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| author | Yannick Fertre <yannick.fertre@st.com> | 2018-06-29 13:22:35 +0200 |
|---|---|---|
| committer | Benjamin Gaignard <benjamin.gaignard@linaro.org> | 2018-07-06 10:15:47 +0200 |
| commit | 8adbbb2e7871e76d53ea91e6159864ee534fdac8 (patch) | |
| tree | 77c696d7e6b67dccd891e5f56e6dc998118995e0 /drivers/gpu/drm/stm | |
| parent | drm/stm: ltdc: filter mode pixel clock vs pad constraint (diff) | |
| download | linux-8adbbb2e7871e76d53ea91e6159864ee534fdac8.tar.xz linux-8adbbb2e7871e76d53ea91e6159864ee534fdac8.zip | |
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: Yannick Fertre <yannick.fertre@st.com>
Reviewed-by: Philippe Cornu <philippe.cornu@st.com>
Tested-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1530271355-5608-1-git-send-email-yannick.fertre@st.com
Diffstat (limited to 'drivers/gpu/drm/stm')
| -rw-r--r-- | drivers/gpu/drm/stm/ltdc.c | 5 |
1 files changed, 4 insertions, 1 deletions
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index f1f37336a57a..808d9fb627e9 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -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, |