From patchwork Fri Nov 10 10:10:18 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Nautiyal, Ankit K" X-Patchwork-Id: 13452319 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 8440AC04A95 for ; Fri, 10 Nov 2023 10:16:52 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id F0A4B10E97D; Fri, 10 Nov 2023 10:16:41 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.198.163.7]) by gabe.freedesktop.org (Postfix) with ESMTPS id 6446510E972; Fri, 10 Nov 2023 10:16:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1699611397; x=1731147397; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=gEH0AV6kljhYvSsRTWcBdT+k+ODd+qd5D7Ax/4KA4Ww=; b=GZM/9BY/Xxi6skO+BCVTVRmaf9h9qYAR7rfSPdutf+YM6FSAKFzkfD7G 53t5110XKKmDU4RUyVJ8L+VadK0n3GeTirxqDZampSzAUKa3pFa6A1Zwj hyHr0RGJWeTk3RZNTR18fap0yxvxHSZbmlpWHReHpgdHuBHszOpKk27AS gFGAv4TlgcEakIfNhUATyOJSUd4k+LSTgEJNzzzwlhAG/OfyTvBJjj8PR LPBnYvO3rfn9sSySCDWrIwzsxXEcWmpoNoqc7Cp9p7DFldTKb2svmkD/w 7RjgCsok2SlvPDChwFRp0xVmgvD75PpdgF0z09RvSSpYJZ976ccH6p9tT g==; X-IronPort-AV: E=McAfee;i="6600,9927,10889"; a="11712831" X-IronPort-AV: E=Sophos;i="6.03,291,1694761200"; d="scan'208";a="11712831" Received: from orviesa002.jf.intel.com ([10.64.159.142]) by fmvoesa101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Nov 2023 02:16:37 -0800 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="6.03,291,1694761200"; d="scan'208";a="4816431" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by orviesa002-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 10 Nov 2023 02:16:35 -0800 From: Ankit Nautiyal To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Date: Fri, 10 Nov 2023 15:40:18 +0530 Message-Id: <20231110101020.4067342-10-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20231110101020.4067342-1-ankit.k.nautiyal@intel.com> References: <20231110101020.4067342-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 09/11] drm/i915/dp_mst: Use precision of 1/16 for computing bpp 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: , Cc: suijingfeng@loongson.cn Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Modify the functions to deal with bpps with 1/16 precision. This will make way for cases when DSC with fractional bpp is used. For bpp without DSC, there is no change, as we still use whole numbers. Signed-off-by: Ankit Nautiyal Reviewed-by: Suraj Kandpal --- drivers/gpu/drm/i915/display/intel_dp_mst.c | 56 +++++++++++---------- 1 file changed, 30 insertions(+), 26 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp_mst.c b/drivers/gpu/drm/i915/display/intel_dp_mst.c index 5c7e9d296483..e7806fe11b9d 100644 --- a/drivers/gpu/drm/i915/display/intel_dp_mst.c +++ b/drivers/gpu/drm/i915/display/intel_dp_mst.c @@ -47,20 +47,21 @@ #include "intel_vdsc.h" #include "skl_scaler.h" -static int intel_dp_mst_check_constraints(struct drm_i915_private *i915, int bpp, +static int intel_dp_mst_check_constraints(struct drm_i915_private *i915, int bpp_x16, const struct drm_display_mode *adjusted_mode, struct intel_crtc_state *crtc_state, bool dsc) { if (intel_dp_is_uhbr(crtc_state) && DISPLAY_VER(i915) <= 13 && dsc) { - int output_bpp = bpp; + int output_bpp_x16 = bpp_x16; /* DisplayPort 2 128b/132b, bits per lane is always 32 */ int symbol_clock = crtc_state->port_clock / 32; - if (output_bpp * adjusted_mode->crtc_clock >= + if (DIV_ROUND_UP(output_bpp_x16 * adjusted_mode->crtc_clock, 16) >= symbol_clock * 72) { drm_dbg_kms(&i915->drm, "UHBR check failed(required bw %d available %d)\n", - output_bpp * adjusted_mode->crtc_clock, symbol_clock * 72); + DIV_ROUND_UP(output_bpp_x16 * adjusted_mode->crtc_clock, 16), + symbol_clock * 72); return -EINVAL; } } @@ -127,8 +128,8 @@ static void intel_dp_mst_compute_m_n(const struct intel_crtc_state *crtc_state, static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, struct intel_crtc_state *crtc_state, - int max_bpp, - int min_bpp, + int max_bpp_x16, + int min_bpp_x16, struct link_config_limits *limits, struct drm_connector_state *conn_state, int step, @@ -143,7 +144,7 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, struct drm_i915_private *i915 = to_i915(connector->base.dev); const struct drm_display_mode *adjusted_mode = &crtc_state->hw.adjusted_mode; - int bpp, slots = -EINVAL; + int bpp_x16, slots = -EINVAL; int ret = 0; mst_state = drm_atomic_get_mst_topology_state(state, &intel_dp->mst_mgr); @@ -164,25 +165,25 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, crtc_state->port_clock, crtc_state->lane_count); - drm_dbg_kms(&i915->drm, "Looking for slots in range min bpp %d max bpp %d\n", - min_bpp, max_bpp); + drm_dbg_kms(&i915->drm, "Looking for slots in range min bpp " BPP_X16_FMT " max bpp " BPP_X16_FMT "\n", + BPP_X16_ARGS(min_bpp_x16), BPP_X16_ARGS(max_bpp_x16)); - for (bpp = max_bpp; bpp >= min_bpp; bpp -= step) { + for (bpp_x16 = max_bpp_x16; bpp_x16 >= min_bpp_x16; bpp_x16 -= step) { struct intel_link_m_n remote_m_n; - int link_bpp; + int link_bpp_x16; - drm_dbg_kms(&i915->drm, "Trying bpp %d\n", bpp); + drm_dbg_kms(&i915->drm, "Trying bpp " BPP_X16_FMT "\n", BPP_X16_ARGS(bpp_x16)); - ret = intel_dp_mst_check_constraints(i915, bpp, adjusted_mode, crtc_state, dsc); + ret = intel_dp_mst_check_constraints(i915, bpp_x16, adjusted_mode, crtc_state, dsc); if (ret) continue; - link_bpp = dsc ? bpp : - intel_dp_output_bpp(crtc_state->output_format, bpp); + link_bpp_x16 = dsc ? bpp_x16 : + intel_dp_output_bpp(crtc_state->output_format, to_bpp_int(bpp_x16)); - intel_dp_mst_compute_m_n(crtc_state, connector, false, dsc, to_bpp_x16(link_bpp), + intel_dp_mst_compute_m_n(crtc_state, connector, false, dsc, link_bpp_x16, &crtc_state->dp_m_n); - intel_dp_mst_compute_m_n(crtc_state, connector, true, dsc, to_bpp_x16(link_bpp), + intel_dp_mst_compute_m_n(crtc_state, connector, true, dsc, link_bpp_x16, &remote_m_n); /* @@ -225,10 +226,11 @@ static int intel_dp_mst_find_vcpi_slots_for_bpp(struct intel_encoder *encoder, slots); } else { if (!dsc) - crtc_state->pipe_bpp = bpp; + crtc_state->pipe_bpp = to_bpp_int(bpp_x16); else - crtc_state->dsc.compressed_bpp_x16 = to_bpp_x16(bpp); - drm_dbg_kms(&i915->drm, "Got %d slots for pipe bpp %d dsc %d\n", slots, bpp, dsc); + crtc_state->dsc.compressed_bpp_x16 = bpp_x16; + drm_dbg_kms(&i915->drm, "Got %d slots for pipe bpp " BPP_X16_FMT " dsc %d\n", + slots, BPP_X16_ARGS(bpp_x16), dsc); } return slots; @@ -246,10 +248,10 @@ static int intel_dp_mst_compute_link_config(struct intel_encoder *encoder, * YUV420 is only half of the pipe bpp value. */ slots = intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state, - to_bpp_int(limits->link.max_bpp_x16), - to_bpp_int(limits->link.min_bpp_x16), + limits->link.max_bpp_x16, + limits->link.min_bpp_x16, limits, - conn_state, 2 * 3, false); + conn_state, 2 * 3 * 16, false); if (slots < 0) return slots; @@ -325,9 +327,11 @@ static int intel_dp_dsc_mst_compute_link_config(struct intel_encoder *encoder, min_compressed_bpp = intel_dp_dsc_nearest_valid_bpp(i915, min_compressed_bpp, crtc_state->pipe_bpp); - slots = intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state, max_compressed_bpp, - min_compressed_bpp, limits, - conn_state, 1, true); + slots = intel_dp_mst_find_vcpi_slots_for_bpp(encoder, crtc_state, + to_bpp_x16(max_compressed_bpp), + to_bpp_x16(min_compressed_bpp), + limits, + conn_state, 16, true); if (slots < 0) return slots;