[PATCH 0/4] MFC private ctrls to std ctrls

[PATCH 0/4] MFC private ctrls to std ctrls

[Stanimir Varbanov]

Hi,

Those four patches makes two V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY
and V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE private MFC controls
standard v4l2 controls, and use them in Venus driver.

Comments are welcome!

regards,
Stan

Stanimir Varbanov (4):
  v4l2-ctrl: Make display delay and display enable std controls
  venus: vdec: Add support for display delay and delay enable controls
  s5p-mfc: Use display delay and display enable std controls
  docs: Deprecate mfc display delay controls

 .../media/v4l/ext-ctrls-codec.rst             | 25 +++++++++++++++++++
 drivers/media/platform/qcom/venus/core.h      |  2 ++
 drivers/media/platform/qcom/venus/vdec.c      | 10 +++++++-
 .../media/platform/qcom/venus/vdec_ctrls.c    | 16 +++++++++++-
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c  | 16 ++++++++++++
 drivers/media/v4l2-core/v4l2-ctrls.c          |  4 +++
 include/uapi/linux/v4l2-controls.h            |  2 ++
 7 files changed, 73 insertions(+), 2 deletions(-)

-- 
2.17.1

[PATCH 0/4] MFC private ctrls to std ctrls

[Stanimir Varbanov]

Hi,

Those four patches makes two V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY
and V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE private MFC controls
standard v4l2 controls, and use them in Venus driver.

Comments are welcome!

regards,
Stan

Stanimir Varbanov (4):
  v4l2-ctrl: Make display delay and display enable std controls
  venus: vdec: Add support for display delay and delay enable controls
  s5p-mfc: Use display delay and display enable std controls
  docs: Deprecate mfc display delay controls

 .../media/v4l/ext-ctrls-codec.rst             | 25 +++++++++++++++++++
 drivers/media/platform/qcom/venus/core.h      |  2 ++
 drivers/media/platform/qcom/venus/vdec.c      | 10 +++++++-
 .../media/platform/qcom/venus/vdec_ctrls.c    | 16 +++++++++++-
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c  | 16 ++++++++++++
 drivers/media/v4l2-core/v4l2-ctrls.c          |  4 +++
 include/uapi/linux/v4l2-controls.h            |  2 ++
 7 files changed, 73 insertions(+), 2 deletions(-)

-- 
2.17.1


_______________________________________________
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linux-arm-kernel@lists.infradead.org
http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH 1/4] v4l2-ctrl: Make display delay and display enable std controls

[Stanimir Varbanov]

Make display delay and display delay enable MFC controls standard v4l
controls. This will allow reuse of the controls for other decoder
drivers. Also the new proposed controls are now codec agnostic because
they could be used for any codec.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
 .../userspace-api/media/v4l/ext-ctrls-codec.rst   | 15 +++++++++++++++
 drivers/media/v4l2-core/v4l2-ctrls.c              |  4 ++++
 include/uapi/linux/v4l2-controls.h                |  2 ++
 3 files changed, 21 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index ce728c757eaf..82c9cda40270 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -679,6 +679,21 @@ enum v4l2_mpeg_video_frame_skip_mode -
     otherwise the decoder expects a single frame in per buffer.
     Applicable to the decoder, all codecs.
 
+``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE (boolean)``
+    If the display delay is enabled then the decoder is forced to return
+    a CAPTURE buffer (decoded frame) after processing a certain number
+    of OUTPUT buffers. The delay can be set through
+    ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY``. This
+    feature can be used for example for generating thumbnails of videos.
+    Applicable to the decoder.
+
+``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY (integer)``
+    Display delay value for decoder. The decoder is forced to
+    return a decoded frame after the set 'display delay' number of
+    frames. If this number is low it may result in frames returned out
+    of display order, in addition the hardware may still be using the
+    returned buffer as a reference picture for subsequent frames.
+
 ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
     Enable writing sample aspect ratio in the Video Usability
     Information. Applicable to the H264 encoder.
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index bd7f330c941c..4a21802e026b 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -874,6 +874,8 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:			return "Sequence Header Mode";
 	case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC:			return "Max Number of Reference Pics";
 	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:		return "Frame Skip Mode";
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:		return "Display Delay";
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:	return "Display Delay Enable";
 	case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP:		return "H263 I-Frame QP Value";
 	case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP:		return "H263 P-Frame QP Value";
 	case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP:		return "H263 B-Frame QP Value";
@@ -1221,6 +1223,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_FLASH_READY:
 	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
 	case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
 	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
 	case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
 	case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
@@ -1256,6 +1259,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 		break;
 	case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
 	case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
 		*type = V4L2_CTRL_TYPE_INTEGER;
 		break;
 	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 7035f4fb182c..d6b19f8d0022 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -773,6 +773,8 @@ enum v4l2_mpeg_video_frame_skip_mode {
 	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT	= 1,
 	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT	= 2,
 };
+#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY		(V4L2_CID_MPEG_BASE + 647)
+#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE	(V4L2_CID_MPEG_BASE + 648)
 
 /*  MPEG-class control IDs specific to the CX2341x driver as defined by V4L2 */
 #define V4L2_CID_MPEG_CX2341X_BASE				(V4L2_CTRL_CLASS_MPEG | 0x1000)
-- 
2.17.1

[PATCH 1/4] v4l2-ctrl: Make display delay and display enable std controls

[Stanimir Varbanov]

Make display delay and display delay enable MFC controls standard v4l
controls. This will allow reuse of the controls for other decoder
drivers. Also the new proposed controls are now codec agnostic because
they could be used for any codec.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
 .../userspace-api/media/v4l/ext-ctrls-codec.rst   | 15 +++++++++++++++
 drivers/media/v4l2-core/v4l2-ctrls.c              |  4 ++++
 include/uapi/linux/v4l2-controls.h                |  2 ++
 3 files changed, 21 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index ce728c757eaf..82c9cda40270 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -679,6 +679,21 @@ enum v4l2_mpeg_video_frame_skip_mode -
     otherwise the decoder expects a single frame in per buffer.
     Applicable to the decoder, all codecs.
 
+``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE (boolean)``
+    If the display delay is enabled then the decoder is forced to return
+    a CAPTURE buffer (decoded frame) after processing a certain number
+    of OUTPUT buffers. The delay can be set through
+    ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY``. This
+    feature can be used for example for generating thumbnails of videos.
+    Applicable to the decoder.
+
+``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY (integer)``
+    Display delay value for decoder. The decoder is forced to
+    return a decoded frame after the set 'display delay' number of
+    frames. If this number is low it may result in frames returned out
+    of display order, in addition the hardware may still be using the
+    returned buffer as a reference picture for subsequent frames.
+
 ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
     Enable writing sample aspect ratio in the Video Usability
     Information. Applicable to the H264 encoder.
diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
index bd7f330c941c..4a21802e026b 100644
--- a/drivers/media/v4l2-core/v4l2-ctrls.c
+++ b/drivers/media/v4l2-core/v4l2-ctrls.c
@@ -874,6 +874,8 @@ const char *v4l2_ctrl_get_name(u32 id)
 	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:			return "Sequence Header Mode";
 	case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC:			return "Max Number of Reference Pics";
 	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:		return "Frame Skip Mode";
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:		return "Display Delay";
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:	return "Display Delay Enable";
 	case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP:		return "H263 I-Frame QP Value";
 	case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP:		return "H263 P-Frame QP Value";
 	case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP:		return "H263 B-Frame QP Value";
@@ -1221,6 +1223,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 	case V4L2_CID_FLASH_READY:
 	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
 	case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
 	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
 	case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
 	case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
@@ -1256,6 +1259,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
 		break;
 	case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
 	case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
 		*type = V4L2_CTRL_TYPE_INTEGER;
 		break;
 	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
index 7035f4fb182c..d6b19f8d0022 100644
--- a/include/uapi/linux/v4l2-controls.h
+++ b/include/uapi/linux/v4l2-controls.h
@@ -773,6 +773,8 @@ enum v4l2_mpeg_video_frame_skip_mode {
 	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT	= 1,
 	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT	= 2,
 };
+#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY		(V4L2_CID_MPEG_BASE + 647)
+#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE	(V4L2_CID_MPEG_BASE + 648)
 
 /*  MPEG-class control IDs specific to the CX2341x driver as defined by V4L2 */
 #define V4L2_CID_MPEG_CX2341X_BASE				(V4L2_CTRL_CLASS_MPEG | 0x1000)
-- 
2.17.1


_______________________________________________
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http://lists.infradead.org/mailman/listinfo/linux-arm-kernel

[PATCH 2/4] venus: vdec: Add support for display delay and delay enable controls

[Stanimir Varbanov]

Add support for display delay and display delay enable std controls.
With this we implement decoder decode output order (decode vs display).
Once firmware implement few new features the controls will be used
for other use-cases.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
 drivers/media/platform/qcom/venus/core.h       |  2 ++
 drivers/media/platform/qcom/venus/vdec.c       | 10 +++++++++-
 drivers/media/platform/qcom/venus/vdec_ctrls.c | 16 +++++++++++++++-
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 7b79a33dc9d6..a57fb6f70e61 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -210,6 +210,8 @@ struct vdec_controls {
 	u32 post_loop_deb_mode;
 	u32 profile;
 	u32 level;
+	u32 display_delay;
+	u32 display_delay_enable;
 };
 
 struct venc_controls {
diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index ea13170a6a2c..1b3b819ccc83 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -615,7 +615,7 @@ static int vdec_set_properties(struct venus_inst *inst)
 {
 	struct vdec_controls *ctr = &inst->controls.dec;
 	struct hfi_enable en = { .enable = 1 };
-	u32 ptype;
+	u32 ptype, decode_order;
 	int ret;
 
 	if (ctr->post_loop_deb_mode) {
@@ -625,6 +625,14 @@ static int vdec_set_properties(struct venus_inst *inst)
 			return ret;
 	}
 
+	if (ctr->display_delay_enable && ctr->display_delay == 0) {
+		ptype = HFI_PROPERTY_PARAM_VDEC_OUTPUT_ORDER;
+		decode_order = HFI_OUTPUT_ORDER_DECODE;
+		ret = hfi_session_set_property(inst, ptype, &decode_order);
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/media/platform/qcom/venus/vdec_ctrls.c b/drivers/media/platform/qcom/venus/vdec_ctrls.c
index 974110b75b93..e1378532dec8 100644
--- a/drivers/media/platform/qcom/venus/vdec_ctrls.c
+++ b/drivers/media/platform/qcom/venus/vdec_ctrls.c
@@ -30,6 +30,12 @@ static int vdec_op_s_ctrl(struct v4l2_ctrl *ctrl)
 	case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
 		ctr->level = ctrl->val;
 		break;
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
+		ctr->display_delay = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
+		ctr->display_delay_enable = ctrl->val;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -89,7 +95,7 @@ int vdec_ctrl_init(struct venus_inst *inst)
 	struct v4l2_ctrl *ctrl;
 	int ret;
 
-	ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 9);
+	ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 11);
 	if (ret)
 		return ret;
 
@@ -158,6 +164,14 @@ int vdec_ctrl_init(struct venus_inst *inst)
 	if (ctrl)
 		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
 
+	v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY,
+			  0, 16383, 1, 0);
+
+	v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE,
+			  0, 1, 1, 0);
+
 	ret = inst->ctrl_handler.error;
 	if (ret) {
 		v4l2_ctrl_handler_free(&inst->ctrl_handler);
-- 
2.17.1

[PATCH 2/4] venus: vdec: Add support for display delay and delay enable controls

[Stanimir Varbanov]

Add support for display delay and display delay enable std controls.
With this we implement decoder decode output order (decode vs display).
Once firmware implement few new features the controls will be used
for other use-cases.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
 drivers/media/platform/qcom/venus/core.h       |  2 ++
 drivers/media/platform/qcom/venus/vdec.c       | 10 +++++++++-
 drivers/media/platform/qcom/venus/vdec_ctrls.c | 16 +++++++++++++++-
 3 files changed, 26 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/venus/core.h b/drivers/media/platform/qcom/venus/core.h
index 7b79a33dc9d6..a57fb6f70e61 100644
--- a/drivers/media/platform/qcom/venus/core.h
+++ b/drivers/media/platform/qcom/venus/core.h
@@ -210,6 +210,8 @@ struct vdec_controls {
 	u32 post_loop_deb_mode;
 	u32 profile;
 	u32 level;
+	u32 display_delay;
+	u32 display_delay_enable;
 };
 
 struct venc_controls {
diff --git a/drivers/media/platform/qcom/venus/vdec.c b/drivers/media/platform/qcom/venus/vdec.c
index ea13170a6a2c..1b3b819ccc83 100644
--- a/drivers/media/platform/qcom/venus/vdec.c
+++ b/drivers/media/platform/qcom/venus/vdec.c
@@ -615,7 +615,7 @@ static int vdec_set_properties(struct venus_inst *inst)
 {
 	struct vdec_controls *ctr = &inst->controls.dec;
 	struct hfi_enable en = { .enable = 1 };
-	u32 ptype;
+	u32 ptype, decode_order;
 	int ret;
 
 	if (ctr->post_loop_deb_mode) {
@@ -625,6 +625,14 @@ static int vdec_set_properties(struct venus_inst *inst)
 			return ret;
 	}
 
+	if (ctr->display_delay_enable && ctr->display_delay == 0) {
+		ptype = HFI_PROPERTY_PARAM_VDEC_OUTPUT_ORDER;
+		decode_order = HFI_OUTPUT_ORDER_DECODE;
+		ret = hfi_session_set_property(inst, ptype, &decode_order);
+		if (ret)
+			return ret;
+	}
+
 	return 0;
 }
 
diff --git a/drivers/media/platform/qcom/venus/vdec_ctrls.c b/drivers/media/platform/qcom/venus/vdec_ctrls.c
index 974110b75b93..e1378532dec8 100644
--- a/drivers/media/platform/qcom/venus/vdec_ctrls.c
+++ b/drivers/media/platform/qcom/venus/vdec_ctrls.c
@@ -30,6 +30,12 @@ static int vdec_op_s_ctrl(struct v4l2_ctrl *ctrl)
 	case V4L2_CID_MPEG_VIDEO_VP9_LEVEL:
 		ctr->level = ctrl->val;
 		break;
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
+		ctr->display_delay = ctrl->val;
+		break;
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
+		ctr->display_delay_enable = ctrl->val;
+		break;
 	default:
 		return -EINVAL;
 	}
@@ -89,7 +95,7 @@ int vdec_ctrl_init(struct venus_inst *inst)
 	struct v4l2_ctrl *ctrl;
 	int ret;
 
-	ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 9);
+	ret = v4l2_ctrl_handler_init(&inst->ctrl_handler, 11);
 	if (ret)
 		return ret;
 
@@ -158,6 +164,14 @@ int vdec_ctrl_init(struct venus_inst *inst)
 	if (ctrl)
 		ctrl->flags |= V4L2_CTRL_FLAG_VOLATILE;
 
+	v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY,
+			  0, 16383, 1, 0);
+
+	v4l2_ctrl_new_std(&inst->ctrl_handler, &vdec_ctrl_ops,
+			  V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE,
+			  0, 1, 1, 0);
+
 	ret = inst->ctrl_handler.error;
 	if (ret) {
 		v4l2_ctrl_handler_free(&inst->ctrl_handler);
-- 
2.17.1


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[PATCH 3/4] s5p-mfc: Use display delay and display enable std controls

[Stanimir Varbanov]

Use the standard display_delay and display_delay_enable controls,
the legacy private MFC controls are kept for backward compatibility.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index 61e144a35201..4a3e8e9bbff2 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -167,6 +167,13 @@ static struct mfc_control controls[] = {
 		.step = 1,
 		.default_value = 0,
 	},
+	{
+		.id = V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY,
+		.type = V4L2_CTRL_TYPE_INTEGER,
+		.minimum = 0,
+		.maximum = 16383,
+		.default_value = 0,
+	},
 	{
 		.id = V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE,
 		.type = V4L2_CTRL_TYPE_BOOLEAN,
@@ -176,6 +183,13 @@ static struct mfc_control controls[] = {
 		.step = 1,
 		.default_value = 0,
 	},
+	{
+		.id = V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE,
+		.type = V4L2_CTRL_TYPE_BOOLEAN,
+		.minimum = 0,
+		.maximum = 1,
+		.default_value = 0,
+	},
 	{
 		.id = V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER,
 		.type = V4L2_CTRL_TYPE_BOOLEAN,
@@ -690,9 +704,11 @@ static int s5p_mfc_dec_s_ctrl(struct v4l2_ctrl *ctrl)
 
 	switch (ctrl->id) {
 	case V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY:
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
 		ctx->display_delay = ctrl->val;
 		break;
 	case V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE:
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
 		ctx->display_delay_enable = ctrl->val;
 		break;
 	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
-- 
2.17.1

[PATCH 3/4] s5p-mfc: Use display delay and display enable std controls

[Stanimir Varbanov]

Use the standard display_delay and display_delay_enable controls,
the legacy private MFC controls are kept for backward compatibility.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
 drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 16 ++++++++++++++++
 1 file changed, 16 insertions(+)

diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
index 61e144a35201..4a3e8e9bbff2 100644
--- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
+++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
@@ -167,6 +167,13 @@ static struct mfc_control controls[] = {
 		.step = 1,
 		.default_value = 0,
 	},
+	{
+		.id = V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY,
+		.type = V4L2_CTRL_TYPE_INTEGER,
+		.minimum = 0,
+		.maximum = 16383,
+		.default_value = 0,
+	},
 	{
 		.id = V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE,
 		.type = V4L2_CTRL_TYPE_BOOLEAN,
@@ -176,6 +183,13 @@ static struct mfc_control controls[] = {
 		.step = 1,
 		.default_value = 0,
 	},
+	{
+		.id = V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE,
+		.type = V4L2_CTRL_TYPE_BOOLEAN,
+		.minimum = 0,
+		.maximum = 1,
+		.default_value = 0,
+	},
 	{
 		.id = V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER,
 		.type = V4L2_CTRL_TYPE_BOOLEAN,
@@ -690,9 +704,11 @@ static int s5p_mfc_dec_s_ctrl(struct v4l2_ctrl *ctrl)
 
 	switch (ctrl->id) {
 	case V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY:
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
 		ctx->display_delay = ctrl->val;
 		break;
 	case V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE:
+	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
 		ctx->display_delay_enable = ctrl->val;
 		break;
 	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
-- 
2.17.1


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[PATCH 4/4] docs: Deprecate mfc display delay controls

[Stanimir Varbanov]

Deprecate mfc private display delay and display enable controls for
new clients and use the standard controls instead.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
 .../userspace-api/media/v4l/ext-ctrls-codec.rst        | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 82c9cda40270..b8f69c52b2a2 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -2771,6 +2771,11 @@ MFC 5.1 Control IDs
     feature can be used for example for generating thumbnails of videos.
     Applicable to the H264 decoder.
 
+    .. note::
+
+       This control is deprecated. Use the standard
+       ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE`` control instead.
+
 ``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY (integer)``
     Display delay value for H264 decoder. The decoder is forced to
     return a decoded frame after the set 'display delay' number of
@@ -2778,6 +2783,11 @@ MFC 5.1 Control IDs
     of display order, in addition the hardware may still be using the
     returned buffer as a reference picture for subsequent frames.
 
+    .. note::
+
+       This control is deprecated. Use the standard
+       ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY`` control instead.
+
 ``V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P (integer)``
     The number of reference pictures used for encoding a P picture.
     Applicable to the H264 encoder.
-- 
2.17.1

[PATCH 4/4] docs: Deprecate mfc display delay controls

[Stanimir Varbanov]

Deprecate mfc private display delay and display enable controls for
new clients and use the standard controls instead.

Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
---
 .../userspace-api/media/v4l/ext-ctrls-codec.rst        | 10 ++++++++++
 1 file changed, 10 insertions(+)

diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
index 82c9cda40270..b8f69c52b2a2 100644
--- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
+++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
@@ -2771,6 +2771,11 @@ MFC 5.1 Control IDs
     feature can be used for example for generating thumbnails of videos.
     Applicable to the H264 decoder.
 
+    .. note::
+
+       This control is deprecated. Use the standard
+       ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE`` control instead.
+
 ``V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY (integer)``
     Display delay value for H264 decoder. The decoder is forced to
     return a decoded frame after the set 'display delay' number of
@@ -2778,6 +2783,11 @@ MFC 5.1 Control IDs
     of display order, in addition the hardware may still be using the
     returned buffer as a reference picture for subsequent frames.
 
+    .. note::
+
+       This control is deprecated. Use the standard
+       ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY`` control instead.
+
 ``V4L2_CID_MPEG_MFC51_VIDEO_H264_NUM_REF_PIC_FOR_P (integer)``
     The number of reference pictures used for encoding a P picture.
     Applicable to the H264 encoder.
-- 
2.17.1


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Re: [PATCH 3/4] s5p-mfc: Use display delay and display enable std controls

[Marek Szyprowski]

On 09.11.2020 18:35, Stanimir Varbanov wrote:
> Use the standard display_delay and display_delay_enable controls,
> the legacy private MFC controls are kept for backward compatibility.
>
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 16 ++++++++++++++++
>   1 file changed, 16 insertions(+)
>
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> index 61e144a35201..4a3e8e9bbff2 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> @@ -167,6 +167,13 @@ static struct mfc_control controls[] = {
>   		.step = 1,
>   		.default_value = 0,
>   	},
> +	{
> +		.id = V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY,
> +		.type = V4L2_CTRL_TYPE_INTEGER,
> +		.minimum = 0,
> +		.maximum = 16383,
> +		.default_value = 0,
> +	},
>   	{
>   		.id = V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE,
>   		.type = V4L2_CTRL_TYPE_BOOLEAN,
> @@ -176,6 +183,13 @@ static struct mfc_control controls[] = {
>   		.step = 1,
>   		.default_value = 0,
>   	},
> +	{
> +		.id = V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE,
> +		.type = V4L2_CTRL_TYPE_BOOLEAN,
> +		.minimum = 0,
> +		.maximum = 1,
> +		.default_value = 0,
> +	},
>   	{
>   		.id = V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER,
>   		.type = V4L2_CTRL_TYPE_BOOLEAN,
> @@ -690,9 +704,11 @@ static int s5p_mfc_dec_s_ctrl(struct v4l2_ctrl *ctrl)
>   
>   	switch (ctrl->id) {
>   	case V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY:
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
>   		ctx->display_delay = ctrl->val;
>   		break;
>   	case V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE:
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
>   		ctx->display_delay_enable = ctrl->val;
>   		break;
>   	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland

Re: [PATCH 3/4] s5p-mfc: Use display delay and display enable std controls

[Marek Szyprowski]

On 09.11.2020 18:35, Stanimir Varbanov wrote:
> Use the standard display_delay and display_delay_enable controls,
> the legacy private MFC controls are kept for backward compatibility.
>
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Acked-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>   drivers/media/platform/s5p-mfc/s5p_mfc_dec.c | 16 ++++++++++++++++
>   1 file changed, 16 insertions(+)
>
> diff --git a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> index 61e144a35201..4a3e8e9bbff2 100644
> --- a/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> +++ b/drivers/media/platform/s5p-mfc/s5p_mfc_dec.c
> @@ -167,6 +167,13 @@ static struct mfc_control controls[] = {
>   		.step = 1,
>   		.default_value = 0,
>   	},
> +	{
> +		.id = V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY,
> +		.type = V4L2_CTRL_TYPE_INTEGER,
> +		.minimum = 0,
> +		.maximum = 16383,
> +		.default_value = 0,
> +	},
>   	{
>   		.id = V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE,
>   		.type = V4L2_CTRL_TYPE_BOOLEAN,
> @@ -176,6 +183,13 @@ static struct mfc_control controls[] = {
>   		.step = 1,
>   		.default_value = 0,
>   	},
> +	{
> +		.id = V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE,
> +		.type = V4L2_CTRL_TYPE_BOOLEAN,
> +		.minimum = 0,
> +		.maximum = 1,
> +		.default_value = 0,
> +	},
>   	{
>   		.id = V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER,
>   		.type = V4L2_CTRL_TYPE_BOOLEAN,
> @@ -690,9 +704,11 @@ static int s5p_mfc_dec_s_ctrl(struct v4l2_ctrl *ctrl)
>   
>   	switch (ctrl->id) {
>   	case V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY:
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
>   		ctx->display_delay = ctrl->val;
>   		break;
>   	case V4L2_CID_MPEG_MFC51_VIDEO_DECODER_H264_DISPLAY_DELAY_ENABLE:
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
>   		ctx->display_delay_enable = ctrl->val;
>   		break;
>   	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:

Best regards
-- 
Marek Szyprowski, PhD
Samsung R&D Institute Poland


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Re: [PATCH 1/4] v4l2-ctrl: Make display delay and display enable std controls

[Hans Verkuil]

On 09/11/2020 18:35, Stanimir Varbanov wrote:
> Make display delay and display delay enable MFC controls standard v4l
> controls. This will allow reuse of the controls for other decoder
> drivers. Also the new proposed controls are now codec agnostic because
> they could be used for any codec.
> 
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
> ---
>  .../userspace-api/media/v4l/ext-ctrls-codec.rst   | 15 +++++++++++++++
>  drivers/media/v4l2-core/v4l2-ctrls.c              |  4 ++++
>  include/uapi/linux/v4l2-controls.h                |  2 ++
>  3 files changed, 21 insertions(+)
> 
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> index ce728c757eaf..82c9cda40270 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> @@ -679,6 +679,21 @@ enum v4l2_mpeg_video_frame_skip_mode -
>      otherwise the decoder expects a single frame in per buffer.
>      Applicable to the decoder, all codecs.
>  
> +``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE (boolean)``

I'd use _DEC_ instead of _DECODER_.

> +    If the display delay is enabled then the decoder is forced to return
> +    a CAPTURE buffer (decoded frame) after processing a certain number
> +    of OUTPUT buffers. The delay can be set through
> +    ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY``. This
> +    feature can be used for example for generating thumbnails of videos.
> +    Applicable to the decoder.

Hmm. Is this: "after processing the first 'display delay' number of OUTPUT buffers."
Or is this: "every 'display delay' number of OUTPUT buffers."

I.e., is it a one-shot thing or a periodical thing?

If it is a one-shot thing, then this should probably be a button type, not
a boolean.

> +
> +``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY (integer)``
> +    Display delay value for decoder. The decoder is forced to
> +    return a decoded frame after the set 'display delay' number of
> +    frames. If this number is low it may result in frames returned out
> +    of display order, in addition the hardware may still be using the
> +    returned buffer as a reference picture for subsequent frames.

Can this be 0? And if so, what does that mean?

> +
>  ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
>      Enable writing sample aspect ratio in the Video Usability
>      Information. Applicable to the H264 encoder.
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index bd7f330c941c..4a21802e026b 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -874,6 +874,8 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:			return "Sequence Header Mode";
>  	case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC:			return "Max Number of Reference Pics";
>  	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:		return "Frame Skip Mode";
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:		return "Display Delay";
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:	return "Display Delay Enable";
>  	case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP:		return "H263 I-Frame QP Value";
>  	case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP:		return "H263 P-Frame QP Value";
>  	case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP:		return "H263 B-Frame QP Value";
> @@ -1221,6 +1223,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  	case V4L2_CID_FLASH_READY:
>  	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
>  	case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
>  	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
>  	case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
>  	case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
> @@ -1256,6 +1259,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  		break;
>  	case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
>  	case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
>  		*type = V4L2_CTRL_TYPE_INTEGER;
>  		break;
>  	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index 7035f4fb182c..d6b19f8d0022 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -773,6 +773,8 @@ enum v4l2_mpeg_video_frame_skip_mode {
>  	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT	= 1,
>  	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT	= 2,
>  };
> +#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY		(V4L2_CID_MPEG_BASE + 647)
> +#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE	(V4L2_CID_MPEG_BASE + 648)

This will need to be rebased once this PR is merged:
https://patchwork.linuxtv.org/project/linux-media/patch/d68da172-b251-000f-653d-38a8a4c7b715@xs4all.nl/

>  
>  /*  MPEG-class control IDs specific to the CX2341x driver as defined by V4L2 */
>  #define V4L2_CID_MPEG_CX2341X_BASE				(V4L2_CTRL_CLASS_MPEG | 0x1000)
> 

Regards,

	Hans

Re: [PATCH 1/4] v4l2-ctrl: Make display delay and display enable std controls

[Hans Verkuil]

On 09/11/2020 18:35, Stanimir Varbanov wrote:
> Make display delay and display delay enable MFC controls standard v4l
> controls. This will allow reuse of the controls for other decoder
> drivers. Also the new proposed controls are now codec agnostic because
> they could be used for any codec.
> 
> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
> ---
>  .../userspace-api/media/v4l/ext-ctrls-codec.rst   | 15 +++++++++++++++
>  drivers/media/v4l2-core/v4l2-ctrls.c              |  4 ++++
>  include/uapi/linux/v4l2-controls.h                |  2 ++
>  3 files changed, 21 insertions(+)
> 
> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> index ce728c757eaf..82c9cda40270 100644
> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
> @@ -679,6 +679,21 @@ enum v4l2_mpeg_video_frame_skip_mode -
>      otherwise the decoder expects a single frame in per buffer.
>      Applicable to the decoder, all codecs.
>  
> +``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE (boolean)``

I'd use _DEC_ instead of _DECODER_.

> +    If the display delay is enabled then the decoder is forced to return
> +    a CAPTURE buffer (decoded frame) after processing a certain number
> +    of OUTPUT buffers. The delay can be set through
> +    ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY``. This
> +    feature can be used for example for generating thumbnails of videos.
> +    Applicable to the decoder.

Hmm. Is this: "after processing the first 'display delay' number of OUTPUT buffers."
Or is this: "every 'display delay' number of OUTPUT buffers."

I.e., is it a one-shot thing or a periodical thing?

If it is a one-shot thing, then this should probably be a button type, not
a boolean.

> +
> +``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY (integer)``
> +    Display delay value for decoder. The decoder is forced to
> +    return a decoded frame after the set 'display delay' number of
> +    frames. If this number is low it may result in frames returned out
> +    of display order, in addition the hardware may still be using the
> +    returned buffer as a reference picture for subsequent frames.

Can this be 0? And if so, what does that mean?

> +
>  ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
>      Enable writing sample aspect ratio in the Video Usability
>      Information. Applicable to the H264 encoder.
> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
> index bd7f330c941c..4a21802e026b 100644
> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
> @@ -874,6 +874,8 @@ const char *v4l2_ctrl_get_name(u32 id)
>  	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:			return "Sequence Header Mode";
>  	case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC:			return "Max Number of Reference Pics";
>  	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:		return "Frame Skip Mode";
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:		return "Display Delay";
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:	return "Display Delay Enable";
>  	case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP:		return "H263 I-Frame QP Value";
>  	case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP:		return "H263 P-Frame QP Value";
>  	case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP:		return "H263 B-Frame QP Value";
> @@ -1221,6 +1223,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  	case V4L2_CID_FLASH_READY:
>  	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
>  	case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
>  	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
>  	case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
>  	case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
> @@ -1256,6 +1259,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>  		break;
>  	case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
>  	case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
>  		*type = V4L2_CTRL_TYPE_INTEGER;
>  		break;
>  	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
> index 7035f4fb182c..d6b19f8d0022 100644
> --- a/include/uapi/linux/v4l2-controls.h
> +++ b/include/uapi/linux/v4l2-controls.h
> @@ -773,6 +773,8 @@ enum v4l2_mpeg_video_frame_skip_mode {
>  	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT	= 1,
>  	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT	= 2,
>  };
> +#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY		(V4L2_CID_MPEG_BASE + 647)
> +#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE	(V4L2_CID_MPEG_BASE + 648)

This will need to be rebased once this PR is merged:
https://patchwork.linuxtv.org/project/linux-media/patch/d68da172-b251-000f-653d-38a8a4c7b715@xs4all.nl/

>  
>  /*  MPEG-class control IDs specific to the CX2341x driver as defined by V4L2 */
>  #define V4L2_CID_MPEG_CX2341X_BASE				(V4L2_CTRL_CLASS_MPEG | 0x1000)
> 

Regards,

	Hans

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Re: [PATCH 1/4] v4l2-ctrl: Make display delay and display enable std controls

[Stanimir Varbanov]

On 12/2/20 4:09 PM, Hans Verkuil wrote:
> On 09/11/2020 18:35, Stanimir Varbanov wrote:
>> Make display delay and display delay enable MFC controls standard v4l
>> controls. This will allow reuse of the controls for other decoder
>> drivers. Also the new proposed controls are now codec agnostic because
>> they could be used for any codec.
>>
>> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
>> ---
>>  .../userspace-api/media/v4l/ext-ctrls-codec.rst   | 15 +++++++++++++++
>>  drivers/media/v4l2-core/v4l2-ctrls.c              |  4 ++++
>>  include/uapi/linux/v4l2-controls.h                |  2 ++
>>  3 files changed, 21 insertions(+)
>>
>> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>> index ce728c757eaf..82c9cda40270 100644
>> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>> @@ -679,6 +679,21 @@ enum v4l2_mpeg_video_frame_skip_mode -
>>      otherwise the decoder expects a single frame in per buffer.
>>      Applicable to the decoder, all codecs.
>>  
>> +``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE (boolean)``
> 
> I'd use _DEC_ instead of _DECODER_.

OK.

> 
>> +    If the display delay is enabled then the decoder is forced to return
>> +    a CAPTURE buffer (decoded frame) after processing a certain number
>> +    of OUTPUT buffers. The delay can be set through
>> +    ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY``. This
>> +    feature can be used for example for generating thumbnails of videos.
>> +    Applicable to the decoder.
> 
> Hmm. Is this: "after processing the first 'display delay' number of OUTPUT buffers."
> Or is this: "every 'display delay' number of OUTPUT buffers."
> 
> I.e., is it a one-shot thing or a periodical thing?

It is periodical.

> 
> If it is a one-shot thing, then this should probably be a button type, not
> a boolean.
> 
>> +
>> +``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY (integer)``
>> +    Display delay value for decoder. The decoder is forced to
>> +    return a decoded frame after the set 'display delay' number of
>> +    frames. If this number is low it may result in frames returned out
>> +    of display order, in addition the hardware may still be using the
>> +    returned buffer as a reference picture for subsequent frames.
> 
> Can this be 0? And if so, what does that mean?

Yes, it can be 0 and I'm using this to change decoder decode order in
Venus driver:

V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY ctl->val = 0
V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE ctl->val = true

Then the decoder will produce output buffers in decode-order instead of
default display-order.

> 
>> +
>>  ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
>>      Enable writing sample aspect ratio in the Video Usability
>>      Information. Applicable to the H264 encoder.
>> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
>> index bd7f330c941c..4a21802e026b 100644
>> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
>> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
>> @@ -874,6 +874,8 @@ const char *v4l2_ctrl_get_name(u32 id)
>>  	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:			return "Sequence Header Mode";
>>  	case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC:			return "Max Number of Reference Pics";
>>  	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:		return "Frame Skip Mode";
>> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:		return "Display Delay";
>> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:	return "Display Delay Enable";
>>  	case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP:		return "H263 I-Frame QP Value";
>>  	case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP:		return "H263 P-Frame QP Value";
>>  	case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP:		return "H263 B-Frame QP Value";
>> @@ -1221,6 +1223,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>>  	case V4L2_CID_FLASH_READY:
>>  	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
>>  	case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
>> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
>>  	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
>>  	case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
>>  	case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
>> @@ -1256,6 +1259,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>>  		break;
>>  	case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
>>  	case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
>> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
>>  		*type = V4L2_CTRL_TYPE_INTEGER;
>>  		break;
>>  	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
>> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
>> index 7035f4fb182c..d6b19f8d0022 100644
>> --- a/include/uapi/linux/v4l2-controls.h
>> +++ b/include/uapi/linux/v4l2-controls.h
>> @@ -773,6 +773,8 @@ enum v4l2_mpeg_video_frame_skip_mode {
>>  	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT	= 1,
>>  	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT	= 2,
>>  };
>> +#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY		(V4L2_CID_MPEG_BASE + 647)
>> +#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE	(V4L2_CID_MPEG_BASE + 648)
> 
> This will need to be rebased once this PR is merged:
> https://patchwork.linuxtv.org/project/linux-media/patch/d68da172-b251-000f-653d-38a8a4c7b715@xs4all.nl/
> 
>>  
>>  /*  MPEG-class control IDs specific to the CX2341x driver as defined by V4L2 */
>>  #define V4L2_CID_MPEG_CX2341X_BASE				(V4L2_CTRL_CLASS_MPEG | 0x1000)
>>
> 
> Regards,
> 
> 	Hans
> 

-- 
regards,
Stan

Re: [PATCH 1/4] v4l2-ctrl: Make display delay and display enable std controls

[Stanimir Varbanov]

On 12/2/20 4:09 PM, Hans Verkuil wrote:
> On 09/11/2020 18:35, Stanimir Varbanov wrote:
>> Make display delay and display delay enable MFC controls standard v4l
>> controls. This will allow reuse of the controls for other decoder
>> drivers. Also the new proposed controls are now codec agnostic because
>> they could be used for any codec.
>>
>> Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
>> ---
>>  .../userspace-api/media/v4l/ext-ctrls-codec.rst   | 15 +++++++++++++++
>>  drivers/media/v4l2-core/v4l2-ctrls.c              |  4 ++++
>>  include/uapi/linux/v4l2-controls.h                |  2 ++
>>  3 files changed, 21 insertions(+)
>>
>> diff --git a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>> index ce728c757eaf..82c9cda40270 100644
>> --- a/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>> +++ b/Documentation/userspace-api/media/v4l/ext-ctrls-codec.rst
>> @@ -679,6 +679,21 @@ enum v4l2_mpeg_video_frame_skip_mode -
>>      otherwise the decoder expects a single frame in per buffer.
>>      Applicable to the decoder, all codecs.
>>  
>> +``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE (boolean)``
> 
> I'd use _DEC_ instead of _DECODER_.

OK.

> 
>> +    If the display delay is enabled then the decoder is forced to return
>> +    a CAPTURE buffer (decoded frame) after processing a certain number
>> +    of OUTPUT buffers. The delay can be set through
>> +    ``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY``. This
>> +    feature can be used for example for generating thumbnails of videos.
>> +    Applicable to the decoder.
> 
> Hmm. Is this: "after processing the first 'display delay' number of OUTPUT buffers."
> Or is this: "every 'display delay' number of OUTPUT buffers."
> 
> I.e., is it a one-shot thing or a periodical thing?

It is periodical.

> 
> If it is a one-shot thing, then this should probably be a button type, not
> a boolean.
> 
>> +
>> +``V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY (integer)``
>> +    Display delay value for decoder. The decoder is forced to
>> +    return a decoded frame after the set 'display delay' number of
>> +    frames. If this number is low it may result in frames returned out
>> +    of display order, in addition the hardware may still be using the
>> +    returned buffer as a reference picture for subsequent frames.
> 
> Can this be 0? And if so, what does that mean?

Yes, it can be 0 and I'm using this to change decoder decode order in
Venus driver:

V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY ctl->val = 0
V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE ctl->val = true

Then the decoder will produce output buffers in decode-order instead of
default display-order.

> 
>> +
>>  ``V4L2_CID_MPEG_VIDEO_H264_VUI_SAR_ENABLE (boolean)``
>>      Enable writing sample aspect ratio in the Video Usability
>>      Information. Applicable to the H264 encoder.
>> diff --git a/drivers/media/v4l2-core/v4l2-ctrls.c b/drivers/media/v4l2-core/v4l2-ctrls.c
>> index bd7f330c941c..4a21802e026b 100644
>> --- a/drivers/media/v4l2-core/v4l2-ctrls.c
>> +++ b/drivers/media/v4l2-core/v4l2-ctrls.c
>> @@ -874,6 +874,8 @@ const char *v4l2_ctrl_get_name(u32 id)
>>  	case V4L2_CID_MPEG_VIDEO_HEADER_MODE:			return "Sequence Header Mode";
>>  	case V4L2_CID_MPEG_VIDEO_MAX_REF_PIC:			return "Max Number of Reference Pics";
>>  	case V4L2_CID_MPEG_VIDEO_FRAME_SKIP_MODE:		return "Frame Skip Mode";
>> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:		return "Display Delay";
>> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:	return "Display Delay Enable";
>>  	case V4L2_CID_MPEG_VIDEO_H263_I_FRAME_QP:		return "H263 I-Frame QP Value";
>>  	case V4L2_CID_MPEG_VIDEO_H263_P_FRAME_QP:		return "H263 P-Frame QP Value";
>>  	case V4L2_CID_MPEG_VIDEO_H263_B_FRAME_QP:		return "H263 B-Frame QP Value";
>> @@ -1221,6 +1223,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>>  	case V4L2_CID_FLASH_READY:
>>  	case V4L2_CID_MPEG_VIDEO_DECODER_MPEG4_DEBLOCK_FILTER:
>>  	case V4L2_CID_MPEG_VIDEO_DECODER_SLICE_INTERFACE:
>> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE:
>>  	case V4L2_CID_MPEG_VIDEO_FRAME_RC_ENABLE:
>>  	case V4L2_CID_MPEG_VIDEO_MB_RC_ENABLE:
>>  	case V4L2_CID_MPEG_VIDEO_H264_8X8_TRANSFORM:
>> @@ -1256,6 +1259,7 @@ void v4l2_ctrl_fill(u32 id, const char **name, enum v4l2_ctrl_type *type,
>>  		break;
>>  	case V4L2_CID_MPEG_VIDEO_MV_H_SEARCH_RANGE:
>>  	case V4L2_CID_MPEG_VIDEO_MV_V_SEARCH_RANGE:
>> +	case V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY:
>>  		*type = V4L2_CTRL_TYPE_INTEGER;
>>  		break;
>>  	case V4L2_CID_MPEG_VIDEO_FORCE_KEY_FRAME:
>> diff --git a/include/uapi/linux/v4l2-controls.h b/include/uapi/linux/v4l2-controls.h
>> index 7035f4fb182c..d6b19f8d0022 100644
>> --- a/include/uapi/linux/v4l2-controls.h
>> +++ b/include/uapi/linux/v4l2-controls.h
>> @@ -773,6 +773,8 @@ enum v4l2_mpeg_video_frame_skip_mode {
>>  	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_LEVEL_LIMIT	= 1,
>>  	V4L2_MPEG_VIDEO_FRAME_SKIP_MODE_BUF_LIMIT	= 2,
>>  };
>> +#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY		(V4L2_CID_MPEG_BASE + 647)
>> +#define V4L2_CID_MPEG_VIDEO_DECODER_DISPLAY_DELAY_ENABLE	(V4L2_CID_MPEG_BASE + 648)
> 
> This will need to be rebased once this PR is merged:
> https://patchwork.linuxtv.org/project/linux-media/patch/d68da172-b251-000f-653d-38a8a4c7b715@xs4all.nl/
> 
>>  
>>  /*  MPEG-class control IDs specific to the CX2341x driver as defined by V4L2 */
>>  #define V4L2_CID_MPEG_CX2341X_BASE				(V4L2_CTRL_CLASS_MPEG | 0x1000)
>>
> 
> Regards,
> 
> 	Hans
> 

-- 
regards,
Stan

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