mirror of https://gitee.com/openkylin/linux.git
OMAPDSS: Add new TPD12S015 Encoder driver
Add TPD12S015 HDMI ESD protection and level shifter encoder driver which uses the new DSS device model and DSS ops. Signed-off-by: Tomi Valkeinen <tomi.valkeinen@ti.com>
This commit is contained in:
Tomi Valkeinen
parent
2773fefbd7
commit
a0ee577fa2
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@ -6,4 +6,10 @@ config DISPLAY_ENCODER_TFP410
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help
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Driver for TFP410 DPI to DVI encoder.
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config DISPLAY_ENCODER_TPD12S015
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tristate "TPD12S015 HDMI ESD protection and level shifter"
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help
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Driver for TPD12S015, which offers HDMI ESD protection and level
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shifting.
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endmenu
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@ -1 +1,2 @@
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obj-$(CONFIG_DISPLAY_ENCODER_TFP410) += encoder-tfp410.o
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obj-$(CONFIG_DISPLAY_ENCODER_TPD12S015) += encoder-tpd12s015.o
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@ -0,0 +1,395 @@
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/*
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* TPD12S015 HDMI ESD protection & level shifter chip driver
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*
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* Copyright (C) 2013 Texas Instruments
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* Author: Tomi Valkeinen <tomi.valkeinen@ti.com>
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*
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* This program is free software; you can redistribute it and/or modify it
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* under the terms of the GNU General Public License version 2 as published by
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* the Free Software Foundation.
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*/
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#include <linux/completion.h>
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#include <linux/delay.h>
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#include <linux/module.h>
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#include <linux/slab.h>
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#include <linux/gpio.h>
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#include <linux/platform_device.h>
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#include <video/omapdss.h>
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#include <video/omap-panel-data.h>
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struct panel_drv_data {
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struct omap_dss_device dssdev;
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struct omap_dss_device *in;
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int ct_cp_hpd_gpio;
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int ls_oe_gpio;
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int hpd_gpio;
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struct omap_video_timings timings;
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struct completion hpd_completion;
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};
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#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)
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static irqreturn_t tpd_hpd_irq_handler(int irq, void *data)
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{
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struct panel_drv_data *ddata = data;
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bool hpd;
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hpd = gpio_get_value_cansleep(ddata->hpd_gpio);
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dev_dbg(ddata->dssdev.dev, "hpd %d\n", hpd);
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if (gpio_is_valid(ddata->ls_oe_gpio)) {
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if (hpd)
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gpio_set_value_cansleep(ddata->ls_oe_gpio, 1);
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else
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gpio_set_value_cansleep(ddata->ls_oe_gpio, 0);
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}
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complete_all(&ddata->hpd_completion);
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return IRQ_HANDLED;
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}
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static int tpd_connect(struct omap_dss_device *dssdev,
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struct omap_dss_device *dst)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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int r;
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r = in->ops.hdmi->connect(in, dssdev);
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if (r)
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return r;
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dst->output = dssdev;
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dssdev->device = dst;
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INIT_COMPLETION(ddata->hpd_completion);
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gpio_set_value_cansleep(ddata->ct_cp_hpd_gpio, 1);
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/* DC-DC converter needs at max 300us to get to 90% of 5V */
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udelay(300);
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/*
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* If there's a cable connected, wait for the hpd irq to trigger,
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* which turns on the level shifters.
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*/
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if (gpio_get_value_cansleep(ddata->hpd_gpio)) {
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unsigned long to;
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to = wait_for_completion_timeout(&ddata->hpd_completion,
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msecs_to_jiffies(250));
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WARN_ON_ONCE(to == 0);
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}
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return 0;
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}
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static void tpd_disconnect(struct omap_dss_device *dssdev,
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struct omap_dss_device *dst)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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WARN_ON(dst != dssdev->device);
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if (dst != dssdev->device)
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return;
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gpio_set_value_cansleep(ddata->ct_cp_hpd_gpio, 0);
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dst->output = NULL;
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dssdev->device = NULL;
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in->ops.hdmi->disconnect(in, &ddata->dssdev);
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}
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static int tpd_enable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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int r;
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if (dssdev->state == OMAP_DSS_DISPLAY_ACTIVE)
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return 0;
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in->ops.hdmi->set_timings(in, &ddata->timings);
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r = in->ops.hdmi->enable(in);
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if (r)
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return r;
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dssdev->state = OMAP_DSS_DISPLAY_ACTIVE;
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return r;
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}
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static void tpd_disable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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if (dssdev->state != OMAP_DSS_DISPLAY_ACTIVE)
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return;
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in->ops.hdmi->disable(in);
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dssdev->state = OMAP_DSS_DISPLAY_DISABLED;
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}
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static void tpd_set_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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ddata->timings = *timings;
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dssdev->panel.timings = *timings;
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in->ops.hdmi->set_timings(in, timings);
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}
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static void tpd_get_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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*timings = ddata->timings;
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}
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static int tpd_check_timings(struct omap_dss_device *dssdev,
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struct omap_video_timings *timings)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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int r;
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r = in->ops.hdmi->check_timings(in, timings);
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return r;
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}
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static int tpd_read_edid(struct omap_dss_device *dssdev,
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u8 *edid, int len)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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if (!gpio_get_value_cansleep(ddata->hpd_gpio))
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return -ENODEV;
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return in->ops.hdmi->read_edid(in, edid, len);
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}
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static bool tpd_detect(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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return gpio_get_value_cansleep(ddata->hpd_gpio);
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}
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static int tpd_audio_enable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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return in->ops.hdmi->audio_enable(in);
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}
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static void tpd_audio_disable(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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in->ops.hdmi->audio_disable(in);
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}
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static int tpd_audio_start(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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return in->ops.hdmi->audio_start(in);
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}
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static void tpd_audio_stop(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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in->ops.hdmi->audio_stop(in);
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}
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static bool tpd_audio_supported(struct omap_dss_device *dssdev)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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return in->ops.hdmi->audio_supported(in);
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}
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static int tpd_audio_config(struct omap_dss_device *dssdev,
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struct omap_dss_audio *audio)
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{
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struct panel_drv_data *ddata = to_panel_data(dssdev);
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struct omap_dss_device *in = ddata->in;
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return in->ops.hdmi->audio_config(in, audio);
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}
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static const struct omapdss_hdmi_ops tpd_hdmi_ops = {
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.connect = tpd_connect,
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.disconnect = tpd_disconnect,
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.enable = tpd_enable,
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.disable = tpd_disable,
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.check_timings = tpd_check_timings,
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.set_timings = tpd_set_timings,
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.get_timings = tpd_get_timings,
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.read_edid = tpd_read_edid,
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.detect = tpd_detect,
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.audio_enable = tpd_audio_enable,
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.audio_disable = tpd_audio_disable,
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.audio_start = tpd_audio_start,
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.audio_stop = tpd_audio_stop,
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.audio_supported = tpd_audio_supported,
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.audio_config = tpd_audio_config,
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};
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static int tpd_probe_pdata(struct platform_device *pdev)
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{
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struct panel_drv_data *ddata = platform_get_drvdata(pdev);
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struct encoder_tpd12s015_platform_data *pdata;
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struct omap_dss_device *dssdev, *in;
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pdata = dev_get_platdata(&pdev->dev);
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ddata->ct_cp_hpd_gpio = pdata->ct_cp_hpd_gpio;
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ddata->ls_oe_gpio = pdata->ls_oe_gpio;
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ddata->hpd_gpio = pdata->hpd_gpio;
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in = omap_dss_find_output(pdata->source);
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if (in == NULL) {
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dev_err(&pdev->dev, "Failed to find video source\n");
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return -ENODEV;
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}
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ddata->in = in;
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dssdev = &ddata->dssdev;
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dssdev->name = pdata->name;
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return 0;
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}
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static int tpd_probe(struct platform_device *pdev)
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{
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struct omap_dss_device *in, *dssdev;
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struct panel_drv_data *ddata;
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int r;
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ddata = devm_kzalloc(&pdev->dev, sizeof(*ddata), GFP_KERNEL);
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if (!ddata)
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return -ENOMEM;
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platform_set_drvdata(pdev, ddata);
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init_completion(&ddata->hpd_completion);
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if (dev_get_platdata(&pdev->dev)) {
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r = tpd_probe_pdata(pdev);
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if (r)
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return r;
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} else {
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return -ENODEV;
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}
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r = devm_gpio_request_one(&pdev->dev, ddata->ct_cp_hpd_gpio,
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GPIOF_OUT_INIT_LOW, "hdmi_ct_cp_hpd");
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if (r)
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goto err_gpio;
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if (gpio_is_valid(ddata->ls_oe_gpio)) {
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r = devm_gpio_request_one(&pdev->dev, ddata->ls_oe_gpio,
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GPIOF_OUT_INIT_LOW, "hdmi_ls_oe");
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if (r)
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goto err_gpio;
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}
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r = devm_gpio_request_one(&pdev->dev, ddata->hpd_gpio,
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GPIOF_DIR_IN, "hdmi_hpd");
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if (r)
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goto err_gpio;
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r = devm_request_threaded_irq(&pdev->dev, gpio_to_irq(ddata->hpd_gpio),
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NULL, tpd_hpd_irq_handler,
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IRQF_TRIGGER_RISING | IRQF_TRIGGER_FALLING |
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IRQF_ONESHOT, "hpd", ddata);
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if (r)
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goto err_irq;
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dssdev = &ddata->dssdev;
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dssdev->ops.hdmi = &tpd_hdmi_ops;
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dssdev->dev = &pdev->dev;
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dssdev->type = OMAP_DISPLAY_TYPE_HDMI;
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dssdev->output_type = OMAP_DISPLAY_TYPE_HDMI;
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dssdev->owner = THIS_MODULE;
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in = ddata->in;
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r = omapdss_register_output(dssdev);
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if (r) {
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dev_err(&pdev->dev, "Failed to register output\n");
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goto err_reg;
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}
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return 0;
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err_reg:
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err_irq:
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err_gpio:
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omap_dss_put_device(ddata->in);
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return r;
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}
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static int __exit tpd_remove(struct platform_device *pdev)
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{
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struct panel_drv_data *ddata = platform_get_drvdata(pdev);
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struct omap_dss_device *dssdev = &ddata->dssdev;
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struct omap_dss_device *in = ddata->in;
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omapdss_unregister_output(&ddata->dssdev);
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WARN_ON(omapdss_device_is_enabled(dssdev));
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if (omapdss_device_is_enabled(dssdev))
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tpd_disable(dssdev);
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WARN_ON(omapdss_device_is_connected(dssdev));
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if (omapdss_device_is_connected(dssdev))
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tpd_disconnect(dssdev, dssdev->device);
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omap_dss_put_device(in);
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return 0;
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}
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static struct platform_driver tpd_driver = {
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.probe = tpd_probe,
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.remove = __exit_p(tpd_remove),
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.driver = {
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.name = "tpd12s015",
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.owner = THIS_MODULE,
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},
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};
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module_platform_driver(tpd_driver);
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MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>");
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MODULE_DESCRIPTION("TPD12S015 driver");
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MODULE_LICENSE("GPL");
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@ -160,4 +160,20 @@ struct encoder_tfp410_platform_data {
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int data_lines;
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};
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/**
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* encoder_tpd12s015 platform data
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* @name: name for this display entity
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* @ct_cp_hpd_gpio: CT_CP_HPD gpio number
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* @ls_oe_gpio: LS_OE gpio number
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* @hpd_gpio: HPD gpio number
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*/
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struct encoder_tpd12s015_platform_data {
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const char *name;
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const char *source;
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int ct_cp_hpd_gpio;
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int ls_oe_gpio;
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int hpd_gpio;
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};
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#endif /* __OMAP_PANEL_DATA_H */
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