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Date:   Thu, 17 Jan 2019 18:20:06 +0200
From:   Stanimir Varbanov <stanimir.varbanov@...aro.org>
To:     linux-media@...r.kernel.org
Cc:     Mauro Carvalho Chehab <mchehab@...nel.org>,
        Hans Verkuil <hverkuil@...all.nl>,
        linux-kernel@...r.kernel.org, linux-arm-msm@...r.kernel.org,
        Vikash Garodia <vgarodia@...eaurora.org>,
        Tomasz Figa <tfiga@...omium.org>,
        Alexandre Courbot <acourbot@...omium.org>,
        Malathi Gottam <mgottam@...eaurora.org>,
        Stanimir Varbanov <stanimir.varbanov@...aro.org>
Subject: [PATCH 08/10] venus: vdec_ctrls: get real minimum buffers for capture

Until now we returned num_output_bufs set during reqbuf but
that could be wrong when we implement stateful Codec API. So
get the minimum buffers for capture from HFI. This is supposed
to be called after stream header parsing, i.e. after dequeue
v4l2 event for change resolution.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@...aro.org>
---
 drivers/media/platform/qcom/venus/vdec_ctrls.c | 7 ++++++-
 1 file changed, 6 insertions(+), 1 deletion(-)

diff --git a/drivers/media/platform/qcom/venus/vdec_ctrls.c b/drivers/media/platform/qcom/venus/vdec_ctrls.c
index f4604b0cd57e..e1da87bf52bc 100644
--- a/drivers/media/platform/qcom/venus/vdec_ctrls.c
+++ b/drivers/media/platform/qcom/venus/vdec_ctrls.c
@@ -16,6 +16,7 @@
 #include <media/v4l2-ctrls.h>
 
 #include "core.h"
+#include "helpers.h"
 #include "vdec.h"
 
 static int vdec_op_s_ctrl(struct v4l2_ctrl *ctrl)
@@ -47,7 +48,9 @@ static int vdec_op_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 {
 	struct venus_inst *inst = ctrl_to_inst(ctrl);
 	struct vdec_controls *ctr = &inst->controls.dec;
+	struct hfi_buffer_requirements bufreq;
 	union hfi_get_property hprop;
+	enum hfi_version ver = inst->core->res->hfi_version;
 	u32 ptype = HFI_PROPERTY_PARAM_PROFILE_LEVEL_CURRENT;
 	int ret;
 
@@ -71,7 +74,9 @@ static int vdec_op_g_volatile_ctrl(struct v4l2_ctrl *ctrl)
 		ctrl->val = ctr->post_loop_deb_mode;
 		break;
 	case V4L2_CID_MIN_BUFFERS_FOR_CAPTURE:
-		ctrl->val = inst->num_output_bufs;
+		ret = venus_helper_get_bufreq(inst, HFI_BUFFER_OUTPUT, &bufreq);
+		if (!ret)
+			ctrl->val = HFI_BUFREQ_COUNT_MIN(&bufreq, ver);
 		break;
 	default:
 		return -EINVAL;
-- 
2.17.1

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