diff options
| -rw-r--r-- | drivers/video/omap2/dss/dpi.c | 27 |
1 files changed, 27 insertions, 0 deletions
diff --git a/drivers/video/omap2/dss/dpi.c b/drivers/video/omap2/dss/dpi.c index ca5f49c44ece..6baeb04e60cc 100644 --- a/drivers/video/omap2/dss/dpi.c +++ b/drivers/video/omap2/dss/dpi.c @@ -361,6 +361,28 @@ void omapdss_dpi_set_data_lines(struct omap_dss_device *dssdev, int data_lines) } EXPORT_SYMBOL(omapdss_dpi_set_data_lines); +static int __init dpi_verify_dsi_pll(struct platform_device *dsidev) +{ + int r; + + /* do initial setup with the PLL to see if it is operational */ + + r = dsi_runtime_get(dsidev); + if (r) + return r; + + r = dsi_pll_init(dsidev, 0, 1); + if (r) { + dsi_runtime_put(dsidev); + return r; + } + + dsi_pll_uninit(dsidev, true); + dsi_runtime_put(dsidev); + + return 0; +} + static int __init dpi_init_display(struct omap_dss_device *dssdev) { DSSDBG("init_display\n"); @@ -383,6 +405,11 @@ static int __init dpi_init_display(struct omap_dss_device *dssdev) enum omap_dss_clk_source dispc_fclk_src = dssdev->clocks.dispc.dispc_fclk_src; dpi.dsidev = dpi_get_dsidev(dispc_fclk_src); + + if (dpi_verify_dsi_pll(dpi.dsidev)) { + dpi.dsidev = NULL; + DSSWARN("DSI PLL not operational\n"); + } } return 0; |