diff options
Diffstat (limited to 'drivers/video/tegra/dc/lut.c')
| -rw-r--r-- | drivers/video/tegra/dc/lut.c | 130 |
1 files changed, 130 insertions, 0 deletions
diff --git a/drivers/video/tegra/dc/lut.c b/drivers/video/tegra/dc/lut.c new file mode 100644 index 000000000000..7ce8fc6768a0 --- /dev/null +++ b/drivers/video/tegra/dc/lut.c @@ -0,0 +1,130 @@ +/* + * drivers/video/tegra/dc/lut.c + * + * Copyright (c) 2010-2012, NVIDIA CORPORATION, All rights reserved. + * + * This software is licensed under the terms of the GNU General Public + * License version 2, as published by the Free Software Foundation, and + * may be copied, distributed, and modified under those terms. + * + * 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 <linux/err.h> +#include <linux/types.h> +#include <mach/dc.h> + +#include "dc_reg.h" +#include "dc_priv.h" + +void tegra_dc_init_lut_defaults(struct tegra_dc_lut *lut) +{ + int i; + for (i = 0; i < 256; i++) + lut->r[i] = lut->g[i] = lut->b[i] = (u8)i; +} + +static int tegra_dc_loop_lut(struct tegra_dc *dc, + struct tegra_dc_win *win, + int(*lambda)(struct tegra_dc *dc, int i, u32 rgb)) +{ + struct tegra_dc_lut *lut = &win->lut; + struct tegra_dc_lut *global_lut = &dc->fb_lut; + int i; + for (i = 0; i < 256; i++) { + + u32 r = (u32)lut->r[i]; + u32 g = (u32)lut->g[i]; + u32 b = (u32)lut->b[i]; + + if (!(win->ppflags & TEGRA_WIN_PPFLAG_CP_FBOVERRIDE)) { + r = (u32)global_lut->r[r]; + g = (u32)global_lut->g[g]; + b = (u32)global_lut->b[b]; + } + + if (!lambda(dc, i, r | (g<<8) | (b<<16))) + return 0; + } + return 1; +} + +static int tegra_dc_lut_isdefaults_lambda(struct tegra_dc *dc, int i, u32 rgb) +{ + if (rgb != (i | (i<<8) | (i<<16))) + return 0; + return 1; +} + +static int tegra_dc_set_lut_setreg_lambda(struct tegra_dc *dc, int i, u32 rgb) +{ + tegra_dc_writel(dc, rgb, DC_WIN_COLOR_PALETTE(i)); + return 1; +} + +void tegra_dc_set_lut(struct tegra_dc *dc, struct tegra_dc_win *win) +{ + unsigned long val = tegra_dc_readl(dc, DC_WIN_WIN_OPTIONS); + + tegra_dc_loop_lut(dc, win, tegra_dc_set_lut_setreg_lambda); + + if (win->ppflags & TEGRA_WIN_PPFLAG_CP_ENABLE) + val |= CP_ENABLE; + else + val &= ~CP_ENABLE; + + tegra_dc_writel(dc, val, DC_WIN_WIN_OPTIONS); +} + +static int tegra_dc_update_winlut(struct tegra_dc *dc, int win_idx, int fbovr) +{ + struct tegra_dc_win *win = &dc->windows[win_idx]; + + mutex_lock(&dc->lock); + + if (!dc->enabled) { + mutex_unlock(&dc->lock); + return -EFAULT; + } + + if (fbovr > 0) + win->ppflags |= TEGRA_WIN_PPFLAG_CP_FBOVERRIDE; + else if (fbovr == 0) + win->ppflags &= ~TEGRA_WIN_PPFLAG_CP_FBOVERRIDE; + + if (!tegra_dc_loop_lut(dc, win, tegra_dc_lut_isdefaults_lambda)) + win->ppflags |= TEGRA_WIN_PPFLAG_CP_ENABLE; + else + win->ppflags &= ~TEGRA_WIN_PPFLAG_CP_ENABLE; + + tegra_dc_writel(dc, WINDOW_A_SELECT << win_idx, + DC_CMD_DISPLAY_WINDOW_HEADER); + + tegra_dc_set_lut(dc, win); + + mutex_unlock(&dc->lock); + + tegra_dc_update_windows(&win, 1); + + return 0; +} + +int tegra_dc_update_lut(struct tegra_dc *dc, int win_idx, int fboveride) +{ + if (win_idx > -1) + return tegra_dc_update_winlut(dc, win_idx, fboveride); + + for (win_idx = 0; win_idx < DC_N_WINDOWS; win_idx++) { + int err = tegra_dc_update_winlut(dc, win_idx, fboveride); + if (err) + return err; + } + + return 0; +} +EXPORT_SYMBOL(tegra_dc_update_lut); + |