From patchwork Tue Sep 26 08:23:30 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: "Golani, Mitulkumar Ajitkumar" X-Patchwork-Id: 13398863 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 C2676E7D25E for ; Tue, 26 Sep 2023 08:29:59 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id D672010E38C; Tue, 26 Sep 2023 08:29:58 +0000 (UTC) Received: from mgamail.intel.com (mgamail.intel.com [192.55.52.88]) by gabe.freedesktop.org (Postfix) with ESMTPS id 8B90510E384; Tue, 26 Sep 2023 08:29:41 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1695716981; x=1727252981; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=9aRLvKYkD3K3nQrnvXThyZgTxHYwaD1wH5jftQPCtlM=; b=jCddWKLqQmNv6VARFwUU+VFlABMB145AbIBoF6f+OpDm5j0Tn9wksqKv An/YfDTzZSqZw2w8KQDXEUHy/1rGg2M3olZpam4YU699fetCxp43wy3TE szMUSZckZbX407okCpwuyS758YjfxVXMIfOO9/BGt0eB1uB2CGWUYjB5v sWnEnN9Bhln5t5AgxzTii87oLDFFTMKlC9bQ5dsVa5Veqjb3YOzjP5Ffs tO33LfEmwDU3cII+FNYXSpAcJUGr9VHWBgZrFUw10rNNI2fR8b+ZKDH4g 8FRue9WmbhjMg5dFKMR72/gRlTltXgJ0P5MYXOk0YhwxRE/ZR32oPzC4x g==; X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="412431892" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="412431892" Received: from fmsmga007.fm.intel.com ([10.253.24.52]) by fmsmga101.fm.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 26 Sep 2023 01:29:41 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=McAfee;i="6600,9927,10843"; a="752079115" X-IronPort-AV: E=Sophos;i="6.03,177,1694761200"; d="scan'208";a="752079115" Received: from mgolanimitul-x299-ud4-pro.iind.intel.com ([10.190.239.114]) by fmsmga007.fm.intel.com with ESMTP; 26 Sep 2023 01:29:38 -0700 From: Mitul Golani To: dri-devel@lists.freedesktop.org, intel-gfx@lists.freedesktop.org Subject: [PATCH 7/8] drm/i915/dsc: Add debugfs entry to validate DSC fractional bpp Date: Tue, 26 Sep 2023 13:53:30 +0530 Message-Id: <20230926082331.739705-8-mitulkumar.ajitkumar.golani@intel.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> References: <20230926082331.739705-1-mitulkumar.ajitkumar.golani@intel.com> MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.29 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: suraj.kandpal@intel.com, suijingfeng@loongson.cn, jani.nikula@intel.com, Mitul Golani , swati2.sharma@intel.com, mripard@kernel.org, ankit.k.nautiyal@intel.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" 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. v2: Add drm_modeset_unlock to new line(Suraj) Signed-off-by: Swati Sharma Signed-off-by: Ankit Nautiyal Signed-off-by: Mitul Golani Reviewed-by: Suraj Kandpal --- .../drm/i915/display/intel_display_debugfs.c | 84 +++++++++++++++++++ .../drm/i915/display/intel_display_types.h | 1 + 2 files changed, 85 insertions(+) diff --git a/drivers/gpu/drm/i915/display/intel_display_debugfs.c b/drivers/gpu/drm/i915/display/intel_display_debugfs.c index f05b52381a83..8de41c820eed 100644 --- a/drivers/gpu/drm/i915/display/intel_display_debugfs.c +++ b/drivers/gpu/drm/i915/display/intel_display_debugfs.c @@ -1244,6 +1244,8 @@ 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)) @@ -1436,6 +1438,85 @@ 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_connector *intel_connector = to_intel_connector(connector); + struct intel_encoder *encoder = intel_attached_encoder(intel_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(intel_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 @@ -1513,6 +1594,9 @@ 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 c691ec2670c3..e0fe283900a5 100644 --- a/drivers/gpu/drm/i915/display/intel_display_types.h +++ b/drivers/gpu/drm/i915/display/intel_display_types.h @@ -1804,6 +1804,7 @@ 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;