From patchwork Mon Sep 9 11:30:10 2024 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13796786 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 901FEECE57A for ; Mon, 9 Sep 2024 11:37:11 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id C75E410E3A8; Mon, 9 Sep 2024 11:36:43 +0000 (UTC) Authentication-Results: gabe.freedesktop.org; dkim=pass (1024-bit key; unprotected) header.d=suse.de header.i=@suse.de header.b="mpFw/IXb"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="tjkYEGEZ"; dkim=pass (1024-bit key) header.d=suse.de header.i=@suse.de header.b="mpFw/IXb"; dkim=permerror (0-bit key) header.d=suse.de header.i=@suse.de header.b="tjkYEGEZ"; 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 A601710E37F; Mon, 9 Sep 2024 11:36:40 +0000 (UTC) Received: from imap1.dmz-prg2.suse.org (unknown [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 62FCB1F7B8; Mon, 9 Sep 2024 11:36:39 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1725881799; 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=oceCeiostvNZ4W7QS+Ifw1ZYxgkQ+oQbWo3ZJh+DiSk=; b=mpFw/IXb0yvGbekR7QnAYCjYvHipq0fTTHbEr3srtmUJieDoV7nnAGHybVfGKKukVzoOxE naASpSndFX4JNyzUnvXp8I1LV6HyRDFzw9ddV0f01iuPiq5yTvOOaHi1Zv5iFVmRRkLMj+ 7bY0umpgEX++OQCz+uhr9HqjKsrugiY= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1725881799; 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=oceCeiostvNZ4W7QS+Ifw1ZYxgkQ+oQbWo3ZJh+DiSk=; b=tjkYEGEZE6t5qWTEikAKhVQ+C+3Z4aU1OXOURgFZ2NX78+MzRN3DGhZ+DayiOKfsxCr48x tGpHDd09D3A/UODA== Authentication-Results: smtp-out2.suse.de; none DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1725881799; 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=oceCeiostvNZ4W7QS+Ifw1ZYxgkQ+oQbWo3ZJh+DiSk=; b=mpFw/IXb0yvGbekR7QnAYCjYvHipq0fTTHbEr3srtmUJieDoV7nnAGHybVfGKKukVzoOxE naASpSndFX4JNyzUnvXp8I1LV6HyRDFzw9ddV0f01iuPiq5yTvOOaHi1Zv5iFVmRRkLMj+ 7bY0umpgEX++OQCz+uhr9HqjKsrugiY= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1725881799; 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=oceCeiostvNZ4W7QS+Ifw1ZYxgkQ+oQbWo3ZJh+DiSk=; b=tjkYEGEZE6t5qWTEikAKhVQ+C+3Z4aU1OXOURgFZ2NX78+MzRN3DGhZ+DayiOKfsxCr48x tGpHDd09D3A/UODA== 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 1E8D813312; Mon, 9 Sep 2024 11:36:39 +0000 (UTC) Received: from dovecot-director2.suse.de ([2a07:de40:b281:106:10:150:64:167]) by imap1.dmz-prg2.suse.org with ESMTPSA id kJw7Bsfd3malNAAAD6G6ig (envelope-from ); Mon, 09 Sep 2024 11:36:39 +0000 From: Thomas Zimmermann To: simona@ffwll.ch, airlied@gmail.com, jfalempe@redhat.com, javierm@redhat.com Cc: dri-devel@lists.freedesktop.org, amd-gfx@lists.freedesktop.org, intel-gfx@lists.freedesktop.org, nouveau@lists.freedesktop.org, Thomas Zimmermann , Laurent Pinchart Subject: [PATCH v4 04/80] drm: Add client-agnostic setup helper Date: Mon, 9 Sep 2024 13:30:10 +0200 Message-ID: <20240909113633.595465-5-tzimmermann@suse.de> X-Mailer: git-send-email 2.46.0 In-Reply-To: <20240909113633.595465-1-tzimmermann@suse.de> References: <20240909113633.595465-1-tzimmermann@suse.de> MIME-Version: 1.0 X-Spamd-Result: default: False [-1.30 / 50.00]; BAYES_HAM(-3.00)[100.00%]; SUSPICIOUS_RECIPS(1.50)[]; MID_CONTAINS_FROM(1.00)[]; NEURAL_HAM_LONG(-1.00)[-1.000]; R_MISSING_CHARSET(0.50)[]; NEURAL_HAM_SHORT(-0.20)[-1.000]; MIME_GOOD(-0.10)[text/plain]; DBL_BLOCKED_OPENRESOLVER(0.00)[suse.de:mid,suse.de:email]; FROM_HAS_DN(0.00)[]; TAGGED_RCPT(0.00)[renesas]; RCVD_VIA_SMTP_AUTH(0.00)[]; MIME_TRACE(0.00)[0:+]; ARC_NA(0.00)[]; FROM_EQ_ENVFROM(0.00)[]; FREEMAIL_TO(0.00)[ffwll.ch,gmail.com,redhat.com]; RCPT_COUNT_SEVEN(0.00)[10]; RCVD_COUNT_TWO(0.00)[2]; TO_MATCH_ENVRCPT_ALL(0.00)[]; RCVD_TLS_ALL(0.00)[]; FUZZY_BLOCKED(0.00)[rspamd.com]; TO_DN_SOME(0.00)[]; DKIM_SIGNED(0.00)[suse.de:s=susede2_rsa,suse.de:s=susede2_ed25519]; FREEMAIL_ENVRCPT(0.00)[gmail.com] 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" DRM may support multiple in-kernel clients that run as soon as a DRM driver has been registered. To select the client(s) in a single place, introduce drm_client_setup(). Drivers that call the new helper automatically instantiate the kernel's configured default clients. Only fbdev emulation is currently supported. Later versions can add support for DRM-based logging, a boot logo or even a console. Some drivers handle the color mode for clients internally. Provide the helper drm_client_setup_with_color_mode() for them. v4: - fix docs for drm_client_setup_with_fourcc() (Geert) v3: - fix build error v2: - add drm_client_setup_with_fourcc() (Laurent) - push default-format handling into actual clients Signed-off-by: Thomas Zimmermann Reviewed-by: Laurent Pinchart --- drivers/gpu/drm/Makefile | 1 + drivers/gpu/drm/drm_client_setup.c | 66 ++++++++++++++++++++++++++++++ include/drm/drm_client_setup.h | 15 +++++++ 3 files changed, 82 insertions(+) create mode 100644 drivers/gpu/drm/drm_client_setup.c create mode 100644 include/drm/drm_client_setup.h diff --git a/drivers/gpu/drm/Makefile b/drivers/gpu/drm/Makefile index d7a684ae6a59..c08f639f9550 100644 --- a/drivers/gpu/drm/Makefile +++ b/drivers/gpu/drm/Makefile @@ -129,6 +129,7 @@ obj-$(CONFIG_DRM_TTM_HELPER) += drm_ttm_helper.o drm_kms_helper-y := \ drm_atomic_helper.o \ drm_atomic_state_helper.o \ + drm_client_setup.o \ drm_crtc_helper.o \ drm_damage_helper.o \ drm_encoder_slave.o \ diff --git a/drivers/gpu/drm/drm_client_setup.c b/drivers/gpu/drm/drm_client_setup.c new file mode 100644 index 000000000000..5969c4ffe31b --- /dev/null +++ b/drivers/gpu/drm/drm_client_setup.c @@ -0,0 +1,66 @@ +// SPDX-License-Identifier: MIT + +#include +#include +#include +#include +#include + +/** + * drm_client_setup() - Setup in-kernel DRM clients + * @dev: DRM device + * @format: Preferred pixel format for the device. Use NULL, unless + * there is clearly a driver-preferred format. + * + * This function sets up the in-kernel DRM clients. Restore, hotplug + * events and teardown are all taken care of. + * + * Drivers should call drm_client_setup() after registering the new + * DRM device with drm_dev_register(). This function is safe to call + * even when there are no connectors present. Setup will be retried + * on the next hotplug event. + * + * The clients are destroyed by drm_dev_unregister(). + */ +void drm_client_setup(struct drm_device *dev, const struct drm_format_info *format) +{ + int ret; + + ret = drm_fbdev_client_setup(dev, format); + if (ret) + drm_warn(dev, "Failed to set up DRM client; error %d\n", ret); +} +EXPORT_SYMBOL(drm_client_setup); + +/** + * drm_client_setup_with_fourcc() - Setup in-kernel DRM clients for color mode + * @dev: DRM device + * @fourcc: Preferred pixel format as 4CC code for the device + * + * This function sets up the in-kernel DRM clients. It is equivalent + * to drm_client_setup(), but expects a 4CC code as second argument. + */ +void drm_client_setup_with_fourcc(struct drm_device *dev, u32 fourcc) +{ + drm_client_setup(dev, drm_format_info(fourcc)); +} +EXPORT_SYMBOL(drm_client_setup_with_fourcc); + +/** + * drm_client_setup_with_color_mode() - Setup in-kernel DRM clients for color mode + * @dev: DRM device + * @color_mode: Preferred color mode for the device + * + * This function sets up the in-kernel DRM clients. It is equivalent + * to drm_client_setup(), but expects a color mode as second argument. + * + * Do not use this function in new drivers. Prefer drm_client_setup() with a + * format of NULL. + */ +void drm_client_setup_with_color_mode(struct drm_device *dev, unsigned int color_mode) +{ + u32 fourcc = drm_driver_color_mode_format(dev, color_mode); + + drm_client_setup_with_fourcc(dev, fourcc); +} +EXPORT_SYMBOL(drm_client_setup_with_color_mode); diff --git a/include/drm/drm_client_setup.h b/include/drm/drm_client_setup.h new file mode 100644 index 000000000000..6c0396b4f815 --- /dev/null +++ b/include/drm/drm_client_setup.h @@ -0,0 +1,15 @@ +/* SPDX-License-Identifier: MIT */ + +#ifndef DRM_CLIENT_SETUP_H +#define DRM_CLIENT_SETUP_H + +#include + +struct drm_device; +struct drm_format_info; + +void drm_client_setup(struct drm_device *dev, const struct drm_format_info *format); +void drm_client_setup_with_fourcc(struct drm_device *dev, u32 fourcc); +void drm_client_setup_with_color_mode(struct drm_device *dev, unsigned int color_mode); + +#endif