Commit 3f179914 authored by Akhil P Oommen's avatar Akhil P Oommen Committed by Dmitry Baryshkov
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drm/msm/adreno: Add a modparam to skip GPU 



During bringup of a new GPU support, it is convenient to have knob to
quickly disable GPU, but keep the display support. This helps to
fallback to 'kms_swrast' in case of bootup issues due to GPU. Add a
modparam to support this.

Signed-off-by: default avatarAkhil P Oommen <akhilpo@oss.qualcomm.com>
Reviewed-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
Patchwork: https://patchwork.freedesktop.org/patch/672262/
Link: https://lore.kernel.org/r/20250902-assorted-sept-1-v1-3-f3ec9baed513@oss.qualcomm.com


Signed-off-by: default avatarDmitry Baryshkov <dmitry.baryshkov@oss.qualcomm.com>
parent f028bcaf

drivers/gpu/drm/msm/adreno/adreno_device.c

+13 −0
Original line number Diff line number Diff line
@@ -24,6 +24,10 @@ bool disable_acd; 
MODULE_PARM_DESC(disable_acd, "Forcefully disable GPU ACD");

module_param_unsafe(disable_acd, bool, 0400);



static bool skip_gpu;

MODULE_PARM_DESC(no_gpu, "Disable GPU driver register (0=enable GPU driver register (default), 1=skip GPU driver register");

module_param(skip_gpu, bool, 0400);



extern const struct adreno_gpulist a2xx_gpulist;

extern const struct adreno_gpulist a3xx_gpulist;

extern const struct adreno_gpulist a4xx_gpulist;
@@ -184,6 +188,9 @@ bool adreno_has_gpu(struct device_node *node) 
	uint32_t chip_id;

	int ret;



	if (skip_gpu)

		return false;



	ret = find_chipid(node, &chip_id);

	if (ret)

		return false;
@@ -404,10 +411,16 @@ static struct platform_driver adreno_driver = { 


void __init adreno_register(void)

{

	if (skip_gpu)

		return;



	platform_driver_register(&adreno_driver);

}



void __exit adreno_unregister(void)

{

	if (skip_gpu)

		return;



	platform_driver_unregister(&adreno_driver);

}