FROMLIST: drm/msm: enable separate_gpu_kms by default

On targets with multiple display subsystems, such as SA8775P, the GPU
binds to the first display subsystem that probes. This implicit binding
prevents subsequent display subsystems from probing successfully,
breaking multi-display support.

Enable separate_gpu_kms by default to decouple GPU and display subsystem
probing. This allows each display subsystem to initialize independently,
ensuring that all display subsystems are probed.

Link: https://lore.kernel.org/all/20260223-seperate_gpu_kms-v1-1-e8231e7f1685@oss.qualcomm.com/
Signed-off-by: Mahadevan P <mahadevan.p@oss.qualcomm.com>
Signed-off-by: Yash Gupta <quic_ygupt@quicinc.com>

Author: Yash Gupta

drivers/gpu/drm/msm/msm_drv.c

@@ -54,7 +54,7 @@ static bool modeset = true;
 MODULE_PARM_DESC(modeset, "Use kernel modesetting [KMS] (1=on (default), 0=disable)");
 module_param(modeset, bool, 0600);
 
-static bool separate_gpu_kms;
+static bool separate_gpu_kms = true;
 MODULE_PARM_DESC(separate_gpu_drm, "Use separate DRM device for the GPU (0=single DRM device for both GPU and display (default), 1=two DRM devices)");
 module_param(separate_gpu_kms, bool, 0400);