FROMLIST: media: iris: Add a comment to explain usage of MBPS

Add a comment to explain usage of MBPS and define a macro for 8K
resolution for better readability

Link: https://lore.kernel.org/linux-arm-msm/20250509-video-iris-hevc-vp9-v5-21-59b4ff7d331c@quicinc.com/
Acked-by: Vikash Garodia <quic_vgarodia@quicinc.com>
Reviewed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
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_platform_common.h

@@ -21,6 +21,7 @@ struct iris_inst;
 #define DEFAULT_MAX_HOST_BUF_COUNT		64
 #define DEFAULT_MAX_HOST_BURST_BUF_COUNT	256
 #define DEFAULT_FPS				30
+#define NUM_MBS_8K				((8192 * 4352) / 256)
 
 enum stage_type {
 	STAGE_1 = 1,
@@ -172,6 +173,7 @@ struct iris_platform_data {
 	struct ubwc_config_data *ubwc_config;
 	u32 num_vpp_pipe;
 	u32 max_session_count;
+	/* max number of macroblocks per frame supported */
 	u32 max_core_mbpf;
 	const u32 *input_config_params;
 	unsigned int input_config_params_size;

drivers/media/platform/qcom/iris/iris_platform_gen2.c

@@ -248,7 +248,7 @@ struct iris_platform_data sm8550_data = {
 	.ubwc_config = &ubwc_config_sm8550,
 	.num_vpp_pipe = 4,
 	.max_session_count = 16,
-	.max_core_mbpf = ((8192 * 4352) / 256) * 2,
+	.max_core_mbpf = NUM_MBS_8K * 2,
 	.input_config_params =
 		sm8550_vdec_input_config_params,
 	.input_config_params_size =
@@ -308,7 +308,7 @@ struct iris_platform_data sm8650_data = {
 	.ubwc_config = &ubwc_config_sm8550,
 	.num_vpp_pipe = 4,
 	.max_session_count = 16,
-	.max_core_mbpf = ((8192 * 4352) / 256) * 2,
+	.max_core_mbpf = NUM_MBS_8K * 2,
 	.input_config_params =
 		sm8550_vdec_input_config_params,
 	.input_config_params_size =

drivers/media/platform/qcom/iris/iris_platform_sm8250.c

@@ -127,7 +127,7 @@ struct iris_platform_data sm8250_data = {
 	.hw_response_timeout = HW_RESPONSE_TIMEOUT_VALUE,
 	.num_vpp_pipe = 4,
 	.max_session_count = 16,
-	.max_core_mbpf = (8192 * 4352) / 256,
+	.max_core_mbpf = NUM_MBS_8K,
 	.input_config_params =
 		sm8250_vdec_input_config_param_default,
 	.input_config_params_size =