FROMLIST: media: iris: Add internal buffer calculation for HEVC and VP9 decoders

Add internal buffer count and size calculations for HEVC and VP9
decoders.

Link: https://lore.kernel.org/linux-arm-msm/20250509-video-iris-hevc-vp9-v5-25-59b4ff7d331c@quicinc.com/
Acked-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8550-HDK
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-QRD
Tested-by: Neil Armstrong <neil.armstrong@linaro.org> # on SM8650-HDK
Tested-by: Vikash Garodia <quic_vgarodia@quicinc.com> # on sa8775p-ride
Signed-off-by: Dikshita Agarwal <quic_dikshita@quicinc.com>

Author: Dikshita Agarwal

drivers/media/platform/qcom/iris/iris_buffer.c

@@ -205,6 +205,9 @@ static u32 iris_bitstream_buffer_size(struct iris_inst *inst)
 	if (num_mbs > NUM_MBS_4K) {
 		div_factor = 4;
 		base_res_mbs = caps->max_mbpf;
+	} else {
+		if (inst->codec == V4L2_PIX_FMT_VP9)
+			div_factor = 1;
 	}
 
 	/*