From: Rob Clark <robdclark@gmail.com>
To: dri-devel@lists.freedesktop.org, linux-arm-msm@vger.kernel.org
Cc: freedreno@lists.freedesktop.org,
aarch64-laptops@lists.linaro.org,
Rob Clark <robdclark@chromium.org>,
Maarten Lankhorst <maarten.lankhorst@linux.intel.com>,
Maxime Ripard <maxime.ripard@bootlin.com>,
Sean Paul <sean@poorly.run>, David Airlie <airlied@linux.ie>,
Daniel Vetter <daniel@ffwll.ch>,
linux-kernel@vger.kernel.org
Subject: [PATCH 3/4] drm: add helper to lookup panel-id
Date: Sun, 30 Jun 2019 13:36:07 -0700 [thread overview]
Message-ID: <20190630203614.5290-4-robdclark@gmail.com> (raw)
In-Reply-To: <20190630203614.5290-1-robdclark@gmail.com>
From: Rob Clark <robdclark@chromium.org>
Finds the panel-id from chosen, so drivers can use this to pick the
correct endpoint when looking up panel.
Signed-off-by: Rob Clark <robdclark@chromium.org>
---
drivers/gpu/drm/drm_of.c | 21 +++++++++++++++++++++
include/drm/drm_of.h | 7 +++++++
2 files changed, 28 insertions(+)
diff --git a/drivers/gpu/drm/drm_of.c b/drivers/gpu/drm/drm_of.c
index 43d89dd59c6b..3ba65750048b 100644
--- a/drivers/gpu/drm/drm_of.c
+++ b/drivers/gpu/drm/drm_of.c
@@ -279,3 +279,24 @@ int drm_of_find_panel_or_bridge(const struct device_node *np,
return ret;
}
EXPORT_SYMBOL_GPL(drm_of_find_panel_or_bridge);
+
+/**
+ * drm_of_find_panel_id - return id of panel from chosen
+ *
+ * Returns the panel id, or zero if none specified
+ */
+int drm_of_find_panel_id(void)
+{
+ struct device_node *np = NULL;
+ u32 panel_id;
+
+ np = of_find_node_by_path("/chosen");
+ if (!np)
+ return 0;
+
+ if (of_property_read_u32(np, "panel-id", &panel_id))
+ return 0;
+
+ return panel_id;
+}
+EXPORT_SYMBOL_GPL(drm_of_find_panel_id);
diff --git a/include/drm/drm_of.h b/include/drm/drm_of.h
index ead34ab5ca4e..6cd2d59cb1db 100644
--- a/include/drm/drm_of.h
+++ b/include/drm/drm_of.h
@@ -35,6 +35,8 @@ int drm_of_find_panel_or_bridge(const struct device_node *np,
int port, int endpoint,
struct drm_panel **panel,
struct drm_bridge **bridge);
+int drm_of_find_panel_id(void);
+
#else
static inline uint32_t drm_of_crtc_port_mask(struct drm_device *dev,
struct device_node *port)
@@ -77,6 +79,11 @@ static inline int drm_of_find_panel_or_bridge(const struct device_node *np,
{
return -EINVAL;
}
+
+static inline int drm_of_find_panel_id(void)
+{
+ return 0;
+}
#endif
/*
--
2.20.1
next prev parent reply other threads:[~2019-06-30 20:36 UTC|newest]
Thread overview: 29+ messages / expand[flat|nested] mbox.gz Atom feed top
2019-06-30 20:36 [PATCH 0/4] drm+dt+efi: support devices with multiple possible panels Rob Clark
2019-06-30 20:36 ` [PATCH 1/4] dt-bindings: chosen: document panel-id binding Rob Clark
2019-07-01 14:03 ` Rob Herring
2019-07-01 14:28 ` Jeffrey Hugo
2019-07-01 14:41 ` Rob Clark
2019-11-30 18:37 ` Rob Clark
2019-11-30 18:39 ` Rob Clark
2019-06-30 20:36 ` [PATCH 2/4] efi/libstub: detect panel-id Rob Clark
2019-07-02 20:26 ` Ard Biesheuvel
2019-07-02 20:35 ` Ard Biesheuvel
2019-07-02 21:01 ` Rob Clark
2019-07-02 21:53 ` Ard Biesheuvel
2019-07-02 22:36 ` Rob Clark
2019-07-02 21:59 ` Leif Lindholm
2019-07-02 22:48 ` Rob Clark
2019-07-03 16:33 ` Leif Lindholm
2019-07-03 17:41 ` Rob Clark
2019-07-03 17:54 ` Ard Biesheuvel
2019-06-30 20:36 ` Rob Clark [this message]
2019-06-30 20:36 ` [PATCH 4/4] drm/bridge: ti-sn65dsi86: use helper to lookup panel-id Rob Clark
2019-06-30 21:17 ` Laurent Pinchart
2019-06-30 21:50 ` Rob Clark
2019-06-30 21:57 ` Laurent Pinchart
2019-06-30 22:04 ` Rob Clark
2019-06-30 20:47 ` [PATCH 0/4] drm+dt+efi: support devices with multiple possible panels Laurent Pinchart
2019-06-30 21:05 ` Rob Clark
2019-06-30 21:15 ` Laurent Pinchart
2019-06-30 21:35 ` Rob Clark
2019-07-02 12:50 ` Rob Clark
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