From patchwork Tue Dec 7 10:27:48 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tommy Huang X-Patchwork-Id: 12661553 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 8A287C4332F for ; Tue, 7 Dec 2021 10:28:41 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id A21CBEAA2E; Tue, 7 Dec 2021 10:28:40 +0000 (UTC) Received: from twspam01.aspeedtech.com (twspam01.aspeedtech.com [211.20.114.71]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2036DEAA28 for ; Tue, 7 Dec 2021 10:28:38 +0000 (UTC) Received: from mail.aspeedtech.com ([192.168.0.24]) by twspam01.aspeedtech.com with ESMTP id 1B7A33lY003134; Tue, 7 Dec 2021 18:03:03 +0800 (GMT-8) (envelope-from tommy_huang@aspeedtech.com) Received: from tommy0527-VirtualBox.aspeedtech.com (192.168.2.141) by TWMBX02.aspeed.com (192.168.0.24) with Microsoft SMTP Server (TLS) id 15.0.1497.2; Tue, 7 Dec 2021 18:27:59 +0800 From: Tommy Haung To: , , , , , , , , , Subject: [PATCH v4 5/6] drm/aspeed: Add reset and clock for AST2600 Date: Tue, 7 Dec 2021 18:27:48 +0800 Message-ID: <20211207102749.18118-7-tommy_huang@aspeedtech.com> X-Mailer: git-send-email 2.17.1 In-Reply-To: <20211207102749.18118-1-tommy_huang@aspeedtech.com> References: <20211207102749.18118-1-tommy_huang@aspeedtech.com> MIME-Version: 1.0 X-Originating-IP: [192.168.2.141] X-ClientProxiedBy: TWMBX02.aspeed.com (192.168.0.24) To TWMBX02.aspeed.com (192.168.0.24) X-DNSRBL: X-MAIL: twspam01.aspeedtech.com 1B7A33lY003134 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: BMC-SW@aspeedtech.com, tommy-huang Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" From: tommy-huang Add more reset and clock select code for AST2600. The gfx_flags parameter was added for chip caps idenified. Signed-off-by: tommy-huang --- drivers/gpu/drm/aspeed/aspeed_gfx.h | 16 +++++++- drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c | 16 ++++++++ drivers/gpu/drm/aspeed/aspeed_gfx_drv.c | 50 ++++++++++++++++++++++-- 3 files changed, 77 insertions(+), 5 deletions(-) diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx.h b/drivers/gpu/drm/aspeed/aspeed_gfx.h index 4e6a442c3886..2c733225d3c7 100644 --- a/drivers/gpu/drm/aspeed/aspeed_gfx.h +++ b/drivers/gpu/drm/aspeed/aspeed_gfx.h @@ -8,7 +8,8 @@ struct aspeed_gfx { struct drm_device drm; void __iomem *base; struct clk *clk; - struct reset_control *rst; + struct reset_control *rst_crt; + struct reset_control *rst_engine; struct regmap *scu; u32 dac_reg; @@ -16,6 +17,7 @@ struct aspeed_gfx { u32 vga_scratch_reg; u32 throd_val; u32 scan_line_max; + u32 flags; struct drm_simple_display_pipe pipe; struct drm_connector connector; @@ -106,3 +108,15 @@ int aspeed_gfx_create_output(struct drm_device *drm); /* CRT_THROD */ #define CRT_THROD_LOW(x) (x) #define CRT_THROD_HIGH(x) ((x) << 8) + +/* SCU control */ +#define SCU_G6_CLK_COURCE 0x300 + +/* GFX FLAGS */ +#define RESET_MASK BIT(0) +#define RESET_G6 BIT(0) +#define CLK_MASK BIT(4) +#define CLK_G6 BIT(4) + +#define G6_CLK_MASK (BIT(8) | BIT(9) | BIT(10)) +#define G6_USB_40_CLK BIT(9) diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c b/drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c index 827e62c1daba..e0975ecda92d 100644 --- a/drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_crtc.c @@ -77,6 +77,18 @@ static void aspeed_gfx_disable_controller(struct aspeed_gfx *priv) regmap_update_bits(priv->scu, priv->dac_reg, BIT(16), 0); } +static void aspeed_gfx_set_clk(struct aspeed_gfx *priv) +{ + switch (priv->flags & CLK_MASK) { + case CLK_G6: + regmap_update_bits(priv->scu, SCU_G6_CLK_COURCE, G6_CLK_MASK, 0x0); + regmap_update_bits(priv->scu, SCU_G6_CLK_COURCE, G6_CLK_MASK, G6_USB_40_CLK); + break; + default: + break; + } +} + static void aspeed_gfx_crtc_mode_set_nofb(struct aspeed_gfx *priv) { struct drm_display_mode *m = &priv->pipe.crtc.state->adjusted_mode; @@ -87,6 +99,8 @@ static void aspeed_gfx_crtc_mode_set_nofb(struct aspeed_gfx *priv) if (err) return; + aspeed_gfx_set_clk(priv); + #if 0 /* TODO: we have only been able to test with the 40MHz USB clock. The * clock is fixed, so we cannot adjust it here. */ @@ -193,6 +207,7 @@ static void aspeed_gfx_pipe_update(struct drm_simple_display_pipe *pipe, static int aspeed_gfx_enable_vblank(struct drm_simple_display_pipe *pipe) { struct aspeed_gfx *priv = drm_pipe_to_aspeed_gfx(pipe); + u32 reg = readl(priv->base + CRT_CTRL1); /* Clear pending VBLANK IRQ */ @@ -207,6 +222,7 @@ static int aspeed_gfx_enable_vblank(struct drm_simple_display_pipe *pipe) static void aspeed_gfx_disable_vblank(struct drm_simple_display_pipe *pipe) { struct aspeed_gfx *priv = drm_pipe_to_aspeed_gfx(pipe); + u32 reg = readl(priv->base + CRT_CTRL1); reg &= ~CRT_CTRL_VERTICAL_INTR_EN; diff --git a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c index d10246b1d1c2..59a0de92650f 100644 --- a/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c +++ b/drivers/gpu/drm/aspeed/aspeed_gfx_drv.c @@ -64,6 +64,7 @@ struct aspeed_gfx_config { u32 vga_scratch_reg; /* VGA scratch register in SCU */ u32 throd_val; /* Default Threshold Seting */ u32 scan_line_max; /* Max memory size of one scan line */ + u32 gfx_flags; /* Flags for gfx chip caps */ }; static const struct aspeed_gfx_config ast2400_config = { @@ -72,6 +73,7 @@ static const struct aspeed_gfx_config ast2400_config = { .vga_scratch_reg = 0x50, .throd_val = CRT_THROD_LOW(0x1e) | CRT_THROD_HIGH(0x12), .scan_line_max = 64, + .gfx_flags = 0, }; static const struct aspeed_gfx_config ast2500_config = { @@ -80,6 +82,7 @@ static const struct aspeed_gfx_config ast2500_config = { .vga_scratch_reg = 0x50, .throd_val = CRT_THROD_LOW(0x24) | CRT_THROD_HIGH(0x3c), .scan_line_max = 128, + .gfx_flags = 0, }; static const struct aspeed_gfx_config ast2600_config = { @@ -88,6 +91,7 @@ static const struct aspeed_gfx_config ast2600_config = { .vga_scratch_reg = 0x50, .throd_val = CRT_THROD_LOW(0x50) | CRT_THROD_HIGH(0x70), .scan_line_max = 128, + .gfx_flags = RESET_G6 | CLK_G6, }; static const struct of_device_id aspeed_gfx_match[] = { @@ -138,6 +142,44 @@ static irqreturn_t aspeed_gfx_irq_handler(int irq, void *data) return IRQ_NONE; } +static int aspeed_gfx_reset(struct drm_device *drm) +{ + struct platform_device *pdev = to_platform_device(drm->dev); + struct aspeed_gfx *priv = to_aspeed_gfx(drm); + + switch (priv->flags & RESET_MASK) { + case RESET_G6: + priv->rst_crt = devm_reset_control_get(&pdev->dev, "crt"); + if (IS_ERR(priv->rst_crt)) { + dev_err(&pdev->dev, + "missing or invalid crt reset controller device tree entry"); + return PTR_ERR(priv->rst_crt); + } + reset_control_deassert(priv->rst_crt); + + priv->rst_engine = devm_reset_control_get(&pdev->dev, "engine"); + if (IS_ERR(priv->rst_engine)) { + dev_err(&pdev->dev, + "missing or invalid engine reset controller device tree entry"); + return PTR_ERR(priv->rst_engine); + } + reset_control_deassert(priv->rst_engine); + break; + + default: + priv->rst_crt = devm_reset_control_get_exclusive(&pdev->dev, NULL); + if (IS_ERR(priv->rst_crt)) { + dev_err(&pdev->dev, + "missing or invalid reset controller device tree entry"); + return PTR_ERR(priv->rst_crt); + } + reset_control_deassert(priv->rst_crt); + break; + } + + return 0; +} + static int aspeed_gfx_load(struct drm_device *drm) { struct platform_device *pdev = to_platform_device(drm->dev); @@ -163,6 +205,7 @@ static int aspeed_gfx_load(struct drm_device *drm) priv->vga_scratch_reg = config->vga_scratch_reg; priv->throd_val = config->throd_val; priv->scan_line_max = config->scan_line_max; + priv->flags = config->gfx_flags; priv->scu = syscon_regmap_lookup_by_phandle(np, "syscon"); if (IS_ERR(priv->scu)) { @@ -186,13 +229,12 @@ static int aspeed_gfx_load(struct drm_device *drm) return ret; } - priv->rst = devm_reset_control_get_exclusive(&pdev->dev, NULL); - if (IS_ERR(priv->rst)) { + ret = aspeed_gfx_reset(drm); + if (ret) { dev_err(&pdev->dev, "missing or invalid reset controller device tree entry"); - return PTR_ERR(priv->rst); + return ret; } - reset_control_deassert(priv->rst); priv->clk = devm_clk_get(drm->dev, NULL); if (IS_ERR(priv->clk)) {