From patchwork Tue Mar 29 18:42:18 2022 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 8bit X-Patchwork-Submitter: Jani Nikula X-Patchwork-Id: 12795202 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 3C51CC433EF for ; Tue, 29 Mar 2022 18:43:21 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 3A87710E8A7; Tue, 29 Mar 2022 18:43:20 +0000 (UTC) Received: from mga07.intel.com (mga07.intel.com [134.134.136.100]) by gabe.freedesktop.org (Postfix) with ESMTPS id EA29410E8A7; Tue, 29 Mar 2022 18:43:17 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=intel.com; i=@intel.com; q=dns/txt; s=Intel; t=1648579398; x=1680115398; h=from:to:cc:subject:date:message-id:in-reply-to: references:mime-version:content-transfer-encoding; bh=CWMsp6PMtY3HPqRPU8nhVENH4x5YiXre/xgjmr31Nbo=; b=fLSi3hdWowZDVjJ8yuto9GTegJIBxCb99/0Ua1ys1e2w7/cbJmX7yWie 3rLM1j+wgryak5cs3AqEy9L+0yebJ7RNBRT0raPpPGSPDiTnE/fI/YCVU TlrOgqcZ9/EntPCu6X42weGR9NBQk35xgu0i3sYEapbw8gEfZwvCUulX6 yNDWLH0vdBByV2QbIo/T1Omnt1m3RDCqM8XJpgothiIDlKuexIPoFCrze 63QlNthZ9lAY39zm0s2S9zvREHyR8hdLXjR03SMX21c8taM3SGhjChYXe LWsiGR88t0J2Yz885swiIWs73CYqe+r8WqDgkYo4W2oGDLbZmYyLNaccP g==; X-IronPort-AV: E=McAfee;i="6200,9189,10301"; a="322518379" X-IronPort-AV: E=Sophos;i="5.90,220,1643702400"; d="scan'208";a="322518379" Received: from orsmga001.jf.intel.com ([10.7.209.18]) by orsmga105.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2022 11:43:16 -0700 X-IronPort-AV: E=Sophos;i="5.90,220,1643702400"; d="scan'208";a="585694743" Received: from dmendyk-mobl.ger.corp.intel.com (HELO localhost) ([10.252.63.121]) by orsmga001-auth.jf.intel.com with ESMTP/TLS/ECDHE-RSA-AES256-GCM-SHA384; 29 Mar 2022 11:43:14 -0700 From: Jani Nikula To: dri-devel@lists.freedesktop.org Subject: [PATCH 11/12] drm/edid: track invalid blocks in drm_do_get_edid() Date: Tue, 29 Mar 2022 21:42:18 +0300 Message-Id: X-Mailer: git-send-email 2.30.2 In-Reply-To: References: MIME-Version: 1.0 Organization: Intel Finland Oy - BIC 0357606-4 - Westendinkatu 7, 02160 Espoo 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: jani.nikula@intel.com, intel-gfx@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Track invalid blocks instead of valid extensions to minimize impact on the happy day scenario, and hide the details in the separate function. Cc: Ville Syrjälä Signed-off-by: Jani Nikula --- drivers/gpu/drm/drm_edid.c | 17 ++++++++--------- 1 file changed, 8 insertions(+), 9 deletions(-) diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c index dee95332d7e1..d0a76781ed19 100644 --- a/drivers/gpu/drm/drm_edid.c +++ b/drivers/gpu/drm/drm_edid.c @@ -1822,9 +1822,10 @@ bool drm_edid_is_valid(struct edid *edid) EXPORT_SYMBOL(drm_edid_is_valid); static struct edid *edid_filter_invalid_blocks(const struct edid *edid, - int valid_extensions) + int invalid_blocks) { struct edid *new, *base; + int valid_extensions = edid->extensions - invalid_blocks; int i; new = kmalloc_array(valid_extensions + 1, EDID_LENGTH, GFP_KERNEL); @@ -2060,7 +2061,7 @@ struct edid *drm_do_get_edid(struct drm_connector *connector, size_t len), void *data) { - int j, valid_extensions = 0; + int j, invalid_blocks = 0; struct edid *edid, *new, *override; override = drm_get_override_edid(connector); @@ -2071,12 +2072,10 @@ struct edid *drm_do_get_edid(struct drm_connector *connector, if (!edid) return NULL; - /* if there's no extensions or no connector, we're done */ - valid_extensions = edid->extensions; - if (valid_extensions == 0) + if (edid->extensions == 0) return edid; - new = krealloc(edid, (valid_extensions + 1) * EDID_LENGTH, GFP_KERNEL); + new = krealloc(edid, (edid->extensions + 1) * EDID_LENGTH, GFP_KERNEL); if (!new) goto out; edid = new; @@ -2093,13 +2092,13 @@ struct edid *drm_do_get_edid(struct drm_connector *connector, } if (try == 4) - valid_extensions--; + invalid_blocks++; } - if (valid_extensions != edid->extensions) { + if (invalid_blocks) { connector_bad_edid(connector, (u8 *)edid, edid->extensions + 1); - edid = edid_filter_invalid_blocks(edid, valid_extensions); + edid = edid_filter_invalid_blocks(edid, invalid_blocks); } return edid;