From patchwork Mon Oct 7 08:22:29 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ulrich Hecht X-Patchwork-Id: 11176931 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 3F628112B for ; Mon, 7 Oct 2019 08:23:27 +0000 (UTC) Received: from bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (using TLSv1.2 with cipher ECDHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPS id 1AC9A2084D for ; Mon, 7 Oct 2019 08:23:27 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="j4ePEiVj"; dkim=fail reason="signature verification failed" (2048-bit key) header.d=fpond.eu header.i=@fpond.eu header.b="CfJhStlL" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 1AC9A2084D Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=fpond.eu Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20170209; h=Sender: Content-Transfer-Encoding:Content-Type:MIME-Version:Cc:List-Subscribe: List-Help:List-Post:List-Archive:List-Unsubscribe:List-Id:References: In-Reply-To:Message-Id:Date:Subject:To:From:Reply-To:Content-ID: Content-Description:Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc :Resent-Message-ID:List-Owner; bh=LHmoL4sqhXeIG9xKKAJZxPaIrozuMIMR83mdvfUiN3M=; b=j4ePEiVjVjrxOiN64EkW28v8xi DCOyD5ypFwcAkQGH41qwfLOjuBszxSrCt2FvvbQxpXj7/wus4GPDfBMdw92YASVcWUU7kQ7nNo4Es EXvt3j8mmhLJdS35PozPOgqbL1TyBj73ffCprLk/ocBQEdc4MoQ+LoKopdvEYkLptaAGXwvHYPvgI B2D1iU168gW9We67219V+Cok7IAtvxebTzdCbMi5x9IMlh0KsIHYWI0a9ByLQfFX6RvqnKw4faS9t TQj7CemgvAaNX+3gP4iFZlRg6jvGqwRs5gKuE/Vf1kZhBqlFlwFV3spefw4PHx1N/9e6az+ne2QCb AehRI5hg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.2 #3 (Red Hat Linux)) id 1iHOIg-0006kE-4v; Mon, 07 Oct 2019 08:23:26 +0000 Received: from mo6-p03-ob.smtp.rzone.de ([2a01:238:20a:202:5303::5]) by bombadil.infradead.org with esmtps (Exim 4.92.2 #3 (Red Hat Linux)) id 1iHOIb-0006hH-Q3 for linux-mediatek@lists.infradead.org; Mon, 07 Oct 2019 08:23:24 +0000 DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; t=1570436599; s=strato-dkim-0002; d=fpond.eu; h=References:In-Reply-To:Message-Id:Date:Subject:Cc:To:From: X-RZG-CLASS-ID:X-RZG-AUTH:From:Subject:Sender; bh=3YaUwsfcMbZwW2h0xhdTfjDMdtnIlTNylb0TrTpMkO4=; b=CfJhStlLE0NtwxIb5nyyyKeRrJR+etLVjY0JcpbjG0HOLSEEOWL8APC4mCqp0gzSrC p/mvUhNVoiNgPZXTMuk3RzYS/cltQjq5hVOQHGKAKi3QIElMWcW7XPWTqJjt+6GJDblH h54/PniGpmSxNp4CiLi9F0yYjH2vjy+3y0MGf4pu6sA/rm3mR5H0w2nUnkx9Em5BdDmo K17jEc201SLCKEle2PfypAsyUPEju+6B61xMFCeJ4b1m+xe8IYFmJubDI7DGNJ/h2UKF OD9x8myAf/ewacfes3O1RTteguztJ1+H2lvwpstJM6Ylbjz8Ck3B4PDpc74KRDEfs4Um EyhQ== X-RZG-AUTH: ":OWANVUa4dPFUgKR/3dpvnYP0Np73dmm4I5W0/AvA67Ot4fvR82Ncd3IXOg==" X-RZG-CLASS-ID: mo00 Received: from groucho.site by smtp.strato.de (RZmta 44.28.0 DYNA|AUTH) with ESMTPSA id i07086v978Maftj (using TLSv1.2 with cipher ECDHE-RSA-AES256-SHA (curve secp521r1 with 521 ECDH bits, eq. 15360 bits RSA)) (Client did not present a certificate); Mon, 7 Oct 2019 10:22:36 +0200 (CEST) From: Ulrich Hecht To: linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, jitao.shi@mediatek.com Subject: [PATCH v20 2/2] drm/bridge: Add I2C based driver for ps8640 bridge Date: Mon, 7 Oct 2019 10:22:29 +0200 Message-Id: <1570436549-8694-3-git-send-email-uli@fpond.eu> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1570436549-8694-1-git-send-email-uli@fpond.eu> References: <1570436549-8694-1-git-send-email-uli@fpond.eu> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191007_012322_165136_9BB3A377 X-CRM114-Status: GOOD ( 20.90 ) X-Spam-Score: -0.9 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.9 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.7 RCVD_IN_DNSWL_LOW RBL: Sender listed at https://www.dnswl.org/, low trust [2a01:238:20a:202:5303:0:0:5 listed in] [list.dnswl.org] -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 SPF_NONE SPF: sender does not publish an SPF Record -0.1 DKIM_VALID_AU Message has a valid DKIM or DK signature from author's domain 0.1 DKIM_SIGNED Message has a DKIM or DK signature, not necessarily valid -0.1 DKIM_VALID Message has at least one valid DKIM or DK signature -0.1 DKIM_VALID_EF Message has a valid DKIM or DK signature from envelope-from domain X-BeenThere: linux-mediatek@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: mark.rutland@arm.com, Ulrich Hecht , stonea168@163.com, ajaykumar.rs@samsung.com, architt@codeaurora.org, vpalatin@chromium.org, cawa.cheng@mediatek.com, bibby.hsieh@mediatek.com, ck.hu@mediatek.com, yingjoe.chen@mediatek.com, devicetree@vger.kernel.org, p.zabel@pengutronix.de, pawel.moll@arm.com, ijc+devicetree@hellion.org.uk, inki.dae@samsung.com, robh+dt@kernel.org, seanpaul@chromium.org, matthias.bgg@gmail.com, eddie.huang@mediatek.com, rahul.sharma@samsung.com, kernel@pengutronix.de, galak@codeaurora.org, enric.balletbo@collabora.com, andy.yan@rock-chips.com MIME-Version: 1.0 Sender: "Linux-mediatek" Errors-To: linux-mediatek-bounces+patchwork-linux-mediatek=patchwork.kernel.org@lists.infradead.org From: Jitao Shi This patch adds drm_bridge driver for parade DSI to eDP bridge chip. Signed-off-by: Jitao Shi Reviewed-by: Daniel Kurtz Reviewed-by: Enric Balletbo i Serra [uli: followed API changes, removed FW update feature] Signed-off-by: Ulrich Hecht Tested-by: Matthias Brugger Tested-by: Enric Balletbo i Serra --- Changes since v19: - fixed return value of ps8640_probe() when no panel is found Changes since v18: - followed DRM API changes - use DEVICE_ATTR_RO() - remove firmware update code - add SPDX identifier Changes since v17: - remove some unused head files. - add macros for ps8640 pages. - remove ddc_i2c client - add mipi_dsi_device_register_full - remove the manufacturer from the name and i2c_device_id Changes since v16: - Disable ps8640 DSI MCS Function. - Rename gpios name more clearly. - Tune the ps8640 power on sequence. Changes since v15: - Drop drm_connector_(un)register calls from parade ps8640. The main DRM driver mtk_drm_drv now calls drm_connector_register_all() after drm_dev_register() in the mtk_drm_bind() function. That function should iterate over all connectors and call drm_connector_register() for each of them. So, remove drm_connector_(un)register calls from parade ps8640. Changes since v14: - update copyright info. - change bridge_to_ps8640 and connector_to_ps8640 to inline function. - fix some coding style. - use sizeof as array counter. - use drm_get_edid when read edid. - add mutex when firmware updating. Changes since v13: - add const on data, ps8640_write_bytes(struct i2c_client *client, const u8 *data, u16 data_len) - fix PAGE2_SW_REST tyro. - move the buf[3] init to entrance of the function. Changes since v12: - fix hw_chip_id build warning Changes since v11: - Remove depends on I2C, add DRM depends - Reuse ps8640_write_bytes() in ps8640_write_byte() - Use timer check for polling like the routines in - Fix no drm_connector_unregister/drm_connector_cleanup when ps8640_bridge_attach fail - Check the ps8640 hardware id in ps8640_validate_firmware - Remove fw_version check - Move ps8640_validate_firmware before ps8640_enter_bl - Add ddc_i2c unregister when probe fail and ps8640_remove drivers/gpu/drm/bridge/Kconfig | 12 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/parade-ps8640.c | 672 +++++++++++++++++++++++++++++++++ 3 files changed, 685 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 1cc9f50..61c6415 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -82,6 +82,18 @@ config DRM_PARADE_PS8622 ---help--- Parade eDP-LVDS bridge chip driver. +config DRM_PARADE_PS8640 + tristate "Parade PS8640 MIPI DSI to eDP Converter" + depends on DRM + depends on OF + select DRM_KMS_HELPER + select DRM_MIPI_DSI + 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 + config DRM_SIL_SII8620 tristate "Silicon Image SII8620 HDMI/MHL bridge" depends on OF diff --git a/drivers/gpu/drm/bridge/Makefile b/drivers/gpu/drm/bridge/Makefile index 4934fcf..14660ab 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -6,6 +6,7 @@ obj-$(CONFIG_DRM_LVDS_ENCODER) += lvds-encoder.o obj-$(CONFIG_DRM_MEGACHIPS_STDPXXXX_GE_B850V3_FW) += megachips-stdpxxxx-ge-b850v3-fw.o obj-$(CONFIG_DRM_NXP_PTN3460) += nxp-ptn3460.o obj-$(CONFIG_DRM_PARADE_PS8622) += parade-ps8622.o +obj-$(CONFIG_DRM_PARADE_PS8640) += parade-ps8640.o obj-$(CONFIG_DRM_SIL_SII8620) += sil-sii8620.o obj-$(CONFIG_DRM_SII902X) += sii902x.o obj-$(CONFIG_DRM_SII9234) += sii9234.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..ac27010 --- /dev/null +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -0,0 +1,672 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2016 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 +#include + +#define PAGE1_VSTART 0x6b +#define PAGE2_SPI_CFG3 0x82 +#define I2C_TO_SPI_RESET 0x20 +#define PAGE2_ROMADD_BYTE1 0x8e +#define PAGE2_ROMADD_BYTE2 0x8f +#define PAGE2_SWSPI_WDATA 0x90 +#define PAGE2_SWSPI_RDATA 0x91 +#define PAGE2_SWSPI_LEN 0x92 +#define PAGE2_SWSPI_CTL 0x93 +#define TRIGGER_NO_READBACK 0x05 +#define TRIGGER_READBACK 0x01 +#define PAGE2_SPI_STATUS 0x9e +#define SPI_READY 0x0c +#define PAGE2_GPIO_L 0xa6 +#define PAGE2_GPIO_H 0xa7 +#define PS_GPIO9 BIT(1) +#define PAGE2_IROM_CTRL 0xb0 +#define IROM_ENABLE 0xc0 +#define IROM_DISABLE 0x80 +#define PAGE2_SW_RESET 0xbc +#define SPI_SW_RESET BIT(7) +#define MPU_SW_RESET BIT(6) +#define PAGE2_ENCTLSPI_WR 0xda +#define PAGE2_I2C_BYPASS 0xea +#define I2C_BYPASS_EN 0xd0 +#define PAGE2_MCS_EN 0xf3 +#define MCS_EN BIT(0) +#define PAGE3_SET_ADD 0xfe +#define PAGE3_SET_VAL 0xff +#define VDO_CTL_ADD 0x13 +#define VDO_DIS 0x18 +#define VDO_EN 0x1c +#define PAGE4_REV_L 0xf0 +#define PAGE4_REV_H 0xf1 +#define PAGE4_CHIP_L 0xf2 +#define PAGE4_CHIP_H 0xf3 + +#define PAGE0_DP_CNTL 0 +#define PAGE1_VDO_BDG 1 +#define PAGE2_TOP_CNTL 2 +#define PAGE3_DSI_CNTL1 3 +#define PAGE4_MIPI_PHY 4 +#define PAGE5_VPLL 5 +#define PAGE6_DSI_CNTL2 6 +#define PAGE7_SPI_CNTL 7 +#define MAX_DEVS 0x8 + +struct ps8640_info { + u8 family_id; + u8 variant_id; + u16 version; +}; + +struct ps8640 { + struct drm_connector connector; + struct drm_bridge bridge; + struct edid *edid; + struct mipi_dsi_device *dsi; + struct i2c_client *page[MAX_DEVS]; + struct regulator_bulk_data supplies[2]; + struct drm_panel *panel; + struct gpio_desc *gpio_reset; + struct gpio_desc *gpio_power_down; + struct gpio_desc *gpio_mode_sel; + bool enabled; + + /* firmware file info */ + struct ps8640_info info; + bool in_fw_update; + /* for firmware update protect */ + struct mutex fw_mutex; +}; + +static const u8 enc_ctrl_code[6] = { 0xaa, 0x55, 0x50, 0x41, 0x52, 0x44 }; +static const u8 hw_chip_id[4] = { 0x00, 0x0a, 0x00, 0x30 }; + +static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) +{ + return container_of(e, struct ps8640, bridge); +} + +static inline struct ps8640 *connector_to_ps8640(struct drm_connector *e) +{ + return container_of(e, struct ps8640, connector); +} + +static int ps8640_read(struct i2c_client *client, u8 reg, u8 *data, + u16 data_len) +{ + int ret; + struct i2c_msg msgs[] = { + { + .addr = client->addr, + .flags = 0, + .len = 1, + .buf = ®, + }, + { + .addr = client->addr, + .flags = I2C_M_RD, + .len = data_len, + .buf = data, + } + }; + + ret = i2c_transfer(client->adapter, msgs, 2); + + if (ret == 2) + return 0; + if (ret < 0) + return ret; + else + return -EIO; +} + +static int ps8640_write_bytes(struct i2c_client *client, const u8 *data, + u16 data_len) +{ + int ret; + struct i2c_msg msg; + + msg.addr = client->addr; + msg.flags = 0; + msg.len = data_len; + msg.buf = (u8 *)data; + + ret = i2c_transfer(client->adapter, &msg, 1); + if (ret == 1) + return 0; + if (ret < 0) + return ret; + else + return -EIO; +} + +static int ps8640_write_byte(struct i2c_client *client, u8 reg, u8 data) +{ + u8 buf[] = { reg, data }; + + return ps8640_write_bytes(client, buf, sizeof(buf)); +} + +static void ps8640_get_mcu_fw_version(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->page[PAGE5_VPLL]; + u8 fw_ver[2]; + + ps8640_read(client, 0x4, fw_ver, sizeof(fw_ver)); + ps_bridge->info.version = (fw_ver[0] << 8) | fw_ver[1]; + + DRM_INFO_ONCE("ps8640 rom fw version %d.%d\n", fw_ver[0], fw_ver[1]); +} + +static int ps8640_bridge_unmute(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_EN }; + + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); +} + +static int ps8640_bridge_mute(struct ps8640 *ps_bridge) +{ + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; + u8 vdo_ctrl_buf[3] = { PAGE3_SET_ADD, VDO_CTL_ADD, VDO_DIS }; + + return ps8640_write_bytes(client, vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); +} + +static void ps8640_pre_enable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + struct i2c_client *client = ps_bridge->page[PAGE2_TOP_CNTL]; + struct i2c_client *page1 = ps_bridge->page[PAGE1_VDO_BDG]; + int err; + u8 set_vdo_done, mcs_en, vstart; + ktime_t timeout; + + if (ps_bridge->in_fw_update) + return; + + if (ps_bridge->enabled) + return; + + err = drm_panel_prepare(ps_bridge->panel); + if (err < 0) { + DRM_ERROR("failed to prepare panel: %d\n", err); + return; + } + + err = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (err < 0) { + DRM_ERROR("cannot enable regulators %d\n", err); + goto err_panel_unprepare; + } + + gpiod_set_value(ps_bridge->gpio_power_down, 1); + gpiod_set_value(ps_bridge->gpio_reset, 0); + usleep_range(2000, 2500); + gpiod_set_value(ps_bridge->gpio_reset, 1); + + /* + * Wait for the ps8640 embed mcu ready + * First wait 200ms and then check the mcu ready flag every 20ms + */ + msleep(200); + + timeout = ktime_add_ms(ktime_get(), 200); + for (;;) { + err = ps8640_read(client, PAGE2_GPIO_H, &set_vdo_done, 1); + if (err < 0) { + DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", err); + goto err_regulators_disable; + } + if ((set_vdo_done & PS_GPIO9) == PS_GPIO9) + break; + if (ktime_compare(ktime_get(), timeout) > 0) + break; + msleep(20); + } + + msleep(50); + + ps8640_read(page1, PAGE1_VSTART, &vstart, 1); + DRM_INFO("PS8640 PAGE1.0x6B = 0x%x\n", vstart); + + /** + * The Manufacturer Command Set (MCS) is a device dependent interface + * intended for factory programming of the display module default + * parameters. Once the display module is configured, the MCS shall be + * disabled by the manufacturer. Once disabled, all MCS commands are + * ignored by the display interface. + */ + ps8640_read(client, PAGE2_MCS_EN, &mcs_en, 1); + ps8640_write_byte(client, PAGE2_MCS_EN, mcs_en & ~MCS_EN); + + if (ps_bridge->info.version == 0) + ps8640_get_mcu_fw_version(ps_bridge); + + err = ps8640_bridge_unmute(ps_bridge); + if (err) + DRM_ERROR("failed to enable unmutevideo: %d\n", err); + /* Switch access edp panel's edid through i2c */ + ps8640_write_byte(client, PAGE2_I2C_BYPASS, I2C_BYPASS_EN); + ps_bridge->enabled = true; + + return; + +err_regulators_disable: + regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); +err_panel_unprepare: + drm_panel_unprepare(ps_bridge->panel); +} + +static void ps8640_enable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int err; + + err = drm_panel_enable(ps_bridge->panel); + if (err < 0) + DRM_ERROR("failed to enable panel: %d\n", err); +} + +static void ps8640_disable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int err; + + err = drm_panel_disable(ps_bridge->panel); + if (err < 0) + DRM_ERROR("failed to disable panel: %d\n", err); +} + +static void ps8640_post_disable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int err; + + if (ps_bridge->in_fw_update) + return; + + if (!ps_bridge->enabled) + return; + + ps_bridge->enabled = false; + + err = ps8640_bridge_mute(ps_bridge); + if (err < 0) + DRM_ERROR("failed to unmutevideo: %d\n", err); + + gpiod_set_value(ps_bridge->gpio_reset, 0); + gpiod_set_value(ps_bridge->gpio_power_down, 0); + err = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (err < 0) + DRM_ERROR("cannot disable regulators %d\n", err); + + err = drm_panel_unprepare(ps_bridge->panel); + if (err) + DRM_ERROR("failed to unprepare panel: %d\n", err); +} + +static int ps8640_get_modes(struct drm_connector *connector) +{ + struct ps8640 *ps_bridge = connector_to_ps8640(connector); + struct edid *edid; + int num_modes = 0; + bool power_off; + + if (ps_bridge->edid) + return drm_add_edid_modes(connector, ps_bridge->edid); + + power_off = !ps_bridge->enabled; + ps8640_pre_enable(&ps_bridge->bridge); + + edid = drm_get_edid(connector, ps_bridge->page[0]->adapter); + if (!edid) + goto out; + + ps_bridge->edid = edid; + drm_connector_update_edid_property(connector, ps_bridge->edid); + num_modes = drm_add_edid_modes(connector, ps_bridge->edid); + +out: + if (power_off) + ps8640_post_disable(&ps_bridge->bridge); + + return num_modes; +} + +static const struct drm_connector_helper_funcs ps8640_connector_helper_funcs = { + .get_modes = ps8640_get_modes, +}; + +static enum drm_connector_status ps8640_detect(struct drm_connector *connector, + bool force) +{ + return connector_status_connected; +} + +static const struct drm_connector_funcs ps8640_connector_funcs = { + .fill_modes = drm_helper_probe_single_connector_modes, + .detect = ps8640_detect, + .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); + struct device *dev = &ps_bridge->page[0]->dev; + struct device_node *in_ep, *dsi_node = NULL; + struct mipi_dsi_device *dsi; + struct mipi_dsi_host *host = NULL; + int ret; + const struct mipi_dsi_device_info info = { .type = "ps8640", + .channel = 0, + .node = NULL, + }; + + 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: %d\n", ret); + return ret; + } + + drm_connector_helper_add(&ps_bridge->connector, + &ps8640_connector_helper_funcs); + + ps_bridge->connector.dpms = DRM_MODE_DPMS_ON; + drm_connector_attach_encoder(&ps_bridge->connector, + bridge->encoder); + + if (ps_bridge->panel) + drm_panel_attach(ps_bridge->panel, &ps_bridge->connector); + + /* port@0 is ps8640 dsi input port */ + in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); + if (in_ep) { + dsi_node = of_graph_get_remote_port_parent(in_ep); + of_node_put(in_ep); + } + + if (dsi_node) { + host = of_find_mipi_dsi_host_by_node(dsi_node); + of_node_put(dsi_node); + if (!host) { + ret = -ENODEV; + goto err; + } + } + + dsi = mipi_dsi_device_register_full(host, &info); + if (IS_ERR(dsi)) { + dev_err(dev, "failed to create dsi device\n"); + ret = PTR_ERR(dsi); + goto err; + } + + ps_bridge->dsi = dsi; + + dsi->host = host; + dsi->mode_flags = MIPI_DSI_MODE_VIDEO | + MIPI_DSI_MODE_VIDEO_SYNC_PULSE; + dsi->format = MIPI_DSI_FMT_RGB888; + dsi->lanes = 4; + ret = mipi_dsi_attach(dsi); + if (ret) + goto err_dsi_attach; + + return 0; + +err_dsi_attach: + mipi_dsi_device_unregister(dsi); +err: + if (ps_bridge->panel) + drm_panel_detach(ps_bridge->panel); + drm_connector_cleanup(&ps_bridge->connector); + return ret; +} + +static const struct drm_bridge_funcs ps8640_bridge_funcs = { + .attach = ps8640_bridge_attach, + .disable = ps8640_disable, + .post_disable = ps8640_post_disable, + .pre_enable = ps8640_pre_enable, + .enable = ps8640_enable, +}; + +/* Firmware Version is returned as Major.Minor */ +static ssize_t fw_version_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ps8640 *ps_bridge = dev_get_drvdata(dev); + struct ps8640_info *info = &ps_bridge->info; + + return scnprintf(buf, PAGE_SIZE, "%u.%u\n", info->version >> 8, + info->version & 0xff); +} + +/* Hardware Version is returned as FamilyID.VariantID */ +static ssize_t hw_version_show(struct device *dev, + struct device_attribute *attr, char *buf) +{ + struct ps8640 *ps_bridge = dev_get_drvdata(dev); + struct ps8640_info *info = &ps_bridge->info; + + return scnprintf(buf, PAGE_SIZE, "ps%u.%u\n", info->family_id, + info->variant_id); +} + +static DEVICE_ATTR_RO(fw_version); +static DEVICE_ATTR_RO(hw_version); + +static struct attribute *ps8640_attrs[] = { + &dev_attr_fw_version.attr, + &dev_attr_hw_version.attr, + NULL +}; + +static const struct attribute_group ps8640_attr_group = { + .attrs = ps8640_attrs, +}; + +static void ps8640_remove_sysfs_group(void *data) +{ + struct ps8640 *ps_bridge = data; + + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); +} + +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 *port, *out_ep; + struct device_node *panel_node = NULL; + int ret; + u32 i; + + ps_bridge = devm_kzalloc(dev, sizeof(*ps_bridge), GFP_KERNEL); + if (!ps_bridge) + return -ENOMEM; + + /* port@1 is ps8640 output port */ + port = of_graph_get_port_by_id(np, 1); + if (port) { + out_ep = of_get_child_by_name(port, "endpoint"); + of_node_put(port); + 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 (IS_ERR(ps_bridge->panel)) + return PTR_ERR(ps_bridge->panel); + } + + mutex_init(&ps_bridge->fw_mutex); + ps_bridge->supplies[0].supply = "vdd33"; + ps_bridge->supplies[1].supply = "vdd12"; + ret = devm_regulator_bulk_get(dev, ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (ret) { + dev_info(dev, "failed to get regulators: %d\n", ret); + return ret; + } + + ps_bridge->gpio_mode_sel = devm_gpiod_get_optional(&client->dev, + "mode-sel", + GPIOD_OUT_HIGH); + if (IS_ERR(ps_bridge->gpio_mode_sel)) { + ret = PTR_ERR(ps_bridge->gpio_mode_sel); + dev_err(dev, "cannot get mode-sel %d\n", ret); + return ret; + } + + ps_bridge->gpio_power_down = devm_gpiod_get(&client->dev, "sleep", + GPIOD_OUT_LOW); + if (IS_ERR(ps_bridge->gpio_power_down)) { + ret = PTR_ERR(ps_bridge->gpio_power_down); + dev_err(dev, "cannot get sleep: %d\n", ret); + return ret; + } + + /* + * Request the reset pin low to avoid the bridge being + * initialized prematurely + */ + ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset", + GPIOD_OUT_LOW); + if (IS_ERR(ps_bridge->gpio_reset)) { + ret = PTR_ERR(ps_bridge->gpio_reset); + dev_err(dev, "cannot get reset: %d\n", ret); + return ret; + } + + ps_bridge->bridge.funcs = &ps8640_bridge_funcs; + ps_bridge->bridge.of_node = dev->of_node; + + ps_bridge->page[0] = client; + + /* + * ps8640 uses multiple addresses, use dummy devices for them + * page[0]: for DP control + * page[1]: for VIDEO Bridge + * page[2]: for control top + * page[3]: for DSI Link Control1 + * page[4]: for MIPI Phy + * page[5]: for VPLL + * page[6]: for DSI Link Control2 + * page[7]: for spi rom mapping + */ + for (i = 1; i < MAX_DEVS; i++) { + ps_bridge->page[i] = i2c_new_dummy(client->adapter, + client->addr + i); + if (!ps_bridge->page[i]) { + dev_err(dev, "failed i2c dummy device, address%02x\n", + client->addr + i); + ret = -EBUSY; + goto exit_dummy; + } + } + i2c_set_clientdata(client, ps_bridge); + + ret = sysfs_create_group(&client->dev.kobj, &ps8640_attr_group); + if (ret) { + dev_err(dev, "failed to create sysfs entries: %d\n", ret); + goto exit_dummy; + } + + ret = devm_add_action(dev, ps8640_remove_sysfs_group, ps_bridge); + if (ret) { + dev_err(dev, "failed to add sysfs cleanup action: %d\n", ret); + goto exit_remove_sysfs; + } + + drm_bridge_add(&ps_bridge->bridge); + return 0; + +exit_remove_sysfs: + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); +exit_dummy: + while (--i) + i2c_unregister_device(ps_bridge->page[i]); + return ret; +} + +static int ps8640_remove(struct i2c_client *client) +{ + struct ps8640 *ps_bridge = i2c_get_clientdata(client); + int i = MAX_DEVS; + + drm_bridge_remove(&ps_bridge->bridge); + sysfs_remove_group(&ps_bridge->page[0]->dev.kobj, &ps8640_attr_group); + while (--i) + i2c_unregister_device(ps_bridge->page[i]); + + return 0; +} + +static const struct i2c_device_id ps8640_i2c_table[] = { + { "ps8640", 0 }, + { /* sentinel */ }, +}; +MODULE_DEVICE_TABLE(i2c, ps8640_i2c_table); + +static const struct of_device_id ps8640_match[] = { + { .compatible = "parade,ps8640" }, + { /* sentinel */ }, +}; +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 = "ps8640", + .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");