media: chips-media: wave5: Add support for background detection

Implement V4L2_CID_MPEG_VIDEO_BACKGROUND_DETECTION in the Wave5 encoder
driver. When enabled, the hardware detects background regions in a frame
and uses fewer bits or skip mode to encode them, reducing bitrate for
streams with stationary scenes.

Signed-off-by: Jackson Lee <jackson.lee@chipsnmedia.com>
Signed-off-by: Nas Chung <nas.chung@chipsnmedia.com>
Reviewed-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Nicolas Dufresne <nicolas.dufresne@collabora.com>
Signed-off-by: Hans Verkuil <hverkuil+cisco@kernel.org>

diff --git a/drivers/media/platform/chips-media/wave5/wave5-hw.c b/drivers/media/platform/chips-media/wave5/wave5-hw.c
index 687ce6ccf3ae24e374ba9086efcf67f703eccfbb..c516d125f55399456ec5cf8ac8c2da7215031c83 100644 (file)
--- a/drivers/media/platform/chips-media/wave5/wave5-hw.c
+++ b/drivers/media/platform/chips-media/wave5/wave5-hw.c
@@ -49,6 +49,7 @@
 
 #define FASTIO_ADDRESS_MASK            GENMASK(15, 0)
 #define SEQ_PARAM_PROFILE_MASK         GENMASK(30, 24)
+#define SEQ_BG_PARAM_REG_DATA          0x3800410
 
 static void _wave5_print_reg_err(struct vpu_device *vpu_dev, u32 reg_fail_reason,
                                 const char *func);
@@ -1838,7 +1839,8 @@ int wave5_vpu_enc_init_seq(struct vpu_instance *inst)
        vpu_write_reg(inst->dev, W5_CMD_ENC_SEQ_RC_BIT_RATIO_LAYER_4_7, 0);
        vpu_write_reg(inst->dev, W5_CMD_ENC_SEQ_ROT_PARAM, rot_mir_mode);
 
-       vpu_write_reg(inst->dev, W5_CMD_ENC_SEQ_BG_PARAM, 0);
+       vpu_write_reg(inst->dev, W5_CMD_ENC_SEQ_BG_PARAM,
+                     SEQ_BG_PARAM_REG_DATA | p_param->bg_detection);
        vpu_write_reg(inst->dev, W5_CMD_ENC_SEQ_CUSTOM_LAMBDA_ADDR, 0);
        vpu_write_reg(inst->dev, W5_CMD_ENC_SEQ_CONF_WIN_TOP_BOT,
                      p_param->conf_win_bot << 16 | p_param->conf_win_top);

diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c b/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
index c605a91718d8bb97d7a0a731518a78fa4de8d7e7..e806973305ce19c2bb31f502bb146db0b1a33950 100644 (file)
--- a/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpu-enc.c
@@ -759,6 +759,9 @@ static int wave5_vpu_enc_s_ctrl(struct v4l2_ctrl *ctrl)
        case V4L2_CID_MPEG_VIDEO_BITRATE:
                inst->bit_rate = ctrl->val;
                break;
+       case V4L2_CID_MPEG_VIDEO_BACKGROUND_DETECTION:
+               inst->enc_param.bg_detection = ctrl->val;
+               break;
        case V4L2_CID_MPEG_VIDEO_GOP_SIZE:
                inst->enc_param.avc_idr_period = ctrl->val;
                break;
@@ -1184,6 +1187,7 @@ static int wave5_set_enc_openparam(struct enc_open_param *open_param,
        open_param->wave_param.beta_offset_div2 = input.beta_offset_div2;
        open_param->wave_param.decoding_refresh_type = input.decoding_refresh_type;
        open_param->wave_param.intra_period = input.intra_period;
+       open_param->wave_param.bg_detection = input.bg_detection;
        if (inst->std == W_HEVC_ENC) {
                if (input.intra_period == 0) {
                        open_param->wave_param.decoding_refresh_type = DEC_REFRESH_TYPE_IDR;
@@ -1679,6 +1683,9 @@ static int wave5_vpu_open_enc(struct file *filp)
        v4l2_ctrl_new_std(v4l2_ctrl_hdl, &wave5_vpu_enc_ctrl_ops,
                          V4L2_CID_MPEG_VIDEO_AU_DELIMITER,
                          0, 1, 1, 1);
+       v4l2_ctrl_new_std(v4l2_ctrl_hdl, &wave5_vpu_enc_ctrl_ops,
+                         V4L2_CID_MPEG_VIDEO_BACKGROUND_DETECTION,
+                         0, 1, 1, 0);
        v4l2_ctrl_new_std(v4l2_ctrl_hdl, &wave5_vpu_enc_ctrl_ops,
                          V4L2_CID_HFLIP,
                          0, 1, 1, 0);

diff --git a/drivers/media/platform/chips-media/wave5/wave5-vpuapi.h b/drivers/media/platform/chips-media/wave5/wave5-vpuapi.h
index c6413576986912fa0a3e7f125a160905e1cbe2fc..dc31689e0d27da0797fe7c93487e68bcee6cca49 100644 (file)
--- a/drivers/media/platform/chips-media/wave5/wave5-vpuapi.h
+++ b/drivers/media/platform/chips-media/wave5/wave5-vpuapi.h
@@ -570,6 +570,7 @@ struct enc_wave_param {
        u32 transform8x8_enable: 1; /* enable 8x8 intra prediction and 8x8 transform */
        u32 mb_level_rc_enable: 1; /* enable MB-level rate control */
        u32 forced_idr_header_enable: 1; /* enable header encoding before IDR frame */
+       u32 bg_detection: 1; /* enable background detection */
 };
 
 struct enc_open_param {