From patchwork Thu Oct 10 04:10:45 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nautiyal, Ankit K" X-Patchwork-Id: 13829464 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 07376CF07A0 for ; Thu, 10 Oct 2024 04:08:48 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9E6E210E854; Thu, 10 Oct 2024 04:08:47 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (2048-bit key; unprotected) header.d=intel.com header.i=@intel.com header.b="DXyfX2J3"; dkim-atps=neutral Received: from mgamail.intel.com (mgamail.intel.com [198.175.65.17]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5AC1A10E854; Thu, 10 Oct 2024 04:08:47 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1728533328; x=1760069328; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=SVwpd9z3PVy3AxktdlvMOgPP2cSyRHjeo+RHXGSeV0E=; b=DXyfX2J3FZF3zqMnzsd8O4Dt2djyj+kumcvkWNPS2N658DnV5mulYzcW UZub0GbYjzxQQRxDKZhCTO10z+76aOhy/3Llg2hQipd9+XrMrHZ8YQPX9 FuEJ43m96Jl4i+nHyJVp4FPp8MarNbeCRrimapBUnKdsiqwMY27HbyE3P rVO1iTWilQA+3++q/7OZCFfCtleqNApgWR/gXFF4Y6JnVHEHwdD6kn9DZ D508ixSoAC/QdmNDF/4bhjw8brvG/M1QqdiKWn2R+6vCkx32CZANT+z6D Qo/zGvND9hu/33R5ONIa/1PwMUlD7Vy4RzNc7V7MfJBBzqEwc0CE0aBa3 w==; X-CSE-ConnectionGUID: 72I+N0qITN6j/7zm0D25FA== X-CSE-MsgGUID: Bi1vJyvRSTawj+EIU+w7jw== X-IronPort-AV: E=McAfee;i="6700,10204,11220"; a="27986968" X-IronPort-AV: E=Sophos;i="6.11,191,1725346800"; d="scan'208";a="27986968" Received: from fmviesa002.fm.intel.com ([10.60.135.142]) by orvoesa109.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2024 21:08:48 -0700 X-CSE-ConnectionGUID: VCkCn3aCSEq80q86ssP9Dw== X-CSE-MsgGUID: BXZ5y8RIRL2BTNjAvq21Og== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.11,191,1725346800"; d="scan'208";a="99782674" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by fmviesa002-auth.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 09 Oct 2024 21:08:45 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org Cc: jani.nikula@linux.intel.com, uma.shankar@intel.com Subject: [PATCH 4/4] drm/i915/display: Implement Wa_14021768792 for BMG DP for link_m/n ratio > 10 Date: Thu, 10 Oct 2024 09:40:45 +0530 Message-ID: <20241010041045.2014069-5-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.45.2 In-Reply-To: <20241010041045.2014069-1-ankit.k.nautiyal@intel.com> References: <20241010041045.2014069-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 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" Handle the bypass logic for the M/N ratio limit for DP. Calculate the M/N ratio, check if it can bypass the limit, and set the appropriate flags for the workaround. Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_display.c | 1 - drivers/gpu/drm/i915/display/intel_display.h | 3 ++ drivers/gpu/drm/i915/display/intel_dp.c | 31 ++++++++++++++++++-- drivers/gpu/drm/i915/display/intel_dp.h | 5 ++++ drivers/gpu/drm/i915/display/intel_dp_mst.c | 5 +++- 5 files changed, 41 insertions(+), 4 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_display.c b/drivers/gpu/drm/i915/display/intel_display.c index 75274f567ee6..563eaee68cd4 100644 --- a/drivers/gpu/drm/i915/display/intel_display.c +++ b/drivers/gpu/drm/i915/display/intel_display.c @@ -3549,7 +3549,6 @@ void bmg_bypass_m_n_limit_read(struct intel_crtc *crtc, m_n->bypass_m_n_ratio_limit = true; } -static int bmg_can_bypass_m_n_limit(struct intel_display *display, int m_n_ratio, enum pipe pipe) diff --git a/drivers/gpu/drm/i915/display/intel_display.h b/drivers/gpu/drm/i915/display/intel_display.h index 61f6943443a7..4eb0456fde85 100644 --- a/drivers/gpu/drm/i915/display/intel_display.h +++ b/drivers/gpu/drm/i915/display/intel_display.h @@ -603,5 +603,8 @@ bool assert_port_valid(struct drm_i915_private *i915, enum port port); bool intel_scanout_needs_vtd_wa(struct drm_i915_private *i915); int intel_crtc_num_joined_pipes(const struct intel_crtc_state *crtc_state); +int bmg_can_bypass_m_n_limit(struct intel_display *display, + int m_n_ratio, + enum pipe pipe); #endif diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 45ab903a31b2..150375ff9d5d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -2890,6 +2890,27 @@ static bool can_enable_drrs(struct intel_connector *connector, intel_panel_drrs_type(connector) == DRRS_TYPE_SEAMLESS; } +bool +intel_dp_bmg_bypass_m_n_limit(struct intel_display *display, + struct intel_link_m_n *m_n, + enum pipe pipe) +{ + int m_n_ratio; + + if (!m_n->link_n) + return false; + + m_n_ratio = DIV_ROUND_UP(m_n->link_m, m_n->link_n); + + if (!bmg_can_bypass_m_n_limit(display, m_n_ratio, pipe)) + return false; + + m_n->bypass_m_n_ratio_limit = true; + drm_dbg_kms(display->drm, "Bypassing Link_m/Link_n ratio limit\n"); + + return true; +} + static int intel_dp_drrs_compute_config(struct intel_connector *connector, struct intel_crtc_state *pipe_config, @@ -2899,6 +2920,8 @@ intel_dp_drrs_compute_config(struct intel_connector *connector, struct intel_display *display = to_intel_display(connector); const struct drm_display_mode *downclock_mode = intel_panel_downclock_mode(connector, &pipe_config->hw.adjusted_mode); + struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); + enum pipe pipe = crtc->pipe; int pixel_clock; int ret; @@ -2928,7 +2951,8 @@ intel_dp_drrs_compute_config(struct intel_connector *connector, pipe_config->port_clock, intel_dp_bw_fec_overhead(pipe_config->fec_enable), &pipe_config->dp_m2_n2); - if (ret) + + if (ret && !intel_dp_bmg_bypass_m_n_limit(display, &pipe_config->dp_m2_n2, pipe)) return ret; /* FIXME: abstract this better */ @@ -3064,6 +3088,8 @@ intel_dp_compute_config(struct intel_encoder *encoder, struct intel_dp *intel_dp = enc_to_intel_dp(encoder); const struct drm_display_mode *fixed_mode; struct intel_connector *connector = intel_dp->attached_connector; + struct intel_crtc *crtc = to_intel_crtc(pipe_config->uapi.crtc); + enum pipe pipe = crtc->pipe; int ret = 0, link_bpp_x16; if (HAS_PCH_SPLIT(dev_priv) && !HAS_DDI(dev_priv) && encoder->port != PORT_A) @@ -3146,7 +3172,8 @@ intel_dp_compute_config(struct intel_encoder *encoder, pipe_config->port_clock, intel_dp_bw_fec_overhead(pipe_config->fec_enable), &pipe_config->dp_m_n); - if (ret) + + if (ret && !intel_dp_bmg_bypass_m_n_limit(display, &pipe_config->dp_m_n, pipe)) return ret; /* FIXME: abstract this better */ diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h index 60baf4072dc9..b09b088cdfc8 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.h +++ b/drivers/gpu/drm/i915/display/intel_dp.h @@ -20,8 +20,10 @@ struct intel_atomic_state; struct intel_connector; struct intel_crtc_state; struct intel_digital_port; +struct intel_display; struct intel_dp; struct intel_encoder; +struct intel_link_m_n; struct link_config_limits { int min_rate, max_rate; @@ -204,5 +206,8 @@ bool intel_dp_link_params_valid(struct intel_dp *intel_dp, int link_rate, u8 lane_count); bool intel_dp_has_connector(struct intel_dp *intel_dp, const struct drm_connector_state *conn_state); +bool intel_dp_bmg_bypass_m_n_limit(struct intel_display *display, + struct intel_link_m_n *m_n, + enum pipe pipe); #endif /* __INTEL_DP_H__ */ diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 915cf3a5cdc0..b04418a009ae 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -134,6 +134,8 @@ static int intel_dp_mst_compute_m_n(const struct intel_crtc_state *crtc_state, const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; struct intel_display *display = to_intel_display(connector); + struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc); + enum pipe pipe = crtc->pipe; int ret; /* TODO: Check WA 14013163432 to set data M/N for full BW utilization. */ @@ -141,7 +143,8 @@ static int intel_dp_mst_compute_m_n(const struct intel_crtc_state *crtc_state, adjusted_mode->crtc_clock, crtc_state->port_clock, overhead, m_n); - if (ret) + + if (ret && !intel_dp_bmg_bypass_m_n_limit(display, m_n, pipe)) return ret; m_n->tu = DIV_ROUND_UP_ULL(mul_u32_u32(m_n->data_m, 64), m_n->data_n);