From patchwork Mon Dec 30 09:04:18 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 11312749 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 97ECA109A for ; Mon, 30 Dec 2019 09:04:50 +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 4EF9C2071E for ; Mon, 30 Dec 2019 09:04:50 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="f//JDP4u" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 4EF9C2071E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=GiyPNUZj3zkmuMkus4kx6LkHKE36lfUzdsL+MOKf+GU=; b=f//JDP4uMx6vmk B6lyTIzNddvFQ7ORrh6kSIx8Y4CG8cGiFJ8w8YVP7f/Yh6/IM9shr2zmpin3ejqDHjS5iIqde7Uy1 CecSpbD3yQs0RCprh154o8qLGh0MP/MpjVKc8WjRmgr289DnQNrvbiEA6/L/kTq/mFCpxci9m9oyw ZZZ3VMDq2Fipu2oc8IoDpywmL5vlp2D4gpv3mA3kegMdMRqlpSjbMSidWjEzZuwc0m4qsYl4Kwxvx mb5eIQNVodPIcERthTRIjZasjWB+DMB59ffyNWdhRGqZZLDRLbN2OkxF3PNGo6GYVWrOTngDS8Ece Ypo9i6TDs1Q7LH9Z4msg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ilqyl-0001gf-Fw; Mon, 30 Dec 2019 09:04:47 +0000 Received: from bhuna.collabora.co.uk ([2a00:1098:0:82:1000:25:2eeb:e3e3]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ilqyV-0001UB-OC; Mon, 30 Dec 2019 09:04:33 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id 217D8294174 From: Enric Balletbo i Serra To: linux-kernel@vger.kernel.org Subject: [PATCH v24 1/2] Documentation: bridge: Add documentation for ps8640 DT properties Date: Mon, 30 Dec 2019 10:04:18 +0100 Message-Id: <20191230090419.137141-2-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191230090419.137141-1-enric.balletbo@collabora.com> References: <20191230090419.137141-1-enric.balletbo@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191230_010432_042123_F56BCEEE X-CRM114-Status: GOOD ( 10.73 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@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 , Rob Herring , drinkcat@chromium.org, Jitao Shi , Daniel Vetter , Ulrich Hecht , David Airlie , dri-devel@lists.freedesktop.org, devicetree@vger.kernel.org, Rob Herring , linux-mediatek@lists.infradead.org, Philipp Zabel , hsinyi@chromium.org, matthias.bgg@gmail.com, Collabora Kernel ML , linux-arm-kernel@lists.infradead.org Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=patchwork.kernel.org@lists.infradead.org From: Jitao Shi Add documentation for DT properties supported by ps8640 DSI-eDP converter. Signed-off-by: Jitao Shi Acked-by: Rob Herring Reviewed-by: Philipp Zabel Signed-off-by: Ulrich Hecht Signed-off-by: Enric Balletbo i Serra Reviewed-by: Rob Herring --- I maintained the ack from Rob Herring and the review from Philipp because in essence the only thing I did is migrate to YAML format and check that no errors are reported via dtbs_check. Just let me know if you're not agree. Apart from this note that I removed the mode-sel property because is not used and I renamed sleep-gpios to powerdown-gpios. Changes in v24: None Changes in v23: None Changes in v22: - Migrate to YAML format (Maxime Ripart) - Remove mode-sel property. - Rename sleep-gpios to powerdown-gpios. Changes in v21: None Changes in v19: None Changes in v18: None Changes in v17: None Changes in v16: None Changes in v15: None Changes in v14: None Changes in v13: None Changes in v12: None Changes in v11: None .../bindings/display/bridge/ps8640.yaml | 112 ++++++++++++++++++ 1 file changed, 112 insertions(+) create mode 100644 Documentation/devicetree/bindings/display/bridge/ps8640.yaml diff --git a/Documentation/devicetree/bindings/display/bridge/ps8640.yaml b/Documentation/devicetree/bindings/display/bridge/ps8640.yaml new file mode 100644 index 000000000000..5dff93641bea --- /dev/null +++ b/Documentation/devicetree/bindings/display/bridge/ps8640.yaml @@ -0,0 +1,112 @@ +# SPDX-License-Identifier: (GPL-2.0-only OR BSD-2-Clause) +%YAML 1.2 +--- +$id: http://devicetree.org/schemas/display/bridge/ps8640.yaml# +$schema: http://devicetree.org/meta-schemas/core.yaml# + +title: MIPI DSI to eDP Video Format Converter Device Tree Bindings + +maintainers: + - Nicolas Boichat + - Enric Balletbo i Serra + +description: | + The PS8640 is a low power MIPI-to-eDP video format converter supporting + mobile devices with embedded panel resolutions up to 2048 x 1536. The + device accepts a single channel of MIPI DSI v1.1, with up to four lanes + plus clock, at a transmission rate up to 1.5Gbit/sec per lane. The + device outputs eDP v1.4, one or two lanes, at a link rate of up to + 3.24Gbit/sec per lane. + +properties: + compatible: + const: parade,ps8640 + + reg: + maxItems: 1 + description: Base I2C address of the device. + + powerdown-gpios: + maxItems: 1 + description: GPIO connected to active low powerdown. + + reset-gpios: + maxItems: 1 + description: GPIO connected to active low reset. + + vdd12-supply: + maxItems: 1 + description: Regulator for 1.2V digital core power. + + vdd33-supply: + maxItems: 1 + description: Regulator for 3.3V digital core power. + + ports: + type: object + description: + A node containing DSI input & output port nodes with endpoint + definitions as documented in + Documentation/devicetree/bindings/media/video-interfaces.txt + Documentation/devicetree/bindings/graph.txt + properties: + port@0: + type: object + description: | + Video port for DSI input + + port@1: + type: object + description: | + Video port for eDP output (panel or connector). + + required: + - port@0 + +required: + - compatible + - reg + - powerdown-gpios + - reset-gpios + - vdd12-supply + - vdd33-supply + - ports + +additionalProperties: false + +examples: + - | + #include + i2c0 { + #address-cells = <1>; + #size-cells = <0>; + + ps8640: edp-bridge@18 { + compatible = "parade,ps8640"; + reg = <0x18>; + powerdown-gpios = <&pio 116 GPIO_ACTIVE_LOW>; + reset-gpios = <&pio 115 GPIO_ACTIVE_LOW>; + vdd12-supply = <&ps8640_fixed_1v2>; + vdd33-supply = <&mt6397_vgp2_reg>; + + ports { + #address-cells = <1>; + #size-cells = <0>; + + port@0 { + reg = <0>; + ps8640_in: endpoint { + remote-endpoint = <&dsi0_out>; + }; + }; + + port@1 { + reg = <1>; + ps8640_out: endpoint { + remote-endpoint = <&panel_in>; + }; + }; + }; + }; + }; + From patchwork Mon Dec 30 09:04:19 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Enric Balletbo i Serra X-Patchwork-Id: 11312755 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 B5274138D for ; Mon, 30 Dec 2019 09:05:16 +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 53DE02071E for ; Mon, 30 Dec 2019 09:05:16 +0000 (UTC) Authentication-Results: mail.kernel.org; dkim=pass (2048-bit key) header.d=lists.infradead.org header.i=@lists.infradead.org header.b="oS14Aibj" DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 53DE02071E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=collabora.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=linux-arm-kernel-bounces+patchwork-linux-arm=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:Cc:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version: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=rC+RQMQQxi9M/gSd46d4Z79V/FkFItfBfd8eeZJ3QIU=; b=oS14Aibj6/EyXj lCEqxKu/XZgaRtUzYAXumjK5v6dFUWgugw90TPTC6gQo2dJJLv0JLzgXPQozR4y8q6sONXV15due7 GMegDLLgRS+q2prB02v7RK6UNfIenFXU92OXaN2HLX5QocM603yR0E6iy76UBuO2ALgGQq5sAlTZQ 6BTwDYJIVU3BAL0d5EIdbTXpo91MD+oi7bsguX3S1Bmoc2rwikTfbynk1HDxrRxlH8adnh4BYjgob 9fqEdFE+pCbz+PwTyRO8UqrIXXJ4eJZVrY13tLPX2fAYZeB7I6LY0S3Gt0rXSX9WmDc3ma2xD7E89 3vUEdxaKpKuhoQJXMkAg==; Received: from localhost ([127.0.0.1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.92.3 #3 (Red Hat Linux)) id 1ilqzD-0003CJ-Gt; Mon, 30 Dec 2019 09:05:15 +0000 Received: from bhuna.collabora.co.uk ([46.235.227.227]) by bombadil.infradead.org with esmtps (Exim 4.92.3 #3 (Red Hat Linux)) id 1ilqyW-0001UC-4W; Mon, 30 Dec 2019 09:04:35 +0000 Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: eballetbo) with ESMTPSA id 53C9728D210 From: Enric Balletbo i Serra To: linux-kernel@vger.kernel.org Subject: [PATCH v24 2/2] drm/bridge: Add I2C based driver for ps8640 bridge Date: Mon, 30 Dec 2019 10:04:19 +0100 Message-Id: <20191230090419.137141-3-enric.balletbo@collabora.com> X-Mailer: git-send-email 2.24.1 In-Reply-To: <20191230090419.137141-1-enric.balletbo@collabora.com> References: <20191230090419.137141-1-enric.balletbo@collabora.com> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20191230_010432_440055_E73BEE9F X-CRM114-Status: GOOD ( 22.49 ) X-Spam-Score: -0.0 (/) X-Spam-Report: SpamAssassin version 3.4.2 on bombadil.infradead.org summary: Content analysis details: (-0.0 points) pts rule name description ---- ---------------------- -------------------------------------------------- -0.0 RCVD_IN_DNSWL_NONE RBL: Sender listed at https://www.dnswl.org/, no trust [46.235.227.227 listed in list.dnswl.org] -0.0 SPF_PASS SPF: sender matches SPF record -0.0 SPF_HELO_PASS SPF: HELO matches SPF record 0.0 UNPARSEABLE_RELAY Informational: message has unparseable relay lines X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Ulrich Hecht , Jernej Skrabec , drinkcat@chromium.org, Jitao Shi , Jonas Karlman , David Airlie , Neil Armstrong , Daniel Kurtz , Andrzej Hajda , linux-mediatek@lists.infradead.org, dri-devel@lists.freedesktop.org, Daniel Vetter , hsinyi@chromium.org, matthias.bgg@gmail.com, Collabora Kernel ML , Ezequiel Garcia , linux-arm-kernel@lists.infradead.org, Laurent Pinchart Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+patchwork-linux-arm=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 [uli: followed API changes, removed FW update feature] Signed-off-by: Ulrich Hecht Signed-off-by: Enric Balletbo i Serra Tested-by: Hsin-Yi Wang Reviewed-by: Ezequiel Garcia --- One of the reviews from Laurent was to use 'i2c_new_ancillary_device'. I didn't change this for two reasons. 1) It doesn't have a devm version, so the remove path is more simple using the devm_i2c_new_dummy_device family. 2) IIUC the ancillary function is useful when you want to retrieve the address from the firmware or DT, that's not really the case here, as we have a base address and fixed offset to the base address which I think is not configurable. Let me know if you still think that I should use the ancillary call. Changes in v24: - Fix GPIO polarity as all GPIO descriptors should be handled as active high (Laurent Pinchart) - Make static ps8640_bridge_attach (Ezequiel Garcia) - Use a define for the number of lanes (Ezequiel Garcia) Changes in v23: - Merge mute/unmute functions into one (Nicolas Boichat) - Use enum for ENABLE/DISABLE instead of bool (Ezequiel Garcia) - Rename mute/unmute to vdo_control and fix error messages (Nicolas Boichat and Enric) - Add space between address and address parameter 'address%02x' (Nicolas Boichat) - Add Tested-by Hsin-Yi - Added me as author after the refactor Changes in v22: - Remove sysfs attributes because are not really used (Enric Balletbo) - Use enum for address page offsets (Ezequiel Garcia) - Remove enable tracking (Enric Balletbo) - Use panel_bridge API (Laurent Pinchart) - Do not use kernel-doc format for non kernel-doc formatted commands (Enric Balletbo) - Remove verbose message for PAGE1_VSTART command (Ezequiel Garcia) - Use time_is_after_jiffies idiom (Ezequiel Garcia) - Remove unused macros (Ezequiel Garcia) - Fix weird alignment in dsi->mode_flags (Laurent Pinchart) - Use drm_of_find_panel_or_bridge helper (Laurent Pinchart) - Remove mode-sel-gpios as is not used (Laurent Pinchart) - Remove error messages to get gpios as the core will already report it (Enric Balletbo) - Remove redundant message getting the regulators (Laurent Pinchart) - Rename sleep-gpios to powerdown-gpios (Laurent Pinchart) - Use ARRAY_SIZE(ps_bridge->page) instead of MAX_DEV when possible (Laurent Pinchart) - Fix race with userspace accessing the sysfs attributes (Laurent Pinchart) - Remove id_table as is only used on DR platforms (Laurent Pinchart) - Convert to new i2c device probe() (Laurent Pinchart) - Use i2c_smbus_read/write helpers instead of open coding it (Laurent Pinchart) - Remove unnused global variables (Laurent Pinchart) - Remove unnused fields in ps8640 struct (Laurent Pinchart) - Remove commented-out headers (Laurent Pinchart) Changes in v21: - Use devm_i2c_new_dummy_device and fix build issue using deprecated i2c_new_dummy - Fix build issue due missing drm_bridge.h - Do not remove in ps8640_remove device managed resources Changes in v19: - fixed return value of ps8640_probe() when no panel is found Changes in v18: - followed DRM API changes - use DEVICE_ATTR_RO() - remove firmware update code - add SPDX identifier Changes in 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 in v16: - Disable ps8640 DSI MCS Function. - Rename gpios name more clearly. - Tune the ps8640 power on sequence. Changes in 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 in 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 in 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 in v12: - fix hw_chip_id build warning Changes in 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 | 11 + drivers/gpu/drm/bridge/Makefile | 1 + drivers/gpu/drm/bridge/parade-ps8640.c | 348 +++++++++++++++++++++++++ 3 files changed, 360 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 4734f6993858..3e0a63011723 100644 --- a/drivers/gpu/drm/bridge/Kconfig +++ b/drivers/gpu/drm/bridge/Kconfig @@ -101,6 +101,17 @@ 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 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 1c0c92667ac4..91490c595b38 100644 --- a/drivers/gpu/drm/bridge/Makefile +++ b/drivers/gpu/drm/bridge/Makefile @@ -8,6 +8,7 @@ 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 000000000000..c6c06688aff2 --- /dev/null +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -0,0 +1,348 @@ +// SPDX-License-Identifier: GPL-2.0-only +/* + * Copyright (c) 2016 MediaTek Inc. + */ + +#include +#include +#include +#include +#include +#include +#include + +#include +#include +#include +#include +#include + +#define PAGE2_GPIO_H 0xa7 +#define PS_GPIO9 BIT(1) +#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 VDO_CTL_ADD 0x13 +#define VDO_DIS 0x18 +#define VDO_EN 0x1c +#define DP_NUM_LANES 4 + +/* + * PS8640 uses multiple addresses: + * 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 + */ +enum page_addr_offset { + PAGE0_DP_CNTL = 0, + PAGE1_VDO_BDG, + PAGE2_TOP_CNTL, + PAGE3_DSI_CNTL1, + PAGE4_MIPI_PHY, + PAGE5_VPLL, + PAGE6_DSI_CNTL2, + PAGE7_SPI_CNTL, + MAX_DEVS +}; + +enum ps8640_vdo_control { + DISABLE = VDO_DIS, + ENABLE = VDO_EN, +}; + +struct ps8640 { + struct drm_bridge bridge; + struct drm_bridge *panel_bridge; + struct mipi_dsi_device *dsi; + struct i2c_client *page[MAX_DEVS]; + struct regulator_bulk_data supplies[2]; + struct gpio_desc *gpio_reset; + struct gpio_desc *gpio_powerdown; +}; + +static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) +{ + return container_of(e, struct ps8640, bridge); +} + +static int ps8640_bridge_vdo_control(struct ps8640 *ps_bridge, + const enum ps8640_vdo_control ctrl) +{ + struct i2c_client *client = ps_bridge->page[PAGE3_DSI_CNTL1]; + u8 vdo_ctrl_buf[] = { VDO_CTL_ADD, ctrl }; + int ret; + + ret = i2c_smbus_write_i2c_block_data(client, PAGE3_SET_ADD, + sizeof(vdo_ctrl_buf), + vdo_ctrl_buf); + if (ret < 0) + return ret; + + return 0; +} + +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]; + unsigned long timeout; + int ret, status; + + ret = regulator_bulk_enable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (ret < 0) { + DRM_ERROR("cannot enable regulators %d\n", ret); + return; + } + + gpiod_set_value(ps_bridge->gpio_powerdown, 0); + gpiod_set_value(ps_bridge->gpio_reset, 1); + usleep_range(2000, 2500); + gpiod_set_value(ps_bridge->gpio_reset, 0); + + /* + * Wait for the ps8640 embedded MCU to be ready + * First wait 200ms and then check the MCU ready flag every 20ms + */ + msleep(200); + + timeout = jiffies + msecs_to_jiffies(200) + 1; + + while (time_is_after_jiffies(timeout)) { + status = i2c_smbus_read_byte_data(client, PAGE2_GPIO_H); + if (status < 0) { + DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", status); + goto err_regulators_disable; + } + if ((status & PS_GPIO9) == PS_GPIO9) + break; + + msleep(20); + } + + msleep(50); + + /* + * 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. + */ + status = i2c_smbus_read_byte_data(client, PAGE2_MCS_EN); + if (status < 0) { + DRM_ERROR("failed read PAGE2_MCS_EN: %d\n", status); + goto err_regulators_disable; + } + + ret = i2c_smbus_write_byte_data(client, PAGE2_MCS_EN, + status & ~MCS_EN); + if (ret < 0) { + DRM_ERROR("failed write PAGE2_MCS_EN: %d\n", ret); + goto err_regulators_disable; + } + + ret = ps8640_bridge_vdo_control(ps_bridge, ENABLE); + if (ret) { + DRM_ERROR("failed to enable VDO: %d\n", ret); + goto err_regulators_disable; + } + + /* Switch access edp panel's edid through i2c */ + ret = i2c_smbus_write_byte_data(client, PAGE2_I2C_BYPASS, + I2C_BYPASS_EN); + if (ret < 0) { + DRM_ERROR("failed write PAGE2_I2C_BYPASS: %d\n", ret); + goto err_regulators_disable; + } + + return; + +err_regulators_disable: + regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); +} + +static void ps8640_post_disable(struct drm_bridge *bridge) +{ + struct ps8640 *ps_bridge = bridge_to_ps8640(bridge); + int ret; + + ret = ps8640_bridge_vdo_control(ps_bridge, DISABLE); + if (ret < 0) + DRM_ERROR("failed to disable VDO: %d\n", ret); + + gpiod_set_value(ps_bridge->gpio_reset, 1); + gpiod_set_value(ps_bridge->gpio_powerdown, 1); + ret = regulator_bulk_disable(ARRAY_SIZE(ps_bridge->supplies), + ps_bridge->supplies); + if (ret < 0) + DRM_ERROR("cannot disable regulators %d\n", ret); +} + +static 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; + struct mipi_dsi_device *dsi; + struct mipi_dsi_host *host; + int ret; + const struct mipi_dsi_device_info info = { .type = "ps8640", + .channel = 0, + .node = NULL, + }; + /* port@0 is ps8640 dsi input port */ + in_ep = of_graph_get_endpoint_by_regs(dev->of_node, 0, -1); + if (!in_ep) + return -ENODEV; + + dsi_node = of_graph_get_remote_port_parent(in_ep); + of_node_put(in_ep); + if (!dsi_node) + return -ENODEV; + + host = of_find_mipi_dsi_host_by_node(dsi_node); + of_node_put(dsi_node); + if (!host) + return -ENODEV; + + 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); + return ret; + } + + 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 = DP_NUM_LANES; + ret = mipi_dsi_attach(dsi); + if (ret) + goto err_dsi_attach; + + /* Attach the panel-bridge to the dsi bridge */ + return drm_bridge_attach(bridge->encoder, ps_bridge->panel_bridge, + &ps_bridge->bridge); + +err_dsi_attach: + mipi_dsi_device_unregister(dsi); + return ret; +} + +static const struct drm_bridge_funcs ps8640_bridge_funcs = { + .attach = ps8640_bridge_attach, + .post_disable = ps8640_post_disable, + .pre_enable = ps8640_pre_enable, +}; + +static int ps8640_probe(struct i2c_client *client) +{ + struct device *dev = &client->dev; + struct device_node *np = dev->of_node; + struct ps8640 *ps_bridge; + struct drm_panel *panel; + 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 */ + ret = drm_of_find_panel_or_bridge(np, 1, 0, &panel, NULL); + if (ret < 0) + return ret; + if (!panel) + return -ENODEV; + + panel->connector_type = DRM_MODE_CONNECTOR_eDP; + + ps_bridge->panel_bridge = devm_drm_panel_bridge_add(dev, panel); + if (IS_ERR(ps_bridge->panel_bridge)) + return PTR_ERR(ps_bridge->panel_bridge); + + 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) + return ret; + + ps_bridge->gpio_powerdown = devm_gpiod_get(&client->dev, "powerdown", + GPIOD_OUT_HIGH); + if (IS_ERR(ps_bridge->gpio_powerdown)) + return PTR_ERR(ps_bridge->gpio_powerdown); + + /* + * Assert the reset to avoid the bridge being initialized prematurely + */ + ps_bridge->gpio_reset = devm_gpiod_get(&client->dev, "reset", + GPIOD_OUT_HIGH); + if (IS_ERR(ps_bridge->gpio_reset)) + return PTR_ERR(ps_bridge->gpio_reset); + + ps_bridge->bridge.funcs = &ps8640_bridge_funcs; + ps_bridge->bridge.of_node = dev->of_node; + + ps_bridge->page[PAGE0_DP_CNTL] = client; + + for (i = 1; i < ARRAY_SIZE(ps_bridge->page); i++) { + ps_bridge->page[i] = devm_i2c_new_dummy_device(&client->dev, + client->adapter, + client->addr + i); + if (IS_ERR(ps_bridge->page[i])) { + dev_err(dev, "failed i2c dummy device, address %02x\n", + client->addr + i); + return PTR_ERR(ps_bridge->page[i]); + } + } + + i2c_set_clientdata(client, ps_bridge); + + drm_bridge_add(&ps_bridge->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 of_device_id ps8640_match[] = { + { .compatible = "parade,ps8640" }, + { } +}; +MODULE_DEVICE_TABLE(of, ps8640_match); + +static struct i2c_driver ps8640_driver = { + .probe_new = 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_AUTHOR("Enric Balletbo i Serra "); +MODULE_DESCRIPTION("PARADE ps8640 DSI-eDP converter driver"); +MODULE_LICENSE("GPL v2");