lkml.org 
[lkml]   [2013]   [Oct]   [14]   [last100]   RSS Feed
Views: [wrap][no wrap]   [headers]  [forward] 
 
Messages in this thread
Patch in this message
/
From
Subject[PATCH 3/3] omapdss: Add OPA362 analog video amplifier driver.
Date
This driver add handlign for opa362 chip which is
video amplifier with internal gain and filter. Enable/disable is
controlled via single gpio. This driver was tested on gta04 board.

Signed-off-by: Marek Belisko <marek@goldelico.com>
Signed-off-by: H. Nikolaus Schaller <hns@goldelico.com>
---
drivers/video/omap2/displays-new/Kconfig | 6 +
drivers/video/omap2/displays-new/Makefile | 1 +
.../video/omap2/displays-new/amplifier-opa362.c | 294 +++++++++++++++++++++
include/video/omap-panel-data.h | 17 ++
4 files changed, 318 insertions(+)
create mode 100644 drivers/video/omap2/displays-new/amplifier-opa362.c

diff --git a/drivers/video/omap2/displays-new/Kconfig b/drivers/video/omap2/displays-new/Kconfig
index 6c90885..5097640 100644
--- a/drivers/video/omap2/displays-new/Kconfig
+++ b/drivers/video/omap2/displays-new/Kconfig
@@ -1,6 +1,12 @@
menu "OMAP Display Device Drivers (new device model)"
depends on OMAP2_DSS

+config DISPLAY_AMPLIFIER_OPA362
+ tristate "Analog amplifier with output disable/high-Z"
+ help
+ Driver to enable an external analog TV amplifier (e.g. OPA362)
+ through a GPIO.
+
config DISPLAY_ENCODER_TFP410
tristate "TFP410 DPI to DVI Encoder"
help
diff --git a/drivers/video/omap2/displays-new/Makefile b/drivers/video/omap2/displays-new/Makefile
index 5aeb11b..2e8af8f 100644
--- a/drivers/video/omap2/displays-new/Makefile
+++ b/drivers/video/omap2/displays-new/Makefile
@@ -1,3 +1,4 @@
+obj-$(CONFIG_DISPLAY_AMPLIFIER_OPA362) += amplifier-opa362.o
obj-$(CONFIG_DISPLAY_ENCODER_TFP410) += encoder-tfp410.o
obj-$(CONFIG_DISPLAY_ENCODER_TPD12S015) += encoder-tpd12s015.o
obj-$(CONFIG_DISPLAY_CONNECTOR_DVI) += connector-dvi.o
diff --git a/drivers/video/omap2/displays-new/amplifier-opa362.c b/drivers/video/omap2/displays-new/amplifier-opa362.c
new file mode 100644
index 0000000..677499c
--- /dev/null
+++ b/drivers/video/omap2/displays-new/amplifier-opa362.c
@@ -0,0 +1,294 @@
+/*
+ * OPA362 analog video amplifier with output/power control
+ *
+ * Copyright (C) 2013 Golden Delicious Computers
+ * Author: H. Nikolaus Schaller <hns@goldelico.com>
+ *
+ * based on encoder-tfp410
+ *
+ * Copyright (C) 2013 Texas Instruments
+ * Author: Tomi Valkeinen <tomi.valkeinen@ti.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/gpio.h>
+#include <linux/module.h>
+#include <linux/platform_device.h>
+#include <linux/slab.h>
+
+#include <video/omapdss.h>
+#include <video/omap-panel-data.h>
+
+struct panel_drv_data {
+ struct omap_dss_device dssdev;
+ struct omap_dss_device *in;
+
+ int enable_gpio;
+ bool bypass;
+ bool acbias;
+
+ struct omap_video_timings timings;
+};
+
+#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
+
+static int opa362_connect(struct omap_dss_device *dssdev,
+ struct omap_dss_device *dst)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+ int r;
+
+ if (omapdss_device_is_connected(dssdev))
+ return -EBUSY;
+
+ r = in->ops.atv->connect(in, dssdev);
+ if (r)
+ return r;
+
+ dst->src = dssdev;
+ dssdev->dst = dst;
+
+ return 0;
+}
+
+static void opa362_disconnect(struct omap_dss_device *dssdev,
+ struct omap_dss_device *dst)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ WARN_ON(!omapdss_device_is_connected(dssdev));
+ if (!omapdss_device_is_connected(dssdev))
+ return;
+
+ WARN_ON(dst != dssdev->dst);
+ if (dst != dssdev->dst)
+ return;
+
+ dst->src = NULL;
+ dssdev->dst = NULL;
+
+ in->ops.atv->disconnect(in, &ddata->dssdev);
+}
+
+static int opa362_enable(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+ int r;
+
+ if (!omapdss_device_is_connected(dssdev))
+ return -ENODEV;
+
+ if (omapdss_device_is_enabled(dssdev))
+ return 0;
+
+ in->ops.atv->set_timings(in, &ddata->timings);
+ in->ops.atv->invert_vid_out_polarity(in, true);
+ in->ops.atv->bypass_and_acbias(in, ddata->bypass, ddata->acbias);
+
+ r = in->ops.atv->enable(in);
+ if (r)
+ return r;
+
+ if (gpio_is_valid(ddata->enable_gpio))
+ gpio_set_value_cansleep(ddata->enable_gpio, 1);
+
+ dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
+
+ return 0;
+}
+
+static void opa362_disable(struct omap_dss_device *dssdev)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ if (!omapdss_device_is_enabled(dssdev))
+ return;
+
+ if (gpio_is_valid(ddata->enable_gpio))
+ gpio_set_value_cansleep(ddata->enable_gpio, 0);
+
+ in->ops.atv->disable(in);
+
+ dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
+}
+
+static void opa362_set_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ ddata->timings = *timings;
+ dssdev->panel.timings = *timings;
+
+ in->ops.atv->set_timings(in, timings);
+}
+
+static void opa362_get_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+
+ *timings = ddata->timings;
+}
+
+static int opa362_check_timings(struct omap_dss_device *dssdev,
+ struct omap_video_timings *timings)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ return in->ops.atv->check_timings(in, timings);
+}
+
+static void opa362_set_type(struct omap_dss_device *dssdev,
+ enum omap_dss_venc_type type)
+{
+ /* we can only drive a COMPOSITE output */
+ WARN_ON(type != OMAP_DSS_VENC_TYPE_COMPOSITE);
+
+}
+
+static void opa362_invert_vid_out_polarity(struct omap_dss_device *dssdev,
+ bool invert_polarity)
+{
+ struct panel_drv_data *ddata = to_panel_data(dssdev);
+ struct omap_dss_device *in = ddata->in;
+
+ /* OPA362 inverts the polarity */
+ in->ops.atv->invert_vid_out_polarity(in, !invert_polarity);
+}
+
+static const struct omapdss_atv_ops opa362_atv_ops = {
+ .connect = opa362_connect,
+ .disconnect = opa362_disconnect,
+
+ .enable = opa362_enable,
+ .disable = opa362_disable,
+
+ .check_timings = opa362_check_timings,
+ .set_timings = opa362_set_timings,
+ .get_timings = opa362_get_timings,
+
+ .set_type = opa362_set_type,
+ .invert_vid_out_polarity = opa362_invert_vid_out_polarity,
+};
+
+static int opa362_probe_pdata(struct platform_device *pdev)
+{
+ struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+ struct amplifier_opa362_platform_data *pdata;
+ struct omap_dss_device *dssdev, *in;
+
+ pdata = dev_get_platdata(&pdev->dev);
+
+ ddata->enable_gpio = pdata->enable_gpio;
+ ddata->bypass = pdata->bypass;
+ ddata->acbias = pdata->acbias;
+
+ in = omap_dss_find_output(pdata->source);
+ if (in == NULL) {
+ dev_err(&pdev->dev, "Failed to find video source\n");
+ return -ENODEV;
+ }
+
+ ddata->in = in;
+
+ dssdev = &ddata->dssdev;
+ dssdev->name = pdata->name;
+
+ return 0;
+}
+
+static int opa362_probe(struct platform_device *pdev)
+{
+ struct panel_drv_data *ddata;
+ struct omap_dss_device *dssdev;
+ int r;
+
+ ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
+ if (!ddata)
+ return -ENOMEM;
+
+ platform_set_drvdata(pdev, ddata);
+
+ if (dev_get_platdata(&pdev->dev)) {
+ r = opa362_probe_pdata(pdev);
+ if (r)
+ return r;
+ } else {
+ return -ENODEV;
+ }
+
+ if (gpio_is_valid(ddata->enable_gpio)) {
+ r = devm_gpio_request_one(&pdev->dev, ddata->enable_gpio,
+ GPIOF_OUT_INIT_LOW, "opa362 enable");
+ if (r) {
+ dev_err(&pdev->dev, "Failed to request enable GPIO %d\n",
+ ddata->enable_gpio);
+ goto err_gpio;
+ }
+ }
+
+ dssdev = &ddata->dssdev;
+ dssdev->ops.atv = &opa362_atv_ops;
+ dssdev->dev = &pdev->dev;
+ dssdev->type = OMAP_DISPLAY_TYPE_VENC;
+ dssdev->output_type = OMAP_DISPLAY_TYPE_VENC;
+ dssdev->owner = THIS_MODULE;
+
+ r = omapdss_register_output(dssdev);
+ if (r) {
+ dev_err(&pdev->dev, "Failed to register output\n");
+ goto err_reg;
+ }
+
+ return 0;
+err_reg:
+err_gpio:
+ omap_dss_put_device(ddata->in);
+ return r;
+}
+
+static int __exit opa362_remove(struct platform_device *pdev)
+{
+ struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+ struct omap_dss_device *dssdev = &ddata->dssdev;
+ struct omap_dss_device *in = ddata->in;
+
+ omapdss_unregister_output(&ddata->dssdev);
+
+ WARN_ON(omapdss_device_is_enabled(dssdev));
+ if (omapdss_device_is_enabled(dssdev))
+ opa362_disable(dssdev);
+
+ WARN_ON(omapdss_device_is_connected(dssdev));
+ if (omapdss_device_is_connected(dssdev))
+ opa362_disconnect(dssdev, dssdev->dst);
+
+ omap_dss_put_device(in);
+
+ return 0;
+}
+
+static struct platform_driver opa362_driver = {
+ .probe = opa362_probe,
+ .remove = __exit_p(opa362_remove),
+ .driver = {
+ .name = "amplifier-opa362",
+ .owner = THIS_MODULE,
+ },
+};
+
+module_platform_driver(opa362_driver);
+
+MODULE_AUTHOR("H. Nikolaus Schaller <hns@goldelico.com>");
+MODULE_DESCRIPTION("OPA362 analog video amplifier with output/power control");
+MODULE_LICENSE("GPL");
diff --git a/include/video/omap-panel-data.h b/include/video/omap-panel-data.h
index f7ac8d9..e1b3c13 100644
--- a/include/video/omap-panel-data.h
+++ b/include/video/omap-panel-data.h
@@ -33,6 +33,23 @@
struct omap_dss_device;

/**
+ * amplifier_opa362_platform_data platform data
+ * @name: name for this display entity
+ * @source: name of the display entity used as a video source
+ * @enable_gpio: gpio number for enable pin (or -1 if not available - but
+ * then you don't need this driver)
+ * @bypass: enable TV bypass mode for external video driver
+ * @acbias: AC coupling to remove DC offset
+ */
+struct amplifier_opa362_platform_data {
+ const char *name;
+ const char *source;
+ int enable_gpio;
+ bool bypass;
+ bool acbias;
+};
+
+/**
* encoder_tfp410 platform data
* @name: name for this display entity
* @power_down_gpio: gpio number for PD pin (or -1 if not available)
--
1.8.1.2


\
 
 \ /
  Last update: 2013-10-14 23:21    [W:0.129 / U:1.044 seconds]
©2003-2020 Jasper Spaans|hosted at Digital Ocean and TransIP|Read the blog|Advertise on this site