drm/amdgpu: add new INFO IOCTL query for input power

Some chips provide both average and input power.  Previously
we just exposed average power, add a new query for input
power.

Example userspace:
https://github.com/Umio-Yasuno/libdrm-amdgpu-sys-rs/tree/input_powerReviewed-by: Yang Wang <kevinyang.wang@amd.com>
Signed-off-by: Alex Deucher <alexander.deucher@amd.com>

drivers/gpu/drm/amd/amdgpu/amdgpu_kms.c

@@ -1114,6 +1114,15 @@ int amdgpu_info_ioctl(struct drm_device *dev, void *data, struct drm_file *filp)
 			}
 			ui32 >>= 8;
 			break;
+		case AMDGPU_INFO_SENSOR_GPU_INPUT_POWER:
+			/* get input GPU power */
+			if (amdgpu_dpm_read_sensor(adev,
+						   AMDGPU_PP_SENSOR_GPU_INPUT_POWER,
+						   (void *)&ui32, &ui32_size)) {
+				return -EINVAL;
+			}
+			ui32 >>= 8;
+			break;
 		case AMDGPU_INFO_SENSOR_VDDNB:
 			/* get VDDNB in millivolts */
 			if (amdgpu_dpm_read_sensor(adev,

include/uapi/drm/amdgpu_drm.h

@@ -865,6 +865,8 @@ struct drm_amdgpu_cs_chunk_cp_gfx_shadow {
 	#define AMDGPU_INFO_SENSOR_PEAK_PSTATE_GFX_SCLK			0xa
 	/* Subquery id: Query GPU peak pstate memory clock */
 	#define AMDGPU_INFO_SENSOR_PEAK_PSTATE_GFX_MCLK			0xb
+	/* Subquery id: Query input GPU power	*/
+	#define AMDGPU_INFO_SENSOR_GPU_INPUT_POWER	0xc
 /* Number of VRAM page faults on CPU access. */
 #define AMDGPU_INFO_NUM_VRAM_CPU_PAGE_FAULTS	0x1E
 #define AMDGPU_INFO_VRAM_LOST_COUNTER		0x1F