From patchwork Thu Nov 22 21:45:33 2012
Content-Type: text/plain; charset="utf-8"
MIME-Version: 1.0
Content-Transfer-Encoding: 7bit
X-Patchwork-Submitter: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
X-Patchwork-Id: 1790311
Return-Path: 
 <dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org>
X-Original-To: patchwork-dri-devel@patchwork.kernel.org
Delivered-To: patchwork-process-083081@patchwork2.kernel.org
Received: from gabe.freedesktop.org (gabe.freedesktop.org [131.252.210.177])
	by patchwork2.kernel.org (Postfix) with ESMTP id C1B42DF24C
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Thu, 22 Nov 2012 21:47:02 +0000 (UTC)
Received: from gabe.freedesktop.org (localhost [127.0.0.1])
	by gabe.freedesktop.org (Postfix) with ESMTP id 93C1EE65D8
	for <patchwork-dri-devel@patchwork.kernel.org>;
	Thu, 22 Nov 2012 13:47:02 -0800 (PST)
X-Original-To: dri-devel@lists.freedesktop.org
Delivered-To: dri-devel@lists.freedesktop.org
Received: from perceval.ideasonboard.com (perceval.ideasonboard.com
	[95.142.166.194])
	by gabe.freedesktop.org (Postfix) with ESMTP id 3C97EE5EFA
	for <dri-devel@lists.freedesktop.org>;
	Thu, 22 Nov 2012 13:44:43 -0800 (PST)
Received: from avalon.ideasonboard.com (unknown [91.178.153.41])
	by perceval.ideasonboard.com (Postfix) with ESMTPSA id BC3AA35A87;
	Thu, 22 Nov 2012 22:44:41 +0100 (CET)
From: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
To: linux-fbdev@vger.kernel.org,
	dri-devel@lists.freedesktop.org
Subject: [RFC v2 2/5] video: panel: Add DPI panel support
Date: Thu, 22 Nov 2012 22:45:33 +0100
Message-Id: 
 <1353620736-6517-3-git-send-email-laurent.pinchart@ideasonboard.com>
X-Mailer: git-send-email 1.7.8.6
In-Reply-To: 
 <1353620736-6517-1-git-send-email-laurent.pinchart@ideasonboard.com>
References: 
 <1353620736-6517-1-git-send-email-laurent.pinchart@ideasonboard.com>
Cc: Thomas Petazzoni <thomas.petazzoni@free-electrons.com>,
	Philipp Zabel <p.zabel@pengutronix.de>, Tom Gall <tom.gall@linaro.org>,
	Ragesh Radhakrishnan <ragesh.r@linaro.org>,
	Rob Clark <rob.clark@linaro.org>,
	Kyungmin Park <kyungmin.park@samsung.com>,
	Tomi Valkeinen <tomi.valkeinen@ti.com>,
	Benjamin Gaignard <benjamin.gaignard@linaro.org>,
	Bryan Wu <bryan.wu@canonical.com>,
	Maxime Ripard <maxime.ripard@free-electrons.com>,
	Vikas Sajjan <vikas.sajjan@linaro.org>,
	Sumit Semwal <sumit.semwal@linaro.org>,
	Sebastien Guiriec <s-guiriec@ti.com>, linux-media@vger.kernel.org
X-BeenThere: dri-devel@lists.freedesktop.org
X-Mailman-Version: 2.1.13
Precedence: list
List-Id: Direct Rendering Infrastructure - Development
	<dri-devel.lists.freedesktop.org>
List-Unsubscribe: <http://lists.freedesktop.org/mailman/options/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=unsubscribe>
List-Archive: <http://lists.freedesktop.org/archives/dri-devel>
List-Post: <mailto:dri-devel@lists.freedesktop.org>
List-Help: <mailto:dri-devel-request@lists.freedesktop.org?subject=help>
List-Subscribe: <http://lists.freedesktop.org/mailman/listinfo/dri-devel>,
	<mailto:dri-devel-request@lists.freedesktop.org?subject=subscribe>
MIME-Version: 1.0
Sender: 
 dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org
Errors-To: 
 dri-devel-bounces+patchwork-dri-devel=patchwork.kernel.org@lists.freedesktop.org

From: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com>

Signed-off-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
---
 drivers/video/display/Kconfig     |   13 +++
 drivers/video/display/Makefile    |    1 +
 drivers/video/display/panel-dpi.c |  147 +++++++++++++++++++++++++++++++++++++
 include/video/panel-dpi.h         |   24 ++++++
 4 files changed, 185 insertions(+), 0 deletions(-)
 create mode 100644 drivers/video/display/panel-dpi.c
 create mode 100644 include/video/panel-dpi.h

diff --git a/drivers/video/display/Kconfig b/drivers/video/display/Kconfig
index 1d533e7..0f9b990 100644
--- a/drivers/video/display/Kconfig
+++ b/drivers/video/display/Kconfig
@@ -2,3 +2,16 @@ menuconfig DISPLAY_CORE
 	tristate "Display Core"
 	---help---
 	  Support common display framework for graphics devices.
+
+if DISPLAY_CORE
+
+config DISPLAY_PANEL_DPI
+	tristate "DPI (Parallel) Display Panels"
+	---help---
+	  Support for simple digital (parallel) pixel interface panels. Those
+	  panels receive pixel data through a parallel bus and have no control
+	  bus.
+
+	  If you are in doubt, say N.
+
+endif # DISPLAY_CORE
diff --git a/drivers/video/display/Makefile b/drivers/video/display/Makefile
index bd93496..47978d4 100644
--- a/drivers/video/display/Makefile
+++ b/drivers/video/display/Makefile
@@ -1 +1,2 @@
 obj-$(CONFIG_DISPLAY_CORE) += display-core.o
+obj-$(CONFIG_DISPLAY_PANEL_DPI) += panel-dpi.o
diff --git a/drivers/video/display/panel-dpi.c b/drivers/video/display/panel-dpi.c
new file mode 100644
index 0000000..c56197a
--- /dev/null
+++ b/drivers/video/display/panel-dpi.c
@@ -0,0 +1,147 @@
+/*
+ * DPI Display Panel
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <video/display.h>
+#include <video/panel-dpi.h>
+
+struct panel_dpi {
+	struct display_entity entity;
+	const struct panel_dpi_platform_data *pdata;
+};
+
+#define to_panel_dpi(p)		container_of(p, struct panel_dpi, entity)
+
+static const struct display_entity_interface_params panel_dpi_params = {
+	.type = DISPLAY_ENTITY_INTERFACE_DPI,
+};
+
+static int panel_dpi_set_state(struct display_entity *entity,
+			       enum display_entity_state state)
+{
+	switch (state) {
+	case DISPLAY_ENTITY_STATE_OFF:
+	case DISPLAY_ENTITY_STATE_STANDBY:
+		display_entity_set_stream(entity->source,
+					  DISPLAY_ENTITY_STREAM_STOPPED);
+		break;
+
+	case DISPLAY_ENTITY_STATE_ON:
+		display_entity_set_stream(entity->source,
+					  DISPLAY_ENTITY_STREAM_CONTINUOUS);
+		break;
+	}
+
+	return 0;
+}
+
+static int panel_dpi_get_modes(struct display_entity *entity,
+			       const struct videomode **modes)
+{
+	struct panel_dpi *panel = to_panel_dpi(entity);
+
+	*modes = panel->pdata->mode;
+	return 1;
+}
+
+static int panel_dpi_get_size(struct display_entity *entity,
+			      unsigned int *width, unsigned int *height)
+{
+	struct panel_dpi *panel = to_panel_dpi(entity);
+
+	*width = panel->pdata->width;
+	*height = panel->pdata->height;
+	return 0;
+}
+
+static int panel_dpi_get_params(struct display_entity *entity,
+				struct display_entity_interface_params *params)
+{
+	*params = panel_dpi_params;
+	return 0;
+}
+
+static const struct display_entity_control_ops panel_dpi_control_ops = {
+	.set_state = panel_dpi_set_state,
+	.get_modes = panel_dpi_get_modes,
+	.get_size = panel_dpi_get_size,
+	.get_params = panel_dpi_get_params,
+};
+
+static void panel_dpi_release(struct display_entity *entity)
+{
+	struct panel_dpi *panel = to_panel_dpi(entity);
+
+	kfree(panel);
+}
+
+static int panel_dpi_remove(struct platform_device *pdev)
+{
+	struct panel_dpi *panel = platform_get_drvdata(pdev);
+
+	platform_set_drvdata(pdev, NULL);
+	display_entity_unregister(&panel->entity);
+
+	return 0;
+}
+
+static int __devinit panel_dpi_probe(struct platform_device *pdev)
+{
+	const struct panel_dpi_platform_data *pdata = pdev->dev.platform_data;
+	struct panel_dpi *panel;
+	int ret;
+
+	if (pdata == NULL)
+		return -ENODEV;
+
+	panel = kzalloc(sizeof(*panel), GFP_KERNEL);
+	if (panel == NULL)
+		return -ENOMEM;
+
+	panel->pdata = pdata;
+	panel->entity.dev = &pdev->dev;
+	panel->entity.release = panel_dpi_release;
+	panel->entity.ops.ctrl = &panel_dpi_control_ops;
+
+	ret = display_entity_register(&panel->entity);
+	if (ret < 0) {
+		kfree(panel);
+		return ret;
+	}
+
+	platform_set_drvdata(pdev, panel);
+
+	return 0;
+}
+
+static const struct dev_pm_ops panel_dpi_dev_pm_ops = {
+};
+
+static struct platform_driver panel_dpi_driver = {
+	.probe = panel_dpi_probe,
+	.remove = panel_dpi_remove,
+	.driver = {
+		.name = "panel_dpi",
+		.owner = THIS_MODULE,
+		.pm = &panel_dpi_dev_pm_ops,
+	},
+};
+
+module_platform_driver(panel_dpi_driver);
+
+MODULE_AUTHOR("Laurent Pinchart <laurent.pinchart@ideasonboard.com>");
+MODULE_DESCRIPTION("DPI Display Panel");
+MODULE_LICENSE("GPL");
diff --git a/include/video/panel-dpi.h b/include/video/panel-dpi.h
new file mode 100644
index 0000000..0547b4a
--- /dev/null
+++ b/include/video/panel-dpi.h
@@ -0,0 +1,24 @@
+/*
+ * DPI Display Panel
+ *
+ * Copyright (C) 2012 Renesas Solutions Corp.
+ *
+ * Contacts: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License version 2 as
+ * published by the Free Software Foundation.
+ */
+
+#ifndef __PANEL_DPI_H__
+#define __PANEL_DPI_H__
+
+#include <linux/videomode.h>
+
+struct panel_dpi_platform_data {
+	unsigned long width;		/* Panel width in mm */
+	unsigned long height;		/* Panel height in mm */
+	const struct videomode *mode;
+};
+
+#endif /* __PANEL_DPI_H__ */