diff options
author | Douglas Anderson <dianders@chromium.org> | 2024-03-14 00:12:14 +0300 |
---|---|---|
committer | Greg Kroah-Hartman <gregkh@linuxfoundation.org> | 2024-06-12 12:03:21 +0300 |
commit | 743ce5a1f2f0d7e6a3daec675314ebff4205489b (patch) | |
tree | 60f9617f195c2f93be8cdb7efae56651181ff653 /drivers/gpu | |
parent | 90bd113e65fc5a22640aefb262f397974bfb3d33 (diff) | |
download | linux-743ce5a1f2f0d7e6a3daec675314ebff4205489b.tar.xz |
drm/panel: atna33xc20: Fix unbalanced regulator in the case HPD doesn't assert
[ Upstream commit 5e842d55bad7794823a50f24fd645b58f2ef93ab ]
When the atna33xc20 driver was first written the resume code never
returned an error. If there was a problem waiting for HPD it just
printed a warning and moved on. This changed in response to review
feedback [1] on a future patch but I accidentally didn't account for
rolling back the regulator enable in the error cases. Do so now.
[1] https://lore.kernel.org/all/5f3cf3a6-1cc2-63e4-f76b-4ee686764705@linaro.org/
Fixes: 3b5765df375c ("drm/panel: atna33xc20: Take advantage of wait_hpd_asserted() in struct drm_dp_aux")
Acked-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Signed-off-by: Douglas Anderson <dianders@chromium.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20240313-homestarpanel-regulator-v1-1-b8e3a336da12@chromium.org
Signed-off-by: Sasha Levin <sashal@kernel.org>
Diffstat (limited to 'drivers/gpu')
-rw-r--r-- | drivers/gpu/drm/panel/panel-samsung-atna33xc20.c | 22 |
1 files changed, 13 insertions, 9 deletions
diff --git a/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c b/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c index 8fa15321c22f..5b698514957c 100644 --- a/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c +++ b/drivers/gpu/drm/panel/panel-samsung-atna33xc20.c @@ -109,19 +109,17 @@ static int atana33xc20_resume(struct device *dev) if (hpd_asserted < 0) ret = hpd_asserted; - if (ret) + if (ret) { dev_warn(dev, "Error waiting for HPD GPIO: %d\n", ret); - - return ret; - } - - if (p->aux->wait_hpd_asserted) { + goto error; + } + } else if (p->aux->wait_hpd_asserted) { ret = p->aux->wait_hpd_asserted(p->aux, HPD_MAX_US); - if (ret) + if (ret) { dev_warn(dev, "Controller error waiting for HPD: %d\n", ret); - - return ret; + goto error; + } } /* @@ -133,6 +131,12 @@ static int atana33xc20_resume(struct device *dev) * right times. */ return 0; + +error: + drm_dp_dpcd_set_powered(p->aux, false); + regulator_disable(p->supply); + + return ret; } static int atana33xc20_disable(struct drm_panel *panel) |