[PATCH] drm/msm: fix display snapshotting if DP or DSI is disabled

[Dmitry Baryshkov <dmitry.baryshkov@linaro.org>]

Fix following warnings generated when either DP or DSI support is
disabled:

drivers/gpu/drm/msm/disp/msm_disp_snapshot_util.c:141:3: error: implicit declaration of function 'msm_dp_snapshot'; did you mean 'msm_dsi_snapshot'? [-Werror=implicit-function-declaration]

drivers/gpu/drm/msm/msm_kms.h:127:26: warning: 'struct msm_disp_state' declared inside parameter list will not be visible outside of this definition or declaration
drivers/gpu/drm/msm/disp/dpu1/dpu_kms.c:867:21: error: initialization of 'void (*)(struct msm_disp_state *, struct msm_kms *)' from incompatible pointer type 'void (*)(struct msm_disp_state *, struct msm_kms *)' [-Werror=incompatible-pointer-types]
drivers/gpu/drm/msm/dsi/dsi.h:94:30: warning: 'struct msm_disp_state' declared inside parameter list will not be visible outside of this definition or declaration

Reported-by: kernel test robot <lkp@intel.com>
Cc: Abhinav Kumar <abhinavk@codeaurora.org>
Fixes: 1c3b7ac1a71d ("drm/msm: pass dump state as a function argument")
Signed-off-by: Dmitry Baryshkov <dmitry.baryshkov@linaro.org>
---
 drivers/gpu/drm/msm/disp/msm_disp_snapshot.h |  1 -
 drivers/gpu/drm/msm/dsi/dsi.h                |  2 --
 drivers/gpu/drm/msm/msm_drv.h                | 12 +++++++++++-
 3 files changed, 11 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h
index c6174a366095..c92a9508c8d3 100644
--- a/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h
+++ b/drivers/gpu/drm/msm/disp/msm_disp_snapshot.h
@@ -27,7 +27,6 @@
 #include <linux/devcoredump.h>
 #include <stdarg.h>
 #include "msm_kms.h"
-#include "dsi.h"
 
 #define MSM_DISP_SNAPSHOT_MAX_BLKS		10
 
diff --git a/drivers/gpu/drm/msm/dsi/dsi.h b/drivers/gpu/drm/msm/dsi/dsi.h
index cea73f9c4be9..9b8e9b07eced 100644
--- a/drivers/gpu/drm/msm/dsi/dsi.h
+++ b/drivers/gpu/drm/msm/dsi/dsi.h
@@ -91,8 +91,6 @@ static inline bool msm_dsi_device_connected(struct msm_dsi *msm_dsi)
 	return msm_dsi->panel || msm_dsi->external_bridge;
 }
 
-void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi);
-
 struct drm_encoder *msm_dsi_get_encoder(struct msm_dsi *msm_dsi);
 
 /* dsi host */
diff --git a/drivers/gpu/drm/msm/msm_drv.h b/drivers/gpu/drm/msm/msm_drv.h
index c33fc1293789..ba60bf6f124c 100644
--- a/drivers/gpu/drm/msm/msm_drv.h
+++ b/drivers/gpu/drm/msm/msm_drv.h
@@ -43,6 +43,7 @@ struct msm_gem_submit;
 struct msm_fence_context;
 struct msm_gem_address_space;
 struct msm_gem_vma;
+struct msm_disp_state;
 
 #define MAX_CRTCS      8
 #define MAX_PLANES     20
@@ -340,6 +341,8 @@ void __init msm_dsi_register(void);
 void __exit msm_dsi_unregister(void);
 int msm_dsi_modeset_init(struct msm_dsi *msm_dsi, struct drm_device *dev,
 			 struct drm_encoder *encoder);
+void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi);
+
 #else
 static inline void __init msm_dsi_register(void)
 {
@@ -353,6 +356,10 @@ static inline int msm_dsi_modeset_init(struct msm_dsi *msm_dsi,
 {
 	return -EINVAL;
 }
+static inline void msm_dsi_snapshot(struct msm_disp_state *disp_state, struct msm_dsi *msm_dsi)
+{
+}
+
 #endif
 
 #ifdef CONFIG_DRM_MSM_DP
@@ -367,7 +374,6 @@ void msm_dp_display_mode_set(struct msm_dp *dp, struct drm_encoder *encoder,
 				struct drm_display_mode *mode,
 				struct drm_display_mode *adjusted_mode);
 void msm_dp_irq_postinstall(struct msm_dp *dp_display);
-struct msm_disp_state;
 void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display);
 
 void msm_dp_debugfs_init(struct msm_dp *dp_display, struct drm_minor *minor);
@@ -412,6 +418,10 @@ static inline void msm_dp_irq_postinstall(struct msm_dp *dp_display)
 {
 }
 
+static inline void msm_dp_snapshot(struct msm_disp_state *disp_state, struct msm_dp *dp_display)
+{
+}
+
 static inline void msm_dp_debugfs_init(struct msm_dp *dp_display,
 		struct drm_minor *minor)
 {
-- 
2.30.2