diff options
Diffstat (limited to 'drivers')
| -rw-r--r-- | drivers/video/tegra/dc/dc.c | 27 |
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/video/tegra/dc/dc.c b/drivers/video/tegra/dc/dc.c index 11e62815f45a..7161d8bf1694 100644 --- a/drivers/video/tegra/dc/dc.c +++ b/drivers/video/tegra/dc/dc.c @@ -64,6 +64,20 @@ #endif static int no_vsync; +static struct fb_videomode tegra_dc_hdmi_fallback_mode = { + .refresh = 60, + .xres = 640, + .yres = 480, + .pixclock = KHZ2PICOS(25200), + .hsync_len = 96, /* h_sync_width */ + .vsync_len = 2, /* v_sync_width */ + .left_margin = 48, /* h_back_porch */ + .upper_margin = 33, /* v_back_porch */ + .right_margin = 16, /* h_front_porch */ + .lower_margin = 10, /* v_front_porch */ + .vmode = 0, + .sync = 0, +}; static void _tegra_dc_controller_disable(struct tegra_dc *dc); @@ -2622,10 +2636,19 @@ static bool _tegra_dc_controller_reset_enable(struct tegra_dc *dc) } #endif +static int _tegra_dc_set_default_videomode(struct tegra_dc *dc) +{ + return tegra_dc_set_fb_mode(dc, &tegra_dc_hdmi_fallback_mode, 0); +} + static bool _tegra_dc_enable(struct tegra_dc *dc) { - if (dc->mode.pclk == 0) - return false; + if (dc->mode.pclk == 0) { + /* DC enable called but no videomode is loaded. + Set fallback mode to enable driver with.*/ + if (_tegra_dc_set_default_videomode(dc)) + return false; + } if (!dc->out) return false; |