From patchwork Tue Aug 22 12:10:32 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: 13360572 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 93E62EE49A3 for ; Tue, 22 Aug 2023 12:14:03 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 312FD10E347; Tue, 22 Aug 2023 12:14:03 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id D769B10E345 for ; Tue, 22 Aug 2023 12:14:00 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1692706440; x=1724242440; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=syrO/Wh7lS8ztrDMGI35D3bc1qrrZJInCtN1+brGDh4=; b=eMPEivWQJXeglnGL2xnK4uMl8BUWy9tx7x3pKeAsfgQo0mut1N7oB/lv 6uBoI7orRgeRVibRlyxbfRj7PcuzGHCggAnC683uzUjqr6RTdKSqIl3L7 5hQBP5ZgMwtXncDjBkpxhv587Qj0Y1I7QtC0q9iX6KtZcz+kW0ur0vrad F8BDs1vYCmGDKwF46RLk3b19oGJfpQi7fyoaeXQ7ka/ZSPKGxQuv66adu VZLp4YF7l6IVJ1zwp5h+N9V2C+JD3Cu/pwXP5JJLzZw5Z3QBvAHAdwYRs AaJeW7QcAAneQ+3rekhEmdTJGoD6piIQXZyJt2qVpZLvtlNeFND18ZDe8 Q==; X-IronPort-AV: E=McAfee;i="6600,9927,10809"; a="440230331" X-IronPort-AV: E=Sophos;i="6.01,193,1684825200"; d="scan'208";a="440230331" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Aug 2023 05:14:00 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10809"; a="771335306" X-IronPort-AV: E=Sophos;i="6.01,193,1684825200"; d="scan'208";a="771335306" Received: from srr4-3-linux-103-aknautiy.iind.intel.com ([10.223.34.160]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 22 Aug 2023 05:13:58 -0700 From: Ankit Nautiyal To: intel-gfx@lists.freedesktop.org Date: Tue, 22 Aug 2023 17:40:32 +0530 Message-Id: <20230822121033.597447-9-ankit.k.nautiyal@intel.com> X-Mailer: git-send-email 2.40.1 In-Reply-To: <20230822121033.597447-1-ankit.k.nautiyal@intel.com> References: <20230822121033.597447-1-ankit.k.nautiyal@intel.com> MIME-Version: 1.0 Subject: [Intel-gfx] [PATCH 8/9] drm/i915/dsc: Add debugfs entry to validate DSC fractional 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: manasi.d.navare@intel.com Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" From: Swati Sharma DSC_Sink_BPP_Precision entry is added to i915_dsc_fec_support_show to depict sink's precision. Also, new debugfs entry is created to enforce fractional bpp. If Force_DSC_Fractional_BPP_en is set then while iterating over output bpp with fractional step size we will continue if output_bpp is computed as integer. With this approach, we will be able to validate DSC with fractional bpp. Signed-off-by: Swati Sharma Signed-off-by: Ankit Nautiyal --- .../drm/i915/display/intel_display_debugfs.c | 82 +++++++++++++++++++ .../drm/i915/display/intel_display_types.h | 1 + 2 files changed, 83 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index 63c1fb9e479f..19975f613316 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -1240,6 +1240,8 @@ static int i915_dsc_fec_support_show(struct seq_file *m, void *data) DP_DSC_YCbCr420_Native)), str_yes_no(drm_dp_dsc_sink_supports_format(intel_dp->dsc_dpcd, DP_DSC_YCbCr444))); + seq_printf(m, "DSC_Sink_BPP_Precision: %d\n", + drm_dp_dsc_sink_bpp_incr(intel_dp->dsc_dpcd)); seq_printf(m, "Force_DSC_Enable: %s\n", str_yes_no(intel_dp->force_dsc_en)); if (!intel_dp_is_edp(intel_dp)) @@ -1432,6 +1434,83 @@ static const struct file_operations i915_dsc_output_format_fops = { .write = i915_dsc_output_format_write }; +static int i915_dsc_fractional_bpp_show(struct seq_file *m, void *data) +{ + struct drm_connector *connector = m->private; + struct drm_device *dev = connector->dev; + struct drm_crtc *crtc; + struct intel_dp *intel_dp; + struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector)); + int ret; + + if (!encoder) + return -ENODEV; + + ret = drm_modeset_lock_single_interruptible(&dev->mode_config.connection_mutex); + if (ret) + return ret; + + crtc = connector->state->crtc; + if (connector->status != connector_status_connected || !crtc) { + ret = -ENODEV; + goto out; + } + + intel_dp = intel_attached_dp(to_intel_connector(connector)); + seq_printf(m, "Force_DSC_Fractional_BPP_Enable: %s\n", + str_yes_no(intel_dp->force_dsc_fractional_bpp_en)); + +out: drm_modeset_unlock(&dev->mode_config.connection_mutex); + + return ret; +} + +static ssize_t i915_dsc_fractional_bpp_write(struct file *file, + const char __user *ubuf, + size_t len, loff_t *offp) +{ + struct drm_connector *connector = + ((struct seq_file *)file->private_data)->private; + struct intel_encoder *encoder = intel_attached_encoder(to_intel_connector(connector)); + struct drm_i915_private *i915 = to_i915(encoder->base.dev); + struct intel_dp *intel_dp = enc_to_intel_dp(encoder); + bool dsc_fractional_bpp_enable = false; + int ret; + + if (len == 0) + return 0; + + drm_dbg(&i915->drm, + "Copied %zu bytes from user to force fractional bpp for DSC\n", len); + + ret = kstrtobool_from_user(ubuf, len, &dsc_fractional_bpp_enable); + if (ret < 0) + return ret; + + drm_dbg(&i915->drm, "Got %s for DSC Fractional BPP Enable\n", + (dsc_fractional_bpp_enable) ? "true" : "false"); + intel_dp->force_dsc_fractional_bpp_en = dsc_fractional_bpp_enable; + + *offp += len; + + return len; +} + +static int i915_dsc_fractional_bpp_open(struct inode *inode, + struct file *file) +{ + return single_open(file, i915_dsc_fractional_bpp_show, inode->i_private); +} + +static const struct file_operations i915_dsc_fractional_bpp_fops = { + .owner = THIS_MODULE, + .open = i915_dsc_fractional_bpp_open, + .read = seq_read, + .llseek = seq_lseek, + .release = single_release, + .write = i915_dsc_fractional_bpp_write +}; + /* * Returns the Current CRTC's bpc. * Example usage: cat /sys/kernel/debug/dri/0/crtc-0/i915_current_bpc @@ -1509,6 +1588,9 @@ void intel_connector_debugfs_add(struct intel_connector *intel_connector) debugfs_create_file("i915_dsc_output_format", 0644, root, connector, &i915_dsc_output_format_fops); + + debugfs_create_file("i915_dsc_fractional_bpp", 0644, root, + connector, &i915_dsc_fractional_bpp_fops); } if (connector->connector_type == DRM_MODE_CONNECTOR_DSI || diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h index f749dc4e70df..5f21ee5bda21 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1796,6 +1796,7 @@ struct intel_dp { /* Display stream compression testing */ bool force_dsc_en; int force_dsc_output_format; + bool force_dsc_fractional_bpp_en; int force_dsc_bpc; bool hobl_failed;