From patchwork Tue Jun 8 08:54:14 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Gwan-gyeong Mun X-Patchwork-Id: 12305903 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=-16.8 required=3.0 tests=BAYES_00, 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 C9085C47082 for ; Tue, 8 Jun 2021 08:54:25 +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 94D9B610C7 for ; Tue, 8 Jun 2021 08:54:25 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 94D9B610C7 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 2244C6EB4C; Tue, 8 Jun 2021 08:54:25 +0000 (UTC) Received: from mga09.intel.com (mga09.intel.com [134.134.136.24]) by gabe.freedesktop.org (Postfix) with ESMTPS id 85C8389A14 for ; Tue, 8 Jun 2021 08:54:23 +0000 (UTC) IronPort-SDR: +Mzc1k7DKzUS/XhDhrN3LEATOSfBOtuOpqetUbzmd5r+K5N9osE+8imHCvbcvOhpvDdIkcEZqF PEk7Nnqu440g== X-IronPort-AV: E=McAfee;i="6200,9189,10008"; a="204769663" X-IronPort-AV: E=Sophos;i="5.83,257,1616482800"; d="scan'208";a="204769663" Received: from fmsmga001.fm.intel.com ([10.253.24.23]) by orsmga102.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jun 2021 01:54:22 -0700 IronPort-SDR: M3MWX3Rv0Kdo+UER5aYVRpmO0wJaBslIeT/CF7o7uRFkhfAqZqqPrefQHbIY9OZDNM5qoOUOJL d57Mr2WvAe5A== X-IronPort-AV: E=Sophos;i="5.83,257,1616482800"; d="scan'208";a="552206956" Received: from unknown (HELO helsinki.fi.intel.com) ([10.237.72.166]) by fmsmga001-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 08 Jun 2021 01:54:20 -0700 From: Gwan-gyeong Mun To: intel-gfx@lists.freedesktop.org Date: Tue, 8 Jun 2021 11:54:14 +0300 Message-Id: <20210608085415.515342-1-gwan-gyeong.mun@intel.com> X-Mailer: git-send-email 2.31.1 MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH v4 1/2] drm/i915/display: Introduce new intel_psr_pause/resume function 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" This introduces the following function that can exit and activate a psr source when intel_psr is already enabled. - intel_psr_pause(): Pause current PSR. It deactivates current psr state. - intel_psr_resume(): Resume paused PSR. It activates paused psr state. v2: Address Jose's review comment. - Remove unneeded changes around the intel_psr_enable(). - Add intel_psr_post_exit() which processes waiting until PSR is idle and WA for SelectiveFetch. v3: Address Jose's review comment. - Rename intel_psr_post_exit() to intel_psr_wait_exit_locked(). - Move WA_1408330847 to intel_psr_disable_locked() - If the PSR is paused by an explicit intel_psr_paused() call, make the intel_psr_flush() not to activate PSR. v4: Address Jose's review comment. - In order to avoid the scenario of PSR is not active but there is a scheduled psr->work, it changes the check routine of intel_psr_pause() for PSR's enablement from "psr->active" to "psr->enable". Cc: José Roberto de Souza Cc: Stanislav Lisovskiy Cc: Ville Syrjälä Signed-off-by: Gwan-gyeong Mun Signed-off-by: Matt Roper Reviewed-by: José Roberto de Souza --- .../drm/i915/display/intel_display_types.h | 1 + drivers/gpu/drm/i915/display/intel_psr.c | 94 ++++++++++++++++--- drivers/gpu/drm/i915/display/intel_psr.h | 2 + 3 files changed, 86 insertions(+), 11 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index b8d1f702d808..ee7cbdd7db87 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1482,6 +1482,7 @@ struct intel_psr { bool sink_support; bool source_support; bool enabled; + bool paused; enum pipe pipe; enum transcoder transcoder; bool active; diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index 000e1ffe8c05..77865cf6641f 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -1113,6 +1113,7 @@ static void intel_psr_enable_locked(struct intel_dp *intel_dp, intel_psr_enable_sink(intel_dp); intel_psr_enable_source(intel_dp); intel_dp->psr.enabled = true; + intel_dp->psr.paused = false; intel_psr_activate(intel_dp); } @@ -1182,22 +1183,12 @@ static void intel_psr_exit(struct intel_dp *intel_dp) intel_dp->psr.active = false; } -static void intel_psr_disable_locked(struct intel_dp *intel_dp) +static void intel_psr_wait_exit_locked(struct intel_dp *intel_dp) { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); i915_reg_t psr_status; u32 psr_status_mask; - lockdep_assert_held(&intel_dp->psr.lock); - - if (!intel_dp->psr.enabled) - return; - - drm_dbg_kms(&dev_priv->drm, "Disabling PSR%s\n", - intel_dp->psr.psr2_enabled ? "2" : "1"); - - intel_psr_exit(intel_dp); - if (intel_dp->psr.psr2_enabled) { psr_status = EDP_PSR2_STATUS(intel_dp->psr.transcoder); psr_status_mask = EDP_PSR2_STATUS_STATE_MASK; @@ -1210,6 +1201,22 @@ static void intel_psr_disable_locked(struct intel_dp *intel_dp) if (intel_de_wait_for_clear(dev_priv, psr_status, psr_status_mask, 2000)) drm_err(&dev_priv->drm, "Timed out waiting PSR idle state\n"); +} + +static void intel_psr_disable_locked(struct intel_dp *intel_dp) +{ + struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); + + lockdep_assert_held(&intel_dp->psr.lock); + + if (!intel_dp->psr.enabled) + return; + + drm_dbg_kms(&dev_priv->drm, "Disabling PSR%s\n", + intel_dp->psr.psr2_enabled ? "2" : "1"); + + intel_psr_exit(intel_dp); + intel_psr_wait_exit_locked(intel_dp); /* WA 1408330847 */ if (intel_dp->psr.psr2_sel_fetch_enabled && @@ -1254,6 +1261,61 @@ void intel_psr_disable(struct intel_dp *intel_dp, cancel_delayed_work_sync(&intel_dp->psr.dc3co_work); } +/** + * intel_psr_pause - Pause PSR + * @intel_dp: Intel DP + * + * This function need to be called after enabling psr. + */ +void intel_psr_pause(struct intel_dp *intel_dp) +{ + struct intel_psr *psr = &intel_dp->psr; + + if (!CAN_PSR(intel_dp)) + return; + + mutex_lock(&psr->lock); + + if (!psr->enabled) { + mutex_unlock(&psr->lock); + return; + } + + intel_psr_exit(intel_dp); + intel_psr_wait_exit_locked(intel_dp); + psr->paused = true; + + mutex_unlock(&psr->lock); + + cancel_work_sync(&psr->work); + cancel_delayed_work_sync(&psr->dc3co_work); +} + +/** + * intel_psr_resume - Resume PSR + * @intel_dp: Intel DP + * + * This function need to be called after pausing psr. + */ +void intel_psr_resume(struct intel_dp *intel_dp) +{ + struct intel_psr *psr = &intel_dp->psr; + + if (!CAN_PSR(intel_dp)) + return; + + mutex_lock(&psr->lock); + + if (!psr->paused) + goto unlock; + + psr->paused = false; + intel_psr_activate(intel_dp); + +unlock: + mutex_unlock(&psr->lock); +} + static void psr_force_hw_tracking_exit(struct intel_dp *intel_dp) { struct drm_i915_private *dev_priv = dp_to_i915(intel_dp); @@ -1908,6 +1970,16 @@ void intel_psr_flush(struct drm_i915_private *dev_priv, INTEL_FRONTBUFFER_ALL_MASK(intel_dp->psr.pipe); intel_dp->psr.busy_frontbuffer_bits &= ~pipe_frontbuffer_bits; + /* + * If the PSR is paused by an explicit intel_psr_paused() call, + * we have to ensure that the PSR is not activated until + * intel_psr_resume() is called. + */ + if (intel_dp->psr.paused) { + mutex_unlock(&intel_dp->psr.lock); + continue; + } + /* By definition flush = invalidate + flush */ if (pipe_frontbuffer_bits) psr_force_hw_tracking_exit(intel_dp); diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h index e3db85e97f4c..641521b101c8 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.h +++ b/drivers/gpu/drm/i915/display/intel_psr.h @@ -51,5 +51,7 @@ void intel_psr2_program_plane_sel_fetch(struct intel_plane *plane, const struct intel_crtc_state *crtc_state, const struct intel_plane_state *plane_state, int color_plane); +void intel_psr_pause(struct intel_dp *intel_dp); +void intel_psr_resume(struct intel_dp *intel_dp); #endif /* __INTEL_PSR_H__ */