path: root/drivers/gpu/drm/gma500/psb_intel_display.c

/*
 * Copyright © 2006-2011 Intel Corporation
 *
 * This program is free software; you can redistribute it and/or modify it
 * under the terms and conditions of the GNU General Public License,
 * version 2, as published by the Free Software Foundation.
 *
 * This program is distributed in the hope it will be useful, but WITHOUT
 * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or
 * FITNESS FOR A PARTICULAR PURPOSE.  See the GNU General Public License for
 * more details.
 *
 * You should have received a copy of the GNU General Public License along with
 * this program; if not, write to the Free Software Foundation, Inc.,
 * 51 Franklin St - Fifth Floor, Boston, MA 02110-1301 USA.
 *
 * Authors:
 *	Eric Anholt <eric@anholt.net>
 */

#include <linux/i2c.h>
#include <linux/pm_runtime.h>

#include <drm/drmP.h>
#include "framebuffer.h"
#include "psb_drv.h"
#include "psb_intel_drv.h"
#include "psb_intel_reg.h"
#include "psb_intel_display.h"
#include "power.h"

struct psb_intel_clock_t {
	/* given values */
	int n;
	int m1, m2;
	int p1, p2;
	/* derived values */
	int dot;
	int vco;
	int m;
	int p;
};

struct psb_intel_range_t {
	int min, max;
};

struct psb_intel_p2_t {
	int dot_limit;
	int p2_slow, p2_fast;
};

#define INTEL_P2_NUM		      2

struct psb_intel_limit_t {
	struct psb_intel_range_t dot, vco, n, m, m1, m2, p, p1;
	struct psb_intel_p2_t p2;
};

#define I8XX_DOT_MIN		  25000
#define I8XX_DOT_MAX		 350000
#define I8XX_VCO_MIN		 930000
#define I8XX_VCO_MAX		1400000
#define I8XX_N_MIN		      3
#define I8XX_N_MAX		     16
#define I8XX_M_MIN		     96
#define I8XX_M_MAX		    140
#define I8XX_M1_MIN		     18
#define I8XX_M1_MAX		     26
#define I8XX_M2_MIN		      6
#define I8XX_M2_MAX		     16
#define I8XX_P_MIN		      4
#define I8XX_P_MAX		    128
#define I8XX_P1_MIN		      2
#define I8XX_P1_MAX		     33
#define I8XX_P1_LVDS_MIN	      1
#define I8XX_P1_LVDS_MAX	      6
#define I8XX_P2_SLOW		      4
#define I8XX_P2_FAST		      2
#define I8XX_P2_LVDS_SLOW	      14
#define I8XX_P2_LVDS_FAST	      14	/* No fast option */
#define I8XX_P2_SLOW_LIMIT	 165000

#define I9XX_DOT_MIN		  20000
#define I9XX_DOT_MAX		 400000
#define I9XX_VCO_MIN		1400000
#define I9XX_VCO_MAX		2800000
#define I9XX_N_MIN		      3
#define I9XX_N_MAX		      8
#define I9XX_M_MIN		     70
#define I9XX_M_MAX		    120
#define I9XX_M1_MIN		     10
#define I9XX_M1_MAX		     20
#define I9XX_M2_MIN		      5
#define I9XX_M2_MAX		      9
#define I9XX_P_SDVO_DAC_MIN	      5
#define I9XX_P_SDVO_DAC_MAX	     80
#define I9XX_P_LVDS_MIN		      7
#define I9XX_P_LVDS_MAX		     98
#define I9XX_P1_MIN		      1
#define I9XX_P1_MAX		      8
#define I9XX_P2_SDVO_DAC_SLOW		     10
#define I9XX_P2_SDVO_DAC_FAST		      5
#define I9XX_P2_SDVO_DAC_SLOW_LIMIT	 200000
#define I9XX_P2_LVDS_SLOW		     14
#define I9XX_P2_LVDS_FAST		      7
#define I9XX_P2_LVDS_SLOW_LIMIT		 112000

#define INTEL_LIMIT_I8XX_DVO_DAC    0
#define INTEL_LIMIT_I8XX_LVDS	    1
#define INTEL_LIMIT_I9XX_SDVO_DAC   2
#define INTEL_LIMIT_I9XX_LVDS	    3

static const struct psb_intel_limit_t psb_intel_limits[] = {
	{			/* INTEL_LIMIT_I8XX_DVO_DAC */
	 .dot = {.min = I8XX_DOT_MIN, .max = I8XX_DOT_MAX},
	 .vco = {.min = I8XX_VCO_MIN, .max = I8XX_VCO_MAX},
	 .n = {.min = I8XX_N_MIN, .max = I8XX_N_MAX},
	 .m = {.min = I8XX_M_MIN, .max = I8XX_M_MAX},
	 .m1 = {.min = I8XX_M1_MIN, .max = I8XX_M1_MAX},
	 .m2 = {.min = I8XX_M2_MIN, .max = I8XX_M2_MAX},
	 .p = {.min = I8XX_P_MIN, .max = I8XX_P_MAX},
	 .p1 = {.min = I8XX_P1_MIN, .max = I8XX_P1_MAX},
	 .p2 = {.dot_limit = I8XX_P2_SLOW_LIMIT,
		.p2_slow = I8XX_P2_SLOW, .p2_fast = I8XX_P2_FAST},
	 },
	{			/* INTEL_LIMIT_I8XX_LVDS */
	 .dot = {.min = I8XX_DOT_MIN, .max = I8XX_DOT_MAX},
	 .vco = {.min = I8XX_VCO_MIN, .max = I8XX_VCO_MAX},
	 .n = {.min = I8XX_N_MIN, .max = I8XX_N_MAX},
	 .m = {.min = I8XX_M_MIN, .max = I8XX_M_MAX},
	 .m1 = {.min = I8XX_M1_MIN, .max = I8XX_M1_M