From patchwork Fri Sep 17 22:39:01 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Philip Chen X-Patchwork-Id: 12503071 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-19.1 required=3.0 tests=BAYES_00,DKIMWL_WL_HIGH, DKIM_SIGNED,DKIM_VALID,DKIM_VALID_AU,HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER,INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS, URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 48C89C433EF for ; Fri, 17 Sep 2021 22:39:11 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (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 10A246113A for ; Fri, 17 Sep 2021 22:39:11 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.4.1 mail.kernel.org 10A246113A Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=chromium.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 1DD996E0BF; Fri, 17 Sep 2021 22:39:10 +0000 (UTC) Received: from mail-pg1-x52a.google.com (mail-pg1-x52a.google.com [IPv6:2607:f8b0:4864:20::52a]) by gabe.freedesktop.org (Postfix) with ESMTPS id 207146E0BF for ; Fri, 17 Sep 2021 22:39:08 +0000 (UTC) Received: by mail-pg1-x52a.google.com with SMTP id r2so10952168pgl.10 for ; Fri, 17 Sep 2021 15:39:08 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=chromium.org; s=google; h=from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=2/rOcOavU9zDghgpvdrNudzstRLQ0FLsHzg1+2it0Wo=; b=inFPbKtH0NMd2NABu2MN0k8Vu3eyFOIlzbmDDMX9+U6Hqf9pMnXAS99mzmqQvmlbL0 +vizYoGouznBfK7gfBgjkUg7fqbWQUdyEtlX1vrIFWYsJ8qXqdCNz3v6PlE9Y3hWzNSL K3P8i0Z3xeQXcSr1HpacqIq26TnYKmmrYMVRw= X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20210112; h=x-gm-message-state:from:to:cc:subject:date:message-id:mime-version :content-transfer-encoding; bh=2/rOcOavU9zDghgpvdrNudzstRLQ0FLsHzg1+2it0Wo=; b=O9gTrOKPv90lZMTmQD9w6uIwr0Bj25Q33uetxIw0zfdxDkK1V9+Lkk2CdG3zaslmxQ e9QErFVu+WwM8KUE+r5hmEQZ81m/ZorcSiXt8GNIZug/GuOrdOVJ27/zVwkqmYFZRY2l bBW2lG+Vwjp77xWPAQVOrMAUIImTwrVNnNQFnrK3NI5U2NAD6cTlttbA+1FsHSjckjoa OBPur4qZzQTrT9GXiAugZdFXFhIrXIq3ecn7cF5LUa9Y1EtCv2VGwN7JEYr8q9KuqmXx eKuq89ZwjmDTIuFusl2BdbTEbN+rukNjHGDTLk0Aov6QPcLDZyaKzyt2ihX7Qo+lmSIO kn8Q== X-Gm-Message-State: AOAM531ZcQ916tOOPuo3DGuRpIBf2NCOOfRZYvyeBNy7sUg8mHL3ScX+ eSC3Bzbv6BNk+gNrTsUbu5Sy2A== X-Google-Smtp-Source: ABdhPJz4i6+u2um1URE3VfLx/tZT1bEg/qe99Ds3AVSCeWJXbtB2DqqkFaNUPveb48pXZNpFICN+gg== X-Received: by 2002:a62:1702:0:b0:444:d085:6a61 with SMTP id 2-20020a621702000000b00444d0856a61mr5744369pfx.14.1631918347607; Fri, 17 Sep 2021 15:39:07 -0700 (PDT) Received: from philipchen.mtv.corp.google.com ([2620:15c:202:201:487:ba41:bf2c:8c7e]) by smtp.gmail.com with ESMTPSA id y13sm6619486pjc.50.2021.09.17.15.39.05 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Fri, 17 Sep 2021 15:39:06 -0700 (PDT) From: Philip Chen To: LKML Cc: dianders@chromium.org, swboyd@chromium.org, Philip Chen , Andrzej Hajda , Daniel Vetter , David Airlie , Jernej Skrabec , Jonas Karlman , Laurent Pinchart , Neil Armstrong , Robert Foss , dri-devel@lists.freedesktop.org Subject: [PATCH v4 1/2] drm/bridge: parade-ps8640: Use regmap APIs Date: Fri, 17 Sep 2021 15:39:01 -0700 Message-Id: <20210917153835.v4.1.I2351df94f18d5d8debc22d4d100f36fac560409a@changeid> X-Mailer: git-send-email 2.33.0.464.g1972c5931b-goog MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Replace the direct i2c access (i2c_smbus_* functions) with regmap APIs, which will simplify the future update on ps8640 driver. Reviewed-by: Douglas Anderson Signed-off-by: Philip Chen --- Changes in v4: - Remove excessive error logging from the probe function Changes in v3: - Fix the nits from v2 review Changes in v2: - Add separate reg map config per page drivers/gpu/drm/bridge/parade-ps8640.c | 94 ++++++++++++++++++-------- 1 file changed, 64 insertions(+), 30 deletions(-) diff --git a/drivers/gpu/drm/bridge/parade-ps8640.c b/drivers/gpu/drm/bridge/parade-ps8640.c index 685e9c38b2db..18328e75bf90 100644 --- a/drivers/gpu/drm/bridge/parade-ps8640.c +++ b/drivers/gpu/drm/bridge/parade-ps8640.c @@ -9,6 +9,7 @@ #include #include #include +#include #include #include @@ -31,6 +32,11 @@ #define NUM_MIPI_LANES 4 +#define COMMON_PS8640_REGMAP_CONFIG \ + .reg_bits = 8, \ + .val_bits = 8, \ + .cache_type = REGCACHE_NONE + /* * PS8640 uses multiple addresses: * page[0]: for DP control @@ -64,12 +70,48 @@ struct ps8640 { struct drm_bridge *panel_bridge; struct mipi_dsi_device *dsi; struct i2c_client *page[MAX_DEVS]; + struct regmap *regmap[MAX_DEVS]; struct regulator_bulk_data supplies[2]; struct gpio_desc *gpio_reset; struct gpio_desc *gpio_powerdown; bool powered; }; +static const struct regmap_config ps8640_regmap_config[] = { + [PAGE0_DP_CNTL] = { + COMMON_PS8640_REGMAP_CONFIG, + .max_register = 0xbf, + }, + [PAGE1_VDO_BDG] = { + COMMON_PS8640_REGMAP_CONFIG, + .max_register = 0xff, + }, + [PAGE2_TOP_CNTL] = { + COMMON_PS8640_REGMAP_CONFIG, + .max_register = 0xff, + }, + [PAGE3_DSI_CNTL1] = { + COMMON_PS8640_REGMAP_CONFIG, + .max_register = 0xff, + }, + [PAGE4_MIPI_PHY] = { + COMMON_PS8640_REGMAP_CONFIG, + .max_register = 0xff, + }, + [PAGE5_VPLL] = { + COMMON_PS8640_REGMAP_CONFIG, + .max_register = 0x7f, + }, + [PAGE6_DSI_CNTL2] = { + COMMON_PS8640_REGMAP_CONFIG, + .max_register = 0xff, + }, + [PAGE7_SPI_CNTL] = { + COMMON_PS8640_REGMAP_CONFIG, + .max_register = 0xff, + }, +}; + static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) { return container_of(e, struct ps8640, bridge); @@ -78,13 +120,13 @@ static inline struct ps8640 *bridge_to_ps8640(struct drm_bridge *e) 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]; + struct regmap *map = ps_bridge->regmap[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); + ret = regmap_bulk_write(map, PAGE3_SET_ADD, + vdo_ctrl_buf, sizeof(vdo_ctrl_buf)); + if (ret < 0) { DRM_ERROR("failed to %sable VDO: %d\n", ctrl == ENABLE ? "en" : "dis", ret); @@ -96,8 +138,7 @@ static int ps8640_bridge_vdo_control(struct ps8640 *ps_bridge, static void ps8640_bridge_poweron(struct ps8640 *ps_bridge) { - struct i2c_client *client = ps_bridge->page[PAGE2_TOP_CNTL]; - unsigned long timeout; + struct regmap *map = ps_bridge->regmap[PAGE2_TOP_CNTL]; int ret, status; if (ps_bridge->powered) @@ -121,18 +162,12 @@ static void ps8640_bridge_poweron(struct ps8640 *ps_bridge) */ 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; + ret = regmap_read_poll_timeout(map, PAGE2_GPIO_H, status, + status & PS_GPIO9, 20 * 1000, 200 * 1000); - msleep(20); + if (ret < 0) { + DRM_ERROR("failed read PAGE2_GPIO_H: %d\n", ret); + goto err_regulators_disable; } msleep(50); @@ -144,22 +179,15 @@ static void ps8640_bridge_poweron(struct ps8640 *ps_bridge) * 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); + ret = regmap_update_bits(map, PAGE2_MCS_EN, MCS_EN, 0); if (ret < 0) { DRM_ERROR("failed write PAGE2_MCS_EN: %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); + ret = regmap_write(map, PAGE2_I2C_BYPASS, I2C_BYPASS_EN); if (ret < 0) { DRM_ERROR("failed write PAGE2_I2C_BYPASS: %d\n", ret); goto err_regulators_disable; @@ -362,15 +390,21 @@ static int ps8640_probe(struct i2c_client *client) ps_bridge->page[PAGE0_DP_CNTL] = client; + ps_bridge->regmap[PAGE0_DP_CNTL] = devm_regmap_init_i2c(client, ps8640_regmap_config); + if (IS_ERR(ps_bridge->regmap[PAGE0_DP_CNTL])) + return PTR_ERR(ps_bridge->regmap[PAGE0_DP_CNTL]); + 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); + if (IS_ERR(ps_bridge->page[i])) return PTR_ERR(ps_bridge->page[i]); - } + + ps_bridge->regmap[i] = devm_regmap_init_i2c(ps_bridge->page[i], + ps8640_regmap_config + i); + if (IS_ERR(ps_bridge->regmap[i])) + return PTR_ERR(ps_bridge->regmap[i]); } i2c_set_clientdata(client, ps_bridge);