According to revision 1.00 of R-Car Gen3 Soc manual, only DU channels of group 0 (DU0 and DU1) supports output control routing through register DORCR0. For channels of group 1 (DU2 and DU3) which are only present on H3/M3-W/M3-N SoCs, no routing options are available between super-imposition processors and the output pin controller. The updated version of the SoC manual prescribes thus to hardcode DPRCR2 bits that controls output pin routing for those channels. Signed-off-by: Jacopo Mondi <jacopo+renesas@xxxxxxxxxx> --- drivers/gpu/drm/rcar-du/rcar_du_group.c | 19 ++++++++++++++++--- 1 file changed, 16 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c index ef2c177..e79d424 100644 --- a/drivers/gpu/drm/rcar-du/rcar_du_group.c +++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c @@ -127,10 +127,19 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp) rcar_du_group_write(rgrp, DEFR10, DEFR10_CODE | DEFR10_DEFE10); /* - * Use DS1PR and DS2PR to configure planes priorities and connects the - * superposition 0 to DU0 pins. DU1 pins will be configured dynamically. + * For group 0 (DU0/DU1) use DS1PR and DS2PR to configure planes + * priorities and connects the superposition 0 to DU0 pins. + * DU1 pins will be configured dynamically. + * + * For group 1 (DU2/DU3), if any, use DS2PR and DS3PT to configure + * planes priorities and hardcode other bits. */ - rcar_du_group_write(rgrp, DORCR, DORCR_PG1D_DS1 | DORCR_DPRS); + if (rgrp->index == 0) + rcar_du_group_write(rgrp, DORCR, DORCR_PG1D_DS1 | DORCR_DPRS); + else + rcar_du_group_write(rgrp, DORCR, DORCR_PG2T | DORCR_DK2S | + DORCR_PG2D_DS2 | DORCR_DPRS); + /* Apply planes to CRTCs association. */ mutex_lock(&rgrp->lock); @@ -247,6 +256,10 @@ int rcar_du_group_set_routing(struct rcar_du_group *rgrp) struct rcar_du_crtc *crtc0 = &rgrp->dev->crtcs[rgrp->index * 2]; u32 dorcr = rcar_du_group_read(rgrp, DORCR); + /* Only group 0 (DU0/DU1) has pin routing options. */ + if (rgrp->index > 0) + return 0; + dorcr &= ~(DORCR_PG2T | DORCR_DK2S | DORCR_PG2D_MASK); /* -- 2.7.4
