From patchwork Tue Nov 26 13:42:47 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 11262429 Return-Path: Received: from mail.kernel.org (pdx-korg-mail-1.web.codeaurora.org [172.30.200.123]) by pdx-korg-patchwork-2.web.codeaurora.org (Postfix) with ESMTP id 4F6E113A4 for ; Tue, 26 Nov 2019 13:44:00 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id 38DCD206BF for ; Tue, 26 Nov 2019 13:44:00 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 38DCD206BF Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A65326E3D8; Tue, 26 Nov 2019 13:43:59 +0000 (UTC) X-Original-To: intel-gfx@lists.freedesktop.org Delivered-To: intel-gfx@lists.freedesktop.org Received: from mga02.intel.com (mga02.intel.com [134.134.136.20]) by gabe.freedesktop.org (Postfix) with ESMTPS id 4E8506E3D8 for ; Tue, 26 Nov 2019 13:43:58 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from fmsmga004.fm.intel.com ([10.253.24.48]) by orsmga101.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Nov 2019 05:43:57 -0800 X-IronPort-AV: E=Sophos;i="5.69,245,1571727600"; d="scan'208";a="233750178" Received: from jnikula-mobl3.fi.intel.com (HELO localhost) ([10.237.66.161]) by fmsmga004-auth.fm.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 26 Nov 2019 05:43:55 -0800 From: Jani Nikula To: intel-gfx@lists.freedesktop.org Date: Tue, 26 Nov 2019 15:42:47 +0200 Message-Id: <60989a3cf3d5c449356f5d827caf0ab5bfe3b528.1574775655.git.jani.nikula@intel.com> X-Mailer: git-send-email 2.20.1 In-Reply-To: References: MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo Subject: [Intel-gfx] [PATCH v3 12/13] drm/i915/dsi: account for DSC in horizontal timings X-BeenThere: intel-gfx@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Intel graphics driver community testing & development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: jani.nikula@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" When DSC is enabled, we need to adjust the horizontal timings to account for the compressed (and therefore reduced) link speed. The compressed frequency ratio simplifies down to the ratio between compressed and non-compressed bpp. Bspec: 49263 Suggested-by: Vandita Kulkarni Cc: Vandita Kulkarni Cc: Ville Syrjälä Signed-off-by: Jani Nikula Reviewed-by: Vandita Kulkarni --- drivers/gpu/drm/i915/display/icl_dsi.c | 24 +++++++++++++++++++----- 1 file changed, 19 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/i915/display/icl_dsi.c b/drivers/gpu/drm/i915/display/icl_dsi.c index 460759913708..caa477c4b1af 100644 --- a/drivers/gpu/drm/i915/display/icl_dsi.c +++ b/drivers/gpu/drm/i915/display/icl_dsi.c @@ -785,12 +785,12 @@ gen11_dsi_configure_transcoder(struct intel_encoder *encoder, static void gen11_dsi_set_transcoder_timings(struct intel_encoder *encoder, - const struct intel_crtc_state *pipe_config) + const struct intel_crtc_state *crtc_state) { struct drm_i915_private *dev_priv = to_i915(encoder->base.dev); struct intel_dsi *intel_dsi = enc_to_intel_dsi(&encoder->base); const struct drm_display_mode *adjusted_mode = - &pipe_config->hw.adjusted_mode; + &crtc_state->hw.adjusted_mode; enum port port; enum transcoder dsi_trans; /* horizontal timings */ @@ -798,11 +798,25 @@ gen11_dsi_set_transcoder_timings(struct intel_encoder *encoder, u16 hback_porch; /* vertical timings */ u16 vtotal, vactive, vsync_start, vsync_end, vsync_shift; + int mul = 1, div = 1; + + /* + * Adjust horizontal timings (htotal, hsync_start, hsync_end) to account + * for slower link speed if DSC is enabled. + * + * The compression frequency ratio is the ratio between compressed and + * non-compressed link speeds, and simplifies down to the ratio between + * compressed and non-compressed bpp. + */ + if (crtc_state->dsc.compression_enable) { + mul = crtc_state->dsc.compressed_bpp; + div = mipi_dsi_pixel_format_to_bpp(intel_dsi->pixel_format); + } hactive = adjusted_mode->crtc_hdisplay; - htotal = adjusted_mode->crtc_htotal; - hsync_start = adjusted_mode->crtc_hsync_start; - hsync_end = adjusted_mode->crtc_hsync_end; + htotal = DIV_ROUND_UP(adjusted_mode->crtc_htotal * mul, div); + hsync_start = DIV_ROUND_UP(adjusted_mode->crtc_hsync_start * mul, div); + hsync_end = DIV_ROUND_UP(adjusted_mode->crtc_hsync_end * mul, div); hsync_size = hsync_end - hsync_start; hback_porch = (adjusted_mode->crtc_htotal - adjusted_mode->crtc_hsync_end);