This is a note to let you know that I've just added the patch titled
drm/panel: boe-tv101wum-nl6: Check for errors on the NOP in prepare()
to the 5.15-stable tree which can be found at:
http://www.kernel.org/git/?p=linux/kernel/git/stable/stable-queue.git;a=summary
The filename of the patch is:
drm-panel-boe-tv101wum-nl6-check-for-errors-on-the-n.patch
and it can be found in the queue-5.15 subdirectory.
If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.
commit 8846780f6f54f3278cb99bb0dfc74a6815a29f60
Author: Douglas Anderson <dianders@xxxxxxxxxxxx>
Date: Fri May 17 14:36:38 2024 -0700
drm/panel: boe-tv101wum-nl6: Check for errors on the NOP in prepare()
[ Upstream commit 6320b9199dd99622668649c234d4e8a99e44a9c8 ]
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 <dianders@xxxxxxxxxxxx>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@xxxxxxxxxxxxx>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx>
Reviewed-by: Linus Walleij <linus.walleij@xxxxxxxxxx>
Link: https://lore.kernel.org/r/20240517143643.3.Ibffbaa5b4999ac0e55f43bf353144433b099d727@changeid
Signed-off-by: Neil Armstrong <neil.armstrong@xxxxxxxxxx>
Link: https://patchwork.freedesktop.org/patch/msgid/20240517143643.3.Ibffbaa5b4999ac0e55f43bf353144433b099d727@changeid
Signed-off-by: Sasha Levin <sashal@xxxxxxxxxx>
diff --git a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
index c448be3d01d16..0a2d5f461aee8 100644
--- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
+++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
@@ -553,7 +553,11 @@ static int boe_panel_prepare(struct drm_panel *panel)
usleep_range(5000, 10000);
if (boe->desc->lp11_before_reset) {
- mipi_dsi_dcs_nop(boe->dsi);
+ ret = mipi_dsi_dcs_nop(boe->dsi);
+ if (ret < 0) {
+ dev_err(&boe->dsi->dev, "Failed to send NOP: %d\n", ret);
+ goto poweroff;
+ }
usleep_range(1000, 2000);
}
gpiod_set_value(boe->enable_gpio, 1);
