diff options
| author | Philippe CORNU <philippe.cornu@st.com> | 2018-04-23 16:10:50 +0200 |
|---|---|---|
| committer | Thierry Reding <treding@nvidia.com> | 2018-05-18 11:22:06 +0200 |
| commit | d9f9565c1f7f51904a5009671595a50b8ab0462b (patch) | |
| tree | 216a54d1513a7029878b5e93e02a11dbec4a5d84 /drivers/gpu/drm/panel | |
| parent | 0c08754b59da5557532d946599854e6df28edc22 (diff) | |
drm/panel: otm8009a: Fix backlight updates
Backlight updates was not working anymore since the good implementation
of the DSI low-power mode in the DSI host driver. After a longer
analysis, the backlight updates in DSI video mode require the DSI high-
speed mode.
Note: it is important to keep the DSI low-power mode for the rest of the
driver as init sequence, sleep in/out... DSI commands work in low-power
mode.
Signed-off-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Thierry Reding <treding@nvidia.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20180423141054.13128-2-philippe.cornu@st.com
Diffstat (limited to 'drivers/gpu/drm/panel')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-orisetech-otm8009a.c | 18 |
1 files changed, 16 insertions, 2 deletions
diff --git a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c index 90f1ae4af93c..0fd2e0144d2b 100644 --- a/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c +++ b/drivers/gpu/drm/panel/panel-orisetech-otm8009a.c @@ -98,6 +98,20 @@ static void otm8009a_dcs_write_buf(struct otm8009a *ctx, const void *data, DRM_WARN("mipi dsi dcs write buffer failed\n"); } +static void otm8009a_dcs_write_buf_hs(struct otm8009a *ctx, const void *data, + size_t len) +{ + struct mipi_dsi_device *dsi = to_mipi_dsi_device(ctx->dev); + + /* data will be sent in dsi hs mode (ie. no lpm) */ + dsi->mode_flags &= ~MIPI_DSI_MODE_LPM; + + otm8009a_dcs_write_buf(ctx, data, len); + + /* restore back the dsi lpm mode */ + dsi->mode_flags |= MIPI_DSI_MODE_LPM; +} + #define dcs_write_seq(ctx, seq...) \ ({ \ static const u8 d[] = { seq }; \ @@ -387,7 +401,7 @@ static int otm8009a_backlight_update_status(struct backlight_device *bd) */ data[0] = MIPI_DCS_SET_DISPLAY_BRIGHTNESS; data[1] = bd->props.brightness; - otm8009a_dcs_write_buf(ctx, data, ARRAY_SIZE(data)); + otm8009a_dcs_write_buf_hs(ctx, data, ARRAY_SIZE(data)); /* set Brightness Control & Backlight on */ data[1] = 0x24; @@ -399,7 +413,7 @@ static int otm8009a_backlight_update_status(struct backlight_device *bd) /* Update Brightness Control & Backlight */ data[0] = MIPI_DCS_WRITE_CONTROL_DISPLAY; - otm8009a_dcs_write_buf(ctx, data, ARRAY_SIZE(data)); + otm8009a_dcs_write_buf_hs(ctx, data, ARRAY_SIZE(data)); return 0; } |