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path: root/drivers/gpu/drm/rcar-du/rcar_du_group.c
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Diffstat (limited to 'drivers/gpu/drm/rcar-du/rcar_du_group.c')
-rw-r--r--drivers/gpu/drm/rcar-du/rcar_du_group.c38
1 files changed, 26 insertions, 12 deletions
diff --git a/drivers/gpu/drm/rcar-du/rcar_du_group.c b/drivers/gpu/drm/rcar-du/rcar_du_group.c
index 64738fca96d0..2f37ea901873 100644
--- a/drivers/gpu/drm/rcar-du/rcar_du_group.c
+++ b/drivers/gpu/drm/rcar-du/rcar_du_group.c
@@ -64,7 +64,8 @@ static void rcar_du_group_setup_defr8(struct rcar_du_group *rgrp)
if (rcdu->info->gen < 3) {
defr8 |= DEFR8_DEFE8;
- /* On Gen2 the DEFR8 register for the first group also controls
+ /*
+ * On Gen2 the DEFR8 register for the first group also controls
* RGB output routing to DPAD0 and VSPD1 routing to DU0/1/2 for
* DU instances that support it.
*/
@@ -75,7 +76,8 @@ static void rcar_du_group_setup_defr8(struct rcar_du_group *rgrp)
defr8 |= DEFR8_VSCS;
}
} else {
- /* On Gen3 VSPD routing can't be configured, but DPAD routing
+ /*
+ * On Gen3 VSPD routing can't be configured, but DPAD routing
* needs to be set despite having a single option available.
*/
u32 crtc = ffs(possible_crtcs) - 1;
@@ -124,7 +126,8 @@ static void rcar_du_group_setup(struct rcar_du_group *rgrp)
if (rcdu->info->gen >= 3)
rcar_du_group_write(rgrp, DEFR10, DEFR10_CODE | DEFR10_DEFE10);
- /* Use DS1PR and DS2PR to configure planes priorities and connects the
+ /*
+ * Use DS1PR and DS2PR to configure planes priorities and connects the
* superposition 0 to DU0 pins. DU1 pins will be configured dynamically.
*/
rcar_du_group_write(rgrp, DORCR, DORCR_PG1D_DS1 | DORCR_DPRS);
@@ -177,7 +180,8 @@ static void __rcar_du_group_start_stop(struct rcar_du_group *rgrp, bool start)
void rcar_du_group_start_stop(struct rcar_du_group *rgrp, bool start)
{
- /* Many of the configuration bits are only updated when the display
+ /*
+ * Many of the configuration bits are only updated when the display
* reset (DRES) bit in DSYSR is set to 1, disabling *both* CRTCs. Some
* of those bits could be pre-configured, but others (especially the
* bits related to plane assignment to display timing controllers) need
@@ -208,23 +212,32 @@ void rcar_du_group_restart(struct rcar_du_group *rgrp)
int rcar_du_set_dpad0_vsp1_routing(struct rcar_du_device *rcdu)
{
+ struct rcar_du_group *rgrp;
+ struct rcar_du_crtc *crtc;
+ unsigned int index;
int ret;
if (!rcar_du_has(rcdu, RCAR_DU_FEATURE_EXT_CTRL_REGS))
return 0;
- /* RGB output routing to DPAD0 and VSP1D routing to DU0/1/2 are
- * configured in the DEFR8 register of the first group. As this function
- * can be called with the DU0 and DU1 CRTCs disabled, we need to enable
- * the first group clock before accessing the register.
+ /*
+ * RGB output routing to DPAD0 and VSP1D routing to DU0/1/2 are
+ * configured in the DEFR8 register of the first group on Gen2 and the
+ * last group on Gen3. As this function can be called with the DU
+ * channels of the corresponding CRTCs disabled, we need to enable the
+ * group clock before accessing the register.
*/
- ret = clk_prepare_enable(rcdu->crtcs[0].clock);
+ index = rcdu->info->gen < 3 ? 0 : DIV_ROUND_UP(rcdu->num_crtcs, 2) - 1;
+ rgrp = &rcdu->groups[index];
+ crtc = &rcdu->crtcs[index * 2];
+
+ ret = clk_prepare_enable(crtc->clock);
if (ret < 0)
return ret;
- rcar_du_group_setup_defr8(&rcdu->groups[0]);
+ rcar_du_group_setup_defr8(rgrp);
- clk_disable_unprepare(rcdu->crtcs[0].clock);
+ clk_disable_unprepare(crtc->clock);
return 0;
}
@@ -236,7 +249,8 @@ int rcar_du_group_set_routing(struct rcar_du_group *rgrp)
dorcr &= ~(DORCR_PG2T | DORCR_DK2S | DORCR_PG2D_MASK);
- /* Set the DPAD1 pins sources. Select CRTC 0 if explicitly requested and
+ /*
+ * Set the DPAD1 pins sources. Select CRTC 0 if explicitly requested and
* CRTC 1 in all other cases to avoid cloning CRTC 0 to DPAD0 and DPAD1
* by default.
*/
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