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Commit 5dc5f618 authored by Florian Tobias Schandinat's avatar Florian Tobias Schandinat
Browse files

viafb: add initial EDID support 



This patch adds support for using EDID data on CRT and DVP1 for
initial configuration if viafb_mode or viafb_mode1 are not present.

Signed-off-by: default avatarFlorian Tobias Schandinat <FlorianSchandinat@gmx.de>
parent 2c4c8a8a

drivers/video/via/via_aux.c

+20 −0
Original line number Diff line number Diff line
@@ -60,9 +60,29 @@ void via_aux_free(struct via_aux_bus *bus) 
		return;



	list_for_each_entry_safe(pos, n, &bus->drivers, chain) {

		if (pos->cleanup)

			pos->cleanup(pos);



		list_del(&pos->chain);

		kfree(pos->data);

		kfree(pos);

	}



	kfree(bus);

}



const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus)

{

	struct via_aux_drv *pos;

	const struct fb_videomode *mode = NULL;



	if (!bus)

		return NULL;



	list_for_each_entry(pos, &bus->drivers, chain) {

		if (pos->get_preferred_mode)

			mode = pos->get_preferred_mode(pos);

	}



	return mode;

}

drivers/video/via/via_aux.h

+6 −0
Original line number Diff line number Diff line
@@ -27,6 +27,7 @@ 


#include <linux/list.h>

#include <linux/i2c.h>

#include <linux/fb.h>





struct via_aux_bus {
@@ -42,11 +43,16 @@ struct via_aux_drv { 


	const char *name;	/* human readable name of the driver */

	void *data;		/* private data of this driver */



	void (*cleanup)(struct via_aux_drv *drv);

	const struct fb_videomode* (*get_preferred_mode)

		(struct via_aux_drv *drv);

};





struct via_aux_bus *via_aux_probe(struct i2c_adapter *adap);

void via_aux_free(struct via_aux_bus *bus);

const struct fb_videomode *via_aux_get_preferred_mode(struct via_aux_bus *bus);





static inline bool via_aux_add(struct via_aux_drv *drv)

drivers/video/via/via_aux_edid.c

+58 −1
Original line number Diff line number Diff line
@@ -22,18 +22,75 @@ 
 */



#include <linux/slab.h>

#include <linux/fb.h>

#include "via_aux.h"

#include "../edid.h"





static const char *name = "EDID";





static void query_edid(struct via_aux_drv *drv)

{

	struct fb_monspecs *spec = drv->data;

	unsigned char edid[EDID_LENGTH];

	bool valid = false;



	if (spec)

		fb_destroy_modedb(spec->modedb);

	else

		spec = kmalloc(sizeof(*spec), GFP_KERNEL);



	spec->version = spec->revision = 0;

	if (via_aux_read(drv, 0x00, edid, EDID_LENGTH)) {

		fb_edid_to_monspecs(edid, spec);

		valid = spec->version || spec->revision;

	}



	if (!valid) {

		kfree(spec);

		spec = NULL;

	} else

		printk(KERN_DEBUG "EDID: %s %s\n", spec->manufacturer, spec->monitor);



	drv->data = spec;

}



static const struct fb_videomode *get_preferred_mode(struct via_aux_drv *drv)

{

	struct fb_monspecs *spec = drv->data;

	int i;



	if (!spec || !spec->modedb || !(spec->misc & FB_MISC_1ST_DETAIL))

		return NULL;



	for (i = 0; i < spec->modedb_len; i++) {

		if (spec->modedb[i].flag & FB_MODE_IS_FIRST &&

			spec->modedb[i].flag & FB_MODE_IS_DETAILED)

			return &spec->modedb[i];

	}



	return NULL;

}



static void cleanup(struct via_aux_drv *drv)

{

	struct fb_monspecs *spec = drv->data;



	if (spec)

		fb_destroy_modedb(spec->modedb);

}



void via_aux_edid_probe(struct via_aux_bus *bus)

{

	struct via_aux_drv drv = {

		.bus	=	bus,

		.addr	=	0x50,

		.name	=	name};

		.name	=	name,

		.cleanup	=	cleanup,

		.get_preferred_mode	=	get_preferred_mode};



	query_edid(&drv);



	/* as EDID devices can be connected/disconnected just add the driver */

	via_aux_add(&drv);

drivers/video/via/viafbdev.c

+19 −7
Original line number Diff line number Diff line
@@ -1671,12 +1671,23 @@ static void viafb_remove_proc(struct viafb_shared *shared) 
}

#undef IS_VT1636



static int parse_mode(const char *str, u32 *xres, u32 *yres)

static int parse_mode(const char *str, u32 devices, u32 *xres, u32 *yres)

{

	const struct fb_videomode *mode = NULL;

	char *ptr;



	if (!str) {

		if (machine_is_olpc()) {

		if (devices == VIA_CRT)

			mode = via_aux_get_preferred_mode(

				viaparinfo->shared->i2c_26);

		else if (devices == VIA_DVP1)

			mode = via_aux_get_preferred_mode(

				viaparinfo->shared->i2c_31);



		if (mode) {

			*xres = mode->xres;

			*yres = mode->yres;

		} else if (machine_is_olpc()) {

			*xres = 1200;

			*yres = 900;

		} else {
@@ -1829,10 +1840,11 @@ int __devinit via_fb_pci_probe(struct viafb_dev *vdev) 
			viafb_second_size * 1024 * 1024;

	}



	parse_mode(viafb_mode, &default_xres, &default_yres);

	parse_mode(viafb_mode, viaparinfo->shared->iga1_devices,

		&default_xres, &default_yres);

	if (viafb_SAMM_ON == 1)

		parse_mode(viafb_mode1, &viafb_second_xres,

			&viafb_second_yres);

		parse_mode(viafb_mode1, viaparinfo->shared->iga2_devices,

			&viafb_second_xres, &viafb_second_yres);



	default_var.xres = default_xres;

	default_var.yres = default_yres;
@@ -2060,9 +2072,9 @@ int __init viafb_init(void) 
	if (r < 0)

		return r;

#endif

	if (parse_mode(viafb_mode, &dummy_x, &dummy_y)

	if (parse_mode(viafb_mode, 0, &dummy_x, &dummy_y)

		|| !viafb_get_best_mode(dummy_x, dummy_y, viafb_refresh)

		|| parse_mode(viafb_mode1, &dummy_x, &dummy_y)

		|| parse_mode(viafb_mode1, 0, &dummy_x, &dummy_y)

		|| !viafb_get_best_mode(dummy_x, dummy_y, viafb_refresh1)

		|| viafb_bpp < 0 || viafb_bpp > 32

		|| viafb_bpp1 < 0 || viafb_bpp1 > 32