diff options
Diffstat (limited to 'drivers/video/mcde/mcde_display.c')
| -rw-r--r-- | drivers/video/mcde/mcde_display.c | 23 |
1 files changed, 22 insertions, 1 deletions
diff --git a/drivers/video/mcde/mcde_display.c b/drivers/video/mcde/mcde_display.c index 28409166c7d..a461b36c9b6 100644 --- a/drivers/video/mcde/mcde_display.c +++ b/drivers/video/mcde/mcde_display.c @@ -122,7 +122,28 @@ static inline int mcde_display_try_video_mode_default( struct mcde_display_device *ddev, struct mcde_video_mode *video_mode) { - /* TODO Check if inside native_xres and native_yres */ + /* + * DSI video mode: + * This function is intended for configuring supported video mode(s). + * Overload it into the panel driver file and set up blanking + * intervals and pixel clock according to below recommendations. + * + * vertical blanking parameters vbp, vfp, vsw are given in lines + * horizontal blanking parameters hbp, hfp, hsw are given in pixels + * + * video_mode->pixclock is the time between two pixels (in picoseconds) + * The source of the pixel clock is DSI PLL and it shall be set to + * meet the requirement + * + * non-burst mode: + * pixel clock (Hz) = (VACT+VBP+VFP+VSA) * (HACT+HBP+HFP+HSA) * + * framerate * bpp / num_data_lanes + * + * burst mode: + * pixel clock (Hz) > (VACT+VBP+VFP+VSA) * (HACT+HBP+HFP+HSA) * + * framerate * bpp / num_data_lanes * 1.1 + * (1.1 is a 10% margin needed for burst mode calculations) + */ return 0; } |