From patchwork Tue Jun 23 18:57:55 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Joshi, Kunal1" X-Patchwork-Id: 11622415 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 0118E618 for ; Wed, 24 Jun 2020 06:58:34 +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 DD84A2072E for ; Wed, 24 Jun 2020 06:58:33 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org DD84A2072E Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D24AF6E7F1; Wed, 24 Jun 2020 06:58:08 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 1EAF188AA0; Wed, 24 Jun 2020 06:58:05 +0000 (UTC) IronPort-SDR: nIsaUiaKiaFteosNwrCPiE7QnwtJZBMNc/IxtIxAZR3N4RkJPvk6DkVNwRojJxeGCs4O2HN0PO 9W5eEESuCKzA== X-IronPort-AV: E=McAfee;i="6000,8403,9661"; a="132782661" X-IronPort-AV: E=Sophos;i="5.75,274,1589266800"; d="scan'208";a="132782661" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 23 Jun 2020 23:58:04 -0700 IronPort-SDR: Fs6Uac2YMqtx5YMLNsgvAIMEvm2DBTRQaCzDjPg+uXuWZ4kK8CdLX4tuZpJboA89fduKWo8WCD moUQmkdSM9+g== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.75,274,1589266800"; d="scan'208";a="301525073" Received: from unknown (HELO joshikun.iind.intel.com) ([10.223.74.209]) by fmsmga004.fm.intel.com with ESMTP; 23 Jun 2020 23:58:02 -0700 From: Kunal Joshi To: Intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH v6 2/3] drm: Introduce epoch counter to drm_connector Date: Wed, 24 Jun 2020 00:27:55 +0530 Message-Id: <20200623185756.19502-3-kunal1.joshi@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20200623185756.19502-1-kunal1.joshi@intel.com> References: <20200623185756.19502-1-kunal1.joshi@intel.com> 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: , Cc: stanislav.lisovskiy@intel.com, daniel.vetter@intel.com, arkadiusz.hiler@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: Stanislav Lisovskiy This counter will be used by drm_helper_probe_detect caller to determine if anything had changed(including edid, connection status and etc). Hardware specific driver detect hooks are responsible for updating this counter when some change is detected to notify the drm part, which can trigger for example hotplug event. Also now call drm_connector_update_edid_property right after we get edid always to make sure there is a unified way to handle edid change, without having to change tons of source code as currently drm_connector_update_edid_property is called only in certain cases like reprobing and not right after edid is actually updated. v2: Added documentation for the new counter. Rename change_counter to epoch_counter. Bugzilla: https://bugs.freedesktop.org/show_bug.cgi?id=105540 Signed-off-by: Stanislav Lisovskiy --- drivers/gpu/drm/drm_connector.c | 16 +++++++++++++ drivers/gpu/drm/drm_edid.c | 6 ++++- drivers/gpu/drm/drm_probe_helper.c | 38 ++++++++++++++++++++++++++---- include/drm/drm_connector.h | 2 ++ 4 files changed, 56 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/drm_connector.c b/drivers/gpu/drm/drm_connector.c index b7bd46033807..332686297e45 100644 --- a/drivers/gpu/drm/drm_connector.c +++ b/drivers/gpu/drm/drm_connector.c @@ -269,6 +269,7 @@ int drm_connector_init(struct drm_device *dev, INIT_LIST_HEAD(&connector->modes); mutex_init(&connector->mutex); connector->edid_blob_ptr = NULL; + connector->epoch_counter = 0; connector->tile_blob_ptr = NULL; connector->status = connector_status_unknown; connector->display_info.panel_orientation = @@ -1979,6 +1980,7 @@ int drm_connector_update_edid_property(struct drm_connector *connector, struct drm_device *dev = connector->dev; size_t size = 0; int ret; + const struct edid *old_edid; /* ignore requests to set edid when overridden */ if (connector->override_edid) @@ -2002,6 +2004,20 @@ int drm_connector_update_edid_property(struct drm_connector *connector, drm_update_tile_info(connector, edid); + if (connector->edid_blob_ptr) { + old_edid = (const struct edid *)connector->edid_blob_ptr->data; + if (old_edid) { + if (!drm_edid_are_equal(edid, old_edid)) { + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Edid was changed.\n", + connector->base.id, connector->name); + + connector->epoch_counter += 1; + DRM_DEBUG_KMS("Updating change counter to %llu\n", + connector->epoch_counter); + } + } + } + drm_object_property_set_value(&connector->base, dev->mode_config.non_desktop_property, connector->display_info.non_desktop); diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 34cabfddcdd3..d029cbd5d037 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -2050,13 +2050,17 @@ EXPORT_SYMBOL(drm_probe_ddc); struct edid *drm_get_edid(struct drm_connector *connector, struct i2c_adapter *adapter) { + struct edid *edid; + if (connector->force == DRM_FORCE_OFF) return NULL; if (connector->force == DRM_FORCE_UNSPECIFIED && !drm_probe_ddc(adapter)) return NULL; - return drm_do_get_edid(connector, drm_do_probe_ddc_edid, adapter); + edid = drm_do_get_edid(connector, drm_do_probe_ddc_edid, adapter); + drm_connector_update_edid_property(connector, edid); + return edid; } EXPORT_SYMBOL(drm_get_edid); diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 26e997f1524f..1d5f319d6213 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -290,6 +290,9 @@ drm_helper_probe_detect_ctx(struct drm_connector *connector, bool force) if (WARN_ON(ret < 0)) ret = connector_status_unknown; + if (ret != connector->status) + connector->epoch_counter += 1; + drm_modeset_drop_locks(&ctx); drm_modeset_acquire_fini(&ctx); @@ -323,11 +326,16 @@ drm_helper_probe_detect(struct drm_connector *connector, return ret; if (funcs->detect_ctx) - return funcs->detect_ctx(connector, ctx, force); + ret = funcs->detect_ctx(connector, ctx, force); else if (connector->funcs->detect) - return connector->funcs->detect(connector, force); + ret = connector->funcs->detect(connector, force); else - return connector_status_connected; + ret = connector_status_connected; + + if (ret != connector->status) + connector->epoch_counter += 1; + + return ret; } EXPORT_SYMBOL(drm_helper_probe_detect); @@ -777,6 +785,7 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev) struct drm_connector_list_iter conn_iter; enum drm_connector_status old_status; bool changed = false; + uint64_t old_epoch_counter; if (!dev->mode_config.poll_enabled) return false; @@ -790,20 +799,39 @@ bool drm_helper_hpd_irq_event(struct drm_device *dev) old_status = connector->status; + old_epoch_counter = connector->epoch_counter; + + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] Old epoch counter %llu\n", connector->base.id, + connector->name, + old_epoch_counter); + connector->status = drm_helper_probe_detect(connector, NULL, false); DRM_DEBUG_KMS("[CONNECTOR:%d:%s] status updated from %s to %s\n", connector->base.id, connector->name, drm_get_connector_status_name(old_status), drm_get_connector_status_name(connector->status)); - if (old_status != connector->status) + + DRM_DEBUG_KMS("[CONNECTOR:%d:%s] New epoch counter %llu\n", + connector->base.id, + connector->name, + connector->epoch_counter); + + /* + * Check if epoch counter had changed, meaning that we need + * to send a uevent. + */ + if (old_epoch_counter != connector->epoch_counter) { changed = true; + } } drm_connector_list_iter_end(&conn_iter); mutex_unlock(&dev->mode_config.mutex); - if (changed) + if (changed) { drm_kms_helper_hotplug_event(dev); + DRM_DEBUG_KMS("Sent hotplug event\n"); + } return changed; } diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index fd543d1db9b2..20bdc16eefe2 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -1329,6 +1329,8 @@ struct drm_connector { enum drm_connector_force force; /** @override_edid: has the EDID been overwritten through debugfs for testing? */ bool override_edid; + /** @epoch_counter: used to detect any other changes in connector, besides status */ + uint64_t epoch_counter; /** * @possible_encoders: Bit mask of encoders that can drive this