diff options
| author | Yannick Fertré <yannick.fertre@st.com> | 2019-04-03 11:24:13 +0200 |
|---|---|---|
| committer | Benjamin Gaignard <benjamin.gaignard@linaro.org> | 2019-04-24 14:07:54 +0200 |
| commit | f42f540b9d0c16ffc0dd15a2d5c5f837bb7441c2 (patch) | |
| tree | 3dfb0968c16139f08b9e38c6d3f3a87d3ea45c1d /drivers/gpu/drm/stm | |
| parent | 77756ad6d08fb3f276d357be4c318f871dab8734 (diff) | |
drm/stm: ltdc: reset controller to avoid partial refresh
Display controller reset must be done as soon as possible after enable
the clock to avoid partial refresh on screen.
Signed-off-by: Yannick Fertré <yannick.fertre@st.com>
Acked-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1554283453-2879-1-git-send-email-yannick.fertre@st.com
Diffstat (limited to 'drivers/gpu/drm/stm')
| -rw-r--r-- | drivers/gpu/drm/stm/ltdc.c | 11 |
1 files changed, 6 insertions, 5 deletions
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c index 17438c28d9fc..21a821ee065a 100644 --- a/drivers/gpu/drm/stm/ltdc.c +++ b/drivers/gpu/drm/stm/ltdc.c @@ -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) { |