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| author | Douglas Anderson <dianders@chromium.org> | 2024-05-18 00:36:38 +0300 |
|---|---|---|
| committer | Neil Armstrong <neil.armstrong@linaro.org> | 2024-05-21 11:01:20 +0300 |
| commit | 6320b9199dd99622668649c234d4e8a99e44a9c8 (patch) | |
| tree | 56d77e4524f4cf89c0d1d0557da871ca10bf7d6a /drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | |
| parent | 587c48f622374e5d47b1d515c6006a4df4dee882 (diff) | |
| download | linux-6320b9199dd99622668649c234d4e8a99e44a9c8.tar.xz | |
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 <dianders@chromium.org>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
Reviewed-by: Linus Walleij <linus.walleij@linaro.org>
Link: https://lore.kernel.org/r/20240517143643.3.Ibffbaa5b4999ac0e55f43bf353144433b099d727@changeid
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240517143643.3.Ibffbaa5b4999ac0e55f43bf353144433b099d727@changeid
Diffstat (limited to 'drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c')
| -rw-r--r-- | drivers/gpu/drm/panel/panel-boe-tv101wum-nl6.c | 6 |
1 files changed, 5 insertions, 1 deletions
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(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); |