From: Tobias Johansson <tobias.johansson@axis.com>
To: Alex Lanzano <lanzano.alex@gmail.com>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <mripard@kernel.org>,
Thomas Zimmermann <tzimmermann@suse.de>,
David Airlie <airlied@gmail.com>, Simona Vetter <simona@ffwll.ch>,
Dmitry Baryshkov <lumag@kernel.org>,
"Mehdi Djait" <mehdi.djait@bootlin.com>,
Uwe Kleine-König <u.kleine-koenig@baylibre.com>
Cc: <dri-devel@lists.freedesktop.org>, <linux-kernel@vger.kernel.org>,
"Tobias Johansson" <tobias.johansson@axis.com>, <kernel@axis.com>
Subject: [PATCH 0/2] drm/tiny: sharp-memory: fix TX buffer corruption on partial update
Date: Mon, 30 Mar 2026 09:20:15 +0200 [thread overview]
Message-ID: <20260330-flickering-v1-0-5a192bf4b93d@axis.com> (raw)
Users running applications that submit partial framebuffer updates
(such as LVGL with dirty-region tracking) can observe persistent
flickering on the display when using animations.
The flickering is caused by two bugs that corrupt the TX buffer on
partial updates. The first patch fixes incorrect line address
assignment in sharp_memory_set_tx_buffer_addresses(). The second
patch fixes stale data transmission in
sharp_memory_update_display(). Both patches are needed to fully
eliminate the flickering.
Signed-off-by: Tobias Johansson <tobias.johansson@axis.com>
---
Tobias Johansson (2):
drm/tiny: sharp-memory: fix line address assignment on partial update
drm/tiny: sharp-memory: avoid transmitting stale TX buffer data
drivers/gpu/drm/tiny/sharp-memory.c | 8 ++++----
1 file changed, 4 insertions(+), 4 deletions(-)
---
base-commit: ba683f774299d89d17cde03bb1bdb13f3513cd20
change-id: 20260316-flickering-f9df09243d2f
Best regards,
--
Tobias Johansson <tobias.johansson@axis.com>
next reply other threads:[~2026-03-30 9:06 UTC|newest]
Thread overview: 6+ messages / expand[flat|nested] mbox.gz Atom feed top
2026-03-30 7:20 Tobias Johansson [this message]
2026-03-30 7:20 ` [PATCH 1/2] drm/tiny: sharp-memory: fix line address assignment on partial update Tobias Johansson
2026-03-31 7:34 ` Claude review: " Claude Code Review Bot
2026-03-30 7:20 ` [PATCH 2/2] drm/tiny: sharp-memory: avoid transmitting stale TX buffer data Tobias Johansson
2026-03-31 7:34 ` Claude review: " Claude Code Review Bot
2026-03-31 7:34 ` Claude review: drm/tiny: sharp-memory: fix TX buffer corruption on partial update Claude Code Review Bot
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