From patchwork Thu Aug 17 14:24:56 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: 13356596 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 3C84BC3062E for ; Thu, 17 Aug 2023 14:31:28 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 9EC8110E4D9; Thu, 17 Aug 2023 14:31:14 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 5E8C210E4B5; Thu, 17 Aug 2023 14:30:48 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1692282648; x=1723818648; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=xwug3uJXHwNA10/dji6yCKfPKjCcDr3UpRj/8Y2cdyQ=; b=hlM8swXZcO4Z6uwhey8uHDoh28v45A0DgtId+8MOUWT2Ns/E0Aq+l45r sX0E840MZs3nLZW3LuHY7CoWBdqS0kEUxT554nD0Vc04La440ivDQboNW gaA8xH9iKs8K6cdyFpboPr9WX9bAATAobgD03cJznkYVYHqMrhkb+rBsj CIbtsKWC7DD1xIPzyDRD0vwc8mna+y/yq3M1iS7D+LNfkf1Ma/gSChXB6 ZJTC5XXJfleRZpy+j1TnWEepnq+57k3qYHdRCz3xqUiJAH54b6/RSvTZt yyHbjx24m3vW+dupJ/WgtWnrA1rJhHIrqLIwlqWRr4Fl4Ao1x8Wq/UUnR g==; X-IronPort-AV: E=McAfee;i="6600,9927,10805"; a="376581756" X-IronPort-AV: E=Sophos;i="6.01,180,1684825200"; d="scan'208";a="376581756" Received: from orsmga004.jf.intel.com ([10.7.209.38]) by orsmga103.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2023 07:28:55 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10805"; a="858244138" X-IronPort-AV: E=Sophos;i="6.01,180,1684825200"; d="scan'208";a="858244138" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by orsmga004-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 17 Aug 2023 07:28:53 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Date: Thu, 17 Aug 2023 19:54:56 +0530 Message-Id: <20230817142459.89764-16-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230817142459.89764-1-ankit.k.nautiyal@intel.com> References: <20230817142459.89764-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 15/18] drm/i915/dp: Separate out function to get compressed bpp with joiner 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" Pull the code to get joiner constraints on maximum compressed bpp into separate function. Signed-off-by: Ankit Nautiyal Reviewed-by: Stanislav Lisovskiy --- drivers/gpu/drm/i915/display/intel_dp.c | 54 ++++++++++++++----------- 1 file changed, 30 insertions(+), 24 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index 109d7756ede4..3ccdf765c1f0 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -740,6 +740,32 @@ u32 intel_dp_dsc_nearest_valid_bpp(struct drm_i915_private *i915, u32 bpp, u32 p return bits_per_pixel; } +static +u32 get_max_compressed_bpp_with_joiner(struct drm_i915_private *i915, + u32 mode_clock, u32 mode_hdisplay, + bool bigjoiner) +{ + u32 max_bpp_small_joiner_ram; + + /* Small Joiner Check: output bpp <= joiner RAM (bits) / Horiz. width */ + max_bpp_small_joiner_ram = small_joiner_ram_size_bits(i915) / mode_hdisplay; + + if (bigjoiner) { + int bigjoiner_interface_bits = DISPLAY_VER(i915) >= 14 ? 36 : 24; + /* With bigjoiner multiple dsc engines are used in parallel so PPC is 2 */ + int ppc = 2; + u32 max_bpp_bigjoiner = + i915->display.cdclk.max_cdclk_freq * ppc * bigjoiner_interface_bits / + intel_dp_mode_to_fec_clock(mode_clock); + + max_bpp_small_joiner_ram *= 2; + + return min(max_bpp_small_joiner_ram, max_bpp_bigjoiner); + } + + return max_bpp_small_joiner_ram; +} + u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915, u32 link_clock, u32 lane_count, u32 mode_clock, u32 mode_hdisplay, @@ -748,7 +774,7 @@ u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915, u32 pipe_bpp, u32 timeslots) { - u32 bits_per_pixel, max_bpp_small_joiner_ram; + u32 bits_per_pixel, joiner_max_bpp; /* * Available Link Bandwidth(Kbits/sec) = (NumberOfLanes)* @@ -788,29 +814,9 @@ u16 intel_dp_dsc_get_max_compressed_bpp(struct drm_i915_private *i915, (link_clock * lane_count * 8), intel_dp_mode_to_fec_clock(mode_clock)); - /* Small Joiner Check: output bpp <= joiner RAM (bits) / Horiz. width */ - max_bpp_small_joiner_ram = small_joiner_ram_size_bits(i915) / - mode_hdisplay; - - if (bigjoiner) - max_bpp_small_joiner_ram *= 2; - - /* - * Greatest allowed DSC BPP = MIN (output BPP from available Link BW - * check, output bpp from small joiner RAM check) - */ - bits_per_pixel = min(bits_per_pixel, max_bpp_small_joiner_ram); - - if (bigjoiner) { - int bigjoiner_interface_bits = DISPLAY_VER(i915) >= 14 ? 36 : 24; - /* With bigjoiner multiple dsc engines are used in parallel so PPC is 2 */ - int ppc = 2; - u32 max_bpp_bigjoiner = - i915->display.cdclk.max_cdclk_freq * ppc * bigjoiner_interface_bits / - intel_dp_mode_to_fec_clock(mode_clock); - - bits_per_pixel = min(bits_per_pixel, max_bpp_bigjoiner); - } + joiner_max_bpp = get_max_compressed_bpp_with_joiner(i915, mode_clock, + mode_hdisplay, bigjoiner); + bits_per_pixel = min(bits_per_pixel, joiner_max_bpp); bits_per_pixel = intel_dp_dsc_nearest_valid_bpp(i915, bits_per_pixel, pipe_bpp);