From patchwork Tue Aug 22 11:30:14 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Imre Deak X-Patchwork-Id: 13360506 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org 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 smtp.lore.kernel.org (Postfix) with ESMTPS id A746AEE4996 for ; Tue, 22 Aug 2023 11:30:05 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 83F2710E300; Tue, 22 Aug 2023 11:30:04 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id ACC3A10E05B; Tue, 22 Aug 2023 11:30:02 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1692703802; x=1724239802; h=from:to:cc:subject:date:message-id:mime-version: content-transfer-encoding; bh=GGGF5+5clAnbTw18HrSaM87xI6XEZZlGcfnRBzEuPko=; b=TQGv7UJIqyVf31qA4VEKReSO9a+hESUvMXpPLzFUWqgytbHTT+aG1Ra9 v3nsh40Zhz71yI5hoZB6M4PDFVprbGdDU4ufN0ZyaurFkQCLnOdQ6u+zi MMwdfYBIqTkGOTJZCkcJ1bwk60cZDhB2zqHNQs5zfeb6IxwHDNEDRRjKv MlvpIMh6GrjrIjpfJvFNJIXworec+30eUN04D9yNjtQ5YiGMa8+BWSj4Z EJyWUezymM/oouQmnVqCF/P6ZAffGW4y0hbiaM2IoMBANnOmBSVWKXuHS pLMpSd6FXk7jR3/+XZt35Xbgx7+6a66CykJ8BnVEkDqKp7FEFU8zQl8WC g==; X-IronPort-AV: E=McAfee;i="6600,9927,10809"; a="377611505" X-IronPort-AV: E=Sophos;i="6.01,192,1684825200"; d="scan'208";a="377611505" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Aug 2023 04:30:02 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10809"; a="859886947" X-IronPort-AV: E=Sophos;i="6.01,192,1684825200"; d="scan'208";a="859886947" Received: from ideak-desk.fi.intel.com ([10.237.72.78]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Aug 2023 04:30:00 -0700 From: Imre Deak To: intel-gfx@lists.freedesktop.org Date: Tue, 22 Aug 2023 14:30:14 +0300 Message-Id: <20230822113015.41224-1-imre.deak@intel.com> X-Mailer: git-send-email 2.37.2 MIME-Version: 1.0 Subject: [Intel-gfx] [CI 1/2] drm: Add an HPD poll helper to reschedule the poll work X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Dmitry Baryshkov , dri-devel@lists.freedesktop.org, stable@vger.kernel.org Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Add a helper to reschedule drm_mode_config::output_poll_work after polling has been enabled for a connector (and needing a reschedule, since previously polling was disabled for all connectors and hence output_poll_work was not running). This is needed by the next patch fixing HPD polling on i915. CC: stable@vger.kernel.org # 6.4+ Cc: Dmitry Baryshkov Cc: dri-devel@lists.freedesktop.org Reviewed-by: Jouni Högander Reviewed-by: Dmitry Baryshkov Signed-off-by: Imre Deak --- drivers/gpu/drm/drm_probe_helper.c | 68 ++++++++++++++++++++---------- include/drm/drm_probe_helper.h | 1 + 2 files changed, 47 insertions(+), 22 deletions(-) diff --git a/drivers/gpu/drm/drm_probe_helper.c b/drivers/gpu/drm/drm_probe_helper.c index 2fb9bf901a2cc..3f479483d7d80 100644 --- a/drivers/gpu/drm/drm_probe_helper.c +++ b/drivers/gpu/drm/drm_probe_helper.c @@ -262,6 +262,26 @@ static bool drm_kms_helper_enable_hpd(struct drm_device *dev) } #define DRM_OUTPUT_POLL_PERIOD (10*HZ) +static void reschedule_output_poll_work(struct drm_device *dev) +{ + unsigned long delay = DRM_OUTPUT_POLL_PERIOD; + + if (dev->mode_config.delayed_event) + /* + * FIXME: + * + * Use short (1s) delay to handle the initial delayed event. + * This delay should not be needed, but Optimus/nouveau will + * fail in a mysterious way if the delayed event is handled as + * soon as possible like it is done in + * drm_helper_probe_single_connector_modes() in case the poll + * was enabled before. + */ + delay = HZ; + + schedule_delayed_work(&dev->mode_config.output_poll_work, delay); +} + /** * drm_kms_helper_poll_enable - re-enable output polling. * @dev: drm_device @@ -279,37 +299,41 @@ static bool drm_kms_helper_enable_hpd(struct drm_device *dev) */ void drm_kms_helper_poll_enable(struct drm_device *dev) { - bool poll = false; - unsigned long delay = DRM_OUTPUT_POLL_PERIOD; - if (!dev->mode_config.poll_enabled || !drm_kms_helper_poll || dev->mode_config.poll_running) return; - poll = drm_kms_helper_enable_hpd(dev); - - if (dev->mode_config.delayed_event) { - /* - * FIXME: - * - * Use short (1s) delay to handle the initial delayed event. - * This delay should not be needed, but Optimus/nouveau will - * fail in a mysterious way if the delayed event is handled as - * soon as possible like it is done in - * drm_helper_probe_single_connector_modes() in case the poll - * was enabled before. - */ - poll = true; - delay = HZ; - } - - if (poll) - schedule_delayed_work(&dev->mode_config.output_poll_work, delay); + if (drm_kms_helper_enable_hpd(dev) || + dev->mode_config.delayed_event) + reschedule_output_poll_work(dev); dev->mode_config.poll_running = true; } EXPORT_SYMBOL(drm_kms_helper_poll_enable); +/** + * drm_kms_helper_poll_reschedule - reschedule the output polling work + * @dev: drm_device + * + * This function reschedules the output polling work, after polling for a + * connector has been enabled. + * + * Drivers must call this helper after enabling polling for a connector by + * setting %DRM_CONNECTOR_POLL_CONNECT / %DRM_CONNECTOR_POLL_DISCONNECT flags + * in drm_connector::polled. Note that after disabling polling by clearing these + * flags for a connector will stop the output polling work automatically if + * the polling is disabled for all other connectors as well. + * + * The function can be called only after polling has been enabled by calling + * drm_kms_helper_poll_init() / drm_kms_helper_poll_enable(). + */ +void drm_kms_helper_poll_reschedule(struct drm_device *dev) +{ + if (dev->mode_config.poll_running) + reschedule_output_poll_work(dev); +} +EXPORT_SYMBOL(drm_kms_helper_poll_reschedule); + static enum drm_connector_status drm_helper_probe_detect_ctx(struct drm_connector *connector, bool force) { diff --git a/include/drm/drm_probe_helper.h b/include/drm/drm_probe_helper.h index 4977e0ab72dbb..fad3c4003b2b5 100644 --- a/include/drm/drm_probe_helper.h +++ b/include/drm/drm_probe_helper.h @@ -25,6 +25,7 @@ void drm_kms_helper_connector_hotplug_event(struct drm_connector *connector); void drm_kms_helper_poll_disable(struct drm_device *dev); void drm_kms_helper_poll_enable(struct drm_device *dev); +void drm_kms_helper_poll_reschedule(struct drm_device *dev); bool drm_kms_helper_is_poll_worker(void); enum drm_mode_status drm_crtc_helper_mode_valid_fixed(struct drm_crtc *crtc,