Find ADV 7535 from the device tree and get the bridge driver and attach
it to the DRM and the MIPI encoder.
v2: check for valid encoder node
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus@xxxxxxxxx>
Reviewed-by: Bob Paauwe <bob.j.paauwe@xxxxxxxxx>
---
drivers/gpu/drm/kmb/kmb_drv.c | 27 ++++++++++++++++++++++++++-
drivers/gpu/drm/kmb/kmb_dsi.c | 26 +++++++++++++++++++++-----
drivers/gpu/drm/kmb/kmb_dsi.h | 3 ++-
3 files changed, 49 insertions(+), 7 deletions(-)
diff --git a/drivers/gpu/drm/kmb/kmb_drv.c b/drivers/gpu/drm/kmb/kmb_drv.c
index f4553c2..5a2ff9d 100644
--- a/drivers/gpu/drm/kmb/kmb_drv.c
+++ b/drivers/gpu/drm/kmb/kmb_drv.c
@@ -36,10 +36,12 @@ static int kmb_load(struct drm_device *drm, unsigned long flags)
{
struct kmb_drm_private *dev_p = to_kmb(drm);
struct platform_device *pdev = to_platform_device(drm->dev);
+ struct drm_bridge *bridge;
/*struct resource *res;*/
/*u32 version;*/
int irq_lcd, irq_mipi;
int ret;
+ struct device_node *encoder_node;
/* TBD - not sure if clock_get needs to be called here */
/*
@@ -127,7 +129,30 @@ static int kmb_load(struct drm_device *drm, unsigned long flags)
goto setup_fail;
}
- kmb_dsi_init(drm);
+ /* find ADV7535 node and initialize it */
+ encoder_node = of_parse_phandle(drm->dev->of_node, "encoder-slave", 0);
+ if (!encoder_node) {
+ DRM_ERROR("failed to get bridge info from DT\n");
+ ret = -EPROBE_DEFER;
+ goto setup_fail;
+ }
+
+ /* Locate drm bridge from the hdmi encoder DT node */
+ bridge = of_drm_find_bridge(encoder_node);
+ if (!bridge) {
+ DRM_ERROR("failed to get bridge driver from DT\n");
+ ret = -EPROBE_DEFER;
+ goto setup_fail;
+ }
+
+ of_node_put(encoder_node);
+
+ ret = kmb_dsi_init(drm, bridge);
+ if (ret) {
+ DRM_ERROR("failed to initialize DSI\n");
+ goto setup_fail;
+ }
+
ret = drm_irq_install(drm, platform_get_irq(pdev, 0));
if (ret < 0) {
DRM_ERROR("failed to install IRQ handler\n");
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.c b/drivers/gpu/drm/kmb/kmb_dsi.c
index 969890b..09d5805 100644
--- a/drivers/gpu/drm/kmb/kmb_dsi.c
+++ b/drivers/gpu/drm/kmb/kmb_dsi.c
@@ -7,6 +7,7 @@
#include <linux/slab.h>
#include <linux/spinlock.h>
#include <drm/drm_atomic_helper.h>
+#include <drm/drm_bridge.h>
#include <drm/drm_connector.h>
#include <drm/drm_crtc.h>
#include <drm/drm_crtc_helper.h>
@@ -1240,7 +1241,6 @@ static void mipi_tx_init_irqs(struct kmb_drm_private *dev_p,
spin_unlock_irqrestore(&dev_p->irq_lock, irqflags);
}
-
void mipi_tx_handle_irqs(struct kmb_drm_private *dev_p)
{
uint32_t irq_ctrl_stat_0, hs_stat, hs_enable;
@@ -1273,7 +1273,7 @@ void mipi_tx_handle_irqs(struct kmb_drm_private *dev_p)
}
-void kmb_dsi_init(struct drm_device *dev)
+int kmb_dsi_init(struct drm_device *dev, struct drm_bridge *bridge)
{
struct kmb_dsi *kmb_dsi;
struct drm_encoder *encoder;
@@ -1281,21 +1281,27 @@ void kmb_dsi_init(struct drm_device *dev)
struct drm_connector *connector;
struct kmb_dsi_host *host;
struct kmb_drm_private *dev_p = dev->dev_private;
+ int ret = 0;
kmb_dsi = kzalloc(sizeof(*kmb_dsi), GFP_KERNEL);
- if (!kmb_dsi)
- return;
+ if (!kmb_dsi) {
+ DRM_ERROR("failed to allocate kmb_dsi\n");
+ return -ENOMEM;
+ }
kmb_connector = kzalloc(sizeof(*kmb_connector), GFP_KERNEL);
if (!kmb_connector) {
kfree(kmb_dsi);
- return;
+ DRM_ERROR("failed to allocate kmb_connector\n");
+ return -ENOMEM;
}
kmb_dsi->attached_connector = kmb_connector;
connector = &kmb_connector->base;
encoder = &kmb_dsi->base;
+ encoder->possible_crtcs = 1;
+ encoder->possible_clones = 0;
drm_encoder_init(dev, encoder, &kmb_dsi_funcs, DRM_MODE_ENCODER_DSI,
"MIPI-DSI");
@@ -1313,6 +1319,14 @@ void kmb_dsi_init(struct drm_device *dev)
connector->encoder = encoder;
drm_connector_attach_encoder(connector, encoder);
+ /* Link drm_bridge to encoder */
+ ret = drm_bridge_attach(encoder, bridge, NULL, 0);
+ if (ret) {
+ DRM_ERROR("failed to attach bridge to MIPI\n");
+ drm_encoder_cleanup(encoder);
+ return ret;
+ }
+
/* initialize mipi controller */
mipi_tx_init_cntrl(dev_p, &mipi_tx_init_cfg);
@@ -1321,4 +1335,6 @@ void kmb_dsi_init(struct drm_device *dev)
/* irq initialization */
mipi_tx_init_irqs(dev_p, &int_cfg, &mipi_tx_init_cfg.tx_ctrl_cfg);
+
+ return 0;
}
diff --git a/drivers/gpu/drm/kmb/kmb_dsi.h b/drivers/gpu/drm/kmb/kmb_dsi.h
index f7e2f9e..702ad58 100644
--- a/drivers/gpu/drm/kmb/kmb_dsi.h
+++ b/drivers/gpu/drm/kmb/kmb_dsi.h
@@ -18,6 +18,7 @@ struct kmb_dsi {
struct drm_encoder base;
struct kmb_connector *attached_connector;
struct kmb_dsi_host *dsi_host;
+ struct drm_bridge *bridge;
};
struct kmb_dsi_host {
@@ -308,7 +309,7 @@ union mipi_irq_cfg {
} irq_cfg;
};
-void kmb_dsi_init(struct drm_device *dev);
+int kmb_dsi_init(struct drm_device *dev, struct drm_bridge *bridge);
void kmb_plane_destroy(struct drm_plane *plane);
void mipi_tx_handle_irqs(struct kmb_drm_private *dev_p);
--
2.7.4
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