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Release 4.11 drivers/gpu/drm/omapdrm/displays/connector-dvi.c

/*
 * Generic DVI Connector driver
 *
 * 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/i2c.h>
#include <linux/module.h>
#include <linux/platform_device.h>
#include <linux/slab.h>

#include <drm/drm_edid.h>
#include <video/omap-panel-data.h>

#include "../dss/omapdss.h"


static const struct videomode dvic_default_vm = {
	.hactive	= 640,
	.vactive	= 480,

	.pixelclock	= 23500000,

	.hfront_porch	= 48,
	.hsync_len	= 32,
	.hback_porch	= 80,

	.vfront_porch	= 3,
	.vsync_len	= 4,
	.vback_porch	= 7,

	.flags		= DISPLAY_FLAGS_HSYNC_HIGH | DISPLAY_FLAGS_VSYNC_HIGH |
			  DISPLAY_FLAGS_SYNC_NEGEDGE | DISPLAY_FLAGS_DE_HIGH |
			  DISPLAY_FLAGS_PIXDATA_POSEDGE,
};


struct panel_drv_data {
	
struct omap_dss_device dssdev;
	
struct omap_dss_device *in;

	
struct videomode vm;

	
struct i2c_adapter *i2c_adapter;
};


#define to_panel_data(x) container_of(x, struct panel_drv_data, dssdev)


static int dvic_connect(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 0; r = in->ops.dvi->connect(in, dssdev); if (r) return r; return 0; }

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Tomi Valkeinen68100.00%1100.00%
Total68100.00%1100.00%


static void dvic_disconnect(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_connected(dssdev)) return; in->ops.dvi->disconnect(in, dssdev); }

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Tomi Valkeinen52100.00%1100.00%
Total52100.00%1100.00%


static int dvic_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.dvi->set_timings(in, &ddata->vm); r = in->ops.dvi->enable(in); if (r) return r; dssdev->state = OMAP_DSS_DISPLAY_ACTIVE; return 0; }

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Tomi Valkeinen9999.00%150.00%
Peter Ujfalusi11.00%150.00%
Total100100.00%2100.00%


static void dvic_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; in->ops.dvi->disable(in); dssdev->state = OMAP_DSS_DISPLAY_DISABLED; }

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Tomi Valkeinen56100.00%1100.00%
Total56100.00%1100.00%


static void dvic_set_timings(struct omap_dss_device *dssdev, struct videomode *vm) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; ddata->vm = *vm; dssdev->panel.vm = *vm; in->ops.dvi->set_timings(in, vm); }

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PersonTokensPropCommitsCommitProp
Tomi Valkeinen5789.06%133.33%
Peter Ujfalusi710.94%266.67%
Total64100.00%3100.00%


static void dvic_get_timings(struct omap_dss_device *dssdev, struct videomode *vm) { struct panel_drv_data *ddata = to_panel_data(dssdev); *vm = ddata->vm; }

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Tomi Valkeinen2987.88%133.33%
Peter Ujfalusi412.12%266.67%
Total33100.00%3100.00%


static int dvic_check_timings(struct omap_dss_device *dssdev, struct videomode *vm) { struct panel_drv_data *ddata = to_panel_data(dssdev); struct omap_dss_device *in = ddata->in; return in->ops.dvi->check_timings(in, vm); }

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Tomi Valkeinen4693.88%133.33%
Peter Ujfalusi36.12%266.67%
Total49100.00%3100.00%


static int dvic_ddc_read(struct i2c_adapter *adapter, unsigned char *buf, u16 count, u8 offset) { int r, retries; for (retries = 3; retries > 0; retries--) { struct i2c_msg msgs[] = { { .addr = DDC_ADDR, .flags = 0, .len = 1, .buf = &offset, }, { .addr = DDC_ADDR, .flags = I2C_M_RD, .len = count, .buf = buf, } }; r = i2c_transfer(adapter, msgs, 2); if (r == 2) return 0; if (r != -EAGAIN) break; } return r < 0 ? r : -EIO; }

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Tomi Valkeinen132100.00%1100.00%
Total132100.00%1100.00%


static int dvic_read_edid(struct omap_dss_device *dssdev, u8 *edid, int len) { struct panel_drv_data *ddata = to_panel_data(dssdev); int r, l, bytes_read; if (!ddata->i2c_adapter) return -ENODEV; l = min(EDID_LENGTH, len); r = dvic_ddc_read(ddata->i2c_adapter, edid, l, 0); if (r) return r; bytes_read = l; /* if there are extensions, read second block */ if (len > EDID_LENGTH && edid[0x7e] > 0) { l = min(EDID_LENGTH, len - EDID_LENGTH); r = dvic_ddc_read(ddata->i2c_adapter, edid + EDID_LENGTH, l, EDID_LENGTH); if (r) return r; bytes_read += l; } return bytes_read; }

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Tomi Valkeinen139100.00%1100.00%
Total139100.00%1100.00%


static bool dvic_detect(struct omap_dss_device *dssdev) { struct panel_drv_data *ddata = to_panel_data(dssdev); unsigned char out; int r; if (!ddata->i2c_adapter) return true; r = dvic_ddc_read(ddata->i2c_adapter, &out, 1, 0); return r == 0; }

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Tomi Valkeinen59100.00%1100.00%
Total59100.00%1100.00%

static struct omap_dss_driver dvic_driver = { .connect = dvic_connect, .disconnect = dvic_disconnect, .enable = dvic_enable, .disable = dvic_disable, .set_timings = dvic_set_timings, .get_timings = dvic_get_timings, .check_timings = dvic_check_timings, .get_resolution = omapdss_default_get_resolution, .read_edid = dvic_read_edid, .detect = dvic_detect, };
static int dvic_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; struct device_node *adapter_node; struct i2c_adapter *adapter; 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; adapter_node = of_parse_phandle(node, "ddc-i2c-bus", 0); if (adapter_node) { adapter = of_get_i2c_adapter_by_node(adapter_node); of_node_put(adapter_node); if (adapter == NULL) { dev_err(&pdev->dev, "failed to parse ddc-i2c-bus\n"); omap_dss_put_device(ddata->in); return -EPROBE_DEFER; } ddata->i2c_adapter = adapter; } return 0; }

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Tomi Valkeinen14696.05%133.33%
Peter Chen53.29%133.33%
Vladimir Zapolskiy10.66%133.33%
Total152100.00%3100.00%


static int dvic_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 (!pdev->dev.of_node) return -ENODEV; r = dvic_probe_of(pdev); if (r) return r; ddata->vm = dvic_default_vm; dssdev = &ddata->dssdev; dssdev->driver = &dvic_driver; dssdev->dev = &pdev->dev; dssdev->type = OMAP_DISPLAY_TYPE_DVI; dssdev->owner = THIS_MODULE; dssdev->panel.vm = dvic_default_vm; r = omapdss_register_display(dssdev); if (r) { dev_err(&pdev->dev, "Failed to register panel\n"); goto err_reg; } return 0; err_reg: omap_dss_put_device(ddata->in); i2c_put_adapter(ddata->i2c_adapter); return r; }

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Tomi Valkeinen17897.80%583.33%
Peter Ujfalusi42.20%116.67%
Total182100.00%6100.00%


static int __exit dvic_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_display(&ddata->dssdev); dvic_disable(dssdev); dvic_disconnect(dssdev); omap_dss_put_device(in); i2c_put_adapter(ddata->i2c_adapter); return 0; }

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PersonTokensPropCommitsCommitProp
Tomi Valkeinen74100.00%1100.00%
Total74100.00%1100.00%

static const struct of_device_id dvic_of_match[] = { { .compatible = "omapdss,dvi-connector", }, {}, }; MODULE_DEVICE_TABLE(of, dvic_of_match); static struct platform_driver dvi_connector_driver = { .probe = dvic_probe, .remove = __exit_p(dvic_remove), .driver = { .name = "connector-dvi", .of_match_table = dvic_of_match, .suppress_bind_attrs = true, }, }; module_platform_driver(dvi_connector_driver); MODULE_AUTHOR("Tomi Valkeinen <tomi.valkeinen@ti.com>"); MODULE_DESCRIPTION("Generic DVI Connector driver"); MODULE_LICENSE("GPL");

Overall Contributors

PersonTokensPropCommitsCommitProp
Tomi Valkeinen137096.48%729.17%
Peter Ujfalusi443.10%1562.50%
Peter Chen50.35%14.17%
Vladimir Zapolskiy10.07%14.17%
Total1420100.00%24100.00%
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