From patchwork Thu Jul 6 12:46:38 2023 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Thomas Zimmermann X-Patchwork-Id: 13303660 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 D4C86EB64D9 for ; Thu, 6 Jul 2023 12:49:36 +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: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:In-Reply-To:References: List-Owner; bh=YVhNYBM8JMotZkpH5r9Q5apkKFG7BIlzqx9dliTkG2g=; b=drukUzUUPOdu0O 4UOlHBCx3RF2BQs/wpreEVRtzpndRw8h9YgWRZ5tSbvYFsnogJzgvHns666e5rKYtw9PXljDmAn4O fIBd0PozGq1cOP2ZL1YbukzgUanzZMfh4zl1Z8PMq513eobKur+pD/MO/i7/qWn7KS/sN8Hjazgwm t1szGAuRine+LTuPcxP6G4ZWjKQ5RFbNbiKBnSBoiUvJycVAfrdV6kI/VNwvZd4YXsSHswgj6PlOb OTFgJSG1uY+YNZ1MfzKyQdvg7P2Tli7MBdgRujHMM0TcrTLtcplyenzebEPZZ/ps603inCkezXy1F q65/ZtaGG7/Zrh/1mBfg==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.96 #2 (Red Hat Linux)) id 1qHOQ2-001gxB-2Z; Thu, 06 Jul 2023 12:49:10 +0000 Received: from smtp-out2.suse.de ([2001:67c:2178:6::1d]) by bombadil.infradead.org with esmtps (Exim 4.96 #2 (Red Hat Linux)) id 1qHOQ0-001gun-1n for linux-arm-kernel@lists.infradead.org; Thu, 06 Jul 2023 12:49:09 +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-out2.suse.de (Postfix) with ESMTPS id 49FC41FE7B; 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; bh=wg/jKgVOvScklcFceYa+q6oTO7GnzG6ukG3hy+E8U84=; b=ewxeSIsrzJdnad57RPZaRj6uX/zhKJ6VI5rR5wrTwxyqYdFmTAh+3rh1pglr/VHTVPxTur QWa7eB8P8PY/iX1G/rIGngDc9tuRICAXy1T1oHKqhNgJ46+1nAWfasvX6Y9BEWYiJF317j o3rZgXpZoZaYbUDgZdZjKKRiOhNkNDE= 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; bh=wg/jKgVOvScklcFceYa+q6oTO7GnzG6ukG3hy+E8U84=; b=Svbue0Y6YlEv97YJRY9vL11Vmf6g8HciT6eyRM0FYq+5MfU/3LaLF17vuRfUbH3brwJ4Qg yzc7JHeA9fHq5KAw== 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 161CD138FC; 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 nnx1BEO4pmS7QgAAMHmgww (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 Subject: [PATCH v2 00/11] drm: Improve fbdev emulation for DMA-able framebuffers Date: Thu, 6 Jul 2023 14:46:38 +0200 Message-ID: <20230706124905.15134-1-tzimmermann@suse.de> X-Mailer: git-send-email 2.41.0 MIME-Version: 1.0 X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20230706_054908_745352_FD3BD611 X-CRM114-Status: GOOD ( 11.36 ) 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 fbdev helpers for framebuffers in DMA-able memory and update fbdev emulation in the respective DRM drivers. DMA memory used to handled as system memory. Improve this and prepare for possible future changes. Patch 1 adds initializer macros for struct fb_ops and a Kconfig token for framebuffers in DMA memory. Patches 2 to 4 update fbdev-dma and tegra. No functional changes are expected as both used system memory before. Patches 5 and 6 update exynos to use DMA helpers. Exynos incorrectly used fbdev's I/O-memory helpers. Fix this. Patches 7 to 9 update omapdrm to use DMA helpers. Patch 7 first reworks the driver's mmap to current best practices. This also makes it suitable for use with fbdev, which patches 8 and 9 implement. Patchies 10 removes some fbdev macros for system memory that are now unused; patch 11 fixes some comments. The patchset would ideally go through drm-misc-next. Future patches can build upon it and update fbdev drivers in similar ways. v2: * fix omap mmap flags * drop FBINFO_DEFAULT from patches * minor cleanups Thomas Zimmermann (11): fbdev: Add fb_ops init macros for framebuffers in DMA-able memory drm/fbdev-dma: Use fbdev DMA helpers drm/tegra: Use fbdev DMA helpers drm/tegra: Set fbdev FBINFO_VIRTFB flag drm/exynos: Use fbdev DMA helpers drm/exynos: Set fbdev FBINFO_VIRTFB flag drm/omapdrm: Set VM flags in GEM-object mmap function drm/omapdrm: Use GEM mmap for fbdev emulation drm/omapdrm: Set fbdev FBINFO_VIRTFB flag fbdev: Remove FB_DEFAULT_SYS_OPS fbdev: Harmonize some comments in drivers/gpu/drm/Kconfig | 2 +- drivers/gpu/drm/drm_fbdev_dma.c | 4 ++-- drivers/gpu/drm/exynos/Kconfig | 2 +- drivers/gpu/drm/exynos/exynos_drm_fbdev.c | 5 ++-- drivers/gpu/drm/omapdrm/Kconfig | 2 +- drivers/gpu/drm/omapdrm/omap_drv.c | 12 +--------- drivers/gpu/drm/omapdrm/omap_fbdev.c | 16 +++++++++++-- drivers/gpu/drm/omapdrm/omap_gem.c | 24 +++++-------------- drivers/gpu/drm/omapdrm/omap_gem.h | 3 --- drivers/gpu/drm/omapdrm/omap_gem_dmabuf.c | 7 +----- drivers/gpu/drm/tegra/Kconfig | 2 +- drivers/gpu/drm/tegra/fbdev.c | 5 ++-- drivers/video/fbdev/Kconfig | 8 +++++++ include/linux/fb.h | 29 ++++++++++------------- 14 files changed, 55 insertions(+), 66 deletions(-)