From patchwork Wed Oct 10 20:01:42 2012 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Sakari Ailus X-Patchwork-Id: 1575671 Return-Path: X-Original-To: patchwork-linux-media@patchwork.kernel.org Delivered-To: patchwork-process-083081@patchwork1.kernel.org Received: from vger.kernel.org (vger.kernel.org [209.132.180.67]) by patchwork1.kernel.org (Postfix) with ESMTP id 35B1A4025F for ; Wed, 10 Oct 2012 20:01:52 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S932241Ab2JJUBt (ORCPT ); Wed, 10 Oct 2012 16:01:49 -0400 Received: from nblzone-211-213.nblnetworks.fi ([83.145.211.213]:53206 "EHLO hillosipuli.retiisi.org.uk" rhost-flags-OK-OK-OK-FAIL) by vger.kernel.org with ESMTP id S1757178Ab2JJUBr (ORCPT ); Wed, 10 Oct 2012 16:01:47 -0400 Received: from salottisipuli.retiisi.org.uk (salottisipuli.retiisi.org.uk [IPv6:2001:1bc8:102:6d9a::83:2]) by hillosipuli.retiisi.org.uk (Postfix) with ESMTP id 5F142600A0; Wed, 10 Oct 2012 23:01:43 +0300 (EEST) Received: by salottisipuli.retiisi.org.uk (Postfix, from userid 1000) id F03D122F14; Wed, 10 Oct 2012 23:01:42 +0300 (EEST) From: Sakari Ailus To: linux-media@vger.kernel.org, linux-omap@vger.kernel.org Cc: laurent.pinchart@ideasonboard.com, tony@atomide.com, khilman@deeprootsystems.com Subject: [PATCH v4 3/3] omap3isp: Configure CSI-2 phy based on platform data Date: Wed, 10 Oct 2012 23:01:42 +0300 Message-Id: <1349899302-9041-3-git-send-email-sakari.ailus@iki.fi> X-Mailer: git-send-email 1.7.2.5 In-Reply-To: <20121010200115.GO14107@valkosipuli.retiisi.org.uk> References: <20121010200115.GO14107@valkosipuli.retiisi.org.uk> Sender: linux-media-owner@vger.kernel.org Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org Configure CSI-2 phy based on platform data in the ISP driver. For that, the new V4L2_CID_IMAGE_SOURCE_PIXEL_RATE control is used. Previously the same was configured from the board code. This patch is dependent on "omap3: Provide means for changing CSI2 PHY configuration". Signed-off-by: Sakari Ailus Acked-by: Laurent Pinchart --- drivers/media/platform/omap3isp/isp.h | 3 - drivers/media/platform/omap3isp/ispcsiphy.c | 148 ++++++++++++++------------- drivers/media/platform/omap3isp/ispcsiphy.h | 10 -- 3 files changed, 78 insertions(+), 83 deletions(-) diff --git a/drivers/media/platform/omap3isp/isp.h b/drivers/media/platform/omap3isp/isp.h index 6fed222..accb3b0 100644 --- a/drivers/media/platform/omap3isp/isp.h +++ b/drivers/media/platform/omap3isp/isp.h @@ -129,9 +129,6 @@ struct isp_reg { struct isp_platform_callback { u32 (*set_xclk)(struct isp_device *isp, u32 xclk, u8 xclksel); - int (*csiphy_config)(struct isp_csiphy *phy, - struct isp_csiphy_dphy_cfg *dphy, - struct isp_csiphy_lanes_cfg *lanes); }; /* diff --git a/drivers/media/platform/omap3isp/ispcsiphy.c b/drivers/media/platform/omap3isp/ispcsiphy.c index 12ae394..754d7a1 100644 --- a/drivers/media/platform/omap3isp/ispcsiphy.c +++ b/drivers/media/platform/omap3isp/ispcsiphy.c @@ -125,36 +125,6 @@ static void csiphy_routing_cfg(struct isp_csiphy *phy, u32 iface, bool on, } /* - * csiphy_lanes_config - Configuration of CSIPHY lanes. - * - * Updates HW configuration. - * Called with phy->mutex taken. - */ -static void csiphy_lanes_config(struct isp_csiphy *phy) -{ - unsigned int i; - u32 reg; - - reg = isp_reg_readl(phy->isp, phy->cfg_regs, ISPCSI2_PHY_CFG); - - for (i = 0; i < phy->num_data_lanes; i++) { - reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) | - ISPCSI2_PHY_CFG_DATA_POSITION_MASK(i + 1)); - reg |= (phy->lanes.data[i].pol << - ISPCSI2_PHY_CFG_DATA_POL_SHIFT(i + 1)); - reg |= (phy->lanes.data[i].pos << - ISPCSI2_PHY_CFG_DATA_POSITION_SHIFT(i + 1)); - } - - reg &= ~(ISPCSI2_PHY_CFG_CLOCK_POL_MASK | - ISPCSI2_PHY_CFG_CLOCK_POSITION_MASK); - reg |= phy->lanes.clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT; - reg |= phy->lanes.clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT; - - isp_reg_writel(phy->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG); -} - -/* * csiphy_power_autoswitch_enable * @enable: Sets or clears the autoswitch function enable flag. */ @@ -199,43 +169,28 @@ static int csiphy_set_power(struct isp_csiphy *phy, u32 power) } /* - * csiphy_dphy_config - Configure CSI2 D-PHY parameters. - * - * Called with phy->mutex taken. + * TCLK values are OK at their reset values */ -static void csiphy_dphy_config(struct isp_csiphy *phy) -{ - u32 reg; - - /* Set up ISPCSIPHY_REG0 */ - reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG0); - - reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK | - ISPCSIPHY_REG0_THS_SETTLE_MASK); - reg |= phy->dphy.ths_term << ISPCSIPHY_REG0_THS_TERM_SHIFT; - reg |= phy->dphy.ths_settle << ISPCSIPHY_REG0_THS_SETTLE_SHIFT; - - isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG0); - - /* Set up ISPCSIPHY_REG1 */ - reg = isp_reg_readl(phy->isp, phy->phy_regs, ISPCSIPHY_REG1); - - reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK | - ISPCSIPHY_REG1_TCLK_MISS_MASK | - ISPCSIPHY_REG1_TCLK_SETTLE_MASK); - reg |= phy->dphy.tclk_term << ISPCSIPHY_REG1_TCLK_TERM_SHIFT; - reg |= phy->dphy.tclk_miss << ISPCSIPHY_REG1_TCLK_MISS_SHIFT; - reg |= phy->dphy.tclk_settle << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT; +#define TCLK_TERM 0 +#define TCLK_MISS 1 +#define TCLK_SETTLE 14 - isp_reg_writel(phy->isp, reg, phy->phy_regs, ISPCSIPHY_REG1); -} - -static int csiphy_config(struct isp_csiphy *phy, - struct isp_csiphy_dphy_cfg *dphy, - struct isp_csiphy_lanes_cfg *lanes) +static int omap3isp_csiphy_config(struct isp_csiphy *phy) { + struct isp_csi2_device *csi2 = phy->csi2; + struct isp_pipeline *pipe = to_isp_pipeline(&csi2->subdev.entity); + struct isp_v4l2_subdevs_group *subdevs = pipe->external->host_priv; + struct isp_csiphy_lanes_cfg *lanes; + int csi2_ddrclk_khz; unsigned int used_lanes = 0; unsigned int i; + u32 reg; + + if (subdevs->interface == ISP_INTERFACE_CCP2B_PHY1 + || subdevs->interface == ISP_INTERFACE_CCP2B_PHY2) + lanes = &subdevs->bus.ccp2.lanecfg; + else + lanes = &subdevs->bus.csi2.lanecfg; /* Clock and data lanes verification */ for (i = 0; i < phy->num_data_lanes; i++) { @@ -254,10 +209,56 @@ static int csiphy_config(struct isp_csiphy *phy, if (lanes->clk.pos == 0 || used_lanes & (1 << lanes->clk.pos)) return -EINVAL; - mutex_lock(&phy->mutex); - phy->dphy = *dphy; - phy->lanes = *lanes; - mutex_unlock(&phy->mutex); + csiphy_routing_cfg(phy, subdevs->interface, true, + subdevs->bus.ccp2.phy_layer); + + /* DPHY timing configuration */ + /* CSI-2 is DDR and we only count used lanes. */ + csi2_ddrclk_khz = pipe->external_rate / 1000 + / (2 * hweight32(used_lanes)) * pipe->external_width; + + reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG0); + + reg &= ~(ISPCSIPHY_REG0_THS_TERM_MASK | + ISPCSIPHY_REG0_THS_SETTLE_MASK); + /* THS_TERM: Programmed value = ceil(12.5 ns/DDRClk period) - 1. */ + reg |= (DIV_ROUND_UP(25 * csi2_ddrclk_khz, 2000000) - 1) + << ISPCSIPHY_REG0_THS_TERM_SHIFT; + /* THS_SETTLE: Programmed value = ceil(90 ns/DDRClk period) + 3. */ + reg |= (DIV_ROUND_UP(90 * csi2_ddrclk_khz, 1000000) + 3) + << ISPCSIPHY_REG0_THS_SETTLE_SHIFT; + + isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG0); + + reg = isp_reg_readl(csi2->isp, phy->phy_regs, ISPCSIPHY_REG1); + + reg &= ~(ISPCSIPHY_REG1_TCLK_TERM_MASK | + ISPCSIPHY_REG1_TCLK_MISS_MASK | + ISPCSIPHY_REG1_TCLK_SETTLE_MASK); + reg |= TCLK_TERM << ISPCSIPHY_REG1_TCLK_TERM_SHIFT; + reg |= TCLK_MISS << ISPCSIPHY_REG1_TCLK_MISS_SHIFT; + reg |= TCLK_SETTLE << ISPCSIPHY_REG1_TCLK_SETTLE_SHIFT; + + isp_reg_writel(csi2->isp, reg, phy->phy_regs, ISPCSIPHY_REG1); + + /* DPHY lane configuration */ + reg = isp_reg_readl(csi2->isp, phy->cfg_regs, ISPCSI2_PHY_CFG); + + for (i = 0; i < phy->num_data_lanes; i++) { + reg &= ~(ISPCSI2_PHY_CFG_DATA_POL_MASK(i + 1) | + ISPCSI2_PHY_CFG_DATA_POSITION_MASK(i + 1)); + reg |= (lanes->data[i].pol << + ISPCSI2_PHY_CFG_DATA_POL_SHIFT(i + 1)); + reg |= (lanes->data[i].pos << + ISPCSI2_PHY_CFG_DATA_POSITION_SHIFT(i + 1)); + } + + reg &= ~(ISPCSI2_PHY_CFG_CLOCK_POL_MASK | + ISPCSI2_PHY_CFG_CLOCK_POSITION_MASK); + reg |= lanes->clk.pol << ISPCSI2_PHY_CFG_CLOCK_POL_SHIFT; + reg |= lanes->clk.pos << ISPCSI2_PHY_CFG_CLOCK_POSITION_SHIFT; + + isp_reg_writel(csi2->isp, reg, phy->cfg_regs, ISPCSI2_PHY_CFG); return 0; } @@ -282,8 +283,9 @@ int omap3isp_csiphy_acquire(struct isp_csiphy *phy) if (rval < 0) goto done; - csiphy_dphy_config(phy); - csiphy_lanes_config(phy); + rval = omap3isp_csiphy_config(phy); + if (rval < 0) + goto done; rval = csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_ON); if (rval) { @@ -303,6 +305,14 @@ void omap3isp_csiphy_release(struct isp_csiphy *phy) { mutex_lock(&phy->mutex); if (phy->phy_in_use) { + struct isp_csi2_device *csi2 = phy->csi2; + struct isp_pipeline *pipe = + to_isp_pipeline(&csi2->subdev.entity); + struct isp_v4l2_subdevs_group *subdevs = + pipe->external->host_priv; + + csiphy_routing_cfg(phy, subdevs->interface, false, + subdevs->bus.ccp2.phy_layer); csiphy_power_autoswitch_enable(phy, false); csiphy_set_power(phy, ISPCSI2_PHY_CFG_PWR_CMD_OFF); regulator_disable(phy->vdd); @@ -319,8 +329,6 @@ int omap3isp_csiphy_init(struct isp_device *isp) struct isp_csiphy *phy1 = &isp->isp_csiphy1; struct isp_csiphy *phy2 = &isp->isp_csiphy2; - isp->platform_cb.csiphy_config = csiphy_config; - phy2->isp = isp; phy2->csi2 = &isp->isp_csi2a; phy2->num_data_lanes = ISP_CSIPHY2_NUM_DATA_LANES; diff --git a/drivers/media/platform/omap3isp/ispcsiphy.h b/drivers/media/platform/omap3isp/ispcsiphy.h index e93a661..14551fd 100644 --- a/drivers/media/platform/omap3isp/ispcsiphy.h +++ b/drivers/media/platform/omap3isp/ispcsiphy.h @@ -32,14 +32,6 @@ struct isp_csi2_device; struct regulator; -struct isp_csiphy_dphy_cfg { - u8 ths_term; - u8 ths_settle; - u8 tclk_term; - unsigned tclk_miss:1; - u8 tclk_settle; -}; - struct isp_csiphy { struct isp_device *isp; struct mutex mutex; /* serialize csiphy configuration */ @@ -52,8 +44,6 @@ struct isp_csiphy { unsigned int phy_regs; u8 num_data_lanes; /* number of CSI2 Data Lanes supported */ - struct isp_csiphy_lanes_cfg lanes; - struct isp_csiphy_dphy_cfg dphy; }; int omap3isp_csiphy_acquire(struct isp_csiphy *phy);