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Commit e190bfe5 authored by Francisco Jerez's avatar Francisco Jerez Committed by Dave Airlie
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drm: Import driver for the sil164 I2C TMDS transmitter. 



sil164 transmitters are used for DVI outputs on Intel/nvidia and ATI setups.

So far only nouveau can use this driver.

Signed-off-by: default avatarFrancisco Jerez <currojerez@riseup.net>
Tested-by: default avatarPatrice Mandin <patmandin@gmail.com>
Signed-off-by: default avatarDave Airlie <airlied@redhat.com>
parent a7b98b67

drivers/gpu/drm/i2c/Makefile

+3 −0
Original line number Diff line number Diff line
@@ -2,3 +2,6 @@ ccflags-y := -Iinclude/drm 


ch7006-y := ch7006_drv.o ch7006_mode.o

obj-$(CONFIG_DRM_I2C_CH7006) += ch7006.o



sil164-y := sil164_drv.o

obj-$(CONFIG_DRM_I2C_SIL164) += sil164.o

drivers/gpu/drm/i2c/sil164_drv.c

0 → 100644
+462 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2010 Francisco Jerez.

 * All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining

 * a copy of this software and associated documentation files (the

 * "Software"), to deal in the Software without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sublicense, and/or sell copies of the Software, and to

 * permit persons to whom the Software is furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice (including the

 * next paragraph) shall be included in all copies or substantial

 * portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE

 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 */



#include "drmP.h"

#include "drm_crtc_helper.h"

#include "drm_encoder_slave.h"

#include "i2c/sil164.h"



struct sil164_priv {

	struct sil164_encoder_params config;

	struct i2c_client *duallink_slave;



	uint8_t saved_state[0x10];

	uint8_t saved_slave_state[0x10];

};



#define to_sil164_priv(x) \

	((struct sil164_priv *)to_encoder_slave(x)->slave_priv)



#define sil164_dbg(client, format, ...) do {				\

		if (drm_debug & DRM_UT_KMS)				\

			dev_printk(KERN_DEBUG, &client->dev,		\

				   "%s: " format, __func__, ## __VA_ARGS__); \

	} while (0)

#define sil164_info(client, format, ...)		\

	dev_info(&client->dev, format, __VA_ARGS__)

#define sil164_err(client, format, ...)			\

	dev_err(&client->dev, format, __VA_ARGS__)



#define SIL164_I2C_ADDR_MASTER			0x38

#define SIL164_I2C_ADDR_SLAVE			0x39



/* HW register definitions */



#define SIL164_VENDOR_LO			0x0

#define SIL164_VENDOR_HI			0x1

#define SIL164_DEVICE_LO			0x2

#define SIL164_DEVICE_HI			0x3

#define SIL164_REVISION				0x4

#define SIL164_FREQ_MIN				0x6

#define SIL164_FREQ_MAX				0x7

#define SIL164_CONTROL0				0x8

#  define SIL164_CONTROL0_POWER_ON		0x01

#  define SIL164_CONTROL0_EDGE_RISING		0x02

#  define SIL164_CONTROL0_INPUT_24BIT		0x04

#  define SIL164_CONTROL0_DUAL_EDGE		0x08

#  define SIL164_CONTROL0_HSYNC_ON		0x10

#  define SIL164_CONTROL0_VSYNC_ON		0x20

#define SIL164_DETECT				0x9

#  define SIL164_DETECT_INTR_STAT		0x01

#  define SIL164_DETECT_HOTPLUG_STAT		0x02

#  define SIL164_DETECT_RECEIVER_STAT		0x04

#  define SIL164_DETECT_INTR_MODE_RECEIVER	0x00

#  define SIL164_DETECT_INTR_MODE_HOTPLUG	0x08

#  define SIL164_DETECT_OUT_MODE_HIGH		0x00

#  define SIL164_DETECT_OUT_MODE_INTR		0x10

#  define SIL164_DETECT_OUT_MODE_RECEIVER	0x20

#  define SIL164_DETECT_OUT_MODE_HOTPLUG	0x30

#  define SIL164_DETECT_VSWING_STAT		0x80

#define SIL164_CONTROL1				0xa

#  define SIL164_CONTROL1_DESKEW_ENABLE		0x10

#  define SIL164_CONTROL1_DESKEW_INCR_SHIFT	5

#define SIL164_GPIO				0xb

#define SIL164_CONTROL2				0xc

#  define SIL164_CONTROL2_FILTER_ENABLE		0x01

#  define SIL164_CONTROL2_FILTER_SETTING_SHIFT	1

#  define SIL164_CONTROL2_DUALLINK_MASTER	0x40

#  define SIL164_CONTROL2_SYNC_CONT		0x80

#define SIL164_DUALLINK				0xd

#  define SIL164_DUALLINK_ENABLE		0x10

#  define SIL164_DUALLINK_SKEW_SHIFT		5

#define SIL164_PLLZONE				0xe

#  define SIL164_PLLZONE_STAT			0x08

#  define SIL164_PLLZONE_FORCE_ON		0x10

#  define SIL164_PLLZONE_FORCE_HIGH		0x20



/* HW access functions */



static void

sil164_write(struct i2c_client *client, uint8_t addr, uint8_t val)

{

	uint8_t buf[] = {addr, val};

	int ret;



	ret = i2c_master_send(client, buf, ARRAY_SIZE(buf));

	if (ret < 0)

		sil164_err(client, "Error %d writing to subaddress 0x%x\n",

			   ret, addr);

}



static uint8_t

sil164_read(struct i2c_client *client, uint8_t addr)

{

	uint8_t val;

	int ret;



	ret = i2c_master_send(client, &addr, sizeof(addr));

	if (ret < 0)

		goto fail;



	ret = i2c_master_recv(client, &val, sizeof(val));

	if (ret < 0)

		goto fail;



	return val;



fail:

	sil164_err(client, "Error %d reading from subaddress 0x%x\n",

		   ret, addr);

	return 0;

}



static void

sil164_save_state(struct i2c_client *client, uint8_t *state)

{

	int i;



	for (i = 0x8; i <= 0xe; i++)

		state[i] = sil164_read(client, i);

}



static void

sil164_restore_state(struct i2c_client *client, uint8_t *state)

{

	int i;



	for (i = 0x8; i <= 0xe; i++)

		sil164_write(client, i, state[i]);

}



static void

sil164_set_power_state(struct i2c_client *client, bool on)

{

	uint8_t control0 = sil164_read(client, SIL164_CONTROL0);



	if (on)

		control0 |= SIL164_CONTROL0_POWER_ON;

	else

		control0 &= ~SIL164_CONTROL0_POWER_ON;



	sil164_write(client, SIL164_CONTROL0, control0);

}



static void

sil164_init_state(struct i2c_client *client,

		  struct sil164_encoder_params *config,

		  bool duallink)

{

	sil164_write(client, SIL164_CONTROL0,

		     SIL164_CONTROL0_HSYNC_ON |

		     SIL164_CONTROL0_VSYNC_ON |

		     (config->input_edge ? SIL164_CONTROL0_EDGE_RISING : 0) |

		     (config->input_width ? SIL164_CONTROL0_INPUT_24BIT : 0) |

		     (config->input_dual ? SIL164_CONTROL0_DUAL_EDGE : 0));



	sil164_write(client, SIL164_DETECT,

		     SIL164_DETECT_INTR_STAT |

		     SIL164_DETECT_OUT_MODE_RECEIVER);



	sil164_write(client, SIL164_CONTROL1,

		     (config->input_skew ? SIL164_CONTROL1_DESKEW_ENABLE : 0) |

		     (((config->input_skew + 4) & 0x7)

		      << SIL164_CONTROL1_DESKEW_INCR_SHIFT));



	sil164_write(client, SIL164_CONTROL2,

		     SIL164_CONTROL2_SYNC_CONT |

		     (config->pll_filter ? 0 : SIL164_CONTROL2_FILTER_ENABLE) |

		     (4 << SIL164_CONTROL2_FILTER_SETTING_SHIFT));



	sil164_write(client, SIL164_PLLZONE, 0);



	if (duallink)

		sil164_write(client, SIL164_DUALLINK,

			     SIL164_DUALLINK_ENABLE |

			     (((config->duallink_skew + 4) & 0x7)

			      << SIL164_DUALLINK_SKEW_SHIFT));

	else

		sil164_write(client, SIL164_DUALLINK, 0);

}



/* DRM encoder functions */



static void

sil164_encoder_set_config(struct drm_encoder *encoder, void *params)

{

	struct sil164_priv *priv = to_sil164_priv(encoder);



	priv->config = *(struct sil164_encoder_params *)params;

}



static void

sil164_encoder_dpms(struct drm_encoder *encoder, int mode)

{

	struct sil164_priv *priv = to_sil164_priv(encoder);

	bool on = (mode == DRM_MODE_DPMS_ON);

	bool duallink = (on && encoder->crtc->mode.clock > 165000);



	sil164_set_power_state(drm_i2c_encoder_get_client(encoder), on);



	if (priv->duallink_slave)

		sil164_set_power_state(priv->duallink_slave, duallink);

}



static void

sil164_encoder_save(struct drm_encoder *encoder)

{

	struct sil164_priv *priv = to_sil164_priv(encoder);



	sil164_save_state(drm_i2c_encoder_get_client(encoder),

			  priv->saved_state);



	if (priv->duallink_slave)

		sil164_save_state(priv->duallink_slave,

				  priv->saved_slave_state);

}



static void

sil164_encoder_restore(struct drm_encoder *encoder)

{

	struct sil164_priv *priv = to_sil164_priv(encoder);



	sil164_restore_state(drm_i2c_encoder_get_client(encoder),

			     priv->saved_state);



	if (priv->duallink_slave)

		sil164_restore_state(priv->duallink_slave,

				     priv->saved_slave_state);

}



static bool

sil164_encoder_mode_fixup(struct drm_encoder *encoder,

			  struct drm_display_mode *mode,

			  struct drm_display_mode *adjusted_mode)

{

	return true;

}



static int

sil164_encoder_mode_valid(struct drm_encoder *encoder,

			  struct drm_display_mode *mode)

{

	struct sil164_priv *priv = to_sil164_priv(encoder);



	if (mode->clock < 32000)

		return MODE_CLOCK_LOW;



	if (mode->clock > 330000 ||

	    (mode->clock > 165000 && !priv->duallink_slave))

		return MODE_CLOCK_HIGH;



	return MODE_OK;

}



static void

sil164_encoder_mode_set(struct drm_encoder *encoder,

			struct drm_display_mode *mode,

			struct drm_display_mode *adjusted_mode)

{

	struct sil164_priv *priv = to_sil164_priv(encoder);

	bool duallink = adjusted_mode->clock > 165000;



	sil164_init_state(drm_i2c_encoder_get_client(encoder),

			  &priv->config, duallink);



	if (priv->duallink_slave)

		sil164_init_state(priv->duallink_slave,

				  &priv->config, duallink);



	sil164_encoder_dpms(encoder, DRM_MODE_DPMS_ON);

}



static enum drm_connector_status

sil164_encoder_detect(struct drm_encoder *encoder,

		      struct drm_connector *connector)

{

	struct i2c_client *client = drm_i2c_encoder_get_client(encoder);



	if (sil164_read(client, SIL164_DETECT) & SIL164_DETECT_HOTPLUG_STAT)

		return connector_status_connected;

	else

		return connector_status_disconnected;

}



static int

sil164_encoder_get_modes(struct drm_encoder *encoder,

			 struct drm_connector *connector)

{

	return 0;

}



static int

sil164_encoder_create_resources(struct drm_encoder *encoder,

				struct drm_connector *connector)

{

	return 0;

}



static int

sil164_encoder_set_property(struct drm_encoder *encoder,

			    struct drm_connector *connector,

			    struct drm_property *property,

			    uint64_t val)

{

	return 0;

}



static void

sil164_encoder_destroy(struct drm_encoder *encoder)

{

	struct sil164_priv *priv = to_sil164_priv(encoder);



	if (priv->duallink_slave)

		i2c_unregister_device(priv->duallink_slave);



	kfree(priv);

	drm_i2c_encoder_destroy(encoder);

}



static struct drm_encoder_slave_funcs sil164_encoder_funcs = {

	.set_config = sil164_encoder_set_config,

	.destroy = sil164_encoder_destroy,

	.dpms = sil164_encoder_dpms,

	.save = sil164_encoder_save,

	.restore = sil164_encoder_restore,

	.mode_fixup = sil164_encoder_mode_fixup,

	.mode_valid = sil164_encoder_mode_valid,

	.mode_set = sil164_encoder_mode_set,

	.detect = sil164_encoder_detect,

	.get_modes = sil164_encoder_get_modes,

	.create_resources = sil164_encoder_create_resources,

	.set_property = sil164_encoder_set_property,

};



/* I2C driver functions */



static int

sil164_probe(struct i2c_client *client, const struct i2c_device_id *id)

{

	int vendor = sil164_read(client, SIL164_VENDOR_HI) << 8 |

		sil164_read(client, SIL164_VENDOR_LO);

	int device = sil164_read(client, SIL164_DEVICE_HI) << 8 |

		sil164_read(client, SIL164_DEVICE_LO);

	int rev = sil164_read(client, SIL164_REVISION);



	if (vendor != 0x1 || device != 0x6) {

		sil164_dbg(client, "Unknown device %x:%x.%x\n",

			   vendor, device, rev);

		return -ENODEV;

	}



	sil164_info(client, "Detected device %x:%x.%x\n",

		    vendor, device, rev);



	return 0;

}



static int

sil164_remove(struct i2c_client *client)

{

	return 0;

}



static struct i2c_client *

sil164_detect_slave(struct i2c_client *client)

{

	struct i2c_adapter *adap = client->adapter;

	struct i2c_msg msg = {

		.addr = SIL164_I2C_ADDR_SLAVE,

		.len = 0,

	};

	const struct i2c_board_info info = {

		I2C_BOARD_INFO("sil164", SIL164_I2C_ADDR_SLAVE)

	};



	if (i2c_transfer(adap, &msg, 1) != 1) {

		sil164_dbg(adap, "No dual-link slave found.");

		return NULL;

	}



	return i2c_new_device(adap, &info);

}



static int

sil164_encoder_init(struct i2c_client *client,

		    struct drm_device *dev,

		    struct drm_encoder_slave *encoder)

{

	struct sil164_priv *priv;



	priv = kzalloc(sizeof(*priv), GFP_KERNEL);

	if (!priv)

		return -ENOMEM;



	encoder->slave_priv = priv;

	encoder->slave_funcs = &sil164_encoder_funcs;



	priv->duallink_slave = sil164_detect_slave(client);



	return 0;

}



static struct i2c_device_id sil164_ids[] = {

	{ "sil164", 0 },

	{ }

};

MODULE_DEVICE_TABLE(i2c, sil164_ids);



static struct drm_i2c_encoder_driver sil164_driver = {

	.i2c_driver = {

		.probe = sil164_probe,

		.remove = sil164_remove,

		.driver = {

			.name = "sil164",

		},

		.id_table = sil164_ids,

	},

	.encoder_init = sil164_encoder_init,

};



/* Module initialization */



static int __init

sil164_init(void)

{

	return drm_i2c_encoder_register(THIS_MODULE, &sil164_driver);

}



static void __exit

sil164_exit(void)

{

	drm_i2c_encoder_unregister(&sil164_driver);

}



MODULE_AUTHOR("Francisco Jerez <currojerez@riseup.net>");

MODULE_DESCRIPTION("Silicon Image sil164 TMDS transmitter driver");

MODULE_LICENSE("GPL and additional rights");



module_init(sil164_init);

module_exit(sil164_exit);

drivers/gpu/drm/nouveau/Kconfig

+9 −0
Original line number Diff line number Diff line
@@ -41,4 +41,13 @@ config DRM_I2C_CH7006 


	  This driver is currently only useful if you're also using

	  the nouveau driver.



config DRM_I2C_SIL164

	tristate "Silicon Image sil164 TMDS transmitter"

	default m if DRM_NOUVEAU

	help

	  Support for sil164 and similar single-link (or dual-link

	  when used in pairs) TMDS transmitters, used in some nVidia

	  video cards.



endmenu

include/drm/i2c/sil164.h

0 → 100644
+63 −0
Original line number Diff line number Diff line 
/*

 * Copyright (C) 2010 Francisco Jerez.

 * All Rights Reserved.

 *

 * Permission is hereby granted, free of charge, to any person obtaining

 * a copy of this software and associated documentation files (the

 * "Software"), to deal in the Software without restriction, including

 * without limitation the rights to use, copy, modify, merge, publish,

 * distribute, sublicense, and/or sell copies of the Software, and to

 * permit persons to whom the Software is furnished to do so, subject to

 * the following conditions:

 *

 * The above copyright notice and this permission notice (including the

 * next paragraph) shall be included in all copies or substantial

 * portions of the Software.

 *

 * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,

 * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF

 * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.

 * IN NO EVENT SHALL THE COPYRIGHT OWNER(S) AND/OR ITS SUPPLIERS BE

 * LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION

 * OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION

 * WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.

 *

 */



#ifndef __DRM_I2C_SIL164_H__

#define __DRM_I2C_SIL164_H__



/**

 * struct sil164_encoder_params

 *

 * Describes how the sil164 is connected to the GPU. It should be used

 * as the @params parameter of its @set_config method.

 *

 * See "http://www.siliconimage.com/docs/SiI-DS-0021-E-164.pdf".

 */

struct sil164_encoder_params {

	enum {

		SIL164_INPUT_EDGE_FALLING = 0,

		SIL164_INPUT_EDGE_RISING

	} input_edge;



	enum {

		SIL164_INPUT_WIDTH_12BIT = 0,

		SIL164_INPUT_WIDTH_24BIT

	} input_width;



	enum {

		SIL164_INPUT_SINGLE_EDGE = 0,

		SIL164_INPUT_DUAL_EDGE

	} input_dual;



	enum {

		SIL164_PLL_FILTER_ON = 0,

		SIL164_PLL_FILTER_OFF,

	} pll_filter;



	int input_skew; /** < Allowed range [-4, 3], use 0 for no de-skew. */

	int duallink_skew; /** < Allowed range [-4, 3]. */

};



#endif