diff options
Diffstat (limited to 'drivers/video/tegra/dc')
| -rw-r--r-- | drivers/video/tegra/dc/dc.c | 17 | ||||
| -rw-r--r-- | drivers/video/tegra/dc/dc_reg.h | 2 |
2 files changed, 19 insertions, 0 deletions
diff --git a/drivers/video/tegra/dc/dc.c b/drivers/video/tegra/dc/dc.c index fb171549f78d..935f18bc8cfd 100644 --- a/drivers/video/tegra/dc/dc.c +++ b/drivers/video/tegra/dc/dc.c @@ -583,6 +583,23 @@ static unsigned int tegra_dc_has_multiple_dc(void) return (cnt > 1); } +/* get the stride size of a window. + * return: stride size in bytes for window win. or 0 if unavailble. */ +int tegra_dc_get_stride(struct tegra_dc *dc, unsigned win) +{ + u32 tmp; + u32 stride; + + if (!dc->enabled) + return 0; + BUG_ON(win > DC_N_WINDOWS); + tegra_dc_writel(dc, WINDOW_A_SELECT << win, + DC_CMD_DISPLAY_WINDOW_HEADER); + tmp = tegra_dc_readl(dc, DC_WIN_LINE_STRIDE); + return GET_LINE_STRIDE(tmp); +} +EXPORT_SYMBOL(tegra_dc_get_stride); + struct tegra_dc *tegra_dc_get_dc(unsigned idx) { if (idx < TEGRA_MAX_DC) diff --git a/drivers/video/tegra/dc/dc_reg.h b/drivers/video/tegra/dc/dc_reg.h index 8b84bff45eb3..5eac27adfbf8 100644 --- a/drivers/video/tegra/dc/dc_reg.h +++ b/drivers/video/tegra/dc/dc_reg.h @@ -430,6 +430,8 @@ #define DC_WIN_LINE_STRIDE 0x70a #define LINE_STRIDE(x) (x) #define UV_LINE_STRIDE(x) (((x) & 0xffff) << 16) +#define GET_LINE_STRIDE(x) ((x) & 0xffff) +#define GET_UV_LINE_STRIDE(x) (((x) >> 16) & 0xffff) #define DC_WIN_BUF_STRIDE 0x70b #define DC_WIN_UV_BUF_STRIDE 0x70c #define DC_WIN_BUFFER_ADDR_MODE 0x70d |