From: Alex Deucher Date: Wed, 1 Oct 2014 15:26:50 +0000 (-0400) Subject: drm/radeon: add support for read reg query from radeon info ioctl X-Git-Url: https://git.stricted.de/?a=commitdiff_plain;h=4535cb9cefbc736b47bc1e7f8628065aba5ca0d7;p=GitHub%2Fmoto-9609%2Fandroid_kernel_motorola_exynos9610.git drm/radeon: add support for read reg query from radeon info ioctl This allows us to query certain registers from userspace for profiling and harvest configuration. E.g., it can be used by the GALLIUM_HUD for profiling the status of various gfx blocks. Tested-by: Marek Olšák Signed-off-by: Alex Deucher --- diff --git a/drivers/gpu/drm/radeon/radeon_kms.c b/drivers/gpu/drm/radeon/radeon_kms.c index cf7e54e9b0d1..7b2a7335cc5d 100644 --- a/drivers/gpu/drm/radeon/radeon_kms.c +++ b/drivers/gpu/drm/radeon/radeon_kms.c @@ -568,6 +568,14 @@ static int radeon_info_ioctl(struct drm_device *dev, void *data, struct drm_file else *value = rdev->pm.current_mclk / 100; break; + case RADEON_INFO_READ_REG: + if (copy_from_user(value, value_ptr, sizeof(uint32_t))) { + DRM_ERROR("copy_from_user %s:%u\n", __func__, __LINE__); + return -EFAULT; + } + if (radeon_get_allowed_info_register(rdev, *value, value)) + return -EINVAL; + break; default: DRM_DEBUG_KMS("Invalid request %d\n", info->request); return -EINVAL; diff --git a/include/uapi/drm/radeon_drm.h b/include/uapi/drm/radeon_drm.h index de7ee21efea2..871e73f99a4d 100644 --- a/include/uapi/drm/radeon_drm.h +++ b/include/uapi/drm/radeon_drm.h @@ -1037,6 +1037,7 @@ struct drm_radeon_cs { #define RADEON_INFO_CURRENT_GPU_TEMP 0x21 #define RADEON_INFO_CURRENT_GPU_SCLK 0x22 #define RADEON_INFO_CURRENT_GPU_MCLK 0x23 +#define RADEON_INFO_READ_REG 0x24 struct drm_radeon_info { uint32_t request;