media: s5p-mfc: Add support for rate controls in MFCv12

In MFCv12, the rc configs are changed with support for CBR loose,
CBR tight and Variable Bitrate (VBR) added.

Cc: linux-fsd@tesla.com
Signed-off-by: Smitha T Murthy <smithatmurthy@gmail.com>
Signed-off-by: Aakarsh Jain <aakarsh.jain@samsung.com>
Signed-off-by: Hans Verkuil <hverkuil-cisco@xs4all.nl>

Author: Aakarsh Jain

drivers/media/platform/samsung/s5p-mfc/s5p_mfc_opr_v6.c

@@ -992,10 +992,24 @@ static int s5p_mfc_set_enc_params(struct s5p_mfc_ctx *ctx)
 
 	/* reaction coefficient */
 	if (p->rc_frame) {
-		if (p->rc_reaction_coeff < TIGHT_CBR_MAX) /* tight CBR */
-			writel(1, mfc_regs->e_rc_mode);
-		else					  /* loose CBR */
-			writel(2, mfc_regs->e_rc_mode);
+		if (IS_MFCV12(dev)) {
+			/* loose CBR */
+			if (p->rc_reaction_coeff < LOOSE_CBR_MAX)
+				writel(1, mfc_regs->e_rc_mode);
+			/* tight CBR */
+			else if (p->rc_reaction_coeff < TIGHT_CBR_MAX)
+				writel(0, mfc_regs->e_rc_mode);
+			/* VBR */
+			else
+				writel(2, mfc_regs->e_rc_mode);
+		} else {
+			/* tight CBR */
+			if (p->rc_reaction_coeff < TIGHT_CBR_MAX)
+				writel(1, mfc_regs->e_rc_mode);
+			/* loose CBR */
+			else
+				writel(2, mfc_regs->e_rc_mode);
+		}
 	}
 
 	/* seq header ctrl */

drivers/media/platform/samsung/s5p-mfc/s5p_mfc_opr_v6.h

@@ -40,6 +40,7 @@
 #define ENC_H264_LEVEL_MAX		42
 #define ENC_MPEG4_VOP_TIME_RES_MAX	((1 << 16) - 1)
 #define FRAME_DELTA_H264_H263		1
+#define LOOSE_CBR_MAX			5
 #define TIGHT_CBR_MAX			10
 #define ENC_HEVC_RC_FRAME_RATE_MAX	((1 << 16) - 1)
 #define ENC_HEVC_QP_INDEX_MIN		-12