Return-Path: Received: (majordomo@vger.kernel.org) by vger.kernel.org via listexpand id S1754092AbbLJMmG (ORCPT ); Thu, 10 Dec 2015 07:42:06 -0500 Received: from smtp.codeaurora.org ([198.145.29.96]:36510 "EHLO smtp.codeaurora.org" rhost-flags-OK-OK-OK-OK) by vger.kernel.org with ESMTP id S1753286AbbLJMmB (ORCPT ); Thu, 10 Dec 2015 07:42:01 -0500 From: Archit Taneja To: dri-devel@lists.freedesktop.org, a.hajda@samsung.com, jani.nikula@linux.intel.com Cc: linux-kernel@vger.kernel.org, airlied@linux.ie, daniel@ffwll.ch, treding@nvidia.com, l.stach@pengutronix.de, robh@kernel.org, linux-arm-msm@vger.kernel.org, Archit Taneja Subject: [PATCH v4 3/6] drm/dsi: Try to match non-DT dsi devices Date: Thu, 10 Dec 2015 18:11:37 +0530 Message-Id: <1449751300-2841-4-git-send-email-architt@codeaurora.org> X-Mailer: git-send-email 1.8.2.1 In-Reply-To: <1449751300-2841-1-git-send-email-architt@codeaurora.org> References: <1448884892-7731-1-git-send-email-architt@codeaurora.org> <1449751300-2841-1-git-send-email-architt@codeaurora.org> Sender: linux-kernel-owner@vger.kernel.org List-ID: X-Mailing-List: linux-kernel@vger.kernel.org Content-Length: 4018 Lines: 119 Add a device name field in mipi_dsi_device. This name is different from the actual dev name (which is of the format "hostname.reg"). When the device is created via DT, this name is set to the modalias string. In the non-DT case, the driver creating the DSI device provides the name by populating a filed in mipi_dsi_device_info. Matching for DT case would be as it was before. For the non-DT case, we compare the device and driver names. Other buses (like i2c/spi) perform a non-DT match by comparing the device name and entries in the driver's id_table. Such a mechanism isn't used for the dsi bus. Reviewed-by: Andrzej Hajda Signed-off-by: Archit Taneja --- drivers/gpu/drm/drm_mipi_dsi.c | 25 ++++++++++++++++++++++++- include/drm/drm_mipi_dsi.h | 6 ++++++ 2 files changed, 30 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/drm_mipi_dsi.c b/drivers/gpu/drm/drm_mipi_dsi.c index 9434585..5a46802 100644 --- a/drivers/gpu/drm/drm_mipi_dsi.c +++ b/drivers/gpu/drm/drm_mipi_dsi.c @@ -45,9 +45,26 @@ * subset of the MIPI DCS command set. */ +static const struct device_type mipi_dsi_device_type; + static int mipi_dsi_device_match(struct device *dev, struct device_driver *drv) { - return of_driver_match_device(dev, drv); + struct mipi_dsi_device *dsi; + + if (dev->type == &mipi_dsi_device_type) + dsi = to_mipi_dsi_device(dev); + else + return 0; + + /* attempt OF style match */ + if (of_driver_match_device(dev, drv)) + return 1; + + /* compare dsi device and driver names */ + if (!strcmp(dsi->name, drv->name)) + return 1; + + return 0; } static const struct dev_pm_ops mipi_dsi_device_pm_ops = { @@ -125,6 +142,7 @@ struct mipi_dsi_device *mipi_dsi_device_new(struct mipi_dsi_host *host, dsi->dev.type = &mipi_dsi_device_type; dsi->dev.of_node = info->node; dsi->channel = info->reg; + strlcpy(dsi->name, info->type, sizeof(dsi->name)); dev_set_name(&dsi->dev, "%s.%d", dev_name(host->dev), info->reg); @@ -148,6 +166,11 @@ of_mipi_dsi_device_add(struct mipi_dsi_host *host, struct device_node *node) int ret; u32 reg; + if (of_modalias_node(node, info.type, sizeof(info.type)) < 0) { + dev_err(dev, "modalias failure on %s\n", node->full_name); + return ERR_PTR(-EINVAL); + } + ret = of_property_read_u32(node, "reg", ®); if (ret) { dev_err(dev, "device node %s has no valid reg property: %d\n", diff --git a/include/drm/drm_mipi_dsi.h b/include/drm/drm_mipi_dsi.h index 90f4f3c..cb084af 100644 --- a/include/drm/drm_mipi_dsi.h +++ b/include/drm/drm_mipi_dsi.h @@ -139,8 +139,11 @@ enum mipi_dsi_pixel_format { MIPI_DSI_FMT_RGB565, }; +#define DSI_DEV_NAME_SIZE 20 + /** * struct mipi_dsi_device_info - template for creating a mipi_dsi_device + * @type: dsi peripheral chip type * @reg: DSI virtual channel assigned to peripheral * @node: pointer to OF device node * @@ -148,6 +151,7 @@ enum mipi_dsi_pixel_format { * DSI device */ struct mipi_dsi_device_info { + char type[DSI_DEV_NAME_SIZE]; u32 reg; struct device_node *node; }; @@ -156,6 +160,7 @@ struct mipi_dsi_device_info { * struct mipi_dsi_device - DSI peripheral device * @host: DSI host for this peripheral * @dev: driver model device node for this peripheral + * @name: dsi peripheral chip type * @channel: virtual channel assigned to the peripheral * @format: pixel format for video mode * @lanes: number of active data lanes @@ -165,6 +170,7 @@ struct mipi_dsi_device { struct mipi_dsi_host *host; struct device dev; + char name[DSI_DEV_NAME_SIZE]; unsigned int channel; unsigned int lanes; enum mipi_dsi_pixel_format format; -- The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum, hosted by The Linux Foundation -- To unsubscribe from this list: send the line "unsubscribe linux-kernel" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html Please read the FAQ at http://www.tux.org/lkml/