt = 0; + u8 set_vdo_done; + + if (ps_bridge->enabled) + return; + + if (drm_panel_prepare(ps_bridge->panel)) { + DRM_ERROR("failed to prepare panel\n"); + return; + } + + err = regulator_enable(ps_bridge->pwr_1v2_supply); + if (err < 0) { + DRM_ERROR("failed to enable pwr_1v2_supply: %d\n", err); + return; + } + + err = regulator_enable(ps_bridge->pwr_3v3_supply); + if (err < 0) { + DRM_ERROR("failed to enable pwr_3v3_supply: %d\n", err); + return; + } + + gpiod_set_value(ps_bridge->gpio_pwr_n, 1); + gpiod_set_value(ps_bridge->gpio_rst_n, 0); + usleep_range(500, 700); + gpiod_set_value(ps_bridge->gpio_rst_n, 1); + + do { + msleep(50); + ps8640_regr(client, ps_bridge->base_reg + 2, PAGE2_GPIO_H, + &set_vdo_done); + } while ((retry_cnt++ < 70) && ((set_vdo_done & PS_GPIO9) != PS_GPIO9)); + + ps8640_show_mcu_fw_version(ps_bridge); + ps_bridge->enabled = true; +} + +static void ps8640_pre_enable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + + ps8640_prepare(ps_bridge); +} + +static void ps8640_enable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + + ps8640_bdg_enable(ps_bridge); + + if (drm_panel_enable(ps_bridge->panel)) { + DRM_ERROR("failed to enable panel\n"); + return; + } +} + +static void ps8640_disable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + + if (!ps_bridge->enabled) + return; + + ps_bridge->enabled = false; + + if (drm_panel_disable(ps_bridge->panel)) { + DRM_ERROR("failed to disable panel\n"); + return; + } + + regulator_disable(ps_bridge->pwr_1v2_supply); + regulator_disable(ps_bridge->pwr_3v3_supply); + gpiod_set_value(ps_bridge->gpio_rst_n, 0); + gpiod_set_value(ps_bridge->gpio_pwr_n, 0); +} + +static void ps8640_post_disable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + + if (drm_panel_unprepare(ps_bridge->panel)) { + DRM_ERROR("failed to unprepare panel\n"); + return; + } +} + +static int ps8640_get_modes(struct drm_connector *connector) +{ + struct ps8640 *ps_bridge = connector_to_ps8640(connector); + struct i2c_client *client = ps_bridge->client; + + ps8640_prepare(ps_bridge); + ps8640_regw(client, ps_bridge->base_reg + 2, 0xea, 0xd0); + + return drm_panel_get_modes(ps_bridge->panel); +} + +static struct drm_encoder *ps8640_best_encoder(struct drm_connector *connector) +{ + struct ps8640 *ps_bridge; + + ps_bridge = connector_to_ps8640(connector); + return ps_bridge->bridge.encoder; +} + +static const struct drm_connector_helper_funcs + ps8640_connector_helper_funcs = { + .get_modes = ps8640_get_modes, + .best_encoder = ps8640_best_encoder, +}; + +static enum drm_connector_status ps8640_detect(struct drm_connector *connector, + bool force) +{ + return connector_status_connected; +} + +static void ps8640_connector_destroy(struct drm_connector *connector) +{ + drm_connector_unregister(connector); + drm_connector_cleanup(connector); +} + +static const struct drm_connector_funcs ps8640_connector_funcs = { + .dpms = drm_atomic_helper_connector_dpms, + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = ps8640_detect, + .destroy = ps8640_connector_destroy, + .reset = drm_atomic_helper_connector_reset, + .atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state, + .atomic_destroy_state = drm_atomic_helper_connector_destroy_state, +}; + +int ps8640_bridge_attach(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int ret; + + if (!bridge->encoder) { + DRM_ERROR("Parent encoder object not found"); + return -ENODEV; + } + + ret = drm_connector_init(bridge->dev, &ps_bridge->connector, + &ps8640_connector_funcs, + DRM_MODE_CONNECTOR_eDP); + + if (ret) { + DRM_ERROR("Failed to initialize connector with drm\n"); + return ret; + } + + drm_connector_helper_add(&ps_bridge->connector, + &ps8640_connector_helper_funcs); + drm_connector_register(&ps_bridge->connector); + + ps_bridge->connector.dpms = DRM_MODE_DPMS_ON; + drm_mode_connector_attach_encoder(&ps_bridge->connector, + bridge->encoder); + + if (ps_bridge->panel) + drm_panel_attach(ps_bridge->panel, &ps_bridge->connector); + + return ret; +} + +static bool ps8640_bridge_mode_fixup(struct drm_bridge *bridge, + const struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) +{ + return true; +} + +static const struct drm_bridge_funcs ps8640_bridge_funcs = { + .attach = ps8640_bridge_attach, + .mode_fixup = ps8640_bridge_mode_fixup, + .disable = ps8640_disable, + .post_disable = ps8640_post_disable, + .pre_enable = ps8640_pre_enable, + .enable = ps8640_enable, +}; + +static int ps8640_probe(struct i2c_client *client, + const struct i2c_device_id *id) +{ + struct device *dev = &client->dev; + struct ps8640 *ps_bridge; + struct device_node *np = dev->of_node; + struct device_node *in_ep, *out_ep; + struct device_node *panel_node = NULL; + int ret, size; + u32 temp_reg; + const u8 *edidp; + + ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL); + if (!ps_bridge) + return -ENOMEM; + + /* FIXME - use of_graph_get_port_by_id(np, 1) on newer kernels */ + in_ep = of_graph_get_next_endpoint(np, NULL); + if (in_ep) { + out_ep = of_graph_get_next_endpoint(np, in_ep); + of_node_put(in_ep); + if (out_ep) { + panel_node = of_graph_get_remote_port_parent(out_ep); + of_node_put(out_ep); + } + } + if (panel_node) { + ps_bridge->panel = of_drm_find_panel(panel_node); + of_node_put(panel_node); + if (!ps_bridge->panel) + return -EPROBE_DEFER; + } + + ps_bridge->client = client; + + edidp = of_get_property(np, "edid", &size); + + if (edidp) + ps_bridge->edid = devm_kmemdup(&client->dev, edidp, size, + GFP_KERNEL); + + ps_bridge->pwr_3v3_supply = devm_regulator_get(dev, "ps8640-3v3"); + if (IS_ERR(ps_bridge->pwr_3v3_supply)) { + dev_err(dev, "cannot get ps_bridge->pwr_3v3_supply\n"); + return PTR_ERR(ps_bridge->pwr_3v3_supply); + } + + ps_bridge->pwr_1v2_supply = devm_regulator_get(dev, "ps8640-1v2"); + if (IS_ERR(ps_bridge->pwr_1v2_supply)) { + dev_err(dev, "cannot get ps_bridge->pwr_1v2_supply\n"); + return PTR_ERR(ps_bridge->pwr_1v2_supply); + } + + ps_bridge->gpio_mode_sel_n = devm_gpiod_get(&client->dev, "mode-sel", + GPIOD_OUT_HIGH); + if (IS_ERR(ps_bridge->gpio_mode_sel_n)) { + ret = PTR_ERR(ps_bridge->gpio_mode_sel_n); + DRM_ERROR("cannot get gpio_mode_sel_n %d\n", ret); + return ret; + } + + ret = gpiod_direction_output(ps_bridge->gpio_mode_sel_n, 1); + if (ret) { + DRM_ERROR("cannot configure gpio_mode_sel_n\n"); + return ret; + } + + ps_bridge->gpio_pwr_n = devm_gpiod_get(&client->dev, "power", + GPIOD_OUT_HIGH); + if (IS_ERR(ps_bridge->gpio_pwr_n)) { + ret = PTR_ERR(ps_bridge->gpio_pwr_n); + DRM_ERROR("cannot get gpio_pwr_n %d\n", ret); + return ret; + } + + ret = gpiod_direction_output(ps_bridge->gpio_pwr_n, 1); + if (ret) { + DRM_ERROR("cannot configure gpio_pwr_n\n"); + return ret; + } + + ps_bridge->gpio_rst_n = devm_gpiod_get(&client->dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(ps_bridge->gpio_rst_n)) { + ret = PTR_ERR(ps_bridge->gpio_rst_n); + DRM_ERROR("cannot get gpio_rst_n %d\n", ret); + return ret; + } + + ret = gpiod_direction_output(ps_bridge->gpio_rst_n, 1); + if (ret) { + DRM_ERROR("cannot configure gpio_rst_n\n"); + return ret; + } + + ret = of_property_read_u32(dev->of_node, "reg", &temp_reg); + if (ret) { + DRM_ERROR("Can't read base_reg value\n"); + return ret; + } + ps_bridge->base_reg = temp_reg; + + ps_bridge->bridge.funcs = &ps8640_bridge_funcs; + ps_bridge->bridge.of_node = dev->of_node; + ret = drm_bridge_add(&ps_bridge->bridge); + if (ret) { + DRM_ERROR("Failed to add bridge\n"); + return ret; + } + + i2c_set_clientdata(client, ps_bridge); + + return 0; +} + +static int ps8640_remove(struct i2c_client *client) +{ + struct ps8640 *ps_bridge = i2c_get_clientdata(client); + + drm_bridge_remove(&ps_bridge->bridge); + + return 0; +} + +static const struct i2c_device_id ps8640_i2c_table[] = { + {"parade,ps8640", 0}, + {}, +}; +MODULE_DEVICE_TABLE(i2c, ps8640_i2c_table); + +static const struct of_device_id ps8640_match[] = { + { .compatible = "parade,ps8640" }, + {}, +}; +MODULE_DEVICE_TABLE(of, ps8640_match); + +static struct i2c_driver ps8640_driver = { + .id_table = ps8640_i2c_table, + .probe = ps8640_probe, + .remove = ps8640_remove, + .driver = { + .name = "parade,ps8640", + .owner = THIS_MODULE, + .of_match_table = ps8640_match, + }, +}; +module_i2c_driver(ps8640_driver); + +MODULE_AUTHOR("Jitao Shi "); +MODULE_AUTHOR("CK Hu "); +MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver"); +MODULE_LICENSE("GPL v2");