From patchwork Tue Jun 25 09:46:35 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrzej Pietrasiewicz X-Patchwork-Id: 11017171 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id E7F0614BB for ; Wed, 26 Jun 2019 08:12:41 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id D8CF428694 for ; Wed, 26 Jun 2019 08:12:41 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id CCAC8286BF; Wed, 26 Jun 2019 08:12:41 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY 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 7B44D28694 for ; Wed, 26 Jun 2019 08:12:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 7FC4E6E2E4; Wed, 26 Jun 2019 08:12:18 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [46.235.227.227]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4A4676E0B7 for ; Tue, 25 Jun 2019 09:46:48 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: andrzej.p) with ESMTPSA id 90928260A37 From: Andrzej Pietrasiewicz To: Subject: [PATCH 1/2] drm: Include ddc adapter pointer in struct drm_connector Date: Tue, 25 Jun 2019 11:46:35 +0200 Message-Id: <04382593e44ac3f69cd63adfe0dd0660dc32a722.1561452052.git.andrzej.p@collabora.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Mailman-Approved-At: Wed, 26 Jun 2019 08:12:13 +0000 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: linux-samsung-soc@vger.kernel.org, Maxime Ripard , Seung-Woo Kim , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , David Airlie , Kyungmin Park , Kukjin Kim , dri-devel@lists.freedesktop.org, kernel@collabora.com, Sean Paul , linux-arm-kernel@lists.infradead.org, m.szyprowski@samsung.com MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Add generic code which creates symbolic links in sysfs, pointing to ddc interface used by a particular video output. For example: ls -l /sys/class/drm/card0-HDMI-A-1/i2c-2 lrwxrwxrwx 1 root root 0 Jun 24 10:42 /sys/class/drm/card0-HDMI-A-1/i2c-2 \ -> ../../../../soc/13880000.i2c/i2c-2 This makes it easy for user to associate a display with its ddc adapter and use e.g. ddcutil to control the chosen monitor. This patch adds an i2c_adapter pointer to struct drm_connector. Particular drivers can then use it instead of using their own private instance. If a connector contains a ddc, then create a symbolic link in sysfs. Signed-off-by: Andrzej Pietrasiewicz --- drivers/gpu/drm/drm_sysfs.c | 9 +++++++++ include/drm/drm_connector.h | 11 +++++++++++ 2 files changed, 20 insertions(+) diff --git a/drivers/gpu/drm/drm_sysfs.c b/drivers/gpu/drm/drm_sysfs.c index ad10810bc972..627f8ebfc87a 100644 --- a/drivers/gpu/drm/drm_sysfs.c +++ b/drivers/gpu/drm/drm_sysfs.c @@ -294,6 +294,10 @@ int drm_sysfs_connector_add(struct drm_connector *connector) /* Let userspace know we have a new connector */ drm_sysfs_hotplug_event(dev); + if (connector->ddc) + return sysfs_create_link(&connector->kdev->kobj, + &connector->ddc->dev.kobj, + connector->ddc->dev.kobj.name); return 0; } @@ -301,6 +305,11 @@ void drm_sysfs_connector_remove(struct drm_connector *connector) { if (!connector->kdev) return; + + if (connector->ddc) + sysfs_remove_link(&connector->kdev->kobj, + connector->ddc->dev.kobj.name); + DRM_DEBUG("removing \"%s\" from sysfs\n", connector->name); diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index ca745d9feaf5..1ad3d1d54ba7 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -23,6 +23,7 @@ #ifndef __DRM_CONNECTOR_H__ #define __DRM_CONNECTOR_H__ +#include #include #include #include @@ -1308,6 +1309,16 @@ struct drm_connector { * [0]: progressive, [1]: interlaced */ int audio_latency[2]; + + /** + * @ddc: associated ddc adapter. + * A connector usually has its associated ddc adapter. If a driver uses + * this field, then an appropriate symbolic link is created in connector + * sysfs directory to make it easy for the user to tell which i2c + * adapter is for a particular display. + */ + struct i2c_adapter *ddc; + /** * @null_edid_counter: track sinks that give us all zeros for the EDID. * Needed to workaround some HW bugs where we get all 0s From patchwork Tue Jun 25 09:46:36 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Andrzej Pietrasiewicz X-Patchwork-Id: 11017195 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 95D1814BB for ; Wed, 26 Jun 2019 08:13:12 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 88B99286BF for ; Wed, 26 Jun 2019 08:13:12 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 7C9F6286C7; Wed, 26 Jun 2019 08:13:12 +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=-5.2 required=2.0 tests=BAYES_00,MAILING_LIST_MULTI, RCVD_IN_DNSWL_MED,UNPARSEABLE_RELAY 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 3A8FB286BF for ; Wed, 26 Jun 2019 08:13:12 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3EBC06E2D7; Wed, 26 Jun 2019 08:12:36 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from bhuna.collabora.co.uk (bhuna.collabora.co.uk [IPv6:2a00:1098:0:82:1000:25:2eeb:e3e3]) by gabe.freedesktop.org (Postfix) with ESMTPS id F32F56E0B7 for ; Tue, 25 Jun 2019 09:46:50 +0000 (UTC) Received: from [127.0.0.1] (localhost [127.0.0.1]) (Authenticated sender: andrzej.p) with ESMTPSA id 81C05263A26 From: Andrzej Pietrasiewicz To: Subject: [PATCH 2/2] drm/exynos: Provide ddc symlink in connector's sysfs Date: Tue, 25 Jun 2019 11:46:36 +0200 Message-Id: <2bc41fb24348c7c3c89e9f653e694f8ae9b36e20.1561452052.git.andrzej.p@collabora.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: References: In-Reply-To: References: X-Mailman-Approved-At: Wed, 26 Jun 2019 08:12:13 +0000 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: linux-samsung-soc@vger.kernel.org, Maxime Ripard , Seung-Woo Kim , linux-kernel@vger.kernel.org, Krzysztof Kozlowski , David Airlie , Kyungmin Park , Kukjin Kim , dri-devel@lists.freedesktop.org, kernel@collabora.com, Sean Paul , linux-arm-kernel@lists.infradead.org, m.szyprowski@samsung.com MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Switch to using the ddc provided by the generic connector. Signed-off-by: Andrzej Pietrasiewicz --- drivers/gpu/drm/exynos/exynos_hdmi.c | 11 +++++------ 1 file changed, 5 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/exynos/exynos_hdmi.c b/drivers/gpu/drm/exynos/exynos_hdmi.c index 894a99793633..6816e37861b7 100644 --- a/drivers/gpu/drm/exynos/exynos_hdmi.c +++ b/drivers/gpu/drm/exynos/exynos_hdmi.c @@ -126,7 +126,6 @@ struct hdmi_context { void __iomem *regs; void __iomem *regs_hdmiphy; struct i2c_client *hdmiphy_port; - struct i2c_adapter *ddc_adpt; struct gpio_desc *hpd_gpio; int irq; struct regmap *pmureg; @@ -872,10 +871,10 @@ static int hdmi_get_modes(struct drm_connector *connector) struct edid *edid; int ret; - if (!hdata->ddc_adpt) + if (!connector->ddc) return -ENODEV; - edid = drm_get_edid(connector, hdata->ddc_adpt); + edid = drm_get_edid(connector, connector->ddc); if (!edid) return -ENODEV; @@ -1893,7 +1892,7 @@ static int hdmi_get_ddc_adapter(struct hdmi_context *hdata) return -EPROBE_DEFER; } - hdata->ddc_adpt = adpt; + hdata->connector.ddc = adpt; return 0; } @@ -2045,7 +2044,7 @@ static int hdmi_probe(struct platform_device *pdev) if (hdata->regs_hdmiphy) iounmap(hdata->regs_hdmiphy); err_ddc: - put_device(&hdata->ddc_adpt->dev); + put_device(&hdata->connector.ddc->dev); return ret; } @@ -2072,7 +2071,7 @@ static int hdmi_remove(struct platform_device *pdev) if (hdata->regs_hdmiphy) iounmap(hdata->regs_hdmiphy); - put_device(&hdata->ddc_adpt->dev); + put_device(&hdata->connector.ddc->dev); mutex_destroy(&hdata->mutex);