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 9A22CCFD2F6 for ; Thu, 27 Nov 2025 09:16:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5839910E7DC; Thu, 27 Nov 2025 09:16:41 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="LZeeWBIN"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.10]) by gabe.freedesktop.org (Postfix) with ESMTPS id 67C8A10E7D1; Thu, 27 Nov 2025 09:16:18 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1764234977; x=1795770977; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=Zh4ZHkEc6sdrw/a5UBxqgXZNpZti9vSGXDYMQ1TdA8Y=; b=LZeeWBINDBYq3Q+1Nsf+Ifq08w6ydPqypn5peq1tdrFUmg/hBv79NKST MgnvRgwKr+WyTiiiqk4XlA7lVdvFFsbPbgwbW1znPzMHDWdrqGeCUKvAS 5++VbmkQ+7jOFbSq+pteagaRqKlRKgl4iIRWGwAawO/k0pSaBI+vqCLrr 660MBlUHyb8llPjgLys0fTDgptQtG8Ou1+d4on2QzQrdqzbun8qw3vCSv ckE2EBGwsQ7nAuTzXwxp3P1ixjLRC5f7evhkmFGB/laJMe5cptpGeoU+z jUSReaFis5r9ciov3aMuIxRTpxBIoIjVfAyqrCfgxVxb7u09OUQZOqSs3 w==; X-CSE-ConnectionGUID: EJoAptOSROSG/FJeYwtOWw== X-CSE-MsgGUID: n0eGyKKsS5yFQfNJFVMJnA== X-IronPort-AV: E=McAfee;i="6800,10657,11625"; a="77642351" X-IronPort-AV: E=Sophos;i="6.20,230,1758610800"; d="scan'208";a="77642351" Received: from fmviesa003.fm.intel.com ([10.60.135.143]) by fmvoesa104.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 27 Nov 2025 01:16:17 -0800 X-CSE-ConnectionGUID: ZAJ79ljFQLGBwTZDeLxWIA== X-CSE-MsgGUID: 3NdPaCI6QNefoCY3L3MVAw== X-ExtLoop1: 1 Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmviesa003.fm.intel.com with ESMTP; 27 Nov 2025 01:16:16 -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 Subject: [PATCH v9 12/17] drm/i915/vrr: Implement vblank evasion with DC balancing Date: Thu, 27 Nov 2025 14:46:09 +0530 Message-ID: <20251127091614.648791-13-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.48.1 In-Reply-To: <20251127091614.648791-1-mitulkumar.ajitkumar.golani@intel.com> References: <20251127091614.648791-1-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 Add vblank evasion logic when vrr is already enabled along with dc balance is computed. Signed-off-by: Ville Syrjälä Signed-off-by: Mitul Golani Reviewed-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_dsb.c | 31 ++++++++++++++++++++- drivers/gpu/drm/i915/display/intel_vblank.c | 26 +++++++++++++++-- 2 files changed, 53 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dsb.c b/drivers/gpu/drm/i915/display/intel_dsb.c index 4ad4efbf9253..83130bb74aa9 100644 --- a/drivers/gpu/drm/i915/display/intel_dsb.c +++ b/drivers/gpu/drm/i915/display/intel_dsb.c @@ -704,7 +704,36 @@ void intel_dsb_vblank_evade(struct intel_atomic_state *state, if (crtc_state->has_psr) intel_dsb_emit_wait_dsl(dsb, DSB_OPCODE_WAIT_DSL_OUT, 0, 0); - if (pre_commit_is_vrr_active(state, crtc)) { + if (pre_commit_is_vrr_active(state, crtc) && crtc_state->vrr.dc_balance.enable) { + int vblank_delay = crtc_state->set_context_latency; + int vmin_vblank_start, vmax_vblank_start; + + vmin_vblank_start = intel_vrr_dcb_vmin_vblank_start_next(crtc_state); + + if (vmin_vblank_start >= 0) { + end = vmin_vblank_start; + start = end - vblank_delay - latency; + intel_dsb_wait_scanline_out(state, dsb, start, end); + } + + vmax_vblank_start = intel_vrr_dcb_vmax_vblank_start_next(crtc_state); + + if (vmax_vblank_start >= 0) { + end = vmax_vblank_start; + start = end - vblank_delay - latency; + intel_dsb_wait_scanline_out(state, dsb, start, end); + } + + vmin_vblank_start = intel_vrr_dcb_vmin_vblank_start_final(crtc_state); + end = vmin_vblank_start; + start = end - vblank_delay - latency; + intel_dsb_wait_scanline_out(state, dsb, start, end); + + vmax_vblank_start = intel_vrr_dcb_vmax_vblank_start_final(crtc_state); + end = vmax_vblank_start; + start = end - vblank_delay - latency; + intel_dsb_wait_scanline_out(state, dsb, start, end); + } else if (pre_commit_is_vrr_active(state, crtc)) { int vblank_delay = crtc_state->set_context_latency; end = intel_vrr_vmin_vblank_start(crtc_state); diff --git a/drivers/gpu/drm/i915/display/intel_vblank.c b/drivers/gpu/drm/i915/display/intel_vblank.c index de20baeb9d99..df5879489963 100644 --- a/drivers/gpu/drm/i915/display/intel_vblank.c +++ b/drivers/gpu/drm/i915/display/intel_vblank.c @@ -654,10 +654,30 @@ intel_pre_commit_crtc_state(struct intel_atomic_state *state, static int vrr_vblank_start(const struct intel_crtc_state *crtc_state) { - if (intel_vrr_is_push_sent(crtc_state)) - return intel_vrr_vmin_vblank_start(crtc_state); + bool is_push_sent = intel_vrr_is_push_sent(crtc_state); + int vblank_start; + + if (!crtc_state->vrr.dc_balance.enable) { + if (is_push_sent) + return intel_vrr_vmin_vblank_start(crtc_state); + else + return intel_vrr_vmax_vblank_start(crtc_state); + } + + if (is_push_sent) + vblank_start = intel_vrr_dcb_vmin_vblank_start_next(crtc_state); else - return intel_vrr_vmax_vblank_start(crtc_state); + vblank_start = intel_vrr_dcb_vmax_vblank_start_next(crtc_state); + + if (vblank_start >= 0) + return vblank_start; + + if (is_push_sent) + vblank_start = intel_vrr_dcb_vmin_vblank_start_final(crtc_state); + else + vblank_start = intel_vrr_dcb_vmax_vblank_start_final(crtc_state); + + return vblank_start; } void intel_vblank_evade_init(const struct intel_crtc_state *old_crtc_state, -- 2.48.1