TCON DRQ set bits for non-burst DSI mode can computed via horizontal front porch instead of front porch + sync timings.
BSP code form BPI-M64-bsp is computing TCON DRQ set bits for non-burts as (in linux-sunxi/drivers/video/sunxi/disp2/disp/de/lowlevel_sun50iw1/de_dsi.c)
=> panel->lcd_ht - panel->lcd_x - panel->lcd_hbp => (timmings->hor_front_porch + panel->lcd_hbp + panel->lcd_x) - panel->lcd_x - panel->hbp => timmings->hor_front_porch => mode->hsync_start - mode->hdisplay
So, update the DRQ set bits accordingly.
Signed-off-by: Jagan Teki jagan@amarulasolutions.com Tested-by: Jagan Teki jagan@amarulasolutions.com --- Changes for v3: - Fixed proper commit message - add tested credit Changes for v2: - none
drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c | 4 ++-- 1 file changed, 2 insertions(+), 2 deletions(-)
diff --git a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c index 3a1d48bc1996..8d154cf2e6d6 100644 --- a/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c +++ b/drivers/gpu/drm/sun4i/sun6i_mipi_dsi.c @@ -367,9 +367,9 @@ static void sun6i_dsi_setup_burst(struct sun6i_dsi *dsi, struct mipi_dsi_device *device = dsi->device; u32 val = 0;
- if ((mode->hsync_end - mode->hdisplay) > 20) { + if ((mode->hsync_start - mode->hdisplay) > 20) { /* Maaaaaagic */ - u16 drq = (mode->hsync_end - mode->hdisplay) - 20; + u16 drq = (mode->hsync_start - mode->hdisplay) - 20;
drq *= mipi_dsi_pixel_format_to_bpp(device->format); drq /= 32;