Patch "drm/panel: boe-tv101wum-nl6: Check for errors on the NOP in prepare()" has been added to the 6.1-stable tree

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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 6.1-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-6.1 subdirectory.

If you, or anyone else, feels it should not be added to the stable tree,
please let <stable@xxxxxxxxxxxxxxx> know about it.



commit 0db598ef835a53c4367f056b40297f2aefc6569d
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 b26c4a09d0912..820d8d29b62bd 100644
--- a/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
+++ b/drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c
@@ -1271,7 +1271,11 @@ static int boe_panel_prepare(struct drm_panel *panel)
 	usleep_range(10000, 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(&boe->dsi->dev, "Failed to send NOP: %d\n", ret);
+			goto poweroff;
+		}
 		usleep_range(1000, 2000);
 	}
 	gpiod_set_value(boe->enable_gpio, 1);




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