[PATCH v2 22/23] drm/msm: Register the DCP backend

[Jayant Shekhar]

The DCP platform driver provides an MSM KMS backend. Register it from the
MSM DRM driver init and exit paths so the VirtIO driver can use the backend
when the DCP function is discovered.

Add DCP registration hooks with no-op stubs when CONFIG_DRM_MSM_DCP is
disabled. This keeps backend registration consistent with the other MSM
display backends while allowing DCP support to remain optional.

Assisted-by: LLM
Signed-off-by: Jayant Shekhar <jayant.shekhar@xxxxxxxxxxxxxxxx>
---
 drivers/gpu/drm/msm/msm_drv.c | 2 ++
 drivers/gpu/drm/msm/msm_drv.h | 8 ++++++++
 2 files changed, 10 insertions(+)

diff --git a/drivers/gpu/drm/msm/msm_drv.c b/drivers/gpu/drm/msm/msm_drv.c
index 5816c64d7ce7..d413c361c442 100644
--- a/drivers/gpu/drm/msm/msm_drv.c
+++ b/drivers/gpu/drm/msm/msm_drv.c
@@ -1208,6 +1208,7 @@ static int __init msm_drm_register(void)
 	DBG("init");
 	msm_mdp_register();
 	msm_dpu_register();
+	msm_dcp_register();
 	msm_dsi_register();
 	msm_hdmi_register();
 	msm_dp_register();
@@ -1229,6 +1230,7 @@ static void __exit msm_drm_unregister(void)
 	msm_dsi_unregister();
 	msm_mdp_unregister();
 	msm_dpu_unregister();
+	msm_dcp_unregister();
 }
 
 module_init(msm_drm_register);
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index aa5dfd82ac6f..befaa9f2cb5c 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -417,6 +417,14 @@ static inline void msm_dpu_register(void) {}
 static inline void msm_dpu_unregister(void) {}
 #endif
 
+#ifdef CONFIG_DRM_MSM_DCP
+void msm_dcp_register(void);
+void msm_dcp_unregister(void);
+#else
+static inline void msm_dcp_register(void) {}
+static inline void msm_dcp_unregister(void) {}
+#endif
+
 #ifdef CONFIG_DRM_MSM_MDSS
 void msm_mdss_register(void);
 void msm_mdss_unregister(void);

-- 
2.43.0