From mboxrd@z Thu Jan 1 00:00:00 1970 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 90330C369D3 for ; Mon, 21 Apr 2025 21:53:09 +0000 (UTC) DKIM-Signature: v=1; a=rsa-sha256; q=dns/txt; c=relaxed/relaxed; d=lists.infradead.org; s=bombadil.20210309; h=Sender:List-Subscribe:List-Help :List-Post:List-Archive:List-Unsubscribe:List-Id:In-Reply-To:Content-Type: MIME-Version:References:Message-ID:Subject:Cc:To:From:Date:Reply-To: Content-Transfer-Encoding:Content-ID:Content-Description:Resent-Date: Resent-From:Resent-Sender:Resent-To:Resent-Cc:Resent-Message-ID:List-Owner; bh=ts8BkD5f4yGedC++cJoZGfwHNcxsOssCtYtDkAppaig=; b=Pp45eFw33iU/WMGdXuK9WlVCrw hG8syzTYeYhy6BuTDsqWMlcAZpIpL2h9XgdSlHy+iQEUXEefi9ybJ1JlAwCLare692RrPJaiwp6CQ T3+dkQ+/yhYyGLFLwxjMVQMougAgzBedfaf1lFty3szhZgr8TJrm5rTUFIV+xMIEBMorbauLmG8IT C5/G2uB9ivU9/8wADyIYyqqict9QS5QesDK2KBXPoTl+AULZXdFKdXUAP6zajmnyP9jmwYEiMhGVL 0JEHh2lMSdvX9Gq1qGQAqfQLX5jtJkNzJTSY1G7FW5+CJF4ualyqAVFAOfLxHXj5znQB3oOt30S9s Z8tE7nqQ==; Received: from localhost ([::1] helo=bombadil.infradead.org) by bombadil.infradead.org with esmtp (Exim 4.98.2 #2 (Red Hat Linux)) id 1u6z4W-00000005F2Z-3Jp9; Mon, 21 Apr 2025 21:53:00 +0000 Received: from perceval.ideasonboard.com ([213.167.242.64]) by bombadil.infradead.org with esmtps (Exim 4.98.2 #2 (Red Hat Linux)) id 1u6ytP-00000005CYS-1roq for linux-arm-kernel@lists.infradead.org; Mon, 21 Apr 2025 21:41:32 +0000 Received: from pendragon.ideasonboard.com (81-175-209-231.bb.dnainternet.fi [81.175.209.231]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 439426D6; Mon, 21 Apr 2025 23:39:23 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1745271563; bh=ngbOkPt44/5lw29YiWRn3ahAnnvgeNx9uKhvIob9OW0=; h=Date:From:To:Cc:Subject:References:In-Reply-To:From; b=YsJXTjO7jyrXG2ntRWEgm8DS3eQK5PNbbQSQvl0CioGBsYAARezH/bJNWZJOHxF+k 0a1zIMuFlBxzlodxTclryAlgbzhP+0vxh0F8H6Dl3HnDGnPCP93x8XhzP6eG6dqyU1 kwukkO79y5qAhhS7kLZptWvySWOX5qZpgrvZaGUw= Date: Tue, 22 Apr 2025 00:41:28 +0300 From: Laurent Pinchart To: Frank Li Cc: Mauro Carvalho Chehab , Rob Herring , Krzysztof Kozlowski , Conor Dooley , Shawn Guo , Sascha Hauer , Pengutronix Kernel Team , Fabio Estevam , Rui Miguel Silva , Martin Kepplinger , Purism Kernel Team , linux-media@vger.kernel.org, devicetree@vger.kernel.org, imx@lists.linux.dev, linux-arm-kernel@lists.infradead.org, linux-kernel@vger.kernel.org, Robert Chiras , "Guoniu.zhou" Subject: Re: [PATCH v4 10/13] media: imx8mq-mipi-csi2: Add support for i.MX8QXP Message-ID: <20250421214128.GR17813@pendragon.ideasonboard.com> References: <20250408-8qxp_camera-v4-0-ef695f1b47c4@nxp.com> <20250408-8qxp_camera-v4-10-ef695f1b47c4@nxp.com> MIME-Version: 1.0 Content-Type: text/plain; charset=utf-8 Content-Disposition: inline In-Reply-To: <20250408-8qxp_camera-v4-10-ef695f1b47c4@nxp.com> X-CRM114-Version: 20100106-BlameMichelson ( TRE 0.8.0 (BSD) ) MR-646709E3 X-CRM114-CacheID: sfid-20250421_144131_628643_CD4346A1 X-CRM114-Status: GOOD ( 30.49 ) 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 Hi Frank, Thank you for the patch. On Tue, Apr 08, 2025 at 05:53:08PM -0400, Frank Li wrote: > Add support for i.MX8QXP, which has a dedicated control and status register > (CSR) space. Enable obtaining the second register space and initializing > PHY and link settings accordingly. > > Signed-off-by: Frank Li > --- > change from v3 to v4 > - remove reset_delay > - sort register field defination > - fix error messag in dev_err_probe > - fix comments > - use true for 1 > - regmap_clear_bits(state->phy_gpr, CSI2SS_CTRL_CLK_RESET, CSI2SS_CTRL_CLK_RESET_EN); > in imx8qxp_gpr_disable() > - use regmap_write to clean register at imx8qxp_gpr_enable() > - remove reduntant CSI2SS_PLM_CTRL_POLARITY > - rename register DATA_TYPE to DATA_TYPE_DISABLE_BF > > change from v2 to v3 > - use dedicate csr reg to control phy and link settings. > > Change from v1 to v2 > - change 8QM go 8QXP, 8QM will failback to 8QXP to keep consisense with > phy drivers > --- > drivers/media/platform/nxp/imx8mq-mipi-csi2.c | 111 ++++++++++++++++++++++++++ > 1 file changed, 111 insertions(+) > > diff --git a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c > index 59ec7107b4508..c6eb6dd0d9e5a 100644 > --- a/drivers/media/platform/nxp/imx8mq-mipi-csi2.c > +++ b/drivers/media/platform/nxp/imx8mq-mipi-csi2.c > @@ -5,6 +5,7 @@ > * Copyright (C) 2021 Purism SPC > */ > > +#include > #include > #include > #include > @@ -88,6 +89,7 @@ static const char * const imx8mq_mipi_csi_clk_id[CSI2_NUM_CLKS] = { > struct imx8mq_plat_data { > int (*enable)(struct csi_state *state, u32 hs_settle); > void (*disable)(struct csi_state *state); > + bool use_reg_csr; > }; > > /* > @@ -167,6 +169,95 @@ static const struct imx8mq_plat_data imx8mq_data = { > .enable = imx8mq_gpr_enable, > }; > > +/* ----------------------------------------------------------------------------- > + * i.MX8QXP > + */ > + > +#define CSI2SS_PL_CLK_INTERVAL_US 100 > +#define CSI2SS_PL_CLK_TIMEOUT_US 100000 > + > +#define CSI2SS_PLM_CTRL 0x0 > +#define CSI2SS_PLM_CTRL_ENABLE_PL BIT(0) > +#define CSI2SS_PLM_CTRL_VSYNC_OVERRIDE BIT(9) > +#define CSI2SS_PLM_CTRL_HSYNC_OVERRIDE BIT(10) > +#define CSI2SS_PLM_CTRL_VALID_OVERRIDE BIT(11) > +#define CSI2SS_PLM_CTRL_POLARITY_HIGH BIT(12) > +#define CSI2SS_PLM_CTRL_PL_CLK_RUN BIT(31) > + > +#define CSI2SS_PHY_CTRL 0x4 > +#define CSI2SS_PHY_CTRL_RX_ENABLE BIT(0) > +#define CSI2SS_PHY_CTRL_AUTO_PD_EN BIT(1) > +#define CSI2SS_PHY_CTRL_DDRCLK_EN BIT(2) > +#define CSI2SS_PHY_CTRL_CONT_CLK_MODE BIT(3) > +#define CSI2SS_PHY_CTRL_RX_HS_SETTLE_MASK GENMASK(9, 4) > +#define CSI2SS_PHY_CTRL_RTERM_SEL BIT(21) > +#define CSI2SS_PHY_CTRL_PD BIT(22) > + > +#define CSI2SS_DATA_TYPE_DISABLE_BF 0x38 > +#define CSI2SS_DATA_TYPE_DISABLE_BF_MASK GENMASK(23, 0) > + > +#define CSI2SS_CTRL_CLK_RESET 0x44 > +#define CSI2SS_CTRL_CLK_RESET_EN BIT(0) > + > +static int imx8qxp_gpr_enable(struct csi_state *state, u32 hs_settle) > +{ > + int ret; > + u32 val; > + > + /* Clear format */ > + regmap_clear_bits(state->phy_gpr, > + CSI2SS_DATA_TYPE_DISABLE_BF, CSI2SS_DATA_TYPE_DISABLE_BF_MASK); regmap_clear_bits(state->phy_gpr, CSI2SS_DATA_TYPE_DISABLE_BF, CSI2SS_DATA_TYPE_DISABLE_BF_MASK); > + > + regmap_write(state->phy_gpr, CSI2SS_PLM_CTRL, 0x0); > + regmap_write(state->phy_gpr, CSI2SS_PHY_CTRL, 0x0); This write to CSI2SS_PHY_CTRL is overridden by the next line. Is it needed ? > + > + regmap_write(state->phy_gpr, CSI2SS_PHY_CTRL, > + FIELD_PREP(CSI2SS_PHY_CTRL_RX_HS_SETTLE_MASK, hs_settle) | > + CSI2SS_PHY_CTRL_RX_ENABLE | CSI2SS_PHY_CTRL_DDRCLK_EN | > + CSI2SS_PHY_CTRL_CONT_CLK_MODE | CSI2SS_PHY_CTRL_PD | > + CSI2SS_PHY_CTRL_RTERM_SEL | CSI2SS_PHY_CTRL_AUTO_PD_EN); > + > + ret = regmap_read_poll_timeout(state->phy_gpr, CSI2SS_PLM_CTRL, > + val, !(val & CSI2SS_PLM_CTRL_PL_CLK_RUN), > + CSI2SS_PL_CLK_INTERVAL_US, > + CSI2SS_PL_CLK_TIMEOUT_US); > + > + if (ret) { > + dev_err(state->dev, "Timeout waiting for Pixel-Link clock"); Missing \n at end of string. > + return ret; > + } > + > + /* Enable Pixel link Master */ > + regmap_set_bits(state->phy_gpr, CSI2SS_PLM_CTRL, > + CSI2SS_PLM_CTRL_ENABLE_PL | CSI2SS_PLM_CTRL_VALID_OVERRIDE); > + > + /* PHY Enable */ > + regmap_clear_bits(state->phy_gpr, CSI2SS_PHY_CTRL, > + CSI2SS_PHY_CTRL_PD | CSI2SS_PLM_CTRL_POLARITY_HIGH); > + > + /* Release Reset */ > + regmap_set_bits(state->phy_gpr, CSI2SS_CTRL_CLK_RESET, CSI2SS_CTRL_CLK_RESET_EN); > + > + return ret; > +} > + > +static void imx8qxp_gpr_disable(struct csi_state *state) > +{ > + /* Disable Pixel Link */ > + regmap_write(state->phy_gpr, CSI2SS_PLM_CTRL, 0x0); > + > + /* Disable PHY */ > + regmap_write(state->phy_gpr, CSI2SS_PHY_CTRL, 0x0); > + > + regmap_clear_bits(state->phy_gpr, CSI2SS_CTRL_CLK_RESET, CSI2SS_CTRL_CLK_RESET_EN); regmap_clear_bits(state->phy_gpr, CSI2SS_CTRL_CLK_RESET, CSI2SS_CTRL_CLK_RESET_EN); With those small issues addressed, Reviewed-by: Laurent Pinchart > +}; > + > +static const struct imx8mq_plat_data imx8qxp_data = { > + .enable = imx8qxp_gpr_enable, > + .disable = imx8qxp_gpr_disable, > + .use_reg_csr = true, > +}; > + > static const struct csi2_pix_format imx8mq_mipi_csi_formats[] = { > /* RAW (Bayer and greyscale) formats. */ > { > @@ -865,6 +956,25 @@ static int imx8mq_mipi_csi_parse_dt(struct csi_state *state) > return PTR_ERR(state->rst); > } > > + if (state->pdata->use_reg_csr) { > + const struct regmap_config regmap_config = { > + .reg_bits = 32, > + .val_bits = 32, > + .reg_stride = 4, > + }; > + void __iomem *base; > + > + base = devm_platform_ioremap_resource(to_platform_device(dev), 1); > + if (IS_ERR(base)) > + return dev_err_probe(dev, IS_ERR(base), "Missing CSR register\n"); > + > + state->phy_gpr = devm_regmap_init_mmio(dev, base, ®map_config); > + if (IS_ERR(state->phy_gpr)) > + return dev_err_probe(dev, PTR_ERR(state->phy_gpr), > + "Failed to init CSI MMIO regmap\n"); > + return 0; > + } > + > ret = of_property_read_u32_array(np, "fsl,mipi-phy-gpr", out_val, > ARRAY_SIZE(out_val)); > if (ret) { > @@ -984,6 +1094,7 @@ static void imx8mq_mipi_csi_remove(struct platform_device *pdev) > > static const struct of_device_id imx8mq_mipi_csi_of_match[] = { > { .compatible = "fsl,imx8mq-mipi-csi2", .data = &imx8mq_data }, > + { .compatible = "fsl,imx8qxp-mipi-csi2", .data = &imx8qxp_data }, > { /* sentinel */ }, > }; > MODULE_DEVICE_TABLE(of, imx8mq_mipi_csi_of_match); -- Regards, Laurent Pinchart