From: Dmitry Osipenko <digetx@gmail.com>
To: Thierry Reding <thierry.reding@gmail.com>,
Sam Ravnborg <sam@ravnborg.org>,
Laurent Pinchart <laurent.pinchart@ideasonboard.com>,
Rob Herring <robh+dt@kernel.org>,
Frank Rowand <frowand.list@gmail.com>
Cc: linux-tegra@vger.kernel.org, devicetree@vger.kernel.org,
linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org
Subject: [PATCH v5 4/6] drm/tegra: output: Support DRM bridges
Date: Sat, 18 Apr 2020 20:07:01 +0300 [thread overview]
Message-ID: <20200418170703.1583-5-digetx@gmail.com> (raw)
In-Reply-To: <20200418170703.1583-1-digetx@gmail.com>
Newer Tegra device-trees will specify a video output graph which involves
a bridge. This patch adds initial support for the DRM bridges to the Tegra
DRM output.
Signed-off-by: Dmitry Osipenko <digetx@gmail.com>
---
drivers/gpu/drm/tegra/drm.h | 2 ++
drivers/gpu/drm/tegra/output.c | 12 ++++++++++++
2 files changed, 14 insertions(+)
diff --git a/drivers/gpu/drm/tegra/drm.h b/drivers/gpu/drm/tegra/drm.h
index 804869799305..cccd368b6752 100644
--- a/drivers/gpu/drm/tegra/drm.h
+++ b/drivers/gpu/drm/tegra/drm.h
@@ -12,6 +12,7 @@
#include <linux/of_gpio.h>
#include <drm/drm_atomic.h>
+#include <drm/drm_bridge.h>
#include <drm/drm_edid.h>
#include <drm/drm_encoder.h>
#include <drm/drm_fb_helper.h>
@@ -116,6 +117,7 @@ struct tegra_output {
struct device_node *of_node;
struct device *dev;
+ struct drm_bridge *bridge;
struct drm_panel *panel;
struct i2c_adapter *ddc;
const struct edid *edid;
diff --git a/drivers/gpu/drm/tegra/output.c b/drivers/gpu/drm/tegra/output.c
index a6a711d54e88..ccd1421f1b24 100644
--- a/drivers/gpu/drm/tegra/output.c
+++ b/drivers/gpu/drm/tegra/output.c
@@ -5,6 +5,7 @@
*/
#include <drm/drm_atomic_helper.h>
+#include <drm/drm_of.h>
#include <drm/drm_panel.h>
#include <drm/drm_simple_kms_helper.h>
@@ -99,8 +100,19 @@ int tegra_output_probe(struct tegra_output *output)
if (!output->of_node)
output->of_node = output->dev->of_node;
+ err = drm_of_find_panel_or_bridge(output->of_node, -1, -1,
+ &output->panel, &output->bridge);
+ if (err && err != -ENODEV)
+ return err;
+
panel = of_parse_phandle(output->of_node, "nvidia,panel", 0);
if (panel) {
+ /*
+ * Don't mix nvidia,panel phandle with the graph in a
+ * device-tree.
+ */
+ WARN_ON(output->panel || output->bridge);
+
output->panel = of_drm_find_panel(panel);
of_node_put(panel);
--
2.26.0
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next prev parent reply other threads:[~2020-04-20 6:55 UTC|newest]
Thread overview: 18+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-04-18 17:06 [PATCH v5 0/6] Support DRM bridges on NVIDIA Tegra Dmitry Osipenko
2020-04-18 17:06 ` [PATCH v5 1/6] of_graph: add of_graph_get_local_port() Dmitry Osipenko
2020-04-30 14:10 ` Rob Herring
2020-05-06 16:32 ` Sam Ravnborg
2020-05-11 20:27 ` Rob Herring
2020-04-18 17:06 ` [PATCH v5 2/6] drm/of: Make drm_of_find_panel_or_bridge() to check graph's presence Dmitry Osipenko
2020-05-06 16:41 ` Sam Ravnborg
2020-05-06 17:05 ` Dmitry Osipenko
2020-04-18 17:07 ` [PATCH v5 3/6] drm/tegra: output: Don't leak OF node on error Dmitry Osipenko
2020-05-06 16:42 ` Sam Ravnborg
2020-04-18 17:07 ` Dmitry Osipenko [this message]
2020-05-06 16:43 ` [PATCH v5 4/6] drm/tegra: output: Support DRM bridges Sam Ravnborg
2020-04-18 17:07 ` [PATCH v5 5/6] drm/tegra: output: rgb: Support LVDS encoder bridge Dmitry Osipenko
2020-05-06 16:45 ` Sam Ravnborg
2020-04-18 17:07 ` [PATCH v5 6/6] drm/tegra: output: rgb: Wrap directly-connected panel into DRM bridge Dmitry Osipenko
2020-04-25 17:02 ` Sam Ravnborg
2020-04-25 21:51 ` Dmitry Osipenko
2020-05-24 18:41 ` [PATCH v5 0/6] Support DRM bridges on NVIDIA Tegra Dmitry Osipenko
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