From mboxrd@z Thu Jan 1 00:00:00 1970 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 631E8C04FFF for ; Tue, 16 Apr 2024 12:21:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 5600E112C2A; Tue, 16 Apr 2024 12:21:40 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=suse.de header.i=@suse.de header.b="sizbC0Sy"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="IPWjMZvb"; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="sizbC0Sy"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="IPWjMZvb"; dkim-atps=neutral Received: from smtp-out2.suse.de (smtp-out2.suse.de [195.135.223.131]) by gabe.freedesktop.org (Postfix) with ESMTPS id B000C112C23; Tue, 16 Apr 2024 12:21:38 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (imap1.dmz-prg2.suse.org [10.150.64.97]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by smtp-out2.suse.de (Postfix) with ESMTPS id 3BC3F5F7B7; Tue, 16 Apr 2024 12:21:37 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1713270097; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=5GlQjzXybNZYQ+OpKWyZEnlATF0dizVQocwZgqxfwWg=; b=sizbC0SynqP4hb+sovRMbF3l1FxmsaAyMnMp9WYu+oBwIcIpDKy7gDhwXrEDenj+8Y1NLz gRZIP06L1SZiVfJAU7NFXtcOFoqgzrAYljbg6BwO1x1iTntPHscGmcH1Vni+WZoAX4aJ8j u/zpVWlKLl+tMdbp/MafolruKDAUztU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1713270097; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=5GlQjzXybNZYQ+OpKWyZEnlATF0dizVQocwZgqxfwWg=; b=IPWjMZvbzXRppnDilLnEcyVeme0wIpy++wZpbEE+xfMyD4LyRcANz5vFET1xIdaEwPcCKl rElTJVwnXlgRzYBw== Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1713270097; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=5GlQjzXybNZYQ+OpKWyZEnlATF0dizVQocwZgqxfwWg=; b=sizbC0SynqP4hb+sovRMbF3l1FxmsaAyMnMp9WYu+oBwIcIpDKy7gDhwXrEDenj+8Y1NLz gRZIP06L1SZiVfJAU7NFXtcOFoqgzrAYljbg6BwO1x1iTntPHscGmcH1Vni+WZoAX4aJ8j u/zpVWlKLl+tMdbp/MafolruKDAUztU= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1713270097; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version:content-type:content-type: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references:autocrypt:autocrypt; bh=5GlQjzXybNZYQ+OpKWyZEnlATF0dizVQocwZgqxfwWg=; b=IPWjMZvbzXRppnDilLnEcyVeme0wIpy++wZpbEE+xfMyD4LyRcANz5vFET1xIdaEwPcCKl rElTJVwnXlgRzYBw== Received: from imap1.dmz-prg2.suse.org (localhost [127.0.0.1]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature RSA-PSS (4096 bits) server-digest SHA256) (No client certificate requested) by imap1.dmz-prg2.suse.org (Postfix) with ESMTPS id 1B79F13931; Tue, 16 Apr 2024 12:21:37 +0000 (UTC) Received: from dovecot-director2.suse.de ([10.150.64.162]) by imap1.dmz-prg2.suse.org with ESMTPSA id hFp5BVFtHmbpPgAAD6G6ig (envelope-from ); Tue, 16 Apr 2024 12:21:37 +0000 Message-ID: Date: Tue, 16 Apr 2024 14:21:36 +0200 MIME-Version: 1.0 User-Agent: Mozilla Thunderbird Subject: Re: [REBASE 7/7] drm/edid: make drm_edid_are_equal() more convenient for its single user To: Jani Nikula , dri-devel@lists.freedesktop.org Cc: intel-gfx@lists.freedesktop.org, intel-xe@lists.freedesktop.org References: <1011a285d30babce3aabd8218abb7ece7dcf58a2.1713259151.git.jani.nikula@intel.com> Content-Language: en-US From: Thomas Zimmermann Autocrypt: addr=tzimmermann@suse.de; keydata= xsBNBFs50uABCADEHPidWt974CaxBVbrIBwqcq/WURinJ3+2WlIrKWspiP83vfZKaXhFYsdg XH47fDVbPPj+d6tQrw5lPQCyqjwrCPYnq3WlIBnGPJ4/jreTL6V+qfKRDlGLWFjZcsrPJGE0 BeB5BbqP5erN1qylK9i3gPoQjXGhpBpQYwRrEyQyjuvk+Ev0K1Jc5tVDeJAuau3TGNgah4Yc hdHm3bkPjz9EErV85RwvImQ1dptvx6s7xzwXTgGAsaYZsL8WCwDaTuqFa1d1jjlaxg6+tZsB 9GluwvIhSezPgnEmimZDkGnZRRSFiGP8yjqTjjWuf0bSj5rUnTGiyLyRZRNGcXmu6hjlABEB AAHNJ1Rob21hcyBaaW1tZXJtYW5uIDx0emltbWVybWFubkBzdXNlLmRlPsLAjgQTAQgAOAIb AwULCQgHAgYVCgkICwIEFgIDAQIeAQIXgBYhBHIX+6yM6c9jRKFo5WgNwR1TC3ojBQJftODH AAoJEGgNwR1TC3ojx1wH/0hKGWugiqDgLNXLRD/4TfHBEKmxIrmfu9Z5t7vwUKfwhFL6hqvo lXPJJKQpQ2z8+X2vZm/slsLn7J1yjrOsoJhKABDi+3QWWSGkaGwRJAdPVVyJMfJRNNNIKwVb U6B1BkX2XDKDGffF4TxlOpSQzdtNI/9gleOoUA8+jy8knnDYzjBNOZqLG2FuTdicBXblz0Mf vg41gd9kCwYXDnD91rJU8tzylXv03E75NCaTxTM+FBXPmsAVYQ4GYhhgFt8S2UWMoaaABLDe 7l5FdnLdDEcbmd8uLU2CaG4W2cLrUaI4jz2XbkcPQkqTQ3EB67hYkjiEE6Zy3ggOitiQGcqp j//OwE0EWznS4AEIAMYmP4M/V+T5RY5at/g7rUdNsLhWv1APYrh9RQefODYHrNRHUE9eosYb T6XMryR9hT8XlGOYRwKWwiQBoWSDiTMo/Xi29jUnn4BXfI2px2DTXwc22LKtLAgTRjP+qbU6 3Y0xnQN29UGDbYgyyK51DW3H0If2a3JNsheAAK+Xc9baj0LGIc8T9uiEWHBnCH+RdhgATnWW GKdDegUR5BkDfDg5O/FISymJBHx2Dyoklv5g4BzkgqTqwmaYzsl8UxZKvbaxq0zbehDda8lv hFXodNFMAgTLJlLuDYOGLK2AwbrS3Sp0AEbkpdJBb44qVlGm5bApZouHeJ/+n+7r12+lqdsA EQEAAcLAdgQYAQgAIAIbDBYhBHIX+6yM6c9jRKFo5WgNwR1TC3ojBQJftOH6AAoJEGgNwR1T C3ojVSkIALpAPkIJPQoURPb1VWjh34l0HlglmYHvZszJWTXYwavHR8+k6Baa6H7ufXNQtThR yIxJrQLW6rV5lm7TjhffEhxVCn37+cg0zZ3j7zIsSS0rx/aMwi6VhFJA5hfn3T0TtrijKP4A SAQO9xD1Zk9/61JWk8OysuIh7MXkl0fxbRKWE93XeQBhIJHQfnc+YBLprdnxR446Sh8Wn/2D Ya8cavuWf2zrB6cZurs048xe0UbSW5AOSo4V9M0jzYI4nZqTmPxYyXbm30Kvmz0rYVRaitYJ 4kyYYMhuULvrJDMjZRvaNe52tkKAvMevcGdt38H4KSVXAylqyQOW5zvPc4/sq9c= In-Reply-To: <1011a285d30babce3aabd8218abb7ece7dcf58a2.1713259151.git.jani.nikula@intel.com> Content-Type: text/plain; charset=UTF-8; format=flowed Content-Transfer-Encoding: 7bit X-Spamd-Result: default: False [-4.29 / 50.00]; BAYES_HAM(-3.00)[100.00%]; NEURAL_HAM_LONG(-1.00)[-1.000]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; XM_UA_NO_VERSION(0.01)[]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; TO_DN_SOME(0.00)[]; MID_RHS_MATCH_FROM(0.00)[]; ARC_NA(0.00)[]; RCVD_TLS_ALL(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FUZZY_BLOCKED(0.00)[rspamd.com]; FROM_HAS_DN(0.00)[]; RCPT_COUNT_THREE(0.00)[4]; FROM_EQ_ENVFROM(0.00)[]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_COUNT_TWO(0.00)[2]; DBL_BLOCKED_OPENRESOLVER(0.00)[imap1.dmz-prg2.suse.org:helo, imap1.dmz-prg2.suse.org:rdns, intel.com:email] 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: , Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" Hi Am 16.04.24 um 11:20 schrieb Jani Nikula: > Repurpose drm_edid_are_equal() to be more helpful for its single user, > and rename drm_edid_eq(). Functionally deduce the length from the blob > size, not the blob data, making it more robust against any errors. Could be squashed into patch 6. Best regards Thomas > > Signed-off-by: Jani Nikula > --- > drivers/gpu/drm/drm_edid.c | 41 ++++++++++++++------------------------ > 1 file changed, 15 insertions(+), 26 deletions(-) > > diff --git a/drivers/gpu/drm/drm_edid.c b/drivers/gpu/drm/drm_edid.c > index 463fbad85d90..513590931cc5 100644 > --- a/drivers/gpu/drm/drm_edid.c > +++ b/drivers/gpu/drm/drm_edid.c > @@ -1820,30 +1820,20 @@ static bool edid_block_is_zero(const void *edid) > return !memchr_inv(edid, 0, EDID_LENGTH); > } > > -/** > - * drm_edid_are_equal - compare two edid blobs. > - * @edid1: pointer to first blob > - * @edid2: pointer to second blob > - * This helper can be used during probing to determine if > - * edid had changed. > - */ > -static bool drm_edid_are_equal(const struct edid *edid1, const struct edid *edid2) > +static bool drm_edid_eq(const struct drm_edid *drm_edid, > + const void *raw_edid, size_t raw_edid_size) > { > - int edid1_len, edid2_len; > - bool edid1_present = edid1 != NULL; > - bool edid2_present = edid2 != NULL; > + bool edid1_present = drm_edid && drm_edid->edid && drm_edid->size; > + bool edid2_present = raw_edid && raw_edid_size; > > if (edid1_present != edid2_present) > return false; > > - if (edid1) { > - edid1_len = edid_size(edid1); > - edid2_len = edid_size(edid2); > - > - if (edid1_len != edid2_len) > + if (edid1_present) { > + if (drm_edid->size != raw_edid_size) > return false; > > - if (memcmp(edid1, edid2, edid1_len)) > + if (memcmp(drm_edid->edid, raw_edid, drm_edid->size)) > return false; > } > > @@ -6936,15 +6926,14 @@ static int _drm_edid_connector_property_update(struct drm_connector *connector, > int ret; > > if (connector->edid_blob_ptr) { > - const struct edid *old_edid = connector->edid_blob_ptr->data; > - > - if (old_edid) { > - if (!drm_edid_are_equal(drm_edid ? drm_edid->edid : NULL, old_edid)) { > - connector->epoch_counter++; > - drm_dbg_kms(dev, "[CONNECTOR:%d:%s] EDID changed, epoch counter %llu\n", > - connector->base.id, connector->name, > - connector->epoch_counter); > - } > + const void *old_edid = connector->edid_blob_ptr->data; > + size_t old_edid_size = connector->edid_blob_ptr->length; > + > + if (old_edid && !drm_edid_eq(drm_edid, old_edid, old_edid_size)) { > + connector->epoch_counter++; > + drm_dbg_kms(dev, "[CONNECTOR:%d:%s] EDID changed, epoch counter %llu\n", > + connector->base.id, connector->name, > + connector->epoch_counter); > } > } > -- -- Thomas Zimmermann Graphics Driver Developer SUSE Software Solutions Germany GmbH Frankenstrasse 146, 90461 Nuernberg, Germany GF: Ivo Totev, Andrew Myers, Andrew McDonald, Boudien Moerman HRB 36809 (AG Nuernberg)