disable FB

hc

2024-01-04 1543e317f1da31b75942316931e8f491a8920811

 kernel/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
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@@ -314,6 +314,23 @@
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 		rockchip_drm_unregister_sub_dev(sdev);
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 }
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+static enum drm_mode_status
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+rockchip_dp_drm_encoder_mode_valid(struct drm_encoder *encoder,
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+				   const struct drm_display_mode *mode)
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+{
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+	struct rockchip_dp_device *dp = to_dp(encoder);
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+	struct videomode vm;
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+
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+	drm_display_mode_to_videomode(mode, &vm);
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+
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+	if (!vm.hfront_porch || !vm.hback_porch || !vm.vfront_porch || !vm.vback_porch) {
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+		DRM_DEV_ERROR(dp->dev, "front porch or back porch can not be 0\n");
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+		return MODE_BAD;
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+	}
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+
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+	return MODE_OK;
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+}
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+
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 static bool
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 rockchip_dp_drm_encoder_mode_fixup(struct drm_encoder *encoder,
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 				   const struct drm_display_mode *mode,
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@@ -484,6 +501,7 @@
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 }
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 static struct drm_encoder_helper_funcs rockchip_dp_encoder_helper_funcs = {
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+	.mode_valid = rockchip_dp_drm_encoder_mode_valid,
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 	.mode_fixup = rockchip_dp_drm_encoder_mode_fixup,
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 	.mode_set = rockchip_dp_drm_encoder_mode_set,
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 	.atomic_enable = rockchip_dp_drm_encoder_enable,
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@@ -681,6 +699,7 @@
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 		dp->plat_data.right = secondary->adp;
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 		dp->plat_data.split_mode = true;
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+		secondary->plat_data.panel = dp->plat_data.panel;
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 		secondary->plat_data.left = dp->adp;
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 		secondary->plat_data.split_mode = true;
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 	}