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 2B585E95A95 for ; Mon, 9 Oct 2023 14:10:45 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 0C1CA10E26D; Mon, 9 Oct 2023 14:10:26 +0000 (UTC) Received: from smtp-out1.suse.de (smtp-out1.suse.de [IPv6:2001:67c:2178:6::1c]) by gabe.freedesktop.org (Postfix) with ESMTPS id 99E5F10E265 for ; Mon, 9 Oct 2023 14:10:23 +0000 (UTC) Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by smtp-out1.suse.de (Postfix) with ESMTPS id 41AD22188D; Mon, 9 Oct 2023 14:10:22 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1696860622; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=p6qU/RZfeODdKbKMtdKrjUs9wmoD+SKcUNPBXoasqQQ=; b=vKIiGRIh9F+FJX/ZRTSyRTC0Y90GeaEyLBdG/K6OLdVTUJTtS7IkzestVrJ2NItH5r4Qya 8aXxx21ivToRiBRCFpUSd6hR0QuK8dF8c3nqLe8uomsskHVG9ODIwyhEwPzxVTPy4YW9zI +r2+TMd1/rDUG+p9p9oUAebS3mqia9s= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1696860622; h=from:from:reply-to:date:date:message-id:message-id:to:to:cc:cc: mime-version:mime-version: content-transfer-encoding:content-transfer-encoding: in-reply-to:in-reply-to:references:references; bh=p6qU/RZfeODdKbKMtdKrjUs9wmoD+SKcUNPBXoasqQQ=; b=7OefriUV70Ko3BbvogkArZI6rfoFBTnSfht/LOTnf0PhQo0y1mD0TyvP1D+a7h5rzNIgos Ei7i5uvgqH3f3fAw== Received: from imap2.suse-dmz.suse.de (imap2.suse-dmz.suse.de [192.168.254.74]) (using TLSv1.3 with cipher TLS_AES_256_GCM_SHA384 (256/256 bits) key-exchange X25519 server-signature ECDSA (P-521) server-digest SHA512) (No client certificate requested) by imap2.suse-dmz.suse.de (Postfix) with ESMTPS id 099C013905; Mon, 9 Oct 2023 14:10:22 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id +H5pAc4JJGXaBAAAMHmgww (envelope-from ); Mon, 09 Oct 2023 14:10:22 +0000 From: Thomas Zimmermann To: javierm@redhat.com, jfalempe@redhat.com, jose.exposito89@gmail.com, arthurgrillo@riseup.net, mairacanal@riseup.net, maarten.lankhorst@linux.intel.com, mripard@kernel.org, airlied@gmail.com, daniel@ffwll.ch, noralf@tronnes.org Subject: [PATCH v5 5/7] drm/simpledrm: Preallocate format-conversion buffer in atomic_check Date: Mon, 9 Oct 2023 16:06:34 +0200 Message-ID: <20231009141018.11291-6-tzimmermann@suse.de> X-Mailer: git-send-email 2.42.0 In-Reply-To: <20231009141018.11291-1-tzimmermann@suse.de> References: <20231009141018.11291-1-tzimmermann@suse.de> MIME-Version: 1.0 Content-Transfer-Encoding: 8bit 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: Thomas Zimmermann , dri-devel@lists.freedesktop.org Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" Preallocate the format-conversion state's storage in the plane's atomic_check function if a format conversion is necessary. Allows the update to fail if no memory is available. Avoids the same allocation within atomic_update, which may not fail. Also inline drm_plane_helper_atomic_check() into the driver and thus return early for invisible planes. Avoids memory allocation entirely in this case. Signed-off-by: Thomas Zimmermann Reviewed-by: Javier Martinez Canillas --- drivers/gpu/drm/tiny/simpledrm.c | 41 +++++++++++++++++++++++++++++++- 1 file changed, 40 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/tiny/simpledrm.c b/drivers/gpu/drm/tiny/simpledrm.c index 6788f465995b3..d2280c81cbaae 100644 --- a/drivers/gpu/drm/tiny/simpledrm.c +++ b/drivers/gpu/drm/tiny/simpledrm.c @@ -19,6 +19,7 @@ #include #include #include +#include #include #include #include @@ -579,6 +580,44 @@ static const uint64_t simpledrm_primary_plane_format_modifiers[] = { DRM_FORMAT_MOD_INVALID }; +static int simpledrm_primary_plane_helper_atomic_check(struct drm_plane *plane, + struct drm_atomic_state *state) +{ + struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state, plane); + struct drm_shadow_plane_state *new_shadow_plane_state = + to_drm_shadow_plane_state(new_plane_state); + struct drm_framebuffer *new_fb = new_plane_state->fb; + struct drm_crtc *new_crtc = new_plane_state->crtc; + struct drm_crtc_state *new_crtc_state = NULL; + struct drm_device *dev = plane->dev; + struct simpledrm_device *sdev = simpledrm_device_of_dev(dev); + int ret; + + if (new_crtc) + new_crtc_state = drm_atomic_get_new_crtc_state(state, new_crtc); + + ret = drm_atomic_helper_check_plane_state(new_plane_state, new_crtc_state, + DRM_PLANE_NO_SCALING, + DRM_PLANE_NO_SCALING, + false, false); + if (ret) + return ret; + else if (!new_plane_state->visible) + return 0; + + if (new_fb->format != sdev->format) { + void *buf; + + /* format conversion necessary; reserve buffer */ + buf = drm_format_conv_state_reserve(&new_shadow_plane_state->fmtcnv_state, + sdev->pitch, GFP_KERNEL); + if (!buf) + return -ENOMEM; + } + + return 0; +} + static void simpledrm_primary_plane_helper_atomic_update(struct drm_plane *plane, struct drm_atomic_state *state) { @@ -635,7 +674,7 @@ static void simpledrm_primary_plane_helper_atomic_disable(struct drm_plane *plan static const struct drm_plane_helper_funcs simpledrm_primary_plane_helper_funcs = { DRM_GEM_SHADOW_PLANE_HELPER_FUNCS, - .atomic_check = drm_plane_helper_atomic_check, + .atomic_check = simpledrm_primary_plane_helper_atomic_check, .atomic_update = simpledrm_primary_plane_helper_atomic_update, .atomic_disable = simpledrm_primary_plane_helper_atomic_disable, }; -- 2.42.0