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Commit 8adbbb2e authored by Yannick Fertre's avatar Yannick Fertre Committed by Benjamin Gaignard
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drm/stm: ltdc: rework reset sequence 



Reset must be properly assert before deassert.
This is important if there is an early boot splash screen
before the kernel start up.

Signed-off-by: default avatarYannick Fertre <yannick.fertre@st.com>
Reviewed-by: default avatarPhilippe Cornu <philippe.cornu@st.com>
Tested-by: default avatarPhilippe Cornu <philippe.cornu@st.com>
Signed-off-by: default avatarBenjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1530271355-5608-1-git-send-email-yannick.fertre@st.com
parent 7868e507

drivers/gpu/drm/stm/ltdc.c

+4 −1
Original line number Diff line number Diff line
@@ -1082,8 +1082,11 @@ int ltdc_load(struct drm_device *ddev) 
		}

	}



	if (!IS_ERR(rstc))

	if (!IS_ERR(rstc)) {

		reset_control_assert(rstc);

		usleep_range(10, 20);

		reset_control_deassert(rstc);

	}



	/* Disable interrupts */

	reg_clear(ldev->regs, LTDC_IER,