media: venus: vdec: get required input buffers as well

Rework and rename vdec_cap_num_buffers() to get the number of
input buffers too.
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Reviewed-by: Tomasz Figa <tfiga@chromium.org>
Reviewed-by: Alexandre Courbot <acourbot@chromium.org>
Tested-by: Alexandre Courbot <acourbot@chromium.org>
Signed-off-by: Hans Verkuil <hans.verkuil@cisco.com>
Signed-off-by: Mauro Carvalho Chehab <mchehab+samsung@kernel.org>

drivers/media/platform/qcom/venus/vdec.c

@@ -601,19 +601,32 @@ static int vdec_init_session(struct venus_inst *inst)
 	return ret;
 }
 
-static int vdec_cap_num_buffers(struct venus_inst *inst, unsigned int *num)
+static int vdec_num_buffers(struct venus_inst *inst, unsigned int *in_num,
+			    unsigned int *out_num)
 {
+	enum hfi_version ver = inst->core->res->hfi_version;
 	struct hfi_buffer_requirements bufreq;
 	int ret;
 
+	*in_num = *out_num = 0;
+
 	ret = vdec_init_session(inst);
 	if (ret)
 		return ret;
 
+	ret = venus_helper_get_bufreq(inst, HFI_BUFFER_INPUT, &bufreq);
+	if (ret)
+		goto deinit;
+
+	*in_num = HFI_BUFREQ_COUNT_MIN(&bufreq, ver);
+
 	ret = venus_helper_get_bufreq(inst, HFI_BUFFER_OUTPUT, &bufreq);
+	if (ret)
+		goto deinit;
 
-	*num = bufreq.count_actual;
+	*out_num = HFI_BUFREQ_COUNT_MIN(&bufreq, ver);
 
+deinit:
 	hfi_session_deinit(inst);
 
 	return ret;
@@ -624,7 +637,7 @@ static int vdec_queue_setup(struct vb2_queue *q,
 			    unsigned int sizes[], struct device *alloc_devs[])
 {
 	struct venus_inst *inst = vb2_get_drv_priv(q);
-	unsigned int p, num;
+	unsigned int p, in_num, out_num;
 	int ret = 0;
 
 	if (*num_planes) {
@@ -647,35 +660,29 @@ static int vdec_queue_setup(struct vb2_queue *q,
 		return 0;
 	}
 
+	ret = vdec_num_buffers(inst, &in_num, &out_num);
+	if (ret)
+		return ret;
+
 	switch (q->type) {
 	case V4L2_BUF_TYPE_VIDEO_OUTPUT_MPLANE:
 		*num_planes = inst->fmt_out->num_planes;
 		sizes[0] = get_framesize_compressed(inst->out_width,
 						    inst->out_height);
 		inst->input_buf_size = sizes[0];
+		*num_buffers = max(*num_buffers, in_num);
 		inst->num_input_bufs = *num_buffers;
-
-		ret = vdec_cap_num_buffers(inst, &num);
-		if (ret)
-			break;
-
-		inst->num_output_bufs = num;
+		inst->num_output_bufs = out_num;
 		break;
 	case V4L2_BUF_TYPE_VIDEO_CAPTURE_MPLANE:
 		*num_planes = inst->fmt_cap->num_planes;
 
-		ret = vdec_cap_num_buffers(inst, &num);
-		if (ret)
-			break;
-
-		*num_buffers = max(*num_buffers, num);
-
 		for (p = 0; p < *num_planes; p++)
 			sizes[p] = get_framesize_uncompressed(p, inst->width,
 							      inst->height);
-
-		inst->num_output_bufs = *num_buffers;
 		inst->output_buf_size = sizes[0];
+		*num_buffers = max(*num_buffers, out_num);
+		inst->num_output_bufs = *num_buffers;
 		break;
 	default:
 		ret = -EINVAL;