linux/drivers/gpu/drm/nouveau/dispnv04/dac.c

/*
 * Copyright 2003 NVIDIA, Corporation
 * Copyright 2006 Dave Airlie
 * Copyright 2007 Maarten Maathuis
 * Copyright 2007-2009 Stuart Bennett
 *
 * 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 AUTHORS OR COPYRIGHT HOLDERS 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 <drm/drm_modeset_helper_vtables.h>

#include "nouveau_drv.h"
#include "nouveau_encoder.h"
#include "nouveau_connector.h"
#include "nouveau_crtc.h"
#include "hw.h"
#include "nvreg.h"

#include <subdev/bios/gpio.h>
#include <subdev/gpio.h>

#include <nvif/timer.h>

int nv04_dac_output_offset(struct drm_encoder *encoder)
{ … }

/*
 * arbitrary limit to number of sense oscillations tolerated in one sample
 * period (observed to be at least 13 in "nvidia")
 */
#define MAX_HBLANK_OSC …

/*
 * arbitrary limit to number of conflicting sample pairs to tolerate at a
 * voltage step (observed to be at least 5 in "nvidia")
 */
#define MAX_SAMPLE_PAIRS …

static int sample_load_twice(struct drm_device *dev, bool sense[2])
{ … }

static enum drm_connector_status nv04_dac_detect(struct drm_encoder *encoder,
						 struct drm_connector *connector)
{ … }

uint32_t nv17_dac_sample_load(struct drm_encoder *encoder)
{ … }

static enum drm_connector_status
nv17_dac_detect(struct drm_encoder *encoder, struct drm_connector *connector)
{ … }

static bool nv04_dac_mode_fixup(struct drm_encoder *encoder,
				const struct drm_display_mode *mode,
				struct drm_display_mode *adjusted_mode)
{ … }

static void nv04_dac_prepare(struct drm_encoder *encoder)
{ … }

static void nv04_dac_mode_set(struct drm_encoder *encoder,
			      struct drm_display_mode *mode,
			      struct drm_display_mode *adjusted_mode)
{ … }

static void nv04_dac_commit(struct drm_encoder *encoder)
{ … }

void nv04_dac_update_dacclk(struct drm_encoder *encoder, bool enable)
{ … }

/* Check if the DAC corresponding to 'encoder' is being used by
 * someone else. */
bool nv04_dac_in_use(struct drm_encoder *encoder)
{ … }

static void nv04_dac_dpms(struct drm_encoder *encoder, int mode)
{ … }

static void nv04_dac_save(struct drm_encoder *encoder)
{ … }

static void nv04_dac_restore(struct drm_encoder *encoder)
{ … }

static void nv04_dac_destroy(struct drm_encoder *encoder)
{ … }

static const struct drm_encoder_helper_funcs nv04_dac_helper_funcs = …;

static const struct drm_encoder_helper_funcs nv17_dac_helper_funcs = …;

static const struct drm_encoder_funcs nv04_dac_funcs = …;

int
nv04_dac_create(struct drm_connector *connector, struct dcb_output *entry)
{ … }