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drm/vc4: Initialize scaler DISPBKGND on modeset.

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We weren't updating the interlaced bit, so we'd scan out incorrectly
if the firmware had brought up the TV encoder and we were switching to
HDMI.

Signed-off-by: Eric Anholt <eric@anholt.net>
This commit is contained in:
Eric Anholt
2016-02-16 10:24:08 -08:00
parent a7c5047d1c
commit 6a60920986
2 changed files with 20 additions and 0 deletions
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6
drivers/gpu/drm/vc4/vc4_crtc.c
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@@ -183,6 +183,8 @@ static int vc4_get_clock_select(struct drm_crtc *crtc)
static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_crtc_state *state = crtc->state;
struct drm_display_mode *mode = &state->adjusted_mode;
@@ -251,6 +253,10 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
PV_CONTROL_FIFO_CLR |
PV_CONTROL_EN);
HVS_WRITE(SCALER_DISPBKGNDX(vc4_crtc->channel),
SCALER_DISPBKGND_AUTOHS |
(interlace ? SCALER_DISPBKGND_INTERLACE : 0));
if (debug_dump_regs) {
DRM_INFO("CRTC %d regs after:\n", drm_crtc_index(crtc));
vc4_crtc_dump_regs(vc4_crtc);