drm/stm: ltdc: reset controller to avoid partial refresh (f42f540b) · Commits · 戴 / test

Display controller reset must be done as soon as possible after enable the clock to avoid partial refresh on screen. Signed-off-by:

drivers/gpu/drm/stm/ltdc.c

+6 −5

Original line number	Diff line number	Diff line
		@@ -1137,6 +1137,12 @@ int ltdc_load(struct drm_device *ddev)
		return -ENODEV;
		}

		if (!IS_ERR(rstc)) {
		reset_control_assert(rstc);
		usleep_range(10, 20);
		reset_control_deassert(rstc);
		}

		res = platform_get_resource(pdev, IORESOURCE_MEM, 0);
		ldev->regs = devm_ioremap_resource(dev, res);
		if (IS_ERR(ldev->regs)) {
		@@ -1163,11 +1169,6 @@ int ltdc_load(struct drm_device *ddev)
		}
		}

		if (!IS_ERR(rstc)) {
		reset_control_assert(rstc);
		usleep_range(10, 20);
		reset_control_deassert(rstc);
		}

		ret = ltdc_get_caps(ddev);
		if (ret) {