linux-kernel - [PATCH v3 0/3] drm/panel: novatek-nt35560: Fix bug and clean up

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Message-ID: <20250730061748.1227643-1-me@brighamcampbell.com>
Date: Wed, 30 Jul 2025 00:17:45 -0600
From: Brigham Campbell <me@...ghamcampbell.com>
To: maarten.lankhorst@...ux.intel.com,
	mripard@...nel.org,
	tzimmermann@...e.de,
	airlied@...il.com,
	simona@...ll.ch,
	linus.walleij@...aro.org,
	neil.armstrong@...aro.org,
	jessica.zhang@....qualcomm.com,
	sam@...nborg.org
Cc: dianders@...omium.org,
	skhan@...uxfoundation.org,
	linux-kernel-mentees@...ts.linux.dev,
	dri-devel@...ts.freedesktop.org,
	linux-kernel@...r.kernel.org,
	Brigham Campbell <me@...ghamcampbell.com>
Subject: [PATCH v3 0/3] drm/panel: novatek-nt35560: Fix bug and clean up

Fix bug in novatek-nt35560 driver's nt35560_set_brightness() which
causes the driver to incorrectly report that it "failed to disable
display backlight".

Add mipi_dsi_dcs_read_multi() to drm_mipi_dsi.c for improved error
handling in drivers which use mipi_dsi_dcs_read() multiple times in a
row. Add mipi_dsi_dcs_write_var_seq_multi() and
mipi_dsi_generic_write_var_seq_multi() to drm_mipi_dsi.h to allow
drivers to more conveniently construct MIPI payloads at runtime.

Clean up novatek-nt35560 driver to use "multi" variants of MIPI.

Changes to v3:
 - Fix incorrect Fixes tag. The bug was introduced by an earlier commit.
 - Minor formatting improvements.

Changes to v2:
 - Separate bug fix into its own commit for backporting.
 - Add var_seq_multi() variants of MIPI write macros for sending
   non-static MIPI messages.
 - Minor formatting improvements.

Brigham Campbell (3):
  drm/panel: novatek-nt35560: Fix invalid return value
  drm: Add MIPI read_multi func and two write macros
  drm/panel: novatek-nt35560: Clean up driver

 drivers/gpu/drm/drm_mipi_dsi.c                |  37 ++++
 drivers/gpu/drm/panel/panel-novatek-nt35560.c | 198 ++++++------------
 include/drm/drm_mipi_dsi.h                    |  35 ++++
 3 files changed, 132 insertions(+), 138 deletions(-)


base-commit: 33f8f321e7aa7715ce19560801ee5223ba8b9a7d
-- 
2.50.1