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| author | Philippe CORNU <philippe.cornu@st.com> | 2018-04-23 16:10:51 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2018-05-18 11:22:06 +0200 |
| commit | 36830ce4eb2b5f6fe796c457b4043160c0e1e1fe (patch) | |
| tree | 76f63c188c5a640ecc3edaeeaac670a65da6b83c /drivers/gpu/drm | |
| parent | d9f9565c1f7f51904a5009671595a50b8ab0462b (diff) | |
| download | linux-36830ce4eb2b5f6fe796c457b4043160c0e1e1fe.tar.gz linux-36830ce4eb2b5f6fe796c457b4043160c0e1e1fe.tar.bz2 linux-36830ce4eb2b5f6fe796c457b4043160c0e1e1fe.zip | |
drm/panel: otm8009a: Fix glitches by moving backlight enable to otm8009a_enable()
The backlight 1st update was in the otm8009a_prepare() function for a
bad reason: backlight was not working in video mode and the
otm8009a_prepare() is in command mode for the init sequence. As the
backlight is now fixed (no low-power mode), it is good to put it back
in the otm8009a_enable() function, avoiding also image glitches visible
on some "slow" devices.
Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180423141054.13128-3-philippe.cornu@st.com
Diffstat (limited to 'drivers/gpu/drm')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 17 |
1 files changed, 10 insertions, 7 deletions
diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c index 0fd2e0144d2b..de4a16d5275c 100644 --- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c +++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c @@ -330,13 +330,6 @@ static int otm8009a_prepare(struct drm_panel *panel) ctx->prepared = true; - /* - * Power on the backlight. Note: end-user still controls brightness - * Note: ctx->prepared must be true before updating the backlight. - */ - ctx->bl_dev->props.power = FB_BLANK_UNBLANK; - backlight_update_status(ctx->bl_dev); - return 0; } @@ -344,6 +337,16 @@ static int otm8009a_enable(struct drm_panel *panel) { struct otm8009a *ctx = panel_to_otm8009a(panel); + if (ctx->enabled) + return 0; + + /* + * Power on the backlight. Note: end-user still controls brightness + * Note: ctx->prepared must be true before updating the backlight. + */ + ctx->bl_dev->props.power = FB_BLANK_UNBLANK; + backlight_update_status(ctx->bl_dev); + ctx->enabled = true; return 0; |