From patchwork Wed Jun 8 10:27:52 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Archit Taneja X-Patchwork-Id: 9164203 Return-Path: Received: from mail.wl.linuxfoundation.org (pdx-wl-mail.web.codeaurora.org [172.30.200.125]) by pdx-korg-patchwork.web.codeaurora.org (Postfix) with ESMTP id 4CE0060832 for ; Wed, 8 Jun 2016 10:29:19 +0000 (UTC) Received: from mail.wl.linuxfoundation.org (localhost [127.0.0.1]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id 3FA762834F for ; Wed, 8 Jun 2016 10:29:19 +0000 (UTC) Received: by mail.wl.linuxfoundation.org (Postfix, from userid 486) id 3277528345; Wed, 8 Jun 2016 10:29:19 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on pdx-wl-mail.web.codeaurora.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=2.0 tests=BAYES_00, RCVD_IN_DNSWL_MED autolearn=ham version=3.3.1 Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.wl.linuxfoundation.org (Postfix) with ESMTP id BBDE428345 for ; Wed, 8 Jun 2016 10:29:18 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 66E9D6E96D; Wed, 8 Jun 2016 10:29:17 +0000 (UTC) X-Original-To: dri-devel@lists.freedesktop.org Delivered-To: dri-devel@lists.freedesktop.org Received: from smtp.codeaurora.org (smtp.codeaurora.org [198.145.29.96]) by gabe.freedesktop.org (Postfix) with ESMTPS id 2CDD26E96C for ; Wed, 8 Jun 2016 10:28:31 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 016CC614FD; Wed, 8 Jun 2016 10:28:30 +0000 (UTC) Received: from localhost (unknown [202.46.23.61]) (using TLSv1.2 with cipher DHE-RSA-AES128-SHA (128/128 bits)) (No client certificate requested) (Authenticated sender: architt@smtp.codeaurora.org) by smtp.codeaurora.org (Postfix) with ESMTPSA id 5DA986145E; Wed, 8 Jun 2016 10:28:27 +0000 (UTC) From: Archit Taneja To: dri-devel@lists.freedesktop.org, treding@nvidia.com, laurent.pinchart@ideasonboard.com, xinliang.liu@linaro.org Subject: [PATCH v5 6/7] drm/i2c: adv7533: Change number of DSI lanes dynamically Date: Wed, 8 Jun 2016 15:57:52 +0530 Message-Id: <1465381673-32471-7-git-send-email-architt@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1465381673-32471-1-git-send-email-architt@codeaurora.org> References: <1463395270-3100-1-git-send-email-architt@codeaurora.org> <1465381673-32471-1-git-send-email-architt@codeaurora.org> Cc: linux-arm-msm@vger.kernel.org, amit.kucheria@linaro.org, srinivas.kandagatla@linaro.org X-BeenThere: dri-devel@lists.freedesktop.org X-Mailman-Version: 2.1.18 Precedence: list List-Id: Direct Rendering Infrastructure - Development List-Unsubscribe: , List-Archive: List-Post: List-Help: List-Subscribe: , MIME-Version: 1.0 Errors-To: dri-devel-bounces@lists.freedesktop.org Sender: "dri-devel" X-Virus-Scanned: ClamAV using ClamSMTP Lower modes on ADV7533 require lower number of DSI lanes for correct operation. If ADV7533 is being used with 4 DSI lanes, then switch the lanes to 3 when the target mode's pixel clock is less than 80 Mhz. Based on patch by Andy Green Signed-off-by: Archit Taneja --- drivers/gpu/drm/i2c/adv7511.c | 3 +++ drivers/gpu/drm/i2c/adv7511.h | 5 +++++ drivers/gpu/drm/i2c/adv7533.c | 22 ++++++++++++++++++++++ 3 files changed, 30 insertions(+) diff --git a/drivers/gpu/drm/i2c/adv7511.c b/drivers/gpu/drm/i2c/adv7511.c index e0c353e..ec8fb2e 100644 --- a/drivers/gpu/drm/i2c/adv7511.c +++ b/drivers/gpu/drm/i2c/adv7511.c @@ -712,6 +712,9 @@ static void adv7511_mode_set(struct adv7511 *adv7511, regmap_update_bits(adv7511->regmap, 0x17, 0x60, (vsync_polarity << 6) | (hsync_polarity << 5)); + if (adv7511->type == ADV7533) + adv7533_mode_set(adv7511, adj_mode); + drm_mode_copy(&adv7511->curr_mode, adj_mode); /* diff --git a/drivers/gpu/drm/i2c/adv7511.h b/drivers/gpu/drm/i2c/adv7511.h index a9745ea..b113b77 100644 --- a/drivers/gpu/drm/i2c/adv7511.h +++ b/drivers/gpu/drm/i2c/adv7511.h @@ -339,6 +339,7 @@ struct adv7511 { #ifdef CONFIG_DRM_I2C_ADV7533 void adv7533_dsi_power_on(struct adv7511 *adv); void adv7533_dsi_power_off(struct adv7511 *adv); +void adv7533_mode_set(struct adv7511 *adv, struct drm_display_mode *mode); int adv7533_patch_registers(struct adv7511 *adv); void adv7533_uninit_cec(struct adv7511 *adv); int adv7533_init_cec(struct adv7511 *adv); @@ -352,6 +353,10 @@ static inline void adv7533_dsi_power_on(struct adv7511 *adv) static inline void adv7533_dsi_power_off(struct adv7511 *adv) { } +static inline void adv7533_mode_set(struct adv7511 *adv, + struct drm_display_mode *mode) +{ +} static inline int adv7533_patch_registers(struct adv7511 *adv) { return -ENODEV; diff --git a/drivers/gpu/drm/i2c/adv7533.c b/drivers/gpu/drm/i2c/adv7533.c index d002ac4..5eebd15 100644 --- a/drivers/gpu/drm/i2c/adv7533.c +++ b/drivers/gpu/drm/i2c/adv7533.c @@ -115,6 +115,28 @@ void adv7533_dsi_power_off(struct adv7511 *adv) regmap_write(adv->regmap_cec, 0x27, 0x0b); } +void adv7533_mode_set(struct adv7511 *adv, struct drm_display_mode *mode) +{ + struct mipi_dsi_device *dsi = adv->dsi; + int lanes, ret; + + if (adv->num_dsi_lanes != 4) + return; + + if (mode->clock > 80000) + lanes = 4; + else + lanes = 3; + + if (lanes != dsi->lanes) { + mipi_dsi_detach(dsi); + dsi->lanes = lanes; + ret = mipi_dsi_attach(dsi); + if (ret) + dev_err(&dsi->dev, "failed to change host lanes\n"); + } +} + int adv7533_patch_registers(struct adv7511 *adv) { return regmap_register_patch(adv->regmap,