From patchwork Tue Apr 20 12:04:04 2021 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Tomi Valkeinen X-Patchwork-Id: 424807 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=-18.8 required=3.0 tests=BAYES_00,DKIM_SIGNED, DKIM_VALID, DKIM_VALID_AU, HEADER_FROM_DIFFERENT_DOMAINS, INCLUDES_CR_TRAILER, INCLUDES_PATCH, MAILING_LIST_MULTI, SPF_HELO_NONE, SPF_PASS, 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 460A6C43470 for ; Tue, 20 Apr 2021 12:05:21 +0000 (UTC) Received: from vger.kernel.org (vger.kernel.org [23.128.96.18]) by mail.kernel.org (Postfix) with ESMTP id 11597613C0 for ; Tue, 20 Apr 2021 12:05:21 +0000 (UTC) Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S232134AbhDTMFv (ORCPT ); Tue, 20 Apr 2021 08:05:51 -0400 Received: from perceval.ideasonboard.com ([213.167.242.64]:57972 "EHLO perceval.ideasonboard.com" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S230118AbhDTMFr (ORCPT ); Tue, 20 Apr 2021 08:05:47 -0400 Received: from deskari.lan (91-157-208-71.elisa-laajakaista.fi [91.157.208.71]) by perceval.ideasonboard.com (Postfix) with ESMTPSA id 0631C8AD; Tue, 20 Apr 2021 14:05:14 +0200 (CEST) DKIM-Signature: v=1; a=rsa-sha256; c=relaxed/simple; d=ideasonboard.com; s=mail; t=1618920315; bh=a0F7GnXLHhYxK2/Wer+Z5NQTXkV30q8gWPVazU9DmK8=; h=From:To:Cc:Subject:Date:In-Reply-To:References:From; b=Rts2DHbML26eFH5EJ1AjB8edRYniiax4UWvKYK+fqlNLiyyDLVEfjoyIEDisy4+f/ LwcHuk4yUr5ND56t4ENxgifBeep5EAFZQsA2aIsp1jG4jCCRKJLrx53Qa9zf43Hnig yDfT4vWyaBX1ND8lvuM3HT4t2yTOCcbWPnc1N2QI= From: Tomi Valkeinen To: Benoit Parrot , Laurent Pinchart , Pratyush Yadav , Lokesh Vutla , linux-media@vger.kernel.org Cc: Tomi Valkeinen Subject: [PATCH v2 06/35] media: ti-vpe: cal: use v4l2_get_link_freq Date: Tue, 20 Apr 2021 15:04:04 +0300 Message-Id: <20210420120433.902394-7-tomi.valkeinen@ideasonboard.com> X-Mailer: git-send-email 2.25.1 In-Reply-To: <20210420120433.902394-1-tomi.valkeinen@ideasonboard.com> References: <20210420120433.902394-1-tomi.valkeinen@ideasonboard.com> MIME-Version: 1.0 Precedence: bulk List-ID: X-Mailing-List: linux-media@vger.kernel.org CAL driver uses V4L2_CID_PIXEL_RATE to get the required pixel rate, and then changes that value to link rate before configuring the registers. Rewrite the code to use v4l2_get_link_freq(), which simplifies the code as we get the link rate directly, and it also adds support for V4L2_CID_LINK_FREQ. Signed-off-by: Tomi Valkeinen Reviewed-by: Laurent Pinchart --- drivers/media/platform/ti-vpe/cal-camerarx.c | 52 +++++++------------- 1 file changed, 19 insertions(+), 33 deletions(-) diff --git a/drivers/media/platform/ti-vpe/cal-camerarx.c b/drivers/media/platform/ti-vpe/cal-camerarx.c index 988a01529dbc..9591a0c8a215 100644 --- a/drivers/media/platform/ti-vpe/cal-camerarx.c +++ b/drivers/media/platform/ti-vpe/cal-camerarx.c @@ -45,22 +45,23 @@ static inline void camerarx_write(struct cal_camerarx *phy, u32 offset, u32 val) * ------------------------------------------------------------------ */ -static s64 cal_camerarx_get_external_rate(struct cal_camerarx *phy) +static s64 cal_camerarx_get_ext_link_freq(struct cal_camerarx *phy) { - struct v4l2_ctrl *ctrl; - s64 rate; + struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 = &phy->endpoint.bus.mipi_csi2; + u32 num_lanes = mipi_csi2->num_data_lanes; + u32 bpp = phy->fmtinfo->bpp; + s64 freq; - ctrl = v4l2_ctrl_find(phy->source->ctrl_handler, V4L2_CID_PIXEL_RATE); - if (!ctrl) { - phy_err(phy, "no pixel rate control in subdev: %s\n", + freq = v4l2_get_link_freq(phy->source->ctrl_handler, bpp, 2 * num_lanes); + if (freq < 0) { + phy_err(phy, "failed to get link freq for subdev '%s'\n", phy->source->name); - return -EPIPE; + return freq; } - rate = v4l2_ctrl_g_ctrl_int64(ctrl); - phy_dbg(3, phy, "Source Pixel Rate: %llu\n", rate); + phy_dbg(3, phy, "Source Link Freq: %llu\n", freq); - return rate; + return freq; } static void cal_camerarx_lane_config(struct cal_camerarx *phy) @@ -116,34 +117,19 @@ void cal_camerarx_disable(struct cal_camerarx *phy) #define TCLK_MISS 1 #define TCLK_SETTLE 14 -static void cal_camerarx_config(struct cal_camerarx *phy, s64 external_rate) +static void cal_camerarx_config(struct cal_camerarx *phy, s64 link_freq) { unsigned int reg0, reg1; unsigned int ths_term, ths_settle; - unsigned int csi2_ddrclk_khz; - struct v4l2_fwnode_bus_mipi_csi2 *mipi_csi2 = - &phy->endpoint.bus.mipi_csi2; - u32 num_lanes = mipi_csi2->num_data_lanes; /* DPHY timing configuration */ - /* - * CSI-2 is DDR and we only count used lanes. - * - * csi2_ddrclk_khz = external_rate / 1000 - * / (2 * num_lanes) * phy->fmtinfo->bpp; - */ - csi2_ddrclk_khz = div_s64(external_rate * phy->fmtinfo->bpp, - 2 * num_lanes * 1000); - - phy_dbg(1, phy, "csi2_ddrclk_khz: %d\n", csi2_ddrclk_khz); - /* THS_TERM: Programmed value = floor(20 ns/DDRClk period) */ - ths_term = 20 * csi2_ddrclk_khz / 1000000; + ths_term = div_s64(20 * link_freq, 1000 * 1000 * 1000); phy_dbg(1, phy, "ths_term: %d (0x%02x)\n", ths_term, ths_term); /* THS_SETTLE: Programmed value = floor(105 ns/DDRClk period) + 4 */ - ths_settle = (105 * csi2_ddrclk_khz / 1000000) + 4; + ths_settle = div_s64(105 * link_freq, 1000 * 1000 * 1000) + 4; phy_dbg(1, phy, "ths_settle: %d (0x%02x)\n", ths_settle, ths_settle); reg0 = camerarx_read(phy, CAL_CSI2_PHY_REG0); @@ -270,14 +256,14 @@ static void cal_camerarx_ppi_disable(struct cal_camerarx *phy) static int cal_camerarx_start(struct cal_camerarx *phy) { - s64 external_rate; + s64 link_freq; u32 sscounter; u32 val; int ret; - external_rate = cal_camerarx_get_external_rate(phy); - if (external_rate < 0) - return external_rate; + link_freq = cal_camerarx_get_ext_link_freq(phy); + if (link_freq < 0) + return link_freq; ret = v4l2_subdev_call(phy->source, core, s_power, 1); if (ret < 0 && ret != -ENOIOCTLCMD && ret != -ENODEV) { @@ -325,7 +311,7 @@ static int cal_camerarx_start(struct cal_camerarx *phy) camerarx_read(phy, CAL_CSI2_PHY_REG0); /* Program the PHY timing parameters. */ - cal_camerarx_config(phy, external_rate); + cal_camerarx_config(phy, link_freq); /* * b. Assert the FORCERXMODE signal.