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@intel.com Reviewed-by: Bob Paauwe bob.j.paauwe@intel.com --- 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);