diff options
| author | David Schalig <dschalig@nvidia.com> | 2011-10-06 20:24:07 +0900 |
|---|---|---|
| committer | Dan Willemsen <dwillemsen@nvidia.com> | 2011-11-30 21:49:14 -0800 |
| commit | 80225d4761a7afb4ad16cc2a15e5c5ac16283d30 (patch) | |
| tree | 2153cc57461ceb3eb0cbab664c67f2b3c3b533c4 /drivers/video/tegra/dc/dc.c | |
| parent | f8b65fb54494b360a3263cc4176a7f1f47277c45 (diff) | |
video: tegra: dc: add ioctl for setting gamma lut
Adds ioctl TEGRA_DC_EXT_SET_LUT to dc_ext driver for setting
a DC window's color palette.
Bug 868060
Change-Id: I57ffcf3a3f91e76efd1c7f1f972b73c2edbaed82
Reviewed-on: http://git-master/r/56392
Reviewed-by: Rohan Somvanshi <rsomvanshi@nvidia.com>
Tested-by: Rohan Somvanshi <rsomvanshi@nvidia.com>
Rebase-Id: R712c71151d0c3e3d274279f334bedf312e26e75d
Diffstat (limited to 'drivers/video/tegra/dc/dc.c')
| -rw-r--r-- | drivers/video/tegra/dc/dc.c | 46 |
1 files changed, 45 insertions, 1 deletions
diff --git a/drivers/video/tegra/dc/dc.c b/drivers/video/tegra/dc/dc.c index f40e8cac44b9..2c85a488bbe6 100644 --- a/drivers/video/tegra/dc/dc.c +++ b/drivers/video/tegra/dc/dc.c @@ -665,6 +665,48 @@ int tegra_dc_update_csc(struct tegra_dc *dc, int win_idx) } EXPORT_SYMBOL(tegra_dc_update_csc); +static 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 void tegra_dc_set_lut(struct tegra_dc *dc, + struct tegra_dc_lut *lut, + int start, + int len) +{ + int i; + for (i = start, len += start; i < len; i++) { + u32 rgb = ((u32)lut->r[i]) | + ((u32)lut->g[i]<<8) | + ((u32)lut->b[i]<<16); + tegra_dc_writel(dc, rgb, DC_WIN_COLOR_PALETTE(i)); + } +} + +int tegra_dc_update_lut(struct tegra_dc *dc, int win_idx, int start, int len) +{ + mutex_lock(&dc->lock); + + if (!dc->enabled) { + mutex_unlock(&dc->lock); + return -EFAULT; + } + + tegra_dc_writel(dc, WINDOW_A_SELECT << win_idx, + DC_CMD_DISPLAY_WINDOW_HEADER); + + tegra_dc_set_lut(dc, &dc->windows[win_idx].lut, start, len); + + mutex_unlock(&dc->lock); + + return 0; +} +EXPORT_SYMBOL(tegra_dc_update_lut); + static void tegra_dc_set_scaling_filter(struct tegra_dc *dc) { unsigned i; @@ -1075,7 +1117,7 @@ int tegra_dc_update_windows(struct tegra_dc_win *windows[], int n) DC_WIN_BUFFER_ADDR_MODE_LINEAR_UV, DC_WIN_BUFFER_ADDR_MODE); - val = WIN_ENABLE; + val = WIN_ENABLE | CP_ENABLE; if (yuvp) val |= CSC_ENABLE; else if (tegra_dc_fmt_bpp(win->fmt) < 24) @@ -2185,6 +2227,8 @@ static void tegra_dc_init(struct tegra_dc *dc) DC_CMD_DISPLAY_WINDOW_HEADER); tegra_dc_init_csc_defaults(&dc->windows[i].csc); tegra_dc_set_csc(dc, &dc->windows[i].csc); + tegra_dc_init_lut_defaults(&dc->windows[i].lut); + tegra_dc_set_lut(dc, &dc->windows[i].lut, 0, 256); tegra_dc_set_scaling_filter(dc); } |