From patchwork Wed Dec 2 14:24:05 2020 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Ankit Nautiyal X-Patchwork-Id: 11946301 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.7 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=unavailable autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 378E1C64E8A for ; Wed, 2 Dec 2020 14:31:50 +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 D46DF21D42 for ; Wed, 2 Dec 2020 14:31:49 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D46DF21D42 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 82FFE6EA6D; Wed, 2 Dec 2020 14:31:41 +0000 (UTC) Received: from mga05.intel.com (mga05.intel.com [192.55.52.43]) by gabe.freedesktop.org (Postfix) with ESMTPS id 195526EA55; Wed, 2 Dec 2020 14:31:38 +0000 (UTC) IronPort-SDR: auJ/2VK4cuwYRcE1PeiDqJOd65f2Z2ewCQF/0Ze2x2wEWqO6l1RwKs1LkCqsWTEfdKFawxefXQ RVmMmRNNA3lA== X-IronPort-AV: E=McAfee;i="6000,8403,9822"; a="257733919" X-IronPort-AV: E=Sophos;i="5.78,386,1599548400"; d="scan'208";a="257733919" X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga007.jf.intel.com ([10.7.209.58]) by fmsmga105.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 02 Dec 2020 06:31:17 -0800 IronPort-SDR: 5SFiBf85iGL7hmWwiM018qmp3SmOpdFcJhYUN71wEaJQI+KIpK4pDgAiMm0Akn3Jy2drwLEFVK VWcVrC6VJMyQ== X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.78,386,1599548400"; d="scan'208";a="373191714" Received: from linux-akn.iind.intel.com ([10.223.34.148]) by orsmga007.jf.intel.com with ESMTP; 02 Dec 2020 06:31:09 -0800 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Date: Wed, 2 Dec 2020 19:54:05 +0530 Message-Id: <20201202142405.14951-14-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20201202142405.14951-1-ankit.k.nautiyal@intel.com> References: <20201202142405.14951-1-ankit.k.nautiyal@intel.com> Subject: [Intel-gfx] [PATCH v3 13/13] drm/i915/display: Configure PCON for DSC1.1 to DSC1.2 encoding 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: airlied@linux.ie, dri-devel@lists.freedesktop.org MIME-Version: 1.0 Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" When a source supporting DSC1.1 is connected to DSC1.2 HDMI2.1 sink via DP HDMI2.1 PCON, the PCON can be configured to decode the DSC1.1 compressed stream and encode to DSC1.2. It then sends the DSC1.2 compressed stream to the HDMI2.1 sink. This patch configures the PCON for DSC1.1 to DSC1.2 encoding, based on the PCON's DSC encoder capablities and HDMI2.1 sink's DSC decoder capabilities. v2: Addressed review comments from Uma Shankar: -fixed the error in packing pps parameter values -added check for pcon in the pcon related function -appended display in commit message Signed-off-by: Ankit Nautiyal --- drivers/gpu/drm/i915/display/intel_ddi.c | 1 + drivers/gpu/drm/i915/display/intel_dp.c | 117 ++++++++++++++++++++++- drivers/gpu/drm/i915/display/intel_dp.h | 2 + 3 files changed, 118 insertions(+), 2 deletions(-) diff --git a/drivers/gpu/drm/i915/display/intel_ddi.c b/drivers/gpu/drm/i915/display/intel_ddi.c index 1c2fdaa4f81a..c2bc18ee5641 100644 --- a/drivers/gpu/drm/i915/display/intel_ddi.c +++ b/drivers/gpu/drm/i915/display/intel_ddi.c @@ -3652,6 +3652,7 @@ static void tgl_ddi_pre_enable_dp(struct intel_atomic_state *state, intel_dp_sink_set_fec_ready(intel_dp, crtc_state); intel_dp_check_frl_training(intel_dp, crtc_state); + intel_dp_pcon_dsc_configure(intel_dp, crtc_state); /* * 7.i Follow DisplayPort specification training sequence (see notes for diff --git a/drivers/gpu/drm/i915/display/intel_dp.c b/drivers/gpu/drm/i915/display/intel_dp.c index e3da73499e5a..87a335084056 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.c +++ b/drivers/gpu/drm/i915/display/intel_dp.c @@ -4035,9 +4035,21 @@ static int intel_dp_hdmi_sink_max_frl(struct intel_dp *intel_dp) { struct intel_connector *intel_connector = intel_dp->attached_connector; struct drm_connector *connector = &intel_connector->base; + int max_frl_rate; + int max_lanes, rate_per_lane; + int max_dsc_lanes, dsc_rate_per_lane; - return (connector->display_info.hdmi.max_frl_rate_per_lane * - connector->display_info.hdmi.max_lanes); + max_lanes = connector->display_info.hdmi.max_lanes; + rate_per_lane = connector->display_info.hdmi.max_frl_rate_per_lane; + max_frl_rate = max_lanes * rate_per_lane; + + if (connector->display_info.hdmi.dsc_cap.v_1p2) { + max_dsc_lanes = connector->display_info.hdmi.dsc_cap.max_lanes; + dsc_rate_per_lane = connector->display_info.hdmi.dsc_cap.max_frl_rate_per_lane; + max_frl_rate = min(max_frl_rate, max_dsc_lanes * dsc_rate_per_lane); + } + + return max_frl_rate; } static int intel_dp_pcon_start_frl_training(struct intel_dp *intel_dp) @@ -4167,6 +4179,105 @@ void intel_dp_check_frl_training(struct intel_dp *intel_dp, } } +static int +intel_dp_pcon_dsc_enc_slice_height(const struct intel_crtc_state *crtc_state) +{ + + int vactive = crtc_state->hw.adjusted_mode.vdisplay; + + return intel_hdmi_dsc_get_slice_height(vactive); +} + +static int +intel_dp_pcon_dsc_enc_slices(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state) +{ + struct intel_connector *intel_connector = intel_dp->attached_connector; + struct drm_connector *connector = &intel_connector->base; + int hdmi_throughput = connector->display_info.hdmi.dsc_cap.clk_per_slice; + int hdmi_max_slices = connector->display_info.hdmi.dsc_cap.max_slices; + int pcon_max_slices = drm_dp_pcon_dsc_max_slices(intel_dp->pcon_dsc_dpcd); + int pcon_max_slice_width = drm_dp_pcon_dsc_max_slice_width(intel_dp->pcon_dsc_dpcd); + + + return intel_hdmi_dsc_get_num_slices(crtc_state, pcon_max_slices, + pcon_max_slice_width, + hdmi_max_slices, hdmi_throughput); +} + +static int +intel_dp_pcon_dsc_enc_bpp(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state, + int num_slices, int slice_width) +{ + struct intel_connector *intel_connector = intel_dp->attached_connector; + struct drm_connector *connector = &intel_connector->base; + int output_format = crtc_state->output_format; + bool hdmi_all_bpp = connector->display_info.hdmi.dsc_cap.all_bpp; + int pcon_fractional_bpp = drm_dp_pcon_dsc_bpp_incr(intel_dp->pcon_dsc_dpcd); + int hdmi_max_chunk_bytes = + connector->display_info.hdmi.dsc_cap.total_chunk_kbytes * 1024; + + return intel_hdmi_dsc_get_bpp(pcon_fractional_bpp, slice_width, + num_slices, output_format, hdmi_all_bpp, + hdmi_max_chunk_bytes); +} + +void +intel_dp_pcon_dsc_configure(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state) +{ + u8 pps_param[6]; + int slice_height; + int slice_width; + int num_slices; + int bits_per_pixel; + int ret; + struct intel_connector *intel_connector = intel_dp->attached_connector; + struct drm_i915_private *i915 = dp_to_i915(intel_dp); + struct drm_connector *connector; + bool hdmi_is_dsc_1_2; + + if (!intel_dp_is_hdmi_2_1_sink(intel_dp)) + return; + + if (!intel_connector) + return; + connector = &intel_connector->base; + hdmi_is_dsc_1_2 = connector->display_info.hdmi.dsc_cap.v_1p2; + + if (!drm_dp_pcon_enc_is_dsc_1_2(intel_dp->pcon_dsc_dpcd) || + !hdmi_is_dsc_1_2) + return; + + slice_height = intel_dp_pcon_dsc_enc_slice_height(crtc_state); + if (!slice_height) + return; + + num_slices = intel_dp_pcon_dsc_enc_slices(intel_dp, crtc_state); + if (!num_slices) + return; + + slice_width = DIV_ROUND_UP(crtc_state->hw.adjusted_mode.hdisplay, + num_slices); + + bits_per_pixel = intel_dp_pcon_dsc_enc_bpp(intel_dp, crtc_state, + num_slices, slice_width); + if (!bits_per_pixel) + return; + + pps_param[0] = slice_height & 0xFF; + pps_param[1] = slice_height >> 8; + pps_param[2] = slice_width & 0xFF; + pps_param[3] = slice_width >> 8; + pps_param[4] = bits_per_pixel & 0xFF; + pps_param[5] = (bits_per_pixel >> 8) & 0x3; + + ret = drm_dp_pcon_pps_override_param(&intel_dp->aux, pps_param); + if (ret < 0) + drm_dbg_kms(&i915->drm, "Failed to set pcon DSC\n"); +} + static void g4x_set_link_train(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state, @@ -4298,6 +4409,7 @@ static void intel_enable_dp(struct intel_atomic_state *state, intel_dp_set_power(intel_dp, DP_SET_POWER_D0); intel_dp_configure_protocol_converter(intel_dp); intel_dp_check_frl_training(intel_dp, pipe_config); + intel_dp_pcon_dsc_configure(intel_dp, pipe_config); intel_dp_start_link_train(intel_dp, pipe_config); intel_dp_stop_link_train(intel_dp, pipe_config); @@ -6257,6 +6369,7 @@ int intel_dp_retrain_link(struct intel_encoder *encoder, continue; intel_dp_check_frl_training(intel_dp, crtc_state); + intel_dp_pcon_dsc_configure(intel_dp, crtc_state); intel_dp_start_link_train(intel_dp, crtc_state); intel_dp_stop_link_train(intel_dp, crtc_state); break; diff --git a/drivers/gpu/drm/i915/display/intel_dp.h b/drivers/gpu/drm/i915/display/intel_dp.h index b4a14646caea..9bba920b8197 100644 --- a/drivers/gpu/drm/i915/display/intel_dp.h +++ b/drivers/gpu/drm/i915/display/intel_dp.h @@ -146,5 +146,7 @@ void intel_dp_sync_state(struct intel_encoder *encoder, void intel_dp_check_frl_training(struct intel_dp *intel_dp, const struct intel_crtc_state *crtc_state); +void intel_dp_pcon_dsc_configure(struct intel_dp *intel_dp, + const struct intel_crtc_state *crtc_state); #endif /* __INTEL_DP_H__ */