From mboxrd@z Thu Jan 1 00:00:00 1970 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 9B6E0CFD376 for ; Tue, 2 Dec 2025 07:37:17 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 579EE10E599; Tue, 2 Dec 2025 07:37:17 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="B7st2pJ8"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.8]) by gabe.freedesktop.org (Postfix) with ESMTPS id DCD8510E596; Tue, 2 Dec 2025 07:37:15 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1764661036; x=1796197036; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Nj2SROglVdpOcGUGnqr1jw66eGEOGNEaLbG51YUhpPY=; b=B7st2pJ8vzNMIaMxIa/YmuuWFBea3syOTEiI3EBTuU+HK4rug+fz2CMi EaMiF8lb6RViNTuDSiaFfjkshufSMYV0A/25UUQgQNMQiZNtFGbnYSdCX x7E3Tx9BjTyClipzKGPdny635534hk5c5HRuFDMRYGHoqMVxHtEtM6hx5 5zQRCkTZGP0HDqATFCo0KJxUjQcrraFBw5yIszyEYeRcFplohnT9ECK6a 7QizkITpoC6c81X0LrRCC+V80GTj5k8E9fozDAmd0W/Yr1RbEnzinoz8T Shw7m/gBCDf+39YBTv7ySYrVkT92mJToWtZpUl1Q/ak2pAJL123db4Nts g==; X-CSE-ConnectionGUID: ghvebEP3QLehRQ4abLUDVg== X-CSE-MsgGUID: BMhz0YpcR8mx76gZSDywBw== X-IronPort-AV: E=McAfee;i="6800,10657,11630"; a="84219277" X-IronPort-AV: E=Sophos;i="6.20,242,1758610800"; d="scan'208";a="84219277" Received: from orviesa003.jf.intel.com ([10.64.159.143]) by fmvoesa102.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 01 Dec 2025 23:37:15 -0800 X-CSE-ConnectionGUID: 3ftXaDfaTJ+2yL7MTQg58Q== X-CSE-MsgGUID: cQ+WPBvnQiSrjhWPA/Dv4w== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.20,242,1758610800"; d="scan'208";a="198504886" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by orviesa003.jf.intel.com with ESMTP; 01 Dec 2025 23:37:13 -0800 From: Mitul Golani To: intel-gfx@lists.freedesktop.org Cc: intel-xe@lists.freedesktop.org, mitulkumar.ajitkumar.golani@intel.com, ankit.k.nautiyal@intel.com, ville.syrjala@linux.intel.com, uma.shankar@intel.com, jani.nikula@intel.com Subject: [PATCH v10 15/17] drm/i915/vrr: Pause DC Balancing for DSB commits Date: Tue, 2 Dec 2025 13:06:50 +0530 Message-ID: <20251202073659.926838-16-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20251202073659.926838-1-mitulkumar.ajitkumar.golani@intel.com> References: <20251202073659.926838-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit X-BeenThere: intel-xe@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Intel Xe graphics driver List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Errors-To: intel-xe-bounces@lists.freedesktop.org Sender: "Intel-xe" From: Ville Syrjälä Pause the DMC DC Balancing for the remainder of the commit so that vmin/vmax won't change after we've baked them into the DSB vblank evasion commands. --v2: - Remove typo. (Ankit) - Separate vrr enable structuring. (Ankit) --v3: - Add gaurd before accessing DC balance bits. - Remove redundancy checks. --v4: - Move events to separate function. Signed-off-by: Ville Syrjälä Signed-off-by: Mitul Golani --- drivers/gpu/drm/i915/display/intel_display.c | 19 +++++++++++++++++++ drivers/gpu/drm/i915/display/intel_vrr.c | 3 +++ 2 files changed, 22 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index f9a779c555cc..3dbad592832e 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -7321,6 +7321,21 @@ static void intel_atomic_dsb_finish(struct intel_atomic_state *state, if (new_crtc_state->use_flipq) intel_flipq_wait_dmc_halt(new_crtc_state->dsb_commit, crtc); + if (new_crtc_state->vrr.dc_balance.enable) { + /* + * Pause the DMC DC balancing for the remainder of + * the commit so that vmin/vmax won't change after + * we've baked them into the DSB vblank evasion + * commands. + * + * FIXME maybe need a small delay here to make sure + * DMC has finished updating the values? Or we need + * a better DMC<->driver protocol that gives is real + * guarantees about that... + */ + intel_pipedmc_dcb_disable(NULL, crtc); + } + if (intel_crtc_needs_color_update(new_crtc_state)) intel_color_commit_noarm(new_crtc_state->dsb_commit, new_crtc_state); @@ -7374,6 +7389,10 @@ static void intel_atomic_dsb_finish(struct intel_atomic_state *state, intel_dsb_wait_for_delayed_vblank(state, new_crtc_state->dsb_commit); intel_vrr_check_push_sent(new_crtc_state->dsb_commit, new_crtc_state); + + if (new_crtc_state->vrr.dc_balance.enable) + intel_pipedmc_dcb_enable(new_crtc_state->dsb_commit, crtc); + intel_dsb_interrupt(new_crtc_state->dsb_commit); } diff --git a/drivers/gpu/drm/i915/display/intel_vrr.c b/drivers/gpu/drm/i915/display/intel_vrr.c index 4c1470dcd3bb..38dc4f87e6fe 100644 --- a/drivers/gpu/drm/i915/display/intel_vrr.c +++ b/drivers/gpu/drm/i915/display/intel_vrr.c @@ -10,6 +10,7 @@ #include "intel_de.h" #include "intel_display_regs.h" #include "intel_display_types.h" +#include "intel_dmc.h" #include "intel_dmc_regs.h" #include "intel_dp.h" #include "intel_psr.h" @@ -824,6 +825,7 @@ intel_vrr_enable_dc_balancing(const struct intel_crtc_state *crtc_state) crtc_state->vrr.dc_balance.vblank_target); intel_de_write(display, TRANS_ADAPTIVE_SYNC_DCB_CTL(cpu_transcoder), ADAPTIVE_SYNC_COUNTER_EN); + intel_pipedmc_dcb_enable(NULL, crtc); } static void @@ -837,6 +839,7 @@ intel_vrr_disable_dc_balancing(const struct intel_crtc_state *old_crtc_state) if (!old_crtc_state->vrr.dc_balance.enable) return; + intel_pipedmc_dcb_disable(NULL, crtc); intel_de_write(display, TRANS_ADAPTIVE_SYNC_DCB_CTL(cpu_transcoder), 0); intel_de_write(display, PIPEDMC_DCB_VMIN(pipe), 0); intel_de_write(display, PIPEDMC_DCB_VMAX(pipe), 0); -- 2.48.1