diff options
Diffstat (limited to 'drivers/gpu/drm/vc4/vc4_hvs.c')
| -rw-r--r-- | drivers/gpu/drm/vc4/vc4_hvs.c | 14 |
1 files changed, 14 insertions, 0 deletions
diff --git a/drivers/gpu/drm/vc4/vc4_hvs.c b/drivers/gpu/drm/vc4/vc4_hvs.c index 6fbab1c82cb1..fc68b1b4da52 100644 --- a/drivers/gpu/drm/vc4/vc4_hvs.c +++ b/drivers/gpu/drm/vc4/vc4_hvs.c @@ -170,6 +170,7 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) struct vc4_dev *vc4 = drm->dev_private; struct vc4_hvs *hvs = NULL; int ret; + u32 dispctrl; hvs = devm_kzalloc(&pdev->dev, sizeof(*hvs), GFP_KERNEL); if (!hvs) @@ -211,6 +212,19 @@ static int vc4_hvs_bind(struct device *dev, struct device *master, void *data) return ret; vc4->hvs = hvs; + + dispctrl = HVS_READ(SCALER_DISPCTRL); + + dispctrl |= SCALER_DISPCTRL_ENABLE; + + /* Set DSP3 (PV1) to use HVS channel 2, which would otherwise + * be unused. + */ + dispctrl &= ~SCALER_DISPCTRL_DSP3_MUX_MASK; + dispctrl |= VC4_SET_FIELD(2, SCALER_DISPCTRL_DSP3_MUX); + + HVS_WRITE(SCALER_DISPCTRL, dispctrl); + return 0; } |