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/*
* drivers/video/tegra/dc/ext/cursor.c
*
* Copyright (c) 2011-2012, NVIDIA CORPORATION, All rights reserved.
*
* Author: Robert Morell <rmorell@nvidia.com>
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that 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.
*/
#include <video/tegra_dc_ext.h>
#include "tegra_dc_ext_priv.h"
/* ugh */
#include "../dc_priv.h"
#include "../dc_reg.h"
int tegra_dc_ext_get_cursor(struct tegra_dc_ext_user *user)
{
struct tegra_dc_ext *ext = user->ext;
int ret = 0;
mutex_lock(&ext->cursor.lock);
if (!ext->cursor.user)
ext->cursor.user = user;
else if (ext->cursor.user != user)
ret = -EBUSY;
mutex_unlock(&ext->cursor.lock);
return ret;
}
int tegra_dc_ext_put_cursor(struct tegra_dc_ext_user *user)
{
struct tegra_dc_ext *ext = user->ext;
int ret = 0;
mutex_lock(&ext->cursor.lock);
if (ext->cursor.user == user)
ext->cursor.user = 0;
else
ret = -EACCES;
mutex_unlock(&ext->cursor.lock);
return ret;
}
static void set_cursor_image_hw(struct tegra_dc *dc,
struct tegra_dc_ext_cursor_image *args,
dma_addr_t phys_addr)
{
tegra_dc_writel(dc,
CURSOR_COLOR(args->foreground.r,
args->foreground.g,
args->foreground.b),
DC_DISP_CURSOR_FOREGROUND);
tegra_dc_writel(dc,
CURSOR_COLOR(args->background.r,
args->background.g,
args->background.b),
DC_DISP_CURSOR_BACKGROUND);
BUG_ON(phys_addr & ~CURSOR_START_ADDR_MASK);
tegra_dc_writel(dc,
CURSOR_START_ADDR(((unsigned long) phys_addr)) |
((args->flags & TEGRA_DC_EXT_CURSOR_IMAGE_FLAGS_SIZE_64x64) ?
CURSOR_SIZE_64 : 0),
DC_DISP_CURSOR_START_ADDR);
}
int tegra_dc_ext_set_cursor_image(struct tegra_dc_ext_user *user,
struct tegra_dc_ext_cursor_image *args)
{
struct tegra_dc_ext *ext = user->ext;
struct tegra_dc *dc = ext->dc;
struct nvmap_handle_ref *handle, *old_handle;
dma_addr_t phys_addr;
u32 size;
int ret;
if (!user->nvmap)
return -EFAULT;
size = args->flags & (TEGRA_DC_EXT_CURSOR_IMAGE_FLAGS_SIZE_32x32 |
TEGRA_DC_EXT_CURSOR_IMAGE_FLAGS_SIZE_64x64);
if (size != TEGRA_DC_EXT_CURSOR_IMAGE_FLAGS_SIZE_32x32 &&
size != TEGRA_DC_EXT_CURSOR_IMAGE_FLAGS_SIZE_64x64)
return -EINVAL;
mutex_lock(&ext->cursor.lock);
if (ext->cursor.user != user) {
ret = -EACCES;
goto unlock;
}
if (!ext->enabled) {
ret = -ENXIO;
goto unlock;
}
old_handle = ext->cursor.cur_handle;
ret = tegra_dc_ext_pin_window(user, args->buff_id, &handle, &phys_addr);
if (ret)
goto unlock;
ext->cursor.cur_handle = handle;
mutex_lock(&dc->lock);
set_cursor_image_hw(dc, args, phys_addr);
tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
/* XXX sync here? */
mutex_unlock(&dc->lock);
mutex_unlock(&ext->cursor.lock);
if (old_handle) {
nvmap_unpin(ext->nvmap, old_handle);
nvmap_free(ext->nvmap, old_handle);
}
return 0;
unlock:
mutex_unlock(&ext->cursor.lock);
return ret;
}
int tegra_dc_ext_set_cursor(struct tegra_dc_ext_user *user,
struct tegra_dc_ext_cursor *args)
{
struct tegra_dc_ext *ext = user->ext;
struct tegra_dc *dc = ext->dc;
u32 win_options;
bool enable;
int ret;
mutex_lock(&ext->cursor.lock);
if (ext->cursor.user != user) {
ret = -EACCES;
goto unlock;
}
if (!ext->enabled) {
ret = -ENXIO;
goto unlock;
}
enable = !!(args->flags & TEGRA_DC_EXT_CURSOR_FLAGS_VISIBLE);
mutex_lock(&dc->lock);
win_options = tegra_dc_readl(dc, DC_DISP_DISP_WIN_OPTIONS);
if (!!(win_options & CURSOR_ENABLE) != enable) {
win_options &= ~CURSOR_ENABLE;
if (enable)
win_options |= CURSOR_ENABLE;
tegra_dc_writel(dc, win_options, DC_DISP_DISP_WIN_OPTIONS);
}
tegra_dc_writel(dc, CURSOR_POSITION(args->x, args->y),
DC_DISP_CURSOR_POSITION);
tegra_dc_writel(dc, GENERAL_ACT_REQ << 8, DC_CMD_STATE_CONTROL);
tegra_dc_writel(dc, GENERAL_ACT_REQ, DC_CMD_STATE_CONTROL);
/* TODO: need to sync here? hopefully can avoid this, but need to
* figure out interaction w/ rest of GENERAL_ACT_REQ */
mutex_unlock(&dc->lock);
mutex_unlock(&ext->cursor.lock);
return 0;
unlock:
mutex_unlock(&ext->cursor.lock);
return ret;
}
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