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pan drm-shim: add a way to specify the GPU variant in PAN_GPU_ID

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This lets us compile shaders for different GPU variants on the PC.

Reviewed-by: Christoph Pillmayer <christoph.pillmayer@arm.com>
Part-of: <https://gitlab.freedesktop.org/mesa/mesa/-/merge_requests/38961>
This commit is contained in:
Eric R. Smith 2025-12-04 20:18:00 -04:00 • committed by Marge Bot
parent 036ec36cba
commit 2fdd6eb09e
1 changed files with 21 additions and 0 deletions
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21
src/panfrost/drm-shim/panfrost_noop.c
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@ -50,6 +50,23 @@ pan_get_gpu_id(void)
return PAN_GPU_ID_DEFAULT;
}
/*
* The gpu variant is specified as a hex value after the GPU id
* in PAN_GPU_ID, e.g. PAN_GPU_ID=ac04:4.
*/
static uint64_t
pan_get_gpu_variant(void)
{
const char *override_version = os_get_option("PAN_GPU_ID");
if (override_version) {
const char *sep = strchr(override_version, ':');
if (sep)
return strtol(sep+1, NULL, 16);
}
return 0;
}
static int
pan_ioctl_noop(int fd, unsigned long request, void *arg)
{
@ -170,6 +187,10 @@ panthor_ioctl_dev_query(int fd, unsigned long request, void *arg)
gpu_info->gpu_id = pan_get_gpu_id() << 16;
gpu_info->gpu_rev = 0;
/* for some reason the variant is in the bottom 8 bits of
* the core_features */
gpu_info->core_features = pan_get_gpu_variant();
/* Dumped from a G610 */
gpu_info->csf_id = 0x40a0412;
gpu_info->l2_features = 0x7120306;