From: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx> Renesas BSP kernel does this for Whitehawk board. It is not clear what it does, as the bits are marked reserved in the SoC documentation. Do not merge. Signed-off-by: Tomi Valkeinen <tomi.valkeinen+renesas@xxxxxxxxxxxxxxxx> --- drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c | 4 ++++ 1 file changed, 4 insertions(+) diff --git a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c index 723c35726c38..c264cb689664 100644 --- a/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c +++ b/drivers/gpu/drm/rcar-du/rcar_mipi_dsi.c @@ -598,6 +598,10 @@ static int rcar_mipi_dsi_startup(struct rcar_mipi_dsi *dsi, return -ENODEV; } + /* XXX HACK for Whitehawk board. "use_extal_clk" from BSP Kernel. */ + if (dsi->info->model == RCAR_DSI_R8A779G0) + rcar_mipi_dsi_set(dsi, CLOCKSET1, 0x0100000C); + /* PLL Clock Setting */ rcar_mipi_dsi_clr(dsi, CLOCKSET1, CLOCKSET1_SHADOW_CLEAR); rcar_mipi_dsi_set(dsi, CLOCKSET1, CLOCKSET1_SHADOW_CLEAR); -- 2.34.1
