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

/*
 * Copyright © 2006-2007 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 "psb_intel_reg.h"
#include "psb_intel_display.h"
#include "framebuffer.h"
#include "mdfld_output.h"
#include "mdfld_dsi_output.h"

/* Hardcoded currently */
static int ksel = KSEL_CRYSTAL_19;

struct psb_intel_range_t {
	int min, max;
};

struct mrst_limit_t {
	struct psb_intel_range_t dot, m, p1;
};

struct mrst_clock_t {
	/* derived values */
	int dot;
	int m;
	int p1;
};

#define COUNT_MAX 0x10000000

void mdfldWaitForPipeDisable(struct drm_device *dev, int pipe)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	const struct psb_offset *map = &dev_priv->regmap[pipe];
	int count, temp;

	switch (pipe) {
	case 0:
	case 1:
	case 2:
		break;
	default:
		DRM_ERROR("Illegal Pipe Number.\n");
		return;
	}

	/* FIXME JLIU7_PO */
	psb_intel_wait_for_vblank(dev);
	return;

	/* Wait for for the pipe disable to take effect. */
	for (count = 0; count < COUNT_MAX; count++) {
		temp = REG_READ(map->conf);
		if ((temp & PIPEACONF_PIPE_STATE) == 0)
			break;
	}
}

void mdfldWaitForPipeEnable(struct drm_device *dev, int pipe)
{
	struct drm_psb_private *dev_priv = dev->dev_private;
	const struct psb_offset *map = &dev_priv->regmap[pipe];
	int count, temp;

	switch (pipe) {
	case 0:
	case 1:
	case 2:
		break;
	default:
		DRM_ERROR("Illegal Pipe Number.\n");
		return;
	}

	/* FIXME JLIU7_PO */
	psb_intel_wait_for_vblank(dev);
	return;

	/* Wait for for the pipe enable to take effect. */
	for (count = 0; count < COUNT_MAX; count++) {
		temp = REG_READ(map->conf);
		if ((temp & PIPEACONF_PIPE_STATE) == 1)
			break;
	}
}

static void psb_intel_crtc_prepare(struct drm_crtc *crtc)
{
	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_OFF);
}

static void psb_intel_crtc_commit(struct drm_crtc *crtc)
{
	struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
	crtc_funcs->dpms(crtc, DRM_MODE_DPMS_ON);
}

static bool psb_intel_crtc_mode_fixup(struct drm_crtc *crtc,
				  const struct drm_display_mode *mode,
				  struct drm_display_mode *adjusted_mode)
{
	return true;
}

/**
 * Return the pipe currently connected to the panel fitter,
 * or -1 if the panel fitter is not present or not in use
 */
static int psb_intel_panel_fitter_pipe(struct drm_device *dev)
{
	u32 pfit_control;

	pfit_control = REG_READ(PFIT_CONTROL);

	/* See if the panel fitter is in use */
	if ((pfit_control & PFIT_ENABLE) == 0)
		return -1;

	/* 965 can place panel fitter on either pipe */
	return (pfit_control >> 29) & 0x3;
}

static struct drm_device globle_dev;

void mdfld__intel_plane_set_alpha(int enable)
{
	struct drm_device *dev = &globle_dev;
	int dspcntr_reg = DSPACNTR;
	u32 dspcntr;

	dspcntr = REG_READ(dspcntr_reg);

	if (enable) {
		dspcntr &= ~DISPPLANE_32BPP_NO_ALPHA;
		dspcntr |= DISPPLANE_32BPP;
	} else {
		dspcntr &= ~DISPPLANE_32BPP;
		dspcntr |= DISPPLANE_32BPP_NO_ALPHA;
	}