diff --git a/msm/vidc/msm_vidc_buffer_calculations.c b/msm/vidc/msm_vidc_buffer_calculations.c
index c119cf6ba1ac..a94be0a9e2b6 100644
--- a/msm/vidc/msm_vidc_buffer_calculations.c
+++ b/msm/vidc/msm_vidc_buffer_calculations.c
@@ -782,22 +782,14 @@ u32 msm_vidc_calculate_dec_input_frame_size(struct msm_vidc_inst *inst)
 
 	frame_size = base_res_mbs * MB_SIZE_IN_PIXEL * 3 / 2 / div_factor;
 
-	if (is_secure_session(inst)) {
-		u32 max_bitrate = inst->capability.cap[CAP_SECURE_BITRATE].max;
-
-		/*
-		 * for secure, calc frame_size based on max bitrate,
-		 * peak bitrate can be 10 times more and
-		 * frame rate assumed to be 30 fps at least
-		 */
-		frame_size = (max_bitrate * 10 / 8) / 30;
-	}
-
 	 /* multiply by 10/8 (1.25) to get size for 10 bit case */
 	if ((f->fmt.pix_mp.pixelformat == V4L2_PIX_FMT_VP9) ||
 		(f->fmt.pix_mp.pixelformat == V4L2_PIX_FMT_HEVC))
 		frame_size = frame_size + (frame_size >> 2);
 
+	if (is_secure_session(inst))
+		frame_size /= 2;
+
 	if (inst->buffer_size_limit &&
 		(inst->buffer_size_limit < frame_size)) {
 		frame_size = inst->buffer_size_limit;