From: Andrzej Pietrasiewicz <andrzej.p@collabora•com>
Cc: linux-samsung-soc@vger•kernel.org,
Joonyoung Shim <jy0922.shim@samsung•com>,
Maxime Ripard <maxime.ripard@bootlin•com>,
Seung-Woo Kim <sw0312.kim@samsung•com>,
Maarten Lankhorst <maarten.lankhorst@linux•intel.com>,
linux-kernel@vger•kernel.org,
Krzysztof Kozlowski <krzk@kernel•org>,
Inki Dae <inki.dae@samsung•com>, David Airlie <airlied@linux•ie>,
Kyungmin Park <kyungmin.park@samsung•com>,
Kukjin Kim <kgene@kernel•org>,
dri-devel@lists•freedesktop.org, Daniel Vetter <daniel@ffwll•ch>,
kernel@collabora•com, Sean Paul <sean@poorly•run>,
linux-arm-kernel@lists•infradead.org, m.szyprowski@samsung•com
Subject: [PATCH 0/2] Associate ddc adapters with connectors
Date: Tue, 25 Jun 2019 11:46:34 +0200 [thread overview]
Message-ID: <cover.1561452052.git.andrzej.p@collabora.com> (raw)
It is difficult for a user to know which of the i2c adapters is for which
drm connector. This series addresses this problem.
The idea is to have a symbolic link in connector's sysfs directory, e.g.:
ls -l /sys/class/drm/card0-HDMI-A-1/i2c-2
lrwxrwxrwx 1 root root 0 Jun 24 10:42 /sys/class/drm/card0-HDMI-A-1/i2c-2 \
-> ../../../../soc/13880000.i2c/i2c-2
The user then knows that their card0-HDMI-A-1 uses i2c-2 and can e.g. run
ddcutil:
ddcutil -b 2 getvcp 0x10
VCP code 0x10 (Brightness ): current value = 90, max value = 100
The first patch in the series adds struct i2c_adapter pointer to struct
drm_connector. If the field is used by a particular driver, then an
appropriate symbolic link is created by the generic code, which is also added
by this patch.
The second patch is an example of how to convert a driver to this new scheme.
Andrzej Pietrasiewicz (2):
drm: Include ddc adapter pointer in struct drm_connector
drm/exynos: Provide ddc symlink in connector's sysfs
drivers/gpu/drm/drm_sysfs.c | 9 +++++++++
drivers/gpu/drm/exynos/exynos_hdmi.c | 11 +++++------
include/drm/drm_connector.h | 11 +++++++++++
3 files changed, 25 insertions(+), 6 deletions(-)
--
2.17.1
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next reply other threads:[~2019-06-25 9:46 UTC|newest]
Thread overview: 16+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-25 9:46 Andrzej Pietrasiewicz [this message]
2019-06-25 9:46 ` [PATCH 1/2] drm: Include ddc adapter pointer in struct drm_connector Andrzej Pietrasiewicz
2019-06-25 9:46 ` [PATCH 2/2] drm/exynos: Provide ddc symlink in connector's sysfs Andrzej Pietrasiewicz
2019-06-25 10:03 ` [PATCH 0/2] Associate ddc adapters with connectors Russell King - ARM Linux admin
2019-06-25 10:14 ` Andrzej Pietrasiewicz
2019-06-25 10:16 ` Russell King - ARM Linux admin
2019-06-25 10:24 ` [PATCH v2 " Andrzej Pietrasiewicz
2019-06-25 10:24 ` [PATCH v2 1/2] drm: Include ddc adapter pointer in struct drm_connector Andrzej Pietrasiewicz
2019-06-25 14:21 ` Daniel Vetter
2019-06-25 10:24 ` [PATCH v2 2/2] drm/exynos: Provide ddc symlink in connector's sysfs Andrzej Pietrasiewicz
2019-06-25 13:36 ` [PATCH 0/2] Associate ddc adapters with connectors Emil Velikov
2019-06-25 14:07 ` Daniel Vetter
2019-06-25 14:10 ` Russell King - ARM Linux admin
2019-06-25 14:20 ` Daniel Vetter
2019-06-26 6:50 ` Andrzej Pietrasiewicz
[not found] ` <cover.1561735433.git.andrzej.p@collabora.com>
[not found] ` <d6381c020ea1c848a7044d830bdb0ec9663d1619.1561735433.git.andrzej.p@collabora.com>
[not found] ` <9b03d145-ec50-927c-55a8-dff1cd51d655@suse.de>
[not found] ` <cf1984e4-50af-302d-ef67-9ad530118c29@collabora.com>
[not found] ` <CGME20190701144119epcas1p211ec60b63f3c6ae02392e2ae67f1a4ba@epcas1p2.samsung.com>
[not found] ` <9e65f3c0-941d-d04c-5745-6b3a2965b990@suse.de>
2019-07-05 9:44 ` [PATCH v3 01/22] drm: Include ddc adapter pointer in struct drm_connector Andrzej Hajda
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