From patchwork Tue Feb 13 17:48:57 2018 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Kieran Bingham X-Patchwork-Id: 10217163 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 7016360329 for ; Tue, 13 Feb 2018 17:49:16 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 5E83428707 for ; Tue, 13 Feb 2018 17:49:16 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 4D7D72881A; Tue, 13 Feb 2018 17:49:16 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) (using TLSv1.2 with cipher DHE-RSA-AES256-GCM-SHA384 (256/256 bits)) (No client certificate requested) by mail.wl.linuxfoundation.org (Postfix) with ESMTPS id AC76E28707 for ; Tue, 13 Feb 2018 17:49:15 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 59D996E2B0; Tue, 13 Feb 2018 17:49:14 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by gabe.freedesktop.org (Postfix) with ESMTPS id AA7096E2B0 for ; Tue, 13 Feb 2018 17:49:12 +0000 (UTC) Received: from localhost.localdomain (cpc89242-aztw30-2-0-cust488.18-1.cable.virginm.net [86.31.129.233]) (using TLSv1.2 with cipher ECDHE-RSA-AES128-SHA256 (128/128 bits)) (No client certificate requested) by mail.kernel.org (Postfix) with ESMTPSA id DCC4F217CC; Tue, 13 Feb 2018 17:49:10 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DCC4F217CC Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=kernel.org Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=kbingham@kernel.org From: Kieran Bingham To: linux-kernel@vger.kernel.org, linux-media@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org Subject: [PATCH v4 5/5] drm: adv7511: Add support for i2c_new_secondary_device Date: Tue, 13 Feb 2018 17:48:57 +0000 Message-Id: <1518544137-2742-6-git-send-email-kbingham@kernel.org> X-Mailer: git-send-email 2.7.4 In-Reply-To: <1518544137-2742-1-git-send-email-kbingham@kernel.org> References: <1518544137-2742-1-git-send-email-kbingham@kernel.org> X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Jean-Michel Hautbois , Kieran Bingham , Kieran Bingham , Sergei Shtylyov MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP From: Kieran Bingham The ADV7511 has four 256-byte maps that can be accessed via the main I2C ports. Each map has it own I2C address and acts as a standard slave device on the I2C bus. Allow a device tree node to override the default addresses so that address conflicts with other devices on the same bus may be resolved at the board description level. Signed-off-by: Kieran Bingham Reviewed-by: Laurent Pinchart --- v2: - Update missing edid-i2c address setting - Split out DT bindings - Rename and move the I2C default addresses to their own section v3: - No change v4: - Change registration order of packet/cec to fix error path and simplify code change. - Collect Laurent's RB tag drivers/gpu/drm/bridge/adv7511/adv7511.h | 6 ++++ drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 42 ++++++++++++++++++---------- 2 files changed, 33 insertions(+), 15 deletions(-) diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h index d034b2cb5eee..73d8ccb97742 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h @@ -93,6 +93,11 @@ #define ADV7511_REG_CHIP_ID_HIGH 0xf5 #define ADV7511_REG_CHIP_ID_LOW 0xf6 +/* Hardware defined default addresses for I2C register maps */ +#define ADV7511_CEC_I2C_ADDR_DEFAULT 0x3c +#define ADV7511_EDID_I2C_ADDR_DEFAULT 0x3f +#define ADV7511_PACKET_I2C_ADDR_DEFAULT 0x38 + #define ADV7511_CSC_ENABLE BIT(7) #define ADV7511_CSC_UPDATE_MODE BIT(5) @@ -321,6 +326,7 @@ enum adv7511_type { struct adv7511 { struct i2c_client *i2c_main; struct i2c_client *i2c_edid; + struct i2c_client *i2c_packet; struct i2c_client *i2c_cec; struct regmap *regmap; diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index efa29db5fc2b..802bc433f54a 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -586,7 +586,7 @@ static int adv7511_get_modes(struct adv7511 *adv7511, /* Reading the EDID only works if the device is powered */ if (!adv7511->powered) { unsigned int edid_i2c_addr = - (adv7511->i2c_main->addr << 1) + 4; + (adv7511->i2c_edid->addr << 1); __adv7511_power_on(adv7511); @@ -969,10 +969,10 @@ static int adv7511_init_cec_regmap(struct adv7511 *adv) { int ret; - adv->i2c_cec = i2c_new_dummy(adv->i2c_main->adapter, - adv->i2c_main->addr - 1); + adv->i2c_cec = i2c_new_secondary_device(adv->i2c_main, "cec", + ADV7511_CEC_I2C_ADDR_DEFAULT); if (!adv->i2c_cec) - return -ENOMEM; + return -EINVAL; i2c_set_clientdata(adv->i2c_cec, adv); adv->regmap_cec = devm_regmap_init_i2c(adv->i2c_cec, @@ -1082,8 +1082,6 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) struct adv7511_link_config link_config; struct adv7511 *adv7511; struct device *dev = &i2c->dev; - unsigned int main_i2c_addr = i2c->addr << 1; - unsigned int edid_i2c_addr = main_i2c_addr + 4; unsigned int val; int ret; @@ -1153,23 +1151,34 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) if (ret) goto uninit_regulators; - regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, edid_i2c_addr); - regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR, - main_i2c_addr - 0xa); - regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, - main_i2c_addr - 2); - adv7511_packet_disable(adv7511, 0xffff); - adv7511->i2c_edid = i2c_new_dummy(i2c->adapter, edid_i2c_addr >> 1); + adv7511->i2c_edid = i2c_new_secondary_device(i2c, "edid", + ADV7511_EDID_I2C_ADDR_DEFAULT); if (!adv7511->i2c_edid) { - ret = -ENOMEM; + ret = -EINVAL; goto uninit_regulators; } + regmap_write(adv7511->regmap, ADV7511_REG_EDID_I2C_ADDR, + adv7511->i2c_edid->addr << 1); + + adv7511->i2c_packet = i2c_new_secondary_device(i2c, "packet", + ADV7511_PACKET_I2C_ADDR_DEFAULT); + if (!adv7511->i2c_packet) { + ret = -EINVAL; + goto err_i2c_unregister_edid; + } + + regmap_write(adv7511->regmap, ADV7511_REG_PACKET_I2C_ADDR, + adv7511->i2c_packet->addr << 1); + ret = adv7511_init_cec_regmap(adv7511); if (ret) - goto err_i2c_unregister_edid; + goto err_i2c_unregister_packet; + + regmap_write(adv7511->regmap, ADV7511_REG_CEC_I2C_ADDR, + adv7511->i2c_cec->addr << 1); INIT_WORK(&adv7511->hpd_work, adv7511_hpd_work); @@ -1207,6 +1216,8 @@ static int adv7511_probe(struct i2c_client *i2c, const struct i2c_device_id *id) i2c_unregister_device(adv7511->i2c_cec); if (adv7511->cec_clk) clk_disable_unprepare(adv7511->cec_clk); +err_i2c_unregister_packet: + i2c_unregister_device(adv7511->i2c_packet); err_i2c_unregister_edid: i2c_unregister_device(adv7511->i2c_edid); uninit_regulators: @@ -1233,6 +1244,7 @@ static int adv7511_remove(struct i2c_client *i2c) cec_unregister_adapter(adv7511->cec_adap); + i2c_unregister_device(adv7511->i2c_packet); i2c_unregister_device(adv7511->i2c_edid); return 0;