mirror of https://github.com/hak5/openwrt-owl.git
59 lines
1.8 KiB
Diff
59 lines
1.8 KiB
Diff
From e79b86a0c5ccd0e8c16e31b2d494d43e997253d1 Mon Sep 17 00:00:00 2001
|
|
From: Eric Anholt <eric@anholt.net>
|
|
Date: Thu, 15 Sep 2016 15:25:23 +0100
|
|
Subject: [PATCH] drm/vc4: Set up SCALER_DISPCTRL at boot.
|
|
|
|
We want the HVS on, obviously, and we also want DSP3 (PV1's source) to
|
|
be muxed from HVS channel 2 like we expect in vc4_crtc.c. The
|
|
firmware wasn't setting the DSP3 mux up when both the LCD and HDMI
|
|
were disabled.
|
|
|
|
Signed-off-by: Eric Anholt <eric@anholt.net>
|
|
---
|
|
drivers/gpu/drm/vc4/vc4_hvs.c | 14 ++++++++++++++
|
|
drivers/gpu/drm/vc4/vc4_regs.h | 3 +++
|
|
2 files changed, 17 insertions(+)
|
|
|
|
--- 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 *d
|
|
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 *d
|
|
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;
|
|
}
|
|
|
|
--- a/drivers/gpu/drm/vc4/vc4_regs.h
|
|
+++ b/drivers/gpu/drm/vc4/vc4_regs.h
|
|
@@ -244,6 +244,9 @@
|
|
# define SCALER_DISPCTRL_ENABLE BIT(31)
|
|
# define SCALER_DISPCTRL_DSP2EISLUR BIT(15)
|
|
# define SCALER_DISPCTRL_DSP1EISLUR BIT(14)
|
|
+# define SCALER_DISPCTRL_DSP3_MUX_MASK VC4_MASK(19, 18)
|
|
+# define SCALER_DISPCTRL_DSP3_MUX_SHIFT 18
|
|
+
|
|
/* Enables Display 0 short line and underrun contribution to
|
|
* SCALER_DISPSTAT_IRQDISP0. Note that short frame contributions are
|
|
* always enabled.
|