From patchwork Tue Jul 4 15:49:58 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13301437 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 vger.kernel.org (vger.kernel.org [23.128.96.18]) by smtp.lore.kernel.org (Postfix) with ESMTP id 94C14EB64DD for ; Tue, 4 Jul 2023 16:01:40 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S231382AbjGDQBj (ORCPT ); Tue, 4 Jul 2023 12:01:39 -0400 Received: from lindbergh.monkeyblade.net ([23.128.96.19]:56256 "EHLO lindbergh.monkeyblade.net" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230357AbjGDQBi (ORCPT ); Tue, 4 Jul 2023 12:01:38 -0400 Received: from smtp-out2.suse.de (smtp-out2.suse.de [IPv6:2001:67c:2178:6::1d]) by lindbergh.monkeyblade.net (Postfix) with ESMTPS id C7C6810D9; Tue, 4 Jul 2023 09:01:36 -0700 (PDT) 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-out2.suse.de (Postfix) with ESMTPS id 685F71FDCE; Tue, 4 Jul 2023 16:01:35 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1688486495; 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=9HNzFbkOxT3wYRs/yGJOSWV56VFROq6gaVSgPJPLezI=; b=CF/NsosiphT5TK8Gm/jnpeQW+5mJgGl2kBwo4m9jiUoqOtbGoCUfaTgU5P7OzFJ5evzkVX wiBTrnRuKz4CTqobiZHFNfKIBs0ALA3MBVkgGzYBaYtbxSoke/IRp0NC0Oj/Dn5yhEEtL4 pz0fmnzVXTVuyynR1RdYMHlQbC8a+c0= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1688486495; 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=9HNzFbkOxT3wYRs/yGJOSWV56VFROq6gaVSgPJPLezI=; b=VMsaooGl05z/fGaZ4w2m/1zddiga9OcnyIO0AhrgQW15PMrVEaMH/JhlC0FDqnkN5Z2gGR VaU9K7DdH0tvEgAg== 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 33522139ED; Tue, 4 Jul 2023 16:01:35 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id 6JOgC19CpGTzLwAAMHmgww (envelope-from ); Tue, 04 Jul 2023 16:01:35 +0000 From: Thomas Zimmermann To: javierm@redhat.com, maarten.lankhorst@linux.intel.com, mripard@kernel.org Cc: dri-devel@lists.freedesktop.org, linux-arm-kernel@lists.infradead.org, linux-samsung-soc@vger.kernel.org, linux-tegra@vger.kernel.org, linux-fbdev@vger.kernel.org, Thomas Zimmermann , Helge Deller Subject: [PATCH 01/10] fbdev: Add fb_ops init macros for framebuffers in DMA-able memory Date: Tue, 4 Jul 2023 17:49:58 +0200 Message-ID: <20230704160133.20261-2-tzimmermann@suse.de> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230704160133.20261-1-tzimmermann@suse.de> References: <20230704160133.20261-1-tzimmermann@suse.de> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-samsung-soc@vger.kernel.org Add initializer macros for struct fb_ops for framebuffers in DMA-able memory areas. Also add a corresponding Kconfig token. As of now, this is equivalent to system framebuffers and mostly useful for labeling drivers correctly. A later patch may add a generic DMA-specific mmap operation. Linux offers a number of dma_mmap_*() helpers for different use cases. Signed-off-by: Thomas Zimmermann Cc: Helge Deller Reviewed-by: Javier Martinez Canillas --- drivers/video/fbdev/Kconfig | 8 ++++++++ include/linux/fb.h | 13 +++++++++++++ 2 files changed, 21 insertions(+) diff --git a/drivers/video/fbdev/Kconfig b/drivers/video/fbdev/Kconfig index cecf15418632..f14229757311 100644 --- a/drivers/video/fbdev/Kconfig +++ b/drivers/video/fbdev/Kconfig @@ -168,6 +168,14 @@ config FB_DEFERRED_IO bool depends on FB +config FB_DMA_HELPERS + bool + depends on FB + select FB_SYS_COPYAREA + select FB_SYS_FILLRECT + select FB_SYS_FOPS + select FB_SYS_IMAGEBLIT + config FB_IO_HELPERS bool depends on FB diff --git a/include/linux/fb.h b/include/linux/fb.h index 1d5c13f34b09..1191a78c5289 100644 --- a/include/linux/fb.h +++ b/include/linux/fb.h @@ -594,6 +594,19 @@ extern ssize_t fb_sys_write(struct fb_info *info, const char __user *buf, __FB_DEFAULT_SYS_OPS_DRAW, \ __FB_DEFAULT_SYS_OPS_MMAP +/* + * Helpers for framebuffers in DMA-able memory + */ + +#define __FB_DEFAULT_DMA_OPS_RDWR \ + .fb_read = fb_sys_read, \ + .fb_write = fb_sys_write + +#define __FB_DEFAULT_DMA_OPS_DRAW \ + .fb_fillrect = sys_fillrect, \ + .fb_copyarea = sys_copyarea, \ + .fb_imageblit = sys_imageblit + /* drivers/video/fbmem.c */ extern int register_framebuffer(struct fb_info *fb_info); extern void unregister_framebuffer(struct fb_info *fb_info);