Hook up drm_panel support in the omapdrm driver. The change is
relatively simply as the way has been paved by drm_bridge support
already. In addition to looking up, attaching to and detaching from the
panel, we only need to add panel support in the connector .get_modes()
handler, take connector bus flags (set by the panel) into account, and
enable/disable the panel in the encoder enable/disable operations
handlers.
Signed-off-by: Laurent Pinchart <laurent.pinchart@xxxxxxxxxxxxxxxx>
---
drivers/gpu/drm/omapdrm/dss/base.c | 12 +++++----
drivers/gpu/drm/omapdrm/dss/omapdss.h | 1 +
drivers/gpu/drm/omapdrm/dss/output.c | 7 +++++-
drivers/gpu/drm/omapdrm/omap_connector.c | 9 +++++++
drivers/gpu/drm/omapdrm/omap_drv.c | 15 ++++++++++-
drivers/gpu/drm/omapdrm/omap_encoder.c | 32 +++++++++++++++++-------
6 files changed, 60 insertions(+), 16 deletions(-)
diff --git a/drivers/gpu/drm/omapdrm/dss/base.c b/drivers/gpu/drm/omapdrm/dss/base.c
index fd624a2e9e63..51347a08b151 100644
--- a/drivers/gpu/drm/omapdrm/dss/base.c
+++ b/drivers/gpu/drm/omapdrm/dss/base.c
@@ -157,7 +157,8 @@ struct omap_dss_device *omapdss_device_next_output(struct omap_dss_device *from)
goto done;
}
- if (dssdev->id && (dssdev->next || dssdev->bridge))
+ if (dssdev->id &&
+ (dssdev->next || dssdev->bridge || dssdev->panel))
goto done;
}
@@ -192,10 +193,11 @@ int omapdss_device_connect(struct dss_device *dss,
if (!dst) {
/*
* The destination is NULL when the source is connected to a
- * bridge instead of a DSS device. Stop here, we will attach the
- * bridge later when we will have a DRM encoder.
+ * bridge or panel instead of a DSS device. Stop here, we will
+ * attach the bridge or panel later when we will have a DRM
+ * encoder.
*/
- return src && src->bridge ? 0 : -EINVAL;
+ return src && (src->bridge || src->panel) ? 0 : -EINVAL;
}
if (omapdss_device_is_connected(dst))
@@ -223,7 +225,7 @@ void omapdss_device_disconnect(struct omap_dss_device *src,
dst ? dev_name(dst->dev) : "NULL");
if (!dst) {
- WARN_ON(!src->bridge);
+ WARN_ON(!src->bridge && !src->panel);
return;
}
diff --git a/drivers/gpu/drm/omapdrm/dss/omapdss.h b/drivers/gpu/drm/omapdrm/dss/omapdss.h
index e1657f2a2e51..f8a2aeb73c6b 100644
--- a/drivers/gpu/drm/omapdrm/dss/omapdss.h
+++ b/drivers/gpu/drm/omapdrm/dss/omapdss.h
@@ -411,6 +411,7 @@ struct omap_dss_device {
struct dss_device *dss;
struct omap_dss_device *next;
struct drm_bridge *bridge;
+ struct drm_panel *panel;
struct list_head list;
diff --git a/drivers/gpu/drm/omapdrm/dss/output.c b/drivers/gpu/drm/omapdrm/dss/output.c
index c8230a3fabca..b209c3645ed3 100644
--- a/drivers/gpu/drm/omapdrm/dss/output.c
+++ b/drivers/gpu/drm/omapdrm/dss/output.c
@@ -22,6 +22,8 @@
#include <linux/of.h>
#include <linux/of_graph.h>
+#include <drm/drm_panel.h>
+
#include "dss.h"
#include "omapdss.h"
@@ -37,6 +39,9 @@ int omapdss_device_init_output(struct omap_dss_device *out)
out->next = omapdss_find_device_by_node(remote_node);
out->bridge = of_drm_find_bridge(remote_node);
+ out->panel = of_drm_find_panel(remote_node);
+ if (IS_ERR(out->panel))
+ out->panel = NULL;
of_node_put(remote_node);
@@ -47,7 +52,7 @@ int omapdss_device_init_output(struct omap_dss_device *out)
return -EINVAL;
}
- return out->next || out->bridge ? 0 : -EPROBE_DEFER;
+ return out->next || out->bridge || out->panel ? 0 : -EPROBE_DEFER;
}
EXPORT_SYMBOL(omapdss_device_init_output);
diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
index f528baa80114..2da16f00cfae 100644
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -18,6 +18,7 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
+#include <drm/drm_panel.h>
#include "omap_drv.h"
@@ -211,6 +212,7 @@ static int omap_connector_get_modes_edid(struct drm_connector *connector,
static int omap_connector_get_modes(struct drm_connector *connector)
{
+ struct omap_connector *omap_connector = to_omap_connector(connector);
struct omap_dss_device *dssdev;
DBG("%s", connector->name);
@@ -233,6 +235,13 @@ static int omap_connector_get_modes(struct drm_connector *connector)
if (dssdev)
return dssdev->ops->get_modes(dssdev, connector);
+ /*
+ * Otherwise if the display pipeline uses a drm_panel, we delegate the
+ * operation to the panel API.
+ */
+ if (omap_connector->output->panel)
+ return drm_panel_get_modes(omap_connector->output->panel);
+
/*
* We can't retrieve modes, which can happen for instance for a DVI or
* VGA output with the DDC bus unconnected. The KMS core will add the
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.c b/drivers/gpu/drm/omapdrm/omap_drv.c
index 517bd33ae181..21fab6dea246 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.c
+++ b/drivers/gpu/drm/omapdrm/omap_drv.c
@@ -23,6 +23,7 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_fb_helper.h>
+#include <drm/drm_panel.h>
#include "omap_dmm_tiler.h"
#include "omap_drv.h"
@@ -137,6 +138,9 @@ static void omap_disconnect_pipelines(struct drm_device *ddev)
for (i = 0; i < priv->num_pipes; i++) {
struct omap_drm_pipeline *pipe = &priv->pipes[i];
+ if (pipe->output->panel)
+ drm_panel_detach(pipe->output->panel);
+
omapdss_device_disconnect(NULL, pipe->output);
omapdss_device_put(pipe->output);
@@ -214,13 +218,15 @@ static int omap_display_id(struct omap_dss_device *output)
display = omapdss_display_get(output);
node = display->dev->of_node;
omapdss_device_put(display);
- } else {
+ } else if (output->bridge) {
struct drm_bridge *bridge = output->bridge;
while (bridge->next)
bridge = bridge->next;
node = bridge->of_node;
+ } else if (output->panel) {
+ node = output->panel->dev->of_node;
}
return node ? of_alias_get_id(node, "display") : -ENODEV;
@@ -335,6 +341,13 @@ static int omap_modeset_init(struct drm_device *dev)
return -ENOMEM;
drm_connector_attach_encoder(pipe->connector, encoder);
+
+ if (pipe->output->panel) {
+ ret = drm_panel_attach(pipe->output->panel,
+ pipe->connector);
+ if (ret < 0)
+ return ret;
+ }
}
crtc = omap_crtc_init(dev, pipe, priv->planes[i]);
diff --git a/drivers/gpu/drm/omapdrm/omap_encoder.c b/drivers/gpu/drm/omapdrm/omap_encoder.c
index 308a049ec968..f8abe19b0029 100644
--- a/drivers/gpu/drm/omapdrm/omap_encoder.c
+++ b/drivers/gpu/drm/omapdrm/omap_encoder.c
@@ -20,6 +20,7 @@
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
+#include <drm/drm_panel.h>
#include "omap_drv.h"
@@ -91,8 +92,14 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder,
struct drm_bridge *bridge;
struct videomode vm = { 0 };
bool hdmi_mode;
+ u32 bus_flags;
int r;
+ list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
+ if (connector->encoder == encoder)
+ break;
+ }
+
drm_display_mode_to_videomode(adjusted_mode, &vm);
/*
@@ -108,8 +115,6 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder,
omap_encoder_updata_videomode_flags(&vm, dssdev->bus_flags);
for (bridge = output->bridge; bridge; bridge = bridge->next) {
- u32 bus_flags;
-
if (!bridge->timings)
continue;
@@ -117,6 +122,9 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder,
omap_encoder_updata_videomode_flags(&vm, bus_flags);
}
+ bus_flags = connector->display_info.bus_flags;
+ omap_encoder_updata_videomode_flags(&vm, bus_flags);
+
/* Set timings for all devices in the display pipeline. */
dss_mgr_set_timings(output, &vm);
@@ -126,13 +134,7 @@ static void omap_encoder_mode_set(struct drm_encoder *encoder,
}
/* Set the HDMI mode and HDMI infoframe if applicable. */
- hdmi_mode = false;
- list_for_each_entry(connector, &dev->mode_config.connector_list, head) {
- if (connector->encoder == encoder) {
- hdmi_mode = omap_connector_get_hdmi_mode(connector);
- break;
- }
- }
+ hdmi_mode = omap_connector_get_hdmi_mode(connector);
if (output->ops->hdmi.set_hdmi_mode)
output->ops->hdmi.set_hdmi_mode(output, hdmi_mode);
@@ -155,6 +157,12 @@ static void omap_encoder_disable(struct drm_encoder *encoder)
dev_dbg(dev->dev, "disable(%s)\n", dssdev->name);
+ /* Disable the panel if present. */
+ if (dssdev->panel) {
+ drm_panel_disable(dssdev->panel);
+ drm_panel_unprepare(dssdev->panel);
+ }
+
/*
* Disable the chain of external devices, starting at the one at the
* internal encoder's output.
@@ -204,6 +212,12 @@ static void omap_encoder_enable(struct drm_encoder *encoder)
* internal encoder's output.
*/
omapdss_device_enable(dssdev->next);
+
+ /* Enable the panel if present. */
+ if (dssdev->panel) {
+ drm_panel_prepare(dssdev->panel);
+ drm_panel_enable(dssdev->panel);
+ }
}
static int omap_encoder_atomic_check(struct drm_encoder *encoder,
--
Regards,
Laurent Pinchart
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