From patchwork Thu Jan 21 07:09:32 2016 Content-Type: text/plain; charset="utf-8" MIME-Version: 1.0 Content-Transfer-Encoding: 7bit X-Patchwork-Submitter: Archit Taneja X-Patchwork-Id: 8078731 Return-Path: X-Original-To: patchwork-dri-devel@patchwork.kernel.org Delivered-To: patchwork-parsemail@patchwork2.web.kernel.org Received: from mail.kernel.org (mail.kernel.org [198.145.29.136]) by patchwork2.web.kernel.org (Postfix) with ESMTP id 9D03DBEEED for ; Thu, 21 Jan 2016 07:10:19 +0000 (UTC) Received: from mail.kernel.org (localhost [127.0.0.1]) by mail.kernel.org (Postfix) with ESMTP id 78FEA204A9 for ; Thu, 21 Jan 2016 07:10:18 +0000 (UTC) Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177]) by mail.kernel.org (Postfix) with ESMTP id 4BCCF205DD for ; Thu, 21 Jan 2016 07:10:16 +0000 (UTC) Received: from gabe.freedesktop.org (localhost [127.0.0.1]) by gabe.freedesktop.org (Postfix) with ESMTP id 44A936E423; Wed, 20 Jan 2016 23:10:15 -0800 (PST) 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 4D9996E416 for ; Wed, 20 Jan 2016 23:10:10 -0800 (PST) Received: from smtp.codeaurora.org (localhost [127.0.0.1]) by smtp.codeaurora.org (Postfix) with ESMTP id 3F2A16061A; Thu, 21 Jan 2016 07:10:10 +0000 (UTC) Received: by smtp.codeaurora.org (Postfix, from userid 1000) id 2E51D60269; Thu, 21 Jan 2016 07:10:10 +0000 (UTC) X-Spam-Checker-Version: SpamAssassin 3.3.1 (2010-03-16) on mail.kernel.org X-Spam-Level: X-Spam-Status: No, score=-4.2 required=5.0 tests=BAYES_00, RCVD_IN_DNSWL_MED, RP_MATCHES_RCVD, UNPARSEABLE_RELAY autolearn=unavailable version=3.3.1 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 9A38960269; Thu, 21 Jan 2016 07:10:07 +0000 (UTC) From: Archit Taneja To: robdclark@gmail.com Subject: [PATCH 04/13] drm/msm/hdmi: Clean up connector gpio usage Date: Thu, 21 Jan 2016 12:39:32 +0530 Message-Id: <1453360181-31738-5-git-send-email-architt@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1453360181-31738-1-git-send-email-architt@codeaurora.org> References: <1453360181-31738-1-git-send-email-architt@codeaurora.org> X-Virus-Scanned: ClamAV using ClamSMTP Cc: linux-arm-msm@vger.kernel.org, dri-devel@lists.freedesktop.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 Make gpio allocation and usage iterative by parsing the gpios on a given platform from a list. This gives us flexibility over what all gpios exist for a platform, whether they are input or output, and what value they should be set to. In particular, this will make hdmi on 8x96 platforms easier to integrate with the driver, as it doesn't have a hpd gpio input to them. Also, it cleans things up a bit. We still use the legacy gpio api here, as we might need to backport this driver to downstream kernels. Signed-off-by: Archit Taneja --- drivers/gpu/drm/msm/hdmi/hdmi.c | 31 +++++-- drivers/gpu/drm/msm/hdmi/hdmi.h | 11 ++- drivers/gpu/drm/msm/hdmi/hdmi_connector.c | 130 +++++++++--------------------- 3 files changed, 69 insertions(+), 103 deletions(-) diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.c b/drivers/gpu/drm/msm/hdmi/hdmi.c index 9a0989c..68cc3cd 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi.c @@ -388,7 +388,21 @@ static struct hdmi_platform_config hdmi_tx_8996_config = { .hpd_freq = hpd_clk_freq_8x74, }; -static int get_gpio(struct device *dev, struct device_node *of_node, const char *name) +static const struct { + const char *name; + const bool output; + const int value; + const char *label; +} hdmi_gpio_pdata[] = { + { "qcom,hdmi-tx-ddc-clk", true, 1, "HDMI_DDC_CLK" }, + { "qcom,hdmi-tx-ddc-data", true, 1, "HDMI_DDC_DATA" }, + { "qcom,hdmi-tx-hpd", false, 1, "HDMI_HPD" }, + { "qcom,hdmi-tx-mux-en", true, 1, "HDMI_MUX_EN" }, + { "qcom,hdmi-tx-mux-sel", true, 0, "HDMI_MUX_SEL" }, + { "qcom,hdmi-tx-mux-lpm", true, 1, "HDMI_MUX_LPM" }, +}; + +static int get_gpio(struct device_node *of_node, const char *name) { int gpio = of_get_named_gpio(of_node, name, 0); if (gpio < 0) { @@ -410,6 +424,7 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data) static struct hdmi_platform_config *hdmi_cfg; struct hdmi *hdmi; struct device_node *of_node = dev->of_node; + int i; hdmi_cfg = (struct hdmi_platform_config *) of_device_get_match_data(dev); @@ -420,12 +435,14 @@ static int hdmi_bind(struct device *dev, struct device *master, void *data) hdmi_cfg->mmio_name = "core_physical"; hdmi_cfg->qfprom_mmio_name = "qfprom_physical"; - hdmi_cfg->ddc_clk_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-clk"); - hdmi_cfg->ddc_data_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-ddc-data"); - hdmi_cfg->hpd_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-hpd"); - hdmi_cfg->mux_en_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-en"); - hdmi_cfg->mux_sel_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-sel"); - hdmi_cfg->mux_lpm_gpio = get_gpio(dev, of_node, "qcom,hdmi-tx-mux-lpm"); + + for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { + hdmi_cfg->gpios[i].num = get_gpio(of_node, + hdmi_gpio_pdata[i].name); + hdmi_cfg->gpios[i].output = hdmi_gpio_pdata[i].output; + hdmi_cfg->gpios[i].value = hdmi_gpio_pdata[i].value; + hdmi_cfg->gpios[i].label = hdmi_gpio_pdata[i].label; + } dev->platform_data = hdmi_cfg; diff --git a/drivers/gpu/drm/msm/hdmi/hdmi.h b/drivers/gpu/drm/msm/hdmi/hdmi.h index d0e6631..d715332 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi.h +++ b/drivers/gpu/drm/msm/hdmi/hdmi.h @@ -27,10 +27,18 @@ #include "msm_drv.h" #include "hdmi.xml.h" +#define HDMI_MAX_NUM_GPIO 6 struct hdmi_phy; struct hdmi_platform_config; +struct hdmi_gpio_data { + int num; + bool output; + int value; + const char *label; +}; + struct hdmi_audio { bool enabled; struct hdmi_audio_infoframe infoframe; @@ -110,8 +118,7 @@ struct hdmi_platform_config { int pwr_clk_cnt; /* gpio's: */ - int ddc_clk_gpio, ddc_data_gpio, hpd_gpio, mux_en_gpio, mux_sel_gpio; - int mux_lpm_gpio; + struct hdmi_gpio_data gpios[HDMI_MAX_NUM_GPIO]; }; void hdmi_set_mode(struct hdmi *hdmi, bool power_on); diff --git a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c index a3b05ae..9d17310f 100644 --- a/drivers/gpu/drm/msm/hdmi/hdmi_connector.c +++ b/drivers/gpu/drm/msm/hdmi/hdmi_connector.c @@ -81,114 +81,53 @@ static int gpio_config(struct hdmi *hdmi, bool on) { struct device *dev = &hdmi->pdev->dev; const struct hdmi_platform_config *config = hdmi->config; - int ret; + int ret, i; if (on) { - if (config->ddc_clk_gpio != -1) { - ret = gpio_request(config->ddc_clk_gpio, "HDMI_DDC_CLK"); - if (ret) { - dev_err(dev, "'%s'(%d) gpio_request failed: %d\n", - "HDMI_DDC_CLK", config->ddc_clk_gpio, ret); - goto error1; - } - gpio_set_value_cansleep(config->ddc_clk_gpio, 1); - } - - if (config->ddc_data_gpio != -1) { - ret = gpio_request(config->ddc_data_gpio, "HDMI_DDC_DATA"); - if (ret) { - dev_err(dev, "'%s'(%d) gpio_request failed: %d\n", - "HDMI_DDC_DATA", config->ddc_data_gpio, ret); - goto error2; + for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { + struct hdmi_gpio_data gpio = config->gpios[i]; + + if (gpio.num != -1) { + ret = gpio_request(gpio.num, gpio.label); + if (ret) { + dev_err(dev, + "'%s'(%d) gpio_request failed: %d\n", + gpio.label, gpio.num, ret); + goto err; + } + + if (gpio.output) { + gpio_direction_output(gpio.num, + gpio.value); + } else { + gpio_direction_input(gpio.num); + gpio_set_value_cansleep(gpio.num, + gpio.value); + } } - gpio_set_value_cansleep(config->ddc_data_gpio, 1); } - ret = gpio_request(config->hpd_gpio, "HDMI_HPD"); - if (ret) { - dev_err(dev, "'%s'(%d) gpio_request failed: %d\n", - "HDMI_HPD", config->hpd_gpio, ret); - goto error3; - } - gpio_direction_input(config->hpd_gpio); - gpio_set_value_cansleep(config->hpd_gpio, 1); - - if (config->mux_en_gpio != -1) { - ret = gpio_request(config->mux_en_gpio, "HDMI_MUX_EN"); - if (ret) { - dev_err(dev, "'%s'(%d) gpio_request failed: %d\n", - "HDMI_MUX_EN", config->mux_en_gpio, ret); - goto error4; - } - gpio_set_value_cansleep(config->mux_en_gpio, 1); - } - - if (config->mux_sel_gpio != -1) { - ret = gpio_request(config->mux_sel_gpio, "HDMI_MUX_SEL"); - if (ret) { - dev_err(dev, "'%s'(%d) gpio_request failed: %d\n", - "HDMI_MUX_SEL", config->mux_sel_gpio, ret); - goto error5; - } - gpio_set_value_cansleep(config->mux_sel_gpio, 0); - } - - if (config->mux_lpm_gpio != -1) { - ret = gpio_request(config->mux_lpm_gpio, - "HDMI_MUX_LPM"); - if (ret) { - dev_err(dev, - "'%s'(%d) gpio_request failed: %d\n", - "HDMI_MUX_LPM", - config->mux_lpm_gpio, ret); - goto error6; - } - gpio_set_value_cansleep(config->mux_lpm_gpio, 1); - } DBG("gpio on"); } else { - if (config->ddc_clk_gpio != -1) - gpio_free(config->ddc_clk_gpio); - - if (config->ddc_data_gpio != -1) - gpio_free(config->ddc_data_gpio); - - gpio_free(config->hpd_gpio); + for (i = 0; i < HDMI_MAX_NUM_GPIO; i++) { + struct hdmi_gpio_data gpio = config->gpios[i]; - if (config->mux_en_gpio != -1) { - gpio_set_value_cansleep(config->mux_en_gpio, 0); - gpio_free(config->mux_en_gpio); - } + if (gpio.output) { + int value = gpio.value ? 0 : 1; + gpio_set_value_cansleep(gpio.num, value); + } - if (config->mux_sel_gpio != -1) { - gpio_set_value_cansleep(config->mux_sel_gpio, 1); - gpio_free(config->mux_sel_gpio); - } + gpio_free(gpio.num); + }; - if (config->mux_lpm_gpio != -1) { - gpio_set_value_cansleep(config->mux_lpm_gpio, 0); - gpio_free(config->mux_lpm_gpio); - } DBG("gpio off"); } return 0; +err: + while (i--) + gpio_free(config->gpios[i].num); -error6: - if (config->mux_sel_gpio != -1) - gpio_free(config->mux_sel_gpio); -error5: - if (config->mux_en_gpio != -1) - gpio_free(config->mux_en_gpio); -error4: - gpio_free(config->hpd_gpio); -error3: - if (config->ddc_data_gpio != -1) - gpio_free(config->ddc_data_gpio); -error2: - if (config->ddc_clk_gpio != -1) - gpio_free(config->ddc_clk_gpio); -error1: return ret; } @@ -345,10 +284,13 @@ static enum drm_connector_status detect_reg(struct hdmi *hdmi) connector_status_connected : connector_status_disconnected; } +#define HPD_GPIO_INDEX 2 static enum drm_connector_status detect_gpio(struct hdmi *hdmi) { const struct hdmi_platform_config *config = hdmi->config; - return gpio_get_value(config->hpd_gpio) ? + struct hdmi_gpio_data hpd_gpio = config->gpios[HPD_GPIO_INDEX]; + + return gpio_get_value(hpd_gpio.num) ? connector_status_connected : connector_status_disconnected; }