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path: root/drivers/video/tegra/dc/dc.c
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Diffstat (limited to 'drivers/video/tegra/dc/dc.c')
-rw-r--r--drivers/video/tegra/dc/dc.c27
1 files changed, 25 insertions, 2 deletions
diff --git a/drivers/video/tegra/dc/dc.c b/drivers/video/tegra/dc/dc.c
index 11e6281..7161d8b 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;