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Message-Id: <1415830247-31633-2-git-send-email-marek@goldelico.com>
Date: Wed, 12 Nov 2014 23:10:43 +0100
From: Marek Belisko <marek@...delico.com>
To: robh+dt@...nel.org, pawel.moll@....com, mark.rutland@....com,
ijc+devicetree@...lion.org.uk, galak@...eaurora.org,
bcousson@...libre.com, tony@...mide.com, linux@....linux.org.uk,
tomi.valkeinen@...com, plagnioj@...osoft.com,
grant.likely@...aro.org
Cc: devicetree@...r.kernel.org, linux-kernel@...r.kernel.org,
linux-omap@...r.kernel.org, linux-arm-kernel@...ts.infradead.org,
linux-fbdev@...r.kernel.org, hns@...delico.com,
gta04-owner@...delico.com, Marek Belisko <marek@...delico.com>
Subject: [PATCH v2 1/5] video: omapdss: Add opa362 driver
opa362 is amplifier for video and can be connected to the tvout pads
of the OMAP3. It has one gpio control for enable/disable of the output
(high impedance).
Signed-off-by: H. Nikolaus Schaller <hns@...delico.com>
---
drivers/video/fbdev/omap2/displays-new/Kconfig | 6 +
drivers/video/fbdev/omap2/displays-new/Makefile | 1 +
.../fbdev/omap2/displays-new/amplifier-opa362.c | 343 +++++++++++++++++++++
include/video/omap-panel-data.h | 12 +
4 files changed, 362 insertions(+)
create mode 100644 drivers/video/fbdev/omap2/displays-new/amplifier-opa362.c
diff --git a/drivers/video/fbdev/omap2/displays-new/Kconfig b/drivers/video/fbdev/omap2/displays-new/Kconfig
index e6cfc38..211b3ec 100644
--- a/drivers/video/fbdev/omap2/displays-new/Kconfig
+++ b/drivers/video/fbdev/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 "external analog amplifier with output disable/high-Z (e.g. OPA362)"
+ 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/fbdev/omap2/displays-new/Makefile b/drivers/video/fbdev/omap2/displays-new/Makefile
index 0323a8a..b311542 100644
--- a/drivers/video/fbdev/omap2/displays-new/Makefile
+++ b/drivers/video/fbdev/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/fbdev/omap2/displays-new/amplifier-opa362.c b/drivers/video/fbdev/omap2/displays-new/amplifier-opa362.c
new file mode 100644
index 0000000..8065a28
--- /dev/null
+++ b/drivers/video/fbdev/omap2/displays-new/amplifier-opa362.c
@@ -0,0 +1,343 @@
+/*
+ * OPA362 analog video amplifier with output/power control
+ *
+ * Copyright (C) 2014 Golden Delicious Computers
+ * Author: H. Nikolaus Schaller <hns@...delico.com>
+ *
+ * based on encoder-tfp410
+ *
+ * Copyright (C) 2013 Texas Instruments
+ * Author: Tomi Valkeinen <tomi.valkeinen@...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 <linux/of_gpio.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;
+
+ 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;
+
+ dev_dbg(dssdev->dev, "connect\n");
+
+ 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;
+
+ dev_dbg(dssdev->dev, "disconnect\n");
+
+ 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;
+
+ dev_dbg(dssdev->dev, "enable\n");
+
+ if (!omapdss_device_is_connected(dssdev))
+ return -ENODEV;
+
+ if (omapdss_device_is_enabled(dssdev))
+ return 0;
+
+ in->ops.atv->set_timings(in, &ddata->timings);
+ /* fixme: should we receive the invert from our consumer, i.e. the connector? */
+ in->ops.atv->invert_vid_out_polarity(in, true);
+
+ 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;
+
+ dev_dbg(dssdev->dev, "disable\n");
+
+ 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;
+
+ dev_dbg(dssdev->dev, "set_timings\n");
+
+ 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);
+
+ dev_dbg(dssdev->dev, "get_timings\n");
+
+ *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;
+
+ dev_dbg(dssdev->dev, "check_timings\n");
+
+ 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;
+
+ 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_of(struct platform_device *pdev)
+{
+ struct panel_drv_data *ddata = platform_get_drvdata(pdev);
+ struct device_node *node = pdev->dev.of_node;
+ struct omap_dss_device *in;
+ int gpio;
+
+ gpio = of_get_gpio(node, 0);
+
+ if (gpio_is_valid(gpio) || gpio == -ENOENT) {
+ ddata->enable_gpio = gpio;
+ } else {
+ dev_err(&pdev->dev, "failed to parse enable gpio\n");
+ return gpio;
+ }
+
+ in = omapdss_of_find_source_for_first_ep(node);
+ if (IS_ERR(in)) {
+ dev_err(&pdev->dev, "failed to find video source\n");
+ return PTR_ERR(in);
+ }
+
+ ddata->in = in;
+
+ return 0;
+}
+
+static int opa362_probe(struct platform_device *pdev)
+{
+ struct panel_drv_data *ddata;
+ struct omap_dss_device *dssdev;
+ int r;
+
+ dev_dbg(&pdev->dev, "probe\n");
+
+ 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 {
+ r = opa362_probe_of(pdev);
+ if (r)
+ return r;
+ }
+
+ 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 const struct of_device_id opa362_of_match[] = {
+ { .compatible = "omapdss,ti,opa362", },
+ {},
+};
+MODULE_DEVICE_TABLE(of, opa362_of_match);
+
+static struct platform_driver opa362_driver = {
+ .probe = opa362_probe,
+ .remove = __exit_p(opa362_remove),
+ .driver = {
+ .name = "amplifier-opa362",
+ .owner = THIS_MODULE,
+ .of_match_table = opa362_of_match,
+ },
+};
+
+module_platform_driver(opa362_driver);
+
+MODULE_AUTHOR("H. Nikolaus Schaller <hns@...delico.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 69279c0..5c3076c 100644
--- a/include/video/omap-panel-data.h
+++ b/include/video/omap-panel-data.h
@@ -251,4 +251,16 @@ struct panel_tpo_td028ttec1_platform_data {
int data_lines;
};
+/**
+ * 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 pi
+ */
+struct amplifier_opa362_platform_data {
+ const char *name;
+ const char *source;
+ int enable_gpio;
+};
+
#endif /* __OMAP_PANEL_DATA_H */
--
1.9.1
--
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