From: Sasha Levin <sashal@kernel.org>
To: linux-kernel@vger.kernel.org, stable@vger.kernel.org
Cc: Sasha Levin <sashal@kernel.org>,
Benjamin Gaignard <benjamin.gaignard@st.com>,
Philippe Cornu <philippe.cornu@st.com>,
dri-devel@lists.freedesktop.org,
Yannick Fertre <yannick.fertre@st.com>,
linux-stm32@st-md-mailman.stormreply.com,
linux-arm-kernel@lists.infradead.org
Subject: [PATCH AUTOSEL 5.4 051/108] drm/stm: ltdc: check crtc state before enabling LIE
Date: Sat, 11 Apr 2020 19:08:46 -0400 [thread overview]
Message-ID: <20200411230943.24951-51-sashal@kernel.org> (raw)
In-Reply-To: <20200411230943.24951-1-sashal@kernel.org>
From: Yannick Fertre <yannick.fertre@st.com>
[ Upstream commit a6bd58c51ac43083f3977057a7ad668def55812f ]
Following investigations of a hardware bug, the LIE interrupt
can occur while the display controller is not activated.
LIE interrupt (vblank) don't have to be set if the CRTC is not
enabled.
Signed-off-by: Yannick Fertre <yannick.fertre@st.com>
Acked-by: Philippe Cornu <philippe.cornu@st.com>
Signed-off-by: Benjamin Gaignard <benjamin.gaignard@st.com>
Link: https://patchwork.freedesktop.org/patch/msgid/1579601650-7055-1-git-send-email-yannick.fertre@st.com
Signed-off-by: Sasha Levin <sashal@kernel.org>
---
drivers/gpu/drm/stm/ltdc.c | 7 ++++++-
1 file changed, 6 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 3ab4fbf8eb0d1..2526dfb77401c 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -653,9 +653,14 @@ static const struct drm_crtc_helper_funcs ltdc_crtc_helper_funcs = {
static int ltdc_crtc_enable_vblank(struct drm_crtc *crtc)
{
struct ltdc_device *ldev = crtc_to_ltdc(crtc);
+ struct drm_crtc_state *state = crtc->state;
DRM_DEBUG_DRIVER("\n");
- reg_set(ldev->regs, LTDC_IER, IER_LIE);
+
+ if (state->enable)
+ reg_set(ldev->regs, LTDC_IER, IER_LIE);
+ else
+ return -EPERM;
return 0;
}
--
2.20.1
_______________________________________________
linux-arm-kernel mailing list
linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel
next prev parent reply other threads:[~2020-04-11 23:17 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
[not found] <20200411230943.24951-1-sashal@kernel.org>
2020-04-11 23:07 ` [PATCH AUTOSEL 5.4 003/108] net: axienet: Convert DMA error handler to a work queue Sasha Levin
2020-04-11 23:08 ` [PATCH AUTOSEL 5.4 006/108] mmc: sdhci-esdhc-imx: restore pin state when resume back Sasha Levin
2020-04-11 23:08 ` [PATCH AUTOSEL 5.4 042/108] drm/sun4i: dsi: Use NULL to signify "no panel" Sasha Levin
2020-04-11 23:08 ` [PATCH AUTOSEL 5.4 043/108] mt76: fix handling full tx queues in mt76_dma_tx_queue_skb_raw Sasha Levin
2020-04-11 23:08 ` Sasha Levin [this message]
2020-04-11 23:08 ` [PATCH AUTOSEL 5.4 058/108] ASoC: mediatek: mt8183-da7219: pull TDM GPIO pins down when probed Sasha Levin
2020-04-11 23:08 ` [PATCH AUTOSEL 5.4 060/108] mt76: mt7603: fix input validation issues for powersave-filtered frames Sasha Levin
2020-04-11 23:09 ` [PATCH AUTOSEL 5.4 076/108] net: axienet: Propagate failure of DMA descriptor setup Sasha Levin
2020-04-11 23:09 ` [PATCH AUTOSEL 5.4 085/108] ASoC: stm32: spdifrx: fix regmap status check Sasha Levin
2020-04-11 23:09 ` [PATCH AUTOSEL 5.4 090/108] dmaengine: stm32-dma: use reset controller only at probe time Sasha Levin
2020-04-11 23:09 ` [PATCH AUTOSEL 5.4 094/108] scsi: ufs: Fix ufshcd_hold() caused scheduling while atomic Sasha Levin
2020-04-11 23:09 ` [PATCH AUTOSEL 5.4 095/108] ARM: shmobile: Enable ARM_GLOBAL_TIMER on Cortex-A9 MPCore SoCs Sasha Levin
2020-04-12 8:44 ` Geert Uytterhoeven
2020-04-17 17:18 ` Sasha Levin
2020-04-11 23:09 ` [PATCH AUTOSEL 5.4 098/108] arm64: dts: g12-common: add parkmode_disable_ss_quirk on DWC3 controller Sasha Levin
2020-04-11 23:09 ` [PATCH AUTOSEL 5.4 107/108] rtc: imx-sc: Align imx sc msg structs to 4 Sasha Levin
Reply instructions:
You may reply publicly to this message via plain-text email
using any one of the following methods:
* Save the following mbox file, import it into your mail client,
and reply-to-all from there: mbox
Avoid top-posting and favor interleaved quoting:
https://en.wikipedia.org/wiki/Posting_style#Interleaved_style
* Reply using the --to, --cc, and --in-reply-to
switches of git-send-email(1):
git send-email \
--in-reply-to=20200411230943.24951-51-sashal@kernel.org \
--to=sashal@kernel.org \
--cc=benjamin.gaignard@st.com \
--cc=dri-devel@lists.freedesktop.org \
--cc=linux-arm-kernel@lists.infradead.org \
--cc=linux-kernel@vger.kernel.org \
--cc=linux-stm32@st-md-mailman.stormreply.com \
--cc=philippe.cornu@st.com \
--cc=stable@vger.kernel.org \
--cc=yannick.fertre@st.com \
/path/to/YOUR_REPLY
https://kernel.org/pub/software/scm/git/docs/git-send-email.html
* If your mail client supports setting the In-Reply-To header
via mailto: links, try the mailto: link
Be sure your reply has a Subject: header at the top and a blank line
before the message body.
This is a public inbox, see mirroring instructions
for how to clone and mirror all data and code used for this inbox;
as well as URLs for NNTP newsgroup(s).