From patchwork Thu Oct 24 00:00:41 2019 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: "Navare, Manasi" X-Patchwork-Id: 11208091 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 C0E9613BD for ; Wed, 23 Oct 2019 23:58:46 +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 A910C207FD for ; Wed, 23 Oct 2019 23:58:46 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org A910C207FD Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=intel.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id EF4026E051; Wed, 23 Oct 2019 23:58:42 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from mga03.intel.com (mga03.intel.com [134.134.136.65]) by gabe.freedesktop.org (Postfix) with ESMTPS id 66FED6E051; Wed, 23 Oct 2019 23:58:41 +0000 (UTC) X-Amp-Result: SKIPPED(no attachment in message) X-Amp-File-Uploaded: False Received: from orsmga002.jf.intel.com ([10.7.209.21]) by orsmga103.jf.intel.com with ESMTP/TLS/DHE-RSA-AES256-GCM-SHA384; 23 Oct 2019 16:58:40 -0700 X-ExtLoop1: 1 X-IronPort-AV: E=Sophos;i="5.68,222,1569308400"; d="scan'208";a="210198107" Received: from labuser-z97x-ud5h.jf.intel.com ([10.54.75.49]) by orsmga002.jf.intel.com with ESMTP; 23 Oct 2019 16:58:40 -0700 From: Manasi Navare To: intel-gfx@lists.freedesktop.org, dri-devel@lists.freedesktop.org Subject: [PATCH] drm/dp: Add function to parse EDID descriptors for adaptive sync limits Date: Wed, 23 Oct 2019 17:00:41 -0700 Message-Id: <20191024000041.7391-1-manasi.d.navare@intel.com> X-Mailer: git-send-email 2.19.1 MIME-Version: 1.0 X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.23 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Cc: Manasi Navare Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Adaptive Sync is a VESA feature so add a DRM core helper to parse the EDID's detailed descritors to obtain the adaptive sync monitor range. Store this info as part fo drm_display_info so it can be used across all drivers. This part of the code is stripped out of amdgpu's function amdgpu_dm_update_freesync_caps() to make it generic and be used across all DRM drivers Cc: Ville Syrjälä Cc: Harry Wentland Cc: Clinton A Taylor Signed-off-by: Manasi Navare --- drivers/gpu/drm/drm_edid.c | 49 +++++++++++++++++++++++++++++++++++++ include/drm/drm_connector.h | 25 +++++++++++++++++++ include/drm/drm_edid.h | 2 ++ 3 files changed, 76 insertions(+) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index 474ac04d5600..97dd1200773e 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -4707,6 +4707,52 @@ static void drm_parse_cea_ext(struct drm_connector *connector, } } +void drm_get_adaptive_sync_limits(struct drm_connector *connector, + const struct edid *edid) +{ + struct drm_display_info *info = &connector->display_info; + const struct detailed_timing *timing; + const struct detailed_non_pixel *data; + const struct detailed_data_monitor_range *range; + int i; + + /* + * Restrict Adaptive Sync only for dp and edp + */ + if (connector->connector_type != DRM_MODE_CONNECTOR_DisplayPort && + connector->connector_type != DRM_MODE_CONNECTOR_eDP) + return; + + if (edid->version <= 1 && !(edid->version == 1 && edid->revision > 1)) + return; + + for (i = 0; i < 4; i++) { + timing = &edid->detailed_timings[i]; + data = &timing->data.other_data; + range = &data->data.range; + /* + * Check if monitor has continuous frequency mode + */ + if (data->type != EDID_DETAIL_MONITOR_RANGE) + continue; + /* + * Check for flag range limits only. If flag == 1 then + * no additional timing information provided. + * Default GTF, GTF Secondary curve and CVT are not + * supported + */ + if (range->flags != 1) + continue; + + info->adaptive_sync.min_vfreq = range->min_vfreq; + info->adaptive_sync.max_vfreq = range->max_vfreq; + info->adaptive_sync.pixel_clock_mhz = + range->pixel_clock_mhz * 10; + break; + } +} +EXPORT_SYMBOL(drm_get_adaptive_sync_limits); + /* A connector has no EDID information, so we've got no EDID to compute quirks from. Reset * all of the values which would have been set from EDID */ @@ -4728,6 +4774,7 @@ drm_reset_display_info(struct drm_connector *connector) memset(&info->hdmi, 0, sizeof(info->hdmi)); info->non_desktop = 0; + memset(&info->adaptive_sync, 0, sizeof(info->adaptive_sync)); } u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edid) @@ -4743,6 +4790,8 @@ u32 drm_add_display_info(struct drm_connector *connector, const struct edid *edi info->non_desktop = !!(quirks & EDID_QUIRK_NON_DESKTOP); + drm_get_adaptive_sync_limits(connector, edid); + DRM_DEBUG_KMS("non_desktop set to %d\n", info->non_desktop); if (edid->revision < 3) diff --git a/include/drm/drm_connector.h b/include/drm/drm_connector.h index 5f8c3389d46f..a27a84270d8d 100644 --- a/include/drm/drm_connector.h +++ b/include/drm/drm_connector.h @@ -254,6 +254,26 @@ enum drm_panel_orientation { DRM_MODE_PANEL_ORIENTATION_RIGHT_UP, }; +/** + * struct drm_adaptive_sync_info - Panel's Adaptive Sync capabilities for + * &drm_display_info + * + * This struct is used to store a Panel's Adaptive Sync capabilities + * as parsed from EDID's detailed monitor range descriptor block. + * + * @min_vfreq: This is the min supported refresh rate in Hz from + * EDID's detailed monitor range. + * @max_vfreq: This is the max supported refresh rate in Hz from + * EDID's detailed monitor range + * @pixel_clock_mhz: This is the dotclock in MHz from + * EDID's detailed monitor range + */ +struct drm_adaptive_sync_info { + int min_vfreq; + int max_vfreq; + int pixel_clock_mhz; +}; + /* * This is a consolidated colorimetry list supported by HDMI and * DP protocol standard. The respective connectors will register @@ -465,6 +485,11 @@ struct drm_display_info { * @non_desktop: Non desktop display (HMD). */ bool non_desktop; + + /** + * @adaptive_sync: Adaptive Sync capabilities of the DP/eDP sink + */ + struct drm_adaptive_sync_info adaptive_sync; }; int drm_display_info_set_bus_formats(struct drm_display_info *info, diff --git a/include/drm/drm_edid.h b/include/drm/drm_edid.h index f0b03d401c27..b9a230aa3e69 100644 --- a/include/drm/drm_edid.h +++ b/include/drm/drm_edid.h @@ -503,4 +503,6 @@ void drm_edid_get_monitor_name(struct edid *edid, char *name, struct drm_display_mode *drm_mode_find_dmt(struct drm_device *dev, int hsize, int vsize, int fresh, bool rb); +void drm_get_adaptive_sync_limits(struct drm_connector *connector, + const struct edid *edid); #endif /* __DRM_EDID_H__ */