Re: [PATCH 3/8] drm/panel: boe-tv101wum-nl6: Check for errors on the NOP in prepare()
Il 17/05/24 23:36, Douglas Anderson ha scritto:
The mipi_dsi_dcs_nop() function returns an error but we weren't
checking it in boe_panel_prepare(). Add a check. This is highly
unlikely to matter in practice. If the NOP failed then likely later
MIPI commands would fail too.
Found by code inspection.
Fixes: 812562b8d881 ("drm/panel: boe-tv101wum-nl6: Fine tune the panel power
sequence")
Signed-off-by: Douglas Anderson
Reviewed-by: AngeloGioacchino Del Regno
Re: [PATCH 3/8] drm/panel: boe-tv101wum-nl6: Check for errors on the NOP in prepare()
On Fri, May 17, 2024 at 02:36:38PM -0700, Douglas Anderson wrote:
> The mipi_dsi_dcs_nop() function returns an error but we weren't
> checking it in boe_panel_prepare(). Add a check. This is highly
> unlikely to matter in practice. If the NOP failed then likely later
> MIPI commands would fail too.
>
> Found by code inspection.
>
> Fixes: 812562b8d881 ("drm/panel: boe-tv101wum-nl6: Fine tune the panel power
> sequence")
> Signed-off-by: Douglas Anderson
> ---
>
Reviewed-by: Dmitry Baryshkov
--
With best wishes
Dmitry
[PATCH 3/8] drm/panel: boe-tv101wum-nl6: Check for errors on the NOP in prepare()
The mipi_dsi_dcs_nop() function returns an error but we weren't
checking it in boe_panel_prepare(). Add a check. This is highly
unlikely to matter in practice. If the NOP failed then likely later
MIPI commands would fail too.
Found by code inspection.
Fixes: 812562b8d881 ("drm/panel: boe-tv101wum-nl6: Fine tune the panel power
sequence")
Signed-off-by: Douglas Anderson
---
drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 6 +-
1 file changed, 5 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
index 028625d2d37d..f7beace455c3 100644
--- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
+++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
@@ -1456,7 +1456,11 @@ static int boe_panel_prepare(struct drm_panel *panel)
usleep_range(1, 11000);
if (boe->desc->lp11_before_reset) {
- mipi_dsi_dcs_nop(boe->dsi);
+ ret = mipi_dsi_dcs_nop(boe->dsi);
+ if (ret < 0) {
+ dev_err(>dsi->dev, "Failed to send NOP: %d\n",
ret);
+ goto poweroff;
+ }
usleep_range(1000, 2000);
}
gpiod_set_value(boe->enable_gpio, 1);
--
2.45.0.rc1.225.g2a3ae87e7f-goog
