From patchwork Tue Jan 12 07:58:11 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: KuoHsiang Chou X-Patchwork-Id: 12012687 Return-Path: X-Spam-Checker-Version: SpamAssassin 3.4.0 (2014-02-07) on aws-us-west-2-korg-lkml-1.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-16.8 required=3.0 tests=BAYES_00, HEADER_FROM_DIFFERENT_DOMAINS,INCLUDES_CR_TRAILER,INCLUDES_PATCH, MAILING_LIST_MULTI,SPF_HELO_NONE,SPF_PASS,URIBL_BLOCKED,USER_AGENT_GIT autolearn=ham autolearn_force=no version=3.4.0 Received: from mail.kernel.org (mail.kernel.org [198.145.29.99]) by smtp.lore.kernel.org (Postfix) with ESMTP id 8508DC433DB for ; Tue, 12 Jan 2021 07:58:33 +0000 (UTC) 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 mail.kernel.org (Postfix) with ESMTPS id D6C0922E01 for ; Tue, 12 Jan 2021 07:58:32 +0000 (UTC) DMARC-Filter: OpenDMARC Filter v1.3.2 mail.kernel.org D6C0922E01 Authentication-Results: mail.kernel.org; dmarc=none (p=none dis=none) header.from=aspeedtech.com Authentication-Results: mail.kernel.org; spf=none smtp.mailfrom=dri-devel-bounces@lists.freedesktop.org Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 256526E0D8; Tue, 12 Jan 2021 07:58:32 +0000 (UTC) Received: from twspam01.aspeedtech.com (twspam01.aspeedtech.com [211.20.114.71]) by gabe.freedesktop.org (Postfix) with ESMTPS id C90416E0D8 for ; Tue, 12 Jan 2021 07:58:30 +0000 (UTC) Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 10C7rL15067704; Tue, 12 Jan 2021 15:53:21 +0800 (GMT-8) (envelope-from kuohsiang_chou@aspeedtech.com) Received: from localhost.localdomain.com (192.168.2.206) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 12 Jan 2021 15:58:18 +0800 From: KuoHsiang Chou To: , , Subject: [PATCH v2] drm/ast: Disable fast reset after DRAM initial Date: Tue, 12 Jan 2021 15:58:11 +0800 Message-ID: <20210112075811.9354-1-kuohsiang_chou@aspeedtech.com> X-Mailer: git-send-email 2.18.4 In-Reply-To: <88f197b6-4df8-76ca-ec31-7f8f739f161e@suse.de> References: <88f197b6-4df8-76ca-ec31-7f8f739f161e@suse.de> MIME-Version: 1.0 X-Originating-IP: [192.168.2.206] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 10C7rL15067704 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: airlied@linux.ie, tommy_huang@aspeedtech.com, jenmin_yuan@aspeedtech.com, airlied@redhat.com, arc_sung@aspeedtech.com Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" [Bug][AST2500] V1: When AST2500 acts as stand-alone VGA so that DRAM and DVO initialization have to be achieved by VGA driver with P2A (PCI to AHB) enabling. However, HW suggests disable Fast reset mode after DRAM initializaton, because fast reset mode is mainly designed for ARM ICE debugger. Once Fast reset is checked as enabling, WDT (Watch Dog Timer) should be first enabled to avoid system deadlock before disable fast reset mode. V2: Use to_pci_dev() to get revision of PCI configuration. Signed-off-by: KuoHsiang Chou --- drivers/gpu/drm/ast/ast_drv.h | 1 + drivers/gpu/drm/ast/ast_main.c | 5 +++ drivers/gpu/drm/ast/ast_post.c | 71 +++++++++++++++++++++------------- 3 files changed, 51 insertions(+), 26 deletions(-) -- 2.18.4 diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h index da6dfb677540..a2cf5fef2399 100644 --- a/drivers/gpu/drm/ast/ast_drv.h +++ b/drivers/gpu/drm/ast/ast_drv.h @@ -320,6 +320,7 @@ bool ast_is_vga_enabled(struct drm_device *dev); void ast_post_gpu(struct drm_device *dev); u32 ast_mindwm(struct ast_private *ast, u32 r); void ast_moutdwm(struct ast_private *ast, u32 r, u32 v); +void ast_patch_ahb_2500(struct ast_private *ast); /* ast dp501 */ void ast_set_dp501_video_output(struct drm_device *dev, u8 mode); bool ast_backup_fw(struct drm_device *dev, u8 *addr, u32 size); diff --git a/drivers/gpu/drm/ast/ast_main.c b/drivers/gpu/drm/ast/ast_main.c index 3775fe26f792..0e4dfcc25623 100644 --- a/drivers/gpu/drm/ast/ast_main.c +++ b/drivers/gpu/drm/ast/ast_main.c @@ -69,6 +69,7 @@ static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev) { struct device_node *np = dev->pdev->dev.of_node; struct ast_private *ast = to_ast_private(dev); + struct pci_dev *pdev = to_pci_dev(dev->dev); uint32_t data, jregd0, jregd1; /* Defaults */ @@ -96,6 +97,10 @@ static void ast_detect_config_mode(struct drm_device *dev, u32 *scu_rev) jregd0 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); jregd1 = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd1, 0xff); if (!(jregd0 & 0x80) || !(jregd1 & 0x10)) { + /* Patch AST2500 */ + if (((pdev->revision & 0xF0) == 0x40) && ((jregd0 & 0xC0) == 0)) + ast_patch_ahb_2500(ast); + /* Double check it's actually working */ data = ast_read32(ast, 0xf004); if (data != 0xFFFFFFFF) { diff --git a/drivers/gpu/drm/ast/ast_post.c b/drivers/gpu/drm/ast/ast_post.c index 8902c2f84bf9..1f0007daa005 100644 --- a/drivers/gpu/drm/ast/ast_post.c +++ b/drivers/gpu/drm/ast/ast_post.c @@ -2026,6 +2026,33 @@ static bool ast_dram_init_2500(struct ast_private *ast) return true; } +void ast_patch_ahb_2500(struct ast_private *ast) +{ + u32 data; + +patch_ahb_lock: + /* Clear bus lock condition */ + ast_moutdwm(ast, 0x1e600000, 0xAEED1A03); + ast_moutdwm(ast, 0x1e600084, 0x00010000); + ast_moutdwm(ast, 0x1e600088, 0x00000000); + ast_moutdwm(ast, 0x1e6e2000, 0x1688A8A8); + data = ast_mindwm(ast, 0x1e6e2070); + if (data & 0x08000000) { /* check fast reset */ + + ast_moutdwm(ast, 0x1E785004, 0x00000010); + ast_moutdwm(ast, 0x1E785008, 0x00004755); + ast_moutdwm(ast, 0x1E78500c, 0x00000033); + udelay(1000); + } + ast_moutdwm(ast, 0x1e6e2000, 0x1688A8A8); + do { + data = ast_mindwm(ast, 0x1e6e2000); + if (data == 0xffffffff) + goto patch_ahb_lock; + } while (data != 1); + ast_moutdwm(ast, 0x1e6e207c, 0x08000000); /* clear fast reset */ +} + void ast_post_chip_2500(struct drm_device *dev) { struct ast_private *ast = to_ast_private(dev); @@ -2033,39 +2060,31 @@ void ast_post_chip_2500(struct drm_device *dev) u8 reg; reg = ast_get_index_reg_mask(ast, AST_IO_CRTC_PORT, 0xd0, 0xff); - if ((reg & 0x80) == 0) {/* vga only */ + if ((reg & 0xC0) == 0) {/* vga only */ /* Clear bus lock condition */ - ast_moutdwm(ast, 0x1e600000, 0xAEED1A03); - ast_moutdwm(ast, 0x1e600084, 0x00010000); - ast_moutdwm(ast, 0x1e600088, 0x00000000); - ast_moutdwm(ast, 0x1e6e2000, 0x1688A8A8); - ast_write32(ast, 0xf004, 0x1e6e0000); - ast_write32(ast, 0xf000, 0x1); - ast_write32(ast, 0x12000, 0x1688a8a8); - while (ast_read32(ast, 0x12000) != 0x1) - ; - - ast_write32(ast, 0x10000, 0xfc600309); - while (ast_read32(ast, 0x10000) != 0x1) - ; + ast_patch_ahb_2500(ast); + + /* Disable watchdog */ + ast_moutdwm(ast, 0x1E78502C, 0x00000000); + ast_moutdwm(ast, 0x1E78504C, 0x00000000); + /* Reset USB port */ + ast_moutdwm(ast, 0x1E6E2090, 0x20000000); + ast_moutdwm(ast, 0x1E6E2094, 0x00004000); + if (ast_mindwm(ast, 0x1E6E2070) & 0x00800000) { + ast_moutdwm(ast, 0x1E6E207C, 0x00800000); + mdelay(100); + ast_moutdwm(ast, 0x1E6E2070, 0x00800000); + } + /* Modify eSPI reset pin */ + temp = ast_mindwm(ast, 0x1E6E2070); + if (temp & 0x02000000) + ast_moutdwm(ast, 0x1E6E207C, 0x00004000); /* Slow down CPU/AHB CLK in VGA only mode */ temp = ast_read32(ast, 0x12008); temp |= 0x73; ast_write32(ast, 0x12008, temp); - /* Reset USB port to patch USB unknown device issue */ - ast_moutdwm(ast, 0x1e6e2090, 0x20000000); - temp = ast_mindwm(ast, 0x1e6e2094); - temp |= 0x00004000; - ast_moutdwm(ast, 0x1e6e2094, temp); - temp = ast_mindwm(ast, 0x1e6e2070); - if (temp & 0x00800000) { - ast_moutdwm(ast, 0x1e6e207c, 0x00800000); - mdelay(100); - ast_moutdwm(ast, 0x1e6e2070, 0x00800000); - } - if (!ast_dram_init_2500(ast)) drm_err(dev, "DRAM init failed !\n");