From patchwork Fri Mar 7 10:52:32 2025 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Hogander, Jouni" X-Patchwork-Id: 14006226 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 D628DC282DE for ; Fri, 7 Mar 2025 10:53:00 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 6D96A10EB52; Fri, 7 Mar 2025 10:53:00 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="cm/XTcUQ"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.21]) by gabe.freedesktop.org (Postfix) with ESMTPS id 526E410EB56; Fri, 7 Mar 2025 10:52:58 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1741344778; x=1772880778; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Bu1meTdequdvbrd89fvfK1Ayb0CstBKrpv/ibeqVMuY=; b=cm/XTcUQSfmbQ4ULReRkrZThlLXPqViSeKjwbB6hXc9q/f8jabntft70 sKPuvfpMRxEsvq71ZiNINF7DMvJ9mK94HapYHnklvu8dWD1sQnx5/gJvE LDlCEgLnHJ3INW3VXGVi05MJejquUQRZMXWhoJXyGBs1qVjPiZM1BLjkS 1Que224hw3ysg7OC0+KCf3tdQr3enhrD0mCz+psRNOJUAGSQrggv6ihT2 bh5BTrVpLdw3WG48bfwAZ1PuyB6LsCYPOpg+0FlpLBj3JjvojYDB01LLr BZ6DqkgZ0AoNH736CkrFi+lrBwKFV2CGCq+twewUYVWtzP++OijlJnaPI Q==; X-CSE-ConnectionGUID: MIQLtqKtR6K1TyWI39ou+g== X-CSE-MsgGUID: HuNgGvXMR9yyOhoW78YqUg== X-IronPort-AV: E=McAfee;i="6700,10204,11365"; a="42301654" X-IronPort-AV: E=Sophos;i="6.14,229,1736841600"; d="scan'208";a="42301654" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by orvoesa113.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2025 02:52:58 -0800 X-CSE-ConnectionGUID: aXX0sBuHRW6UIxlT/yBaxQ== X-CSE-MsgGUID: UoyqUC4kSFOL5bWx/5u2Ew== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.12,224,1728975600"; d="scan'208";a="123481595" Received: from mlehtone-mobl.ger.corp.intel.com (HELO jhogande-mobl1..) ([10.245.245.100]) by fmviesa003-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 07 Mar 2025 02:52:57 -0800 From: =?utf-8?q?Jouni_H=C3=B6gander?= To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: =?utf-8?q?Jouni_H=C3=B6gander?= Subject: [RFC PATCH 06/11] drm/i915/psr: Add mechanism to notify PSR of pipe enable/disable Date: Fri, 7 Mar 2025 12:52:32 +0200 Message-ID: <20250307105237.2909849-7-jouni.hogander@intel.com> X-Mailer: git-send-email 2.43.0 In-Reply-To: <20250307105237.2909849-1-jouni.hogander@intel.com> References: <20250307105237.2909849-1-jouni.hogander@intel.com> MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo 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" We need to apply/remove workaround for underrun on idle PSR HW issue (Wa_16025596647) when new pipe is enabled or pipe is getting disabled. This patch implements mechanism to notify PSR about pipe enable/disable and applies/removes the workaround using this notification. Bspec: 74151 Signed-off-by: Jouni Högander --- drivers/gpu/drm/i915/display/intel_psr.c | 106 +++++++++++++++++++++++ drivers/gpu/drm/i915/display/intel_psr.h | 2 + 2 files changed, 108 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_psr.c b/drivers/gpu/drm/i915/display/intel_psr.c index a3946eef44f0..4b62d5832cbf 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.c +++ b/drivers/gpu/drm/i915/display/intel_psr.c @@ -26,6 +26,7 @@ #include #include #include +#include #include "i915_drv.h" #include "i915_reg.h" @@ -3664,6 +3665,111 @@ void intel_psr_unlock(const struct intel_crtc_state *crtc_state) } } +/* Wa_16025596647 */ +static void psr1_apply_underrun_on_idle_wa_locked(struct intel_dp *intel_dp, + bool dc5_dc6_blocked) +{ + struct intel_display *display = to_intel_display(intel_dp); + u32 val; + + if (dc5_dc6_blocked) + val = DMC_EVT_CTL_ENABLE | DMC_EVT_CTL_RECURRING | + REG_FIELD_PREP(DMC_EVT_CTL_TYPE_MASK, + DMC_EVT_CTL_TYPE_EDGE_0_1) | + REG_FIELD_PREP(DMC_EVT_CTL_EVENT_ID_MASK, + DMC_EVT_CTL_EVENT_ID_VBLANK_A); + else + val = REG_FIELD_PREP(DMC_EVT_CTL_EVENT_ID_MASK, + DMC_EVT_CTL_EVENT_ID_FALSE) | + REG_FIELD_PREP(DMC_EVT_CTL_TYPE_MASK, + DMC_EVT_CTL_TYPE_EDGE_0_1); + + intel_de_write(display, MTL_PIPEDMC_EVT_CTL_4(intel_dp->psr.pipe), + val); +} + +/* Wa_16025596647 */ +static bool is_dc5_dc6_blocked(struct intel_dp *intel_dp) +{ + struct intel_display *display = to_intel_display(intel_dp); + u32 current_dc_state = intel_display_power_get_current_dc_state(display); + struct drm_vblank_crtc *vblank = &display->drm->vblank[intel_dp->psr.pipe]; + + return (current_dc_state != DC_STATE_EN_UPTO_DC5 && + current_dc_state != DC_STATE_EN_UPTO_DC6) || + intel_dp->psr.active_non_psr_pipes || + READ_ONCE(vblank->enabled); +} + +/* Wa_16025596647 */ +static void intel_psr_apply_underrun_on_idle_wa_locked(struct intel_dp *intel_dp) +{ + bool dc5_dc6_blocked; + + if (!intel_dp->psr.active) + return; + + dc5_dc6_blocked = is_dc5_dc6_blocked(intel_dp); + + if (intel_dp->psr.sel_update_enabled) + psr2_program_idle_frames(intel_dp, dc5_dc6_blocked ? 0 : + psr_compute_idle_frames(intel_dp)); + else + psr1_apply_underrun_on_idle_wa_locked(intel_dp, dc5_dc6_blocked); +} + +/** + * intel_psr_notify_pipe_change - Notify PSR about enable/disable of a pipe + * @state: intel atomic state + * @crtc: intel crtc + * @enable: enable/disable + * + * This is targeted for underrun on idle PSR HW bug (Wa_16025596647) to apply + * remove the workaround when pipe is getting enabled/disabled + */ +void intel_psr_notify_pipe_change(struct intel_atomic_state *state, + struct intel_crtc *crtc, bool enable) +{ + struct intel_display *display = to_intel_display(state); + struct intel_encoder *encoder; + + if (DISPLAY_VER(display) != 20 && + !IS_DISPLAY_VERx100_STEP(display, 3000, STEP_A0, STEP_B0)) + return; + + for_each_intel_encoder_with_psr(display->drm, encoder) { + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + u8 active_non_psr_pipes; + + mutex_lock(&intel_dp->psr.lock); + + if (!intel_dp->psr.enabled || intel_dp->psr.panel_replay_enabled) + goto unlock; + + active_non_psr_pipes = intel_dp->psr.active_non_psr_pipes; + + if (enable) + active_non_psr_pipes |= BIT(crtc->pipe); + else + active_non_psr_pipes &= ~BIT(crtc->pipe); + + if (active_non_psr_pipes == intel_dp->psr.active_non_psr_pipes) + goto unlock; + + if ((enable && intel_dp->psr.active_non_psr_pipes) || + (!enable && !intel_dp->psr.active_non_psr_pipes)) { + intel_dp->psr.active_non_psr_pipes = active_non_psr_pipes; + goto unlock; + } + + intel_dp->psr.active_non_psr_pipes = active_non_psr_pipes; + + intel_psr_apply_underrun_on_idle_wa_locked(intel_dp); +unlock: + mutex_unlock(&intel_dp->psr.lock); + } +} + static void psr_source_status(struct intel_dp *intel_dp, struct seq_file *m) { diff --git a/drivers/gpu/drm/i915/display/intel_psr.h b/drivers/gpu/drm/i915/display/intel_psr.h index a43a374cff55..273e70a50915 100644 --- a/drivers/gpu/drm/i915/display/intel_psr.h +++ b/drivers/gpu/drm/i915/display/intel_psr.h @@ -60,6 +60,8 @@ void intel_psr2_program_trans_man_trk_ctl(struct intel_dsb *dsb, void intel_psr_pause(struct intel_dp *intel_dp); void intel_psr_resume(struct intel_dp *intel_dp); bool intel_psr_needs_block_dc_vblank(const struct intel_crtc_state *crtc_state); +void intel_psr_notify_pipe_change(struct intel_atomic_state *state, + struct intel_crtc *crtc, bool enable); bool intel_psr_link_ok(struct intel_dp *intel_dp); void intel_psr_lock(const struct intel_crtc_state *crtc_state);