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drm/rockchip: vop: invert dclk on rv1106 to modify signal quality

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Signed-off-by: Damon Ding <damon.ding@rock-chips.com>
Change-Id: I6d01aaaaead8ea3a45abec75f03dbab140c49da2
This commit is contained in:
Damon Ding
2022-04-08 14:56:20 +08:00
committed by Tao Huang
parent 36bede602e
commit 9eee000945
1 changed files with 3 additions and 0 deletions
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3
drivers/gpu/drm/rockchip/rockchip_drm_vop.c
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@@ -3268,6 +3268,9 @@ static void vop_crtc_atomic_enable(struct drm_crtc *crtc,
vop_mcu_mode(crtc);
dclk_inv = (s->bus_flags & DRM_BUS_FLAG_PIXDATA_DRIVE_NEGEDGE) ? 1 : 0;
/* For improving signal quality, dclk need to be inverted by default on rv1106. */
if ((VOP_MAJOR(vop->version) == 2 && VOP_MINOR(vop->version) == 12))
dclk_inv = !dclk_inv;
VOP_CTRL_SET(vop, dclk_pol, dclk_inv);
val = (adjusted_mode->flags & DRM_MODE_FLAG_NHSYNC) ?