Messages in this thread Patch in this message | | | From | Yannick Fertre <> | Subject | [PATCH] drm/stm: ltdc: rework reset sequence | Date | Fri, 29 Jun 2018 13:22:35 +0200 |
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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: Yannick Fertre <yannick.fertre@st.com> --- drivers/gpu/drm/stm/ltdc.c | 5 ++++- 1 file changed, 4 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 96d20c2..8f4606d 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -1130,8 +1130,11 @@ 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, -- 1.9.1
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