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 X-Spam-Level: X-Spam-Status: No, score=-12.0 required=3.0 tests=BAYES_00, DKIM_ADSP_CUSTOM_MED,DKIM_INVALID,DKIM_SIGNED,FREEMAIL_FORGED_FROMDOMAIN, FREEMAIL_FROM,HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER, INCLUDES_PATCH,MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED, USER_AGENT_SANE_2 autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 992D5C433B4 for ; Tue, 13 Apr 2021 11:56:28 +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 53155613A9 for ; Tue, 13 Apr 2021 11:56:28 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org 53155613A9 Authentication-Results: mail.kernel.org; dmarc=fail (p=none dis=none) header.from=gmail.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=intel-gfx-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 07B6A89DEA; Tue, 13 Apr 2021 11:56:24 +0000 (UTC) Received: from mail-lj1-x233.google.com (mail-lj1-x233.google.com [IPv6:2a00:1450:4864:20::233]) by gabe.freedesktop.org (Postfix) with ESMTPS id A8C1689D7B; Tue, 13 Apr 2021 11:56:22 +0000 (UTC) Received: by mail-lj1-x233.google.com with SMTP id p23so15352552ljn.0; Tue, 13 Apr 2021 04:56:22 -0700 (PDT) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=gmail.com; s=20161025; h=date:from:to:cc:subject:message-id:in-reply-to:references :mime-version; bh=lmMHhXwp4JmFcVhYlaA4WGTJhPxaIkhUZQDPimSZgGI=; b=Yq/VZe/AXNgvcMa/jw/kOk/wv6H8MKkTjzQFS2oP8lYWXlSJh3p+I+CKMdXuXCjep3 rqRFFp4HryEXN9iqRbkatpwAwCbTiEQOK/yOXdMPETAOvALTsbDeSXFKRXBGIp/54TV/ Wc75NUJkDbiv64qzMVcCfxnhcrIsM056WLgZKfiv9cYaqmdwcgr/lMNtow7/CZh1gK2e Yhoo0ck96s3nzzOmXTxDAZ/yyWUtYJI8eCVCT5VOS1oAxy49ooih0AjxpodTcs9Xz7r8 RV8qut6BFLbivyFun4S9E1d0G0uLwc7wIurfqEwbW4Pt6lMO1IXXxcEPDRpbLdCZvpD2 hQDg== X-Google-DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=1e100.net; s=20161025; h=x-gm-message-state:date:from:to:cc:subject:message-id:in-reply-to :references:mime-version; bh=lmMHhXwp4JmFcVhYlaA4WGTJhPxaIkhUZQDPimSZgGI=; b=XE95AnU2s4SHfx8xh/PhHEq/BvwSi8l1n5T7dGMkM7E9JOjmX7CMKRGxRUJf/tI1qZ u1LdZCrMcfPjMgExOy1ygK4f/38kMmfaC/gacRJ6hAn0QWHOXDBtMlCrVjW3QldVbB1F oVUYZL7OU1zwtXKVSJxmWGnc7pT77VlAfcUz9YiPNQ3e8v6wqQNSQ/wKYQ9IXwx36o5K XZBFvjWstKNccOkeTbhFQ+AvnX+VlEjz/xk933tPgiRzQnhRkkGT9Eo3zafXF1d3tOQt 2xCd/T6iyc8WgbnW7Oxt3PHEX+FAQkny/A4Y0jjox1BNfowR/yXAgMdBk+xWJpzERiYr UqJA== X-Gm-Message-State: AOAM5325msUGyt41j9fIYOzmCQTVODuC+j7+RAxYHN2uEYzVF+x0pvrM bYaW6sCQZldamM/3hTDj+Ik= X-Google-Smtp-Source: ABdhPJxPu2MXpF9eHZjFuq7K6Cj3/HItwd1C2qw7/QgSLLSAVr1VH87auWcgtDrbCBcs1MImDHhq5w== X-Received: by 2002:a2e:8616:: with SMTP id a22mr20975915lji.509.1618314980961; Tue, 13 Apr 2021 04:56:20 -0700 (PDT) Received: from eldfell ([194.136.85.206]) by smtp.gmail.com with ESMTPSA id p12sm1830898lfu.85.2021.04.13.04.56.20 (version=TLS1_3 cipher=TLS_AES_256_GCM_SHA384 bits=256/256); Tue, 13 Apr 2021 04:56:20 -0700 (PDT) Date: Tue, 13 Apr 2021 14:56:02 +0300 From: Pekka Paalanen To: Daniel Vetter Message-ID: <20210413145602.70f674b1@eldfell> In-Reply-To: <20210413094904.3736372-12-daniel.vetter@ffwll.ch> References: <20210413094904.3736372-1-daniel.vetter@ffwll.ch> <20210413094904.3736372-12-daniel.vetter@ffwll.ch> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) MIME-Version: 1.0 Subject: Re: [Intel-gfx] [PATCH 12/12] drm/modifiers: Enforce consistency between the cap an IN_FORMATS 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: David Airlie , Daniel Vetter , Intel Graphics Development , Thomas Zimmermann , DRI Development Content-Type: multipart/mixed; boundary="===============0590615807==" Errors-To: intel-gfx-bounces@lists.freedesktop.org Sender: "Intel-gfx" --===============0590615807== Content-Type: multipart/signed; micalg=pgp-sha256; boundary="Sig_/Jeo3XQlThZDgIRmrUjCVX6m"; protocol="application/pgp-signature" --Sig_/Jeo3XQlThZDgIRmrUjCVX6m Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 13 Apr 2021 11:49:03 +0200 Daniel Vetter wrote: > It's very confusing for userspace to have to deal with inconsistencies > here, and some drivers screwed this up a bit. Most just ommitted the > format list when they meant to say that only linear modifier is > allowed, but some also meant that only implied modifiers are > acceptable (because actually none of the planes registered supported > modifiers). >=20 > Now that this is all done consistently across all drivers, document > the rules and enforce it in the drm core. >=20 > Cc: Pekka Paalanen > Signed-off-by: Daniel Vetter > Cc: Maarten Lankhorst > Cc: Maxime Ripard > Cc: Thomas Zimmermann > Cc: David Airlie > Cc: Daniel Vetter > --- > drivers/gpu/drm/drm_plane.c | 16 +++++++++++++++- > include/drm/drm_mode_config.h | 2 ++ > 2 files changed, 17 insertions(+), 1 deletion(-) >=20 > diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c > index 0dd43882fe7c..16a7e3e57f7f 100644 > --- a/drivers/gpu/drm/drm_plane.c > +++ b/drivers/gpu/drm/drm_plane.c > @@ -128,6 +128,11 @@ > * pairs supported by this plane. The blob is a struct > * drm_format_modifier_blob. Without this property the plane doesn't > * support buffers with modifiers. Userspace cannot change this prop= erty. > + * > + * Note that userspace can check the DRM_CAP_ADDFB2_MODIFIERS driver > + * capability for general modifier support. If this flag is set then= every > + * plane will have the IN_FORMATS property, even when it only suppor= ts > + * DRM_FORMAT_MOD_LINEAR. Ooh, that's even better. But isn't that changing the meaning of the cap? Isn't the cap older than IN_FORMATS? What about the opposite? Is it allowed to have even a single IN_FORMATS if you don't have the cap? > */ > =20 > static unsigned int drm_num_planes(struct drm_device *dev) > @@ -277,8 +282,14 @@ static int __drm_universal_plane_init(struct drm_dev= ice *dev, > format_modifier_count++; > } > =20 > - if (format_modifier_count) > + /* autoset the cap and check for consistency across all planes */ > + if (format_modifier_count) { > + WARN_ON(!config->allow_fb_modifiers && > + !list_empty(&config->plane_list)); What does this mean? > config->allow_fb_modifiers =3D true; > + } else { > + WARN_ON(config->allow_fb_modifiers); > + } > =20 > plane->modifier_count =3D format_modifier_count; > plane->modifiers =3D kmalloc_array(format_modifier_count, > @@ -360,6 +371,9 @@ static int __drm_universal_plane_init(struct drm_devi= ce *dev, > * drm_universal_plane_init() to let the DRM managed resource infrastruc= ture > * take care of cleanup and deallocation. > * > + * Drivers supporting modifiers must set @format_modifiers on all their = planes, > + * even those that only support DRM_FORMAT_MOD_LINEAR. Good. > + * > * Returns: > * Zero on success, error code on failure. > */ > diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h > index ab424ddd7665..1ddf7783fdf7 100644 > --- a/include/drm/drm_mode_config.h > +++ b/include/drm/drm_mode_config.h > @@ -909,6 +909,8 @@ struct drm_mode_config { > * @allow_fb_modifiers: > * > * Whether the driver supports fb modifiers in the ADDFB2.1 ioctl call. > + * Note that drivers should not set this directly, it is automatically > + * set in drm_universal_plane_init(). > * > * IMPORTANT: > * Thanks, pq --Sig_/Jeo3XQlThZDgIRmrUjCVX6m Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEJQjwWQChkWOYOIONI1/ltBGqqqcFAmB1htIACgkQI1/ltBGq qqeHOQ/8Chckz7qKtENYTlTJ3xXUFDUT4E2yCfUfyLUoHHM/FalRemG14IIBcv4A uVt1c2wVc97uBR/YvTWK+zyIjmtJwH0G1ltn37b9c5veRv/dfFQdCzjZElkue1hk blGJ0TIvA7FaOlDeNTLv1VPnIUBzOPqXs9tQ66MTx2nMq+ZA2uWFzu/STRUcKTAm jj8+rfPMPrpyohYv3gk2u2RLt+vNN9v91zAA4bsxPDSD4DWUxSILZttDI/kklVAz v3P9q3QbCvTYKp1D+c/EWm3WcoPjXo9tAgdoHdMZZUwxMnI0hB4gHEEiA6rdzmB1 1JtoWIIo8tNJnLwNv4X9CAisM4hPg4TcOPmjJUuHnHTEN3A63UDX8QQTURvTeN4d eEY6yx+l8S+hkc64KXWv/VpEkRqCzhaaS+UufMtN2Or3MomqAamUGTbvlQs2QF+y PGZ6lEk+mH3aUB9W6mgqj0nbQYsuGUM1cLFKVW/rEjxPMs4vTiQS1jEgvW7P3RM9 JBIc0/9c73KJ/dgLtsH+S/Pb6oujalg7pAlgctO2yXr1XiFeiWliDyQ356echlcq Zla1Plx3txVXobqu13ubQ6bOuTfEXrVHbWddi8y2K76P7IA3Qc8XAYgnxJEEYNdg cWlvuQ0dvp6Uf5oFMXR2z8GGcvUtN1bOceSrrmZQu1W7WYOtlNU= =Nncx -----END PGP SIGNATURE----- --Sig_/Jeo3XQlThZDgIRmrUjCVX6m-- --===============0590615807== Content-Type: text/plain; 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Tue, 13 Apr 2021 04:56:20 -0700 (PDT) Date: Tue, 13 Apr 2021 14:56:02 +0300 From: Pekka Paalanen To: Daniel Vetter Subject: Re: [PATCH 12/12] drm/modifiers: Enforce consistency between the cap an IN_FORMATS Message-ID: <20210413145602.70f674b1@eldfell> In-Reply-To: <20210413094904.3736372-12-daniel.vetter@ffwll.ch> References: <20210413094904.3736372-1-daniel.vetter@ffwll.ch> <20210413094904.3736372-12-daniel.vetter@ffwll.ch> X-Mailer: Claws Mail 3.17.3 (GTK+ 2.24.32; x86_64-pc-linux-gnu) 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: David Airlie , Daniel Vetter , Intel Graphics Development , Thomas Zimmermann , DRI Development Content-Type: multipart/mixed; boundary="===============0457246137==" Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" --===============0457246137== Content-Type: multipart/signed; micalg=pgp-sha256; boundary="Sig_/Jeo3XQlThZDgIRmrUjCVX6m"; protocol="application/pgp-signature" --Sig_/Jeo3XQlThZDgIRmrUjCVX6m Content-Type: text/plain; charset=US-ASCII Content-Transfer-Encoding: quoted-printable On Tue, 13 Apr 2021 11:49:03 +0200 Daniel Vetter wrote: > It's very confusing for userspace to have to deal with inconsistencies > here, and some drivers screwed this up a bit. Most just ommitted the > format list when they meant to say that only linear modifier is > allowed, but some also meant that only implied modifiers are > acceptable (because actually none of the planes registered supported > modifiers). >=20 > Now that this is all done consistently across all drivers, document > the rules and enforce it in the drm core. >=20 > Cc: Pekka Paalanen > Signed-off-by: Daniel Vetter > Cc: Maarten Lankhorst > Cc: Maxime Ripard > Cc: Thomas Zimmermann > Cc: David Airlie > Cc: Daniel Vetter > --- > drivers/gpu/drm/drm_plane.c | 16 +++++++++++++++- > include/drm/drm_mode_config.h | 2 ++ > 2 files changed, 17 insertions(+), 1 deletion(-) >=20 > diff --git a/drivers/gpu/drm/drm_plane.c b/drivers/gpu/drm/drm_plane.c > index 0dd43882fe7c..16a7e3e57f7f 100644 > --- a/drivers/gpu/drm/drm_plane.c > +++ b/drivers/gpu/drm/drm_plane.c > @@ -128,6 +128,11 @@ > * pairs supported by this plane. The blob is a struct > * drm_format_modifier_blob. Without this property the plane doesn't > * support buffers with modifiers. Userspace cannot change this prop= erty. > + * > + * Note that userspace can check the DRM_CAP_ADDFB2_MODIFIERS driver > + * capability for general modifier support. If this flag is set then= every > + * plane will have the IN_FORMATS property, even when it only suppor= ts > + * DRM_FORMAT_MOD_LINEAR. Ooh, that's even better. But isn't that changing the meaning of the cap? Isn't the cap older than IN_FORMATS? What about the opposite? Is it allowed to have even a single IN_FORMATS if you don't have the cap? > */ > =20 > static unsigned int drm_num_planes(struct drm_device *dev) > @@ -277,8 +282,14 @@ static int __drm_universal_plane_init(struct drm_dev= ice *dev, > format_modifier_count++; > } > =20 > - if (format_modifier_count) > + /* autoset the cap and check for consistency across all planes */ > + if (format_modifier_count) { > + WARN_ON(!config->allow_fb_modifiers && > + !list_empty(&config->plane_list)); What does this mean? > config->allow_fb_modifiers =3D true; > + } else { > + WARN_ON(config->allow_fb_modifiers); > + } > =20 > plane->modifier_count =3D format_modifier_count; > plane->modifiers =3D kmalloc_array(format_modifier_count, > @@ -360,6 +371,9 @@ static int __drm_universal_plane_init(struct drm_devi= ce *dev, > * drm_universal_plane_init() to let the DRM managed resource infrastruc= ture > * take care of cleanup and deallocation. > * > + * Drivers supporting modifiers must set @format_modifiers on all their = planes, > + * even those that only support DRM_FORMAT_MOD_LINEAR. Good. > + * > * Returns: > * Zero on success, error code on failure. > */ > diff --git a/include/drm/drm_mode_config.h b/include/drm/drm_mode_config.h > index ab424ddd7665..1ddf7783fdf7 100644 > --- a/include/drm/drm_mode_config.h > +++ b/include/drm/drm_mode_config.h > @@ -909,6 +909,8 @@ struct drm_mode_config { > * @allow_fb_modifiers: > * > * Whether the driver supports fb modifiers in the ADDFB2.1 ioctl call. > + * Note that drivers should not set this directly, it is automatically > + * set in drm_universal_plane_init(). > * > * IMPORTANT: > * Thanks, pq --Sig_/Jeo3XQlThZDgIRmrUjCVX6m Content-Type: application/pgp-signature Content-Description: OpenPGP digital signature -----BEGIN PGP SIGNATURE----- iQIzBAEBCAAdFiEEJQjwWQChkWOYOIONI1/ltBGqqqcFAmB1htIACgkQI1/ltBGq qqeHOQ/8Chckz7qKtENYTlTJ3xXUFDUT4E2yCfUfyLUoHHM/FalRemG14IIBcv4A uVt1c2wVc97uBR/YvTWK+zyIjmtJwH0G1ltn37b9c5veRv/dfFQdCzjZElkue1hk blGJ0TIvA7FaOlDeNTLv1VPnIUBzOPqXs9tQ66MTx2nMq+ZA2uWFzu/STRUcKTAm jj8+rfPMPrpyohYv3gk2u2RLt+vNN9v91zAA4bsxPDSD4DWUxSILZttDI/kklVAz v3P9q3QbCvTYKp1D+c/EWm3WcoPjXo9tAgdoHdMZZUwxMnI0hB4gHEEiA6rdzmB1 1JtoWIIo8tNJnLwNv4X9CAisM4hPg4TcOPmjJUuHnHTEN3A63UDX8QQTURvTeN4d eEY6yx+l8S+hkc64KXWv/VpEkRqCzhaaS+UufMtN2Or3MomqAamUGTbvlQs2QF+y PGZ6lEk+mH3aUB9W6mgqj0nbQYsuGUM1cLFKVW/rEjxPMs4vTiQS1jEgvW7P3RM9 JBIc0/9c73KJ/dgLtsH+S/Pb6oujalg7pAlgctO2yXr1XiFeiWliDyQ356echlcq Zla1Plx3txVXobqu13ubQ6bOuTfEXrVHbWddi8y2K76P7IA3Qc8XAYgnxJEEYNdg cWlvuQ0dvp6Uf5oFMXR2z8GGcvUtN1bOceSrrmZQu1W7WYOtlNU= =Nncx -----END PGP SIGNATURE----- --Sig_/Jeo3XQlThZDgIRmrUjCVX6m-- --===============0457246137== Content-Type: text/plain; charset="us-ascii" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit Content-Disposition: inline _______________________________________________ dri-devel mailing list dri-devel@lists.freedesktop.org https://lists.freedesktop.org/mailman/listinfo/dri-devel --===============0457246137==--