From patchwork Thu Jul 6 12:46:39 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13303662 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 bombadil.infradead.org (bombadil.infradead.org [198.137.202.133]) (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 9FCB8EB64DD for ; Thu, 6 Jul 2023 12:49:46 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender: Content-Transfer-Encoding:Content-Type:List-Subscribe:List-Help:List-Post: List-Archive:List-Unsubscribe:List-Id:MIME-Version:References:In-Reply-To: Message-ID:Date:Subject:Cc:To:From:Reply-To:Content-ID:Content-Description: Resent-Date:Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID: List-Owner; bh=XRqUJmOgeijLYY7GO33lUiuk1VZ+SSaEfmtLl6pOweM=; b=BCiA5+C4+NRszF Opw/IwllR0tNnviMMIOUfyXn3vrAdM/+n2/QItoh2ILJc0/x8yEZDSgkLIHX3gS1SZwWuP31tW0ga dnmN/y6wNgG3ab52+JlFpowNMQr7H4kqHkANu0o7Fyrgd6qM91Nd/xYEHvjuQ0qXwhuBRzvpL/vsS M1Uhh/K6d+mQj1rGnisLOBftKAKVUjc1GI+K/X3uo/iHWwA5Pol6zeK9qzd7l/7E8+2aU9Casc/C8 Nhg8l60NKu4u5e9yQSLFgtz7lX1Ngf7R461kD7x/yc4XTtHL9Qx4dNecSos4T7YIkVsny5Oa3IE8y 4G+Dh2SBY20NUkqyXnLA==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qHOQ6-001h0r-2v; Thu, 06 Jul 2023 12:49:14 +0000 Received: from smtp-out1.suse.de ([2001:67c:2178:6::1c]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qHOQ1-001gur-29 for linux-arm-kernel@lists.infradead.org; Thu, 06 Jul 2023 12:49:11 +0000 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 97ED022938; Thu, 6 Jul 2023 12:49:07 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_rsa; t=1688647747; 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=cKR3ZnbG7MMz5F4/vJcdpyoOxU6C2g5Dy4H9g3Ktz+0=; b=sXc4YA8u8aTqZndLL8hSvqvUD9NqGTTAKcn8jrziX34ylRUlfDprk0iEOcfflc3VUb3t5o AI3wtRG3kY7rzdEFm0bYJTpeLWz/ZIYpuBPkGiofOnG22tRHeTCvpdZCyE3oUmyfjbC3kA eV8byS/dEP6hz/rQVjRBIXKgK/jSrkM= DKIM-Signature: v=1; a=ed25519-sha256; c=relaxed/relaxed; d=suse.de; s=susede2_ed25519; t=1688647747; 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=cKR3ZnbG7MMz5F4/vJcdpyoOxU6C2g5Dy4H9g3Ktz+0=; b=3lacPbe3y9/72q/1mlWk1ASFMP6+e6rSoEwKwHycOsXsSnyeWKAanYjh3LCpJ5kyiVbbrM ZlTnLXRQ+w2S3JAw== 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 4FFAA138FC; Thu, 6 Jul 2023 12:49:07 +0000 (UTC) Received: from dovecot-director2.suse.de ([192.168.254.65]) by imap2.suse-dmz.suse.de with ESMTPSA id wHSfEkO4pmS7QgAAMHmgww (envelope-from ); Thu, 06 Jul 2023 12:49:07 +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 v2 01/11] fbdev: Add fb_ops init macros for framebuffers in DMA-able memory Date: Thu, 6 Jul 2023 14:46:39 +0200 Message-ID: <20230706124905.15134-2-tzimmermann@suse.de> X-Mailer: git-send-email 2.41.0 In-Reply-To: <20230706124905.15134-1-tzimmermann@suse.de> References: <20230706124905.15134-1-tzimmermann@suse.de> MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230706_054909_847610_28FB3991 X-CRM114-Status: GOOD ( 12.54 ) X-BeenThere: linux-arm-kernel@lists.infradead.org X-Mailman-Version: 2.1.34 Precedence: list List-Id: List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , Sender: "linux-arm-kernel" Errors-To: linux-arm-kernel-bounces+linux-arm-kernel=archiver.kernel.org@lists.infradead.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 Reviewed-by: Javier Martinez Canillas Acked-by: Maxime Ripard Cc: Helge Deller --- 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);