linux-kernel - [PATCH 15/20] media: iris: Add a comment to explain usage of MBPS

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Message-ID: <20250408-iris-dec-hevc-vp9-v1-15-acd258778bd6@quicinc.com>
Date: Tue, 8 Apr 2025 21:24:29 +0530
From: Dikshita Agarwal <quic_dikshita@...cinc.com>
To: Vikash Garodia <quic_vgarodia@...cinc.com>,
        Abhinav Kumar
	<quic_abhinavk@...cinc.com>,
        Mauro Carvalho Chehab <mchehab@...nel.org>,
        Stefan Schmidt <stefan.schmidt@...aro.org>,
        Hans Verkuil
	<hverkuil@...all.nl>,
        Bjorn Andersson <andersson@...nel.org>,
        Konrad Dybcio
	<konradybcio@...nel.org>, Rob Herring <robh@...nel.org>,
        Krzysztof Kozlowski
	<krzk+dt@...nel.org>,
        Conor Dooley <conor+dt@...nel.org>
CC: Bryan O'Donoghue <bryan.odonoghue@...aro.org>,
        Dmitry Baryshkov
	<dmitry.baryshkov@...aro.org>,
        Neil Armstrong <neil.armstrong@...aro.org>,
        <linux-media@...r.kernel.org>, <linux-arm-msm@...r.kernel.org>,
        <linux-kernel@...r.kernel.org>, <devicetree@...r.kernel.org>,
        "Dikshita
 Agarwal" <quic_dikshita@...cinc.com>
Subject: [PATCH 15/20] 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

Signed-off-by: Dikshita Agarwal <quic_dikshita@...cinc.com>
---
 drivers/media/platform/qcom/iris/iris_platform_common.h | 2 ++
 drivers/media/platform/qcom/iris/iris_platform_sm8250.c | 2 +-
 drivers/media/platform/qcom/iris/iris_platform_sm8550.c | 2 +-
 3 files changed, 4 insertions(+), 2 deletions(-)

diff --git a/drivers/media/platform/qcom/iris/iris_platform_common.h b/drivers/media/platform/qcom/iris/iris_platform_common.h
index c00fd4a83ba7..229697b2257a 100644
--- a/drivers/media/platform/qcom/iris/iris_platform_common.h
+++ b/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,
@@ -168,6 +169,7 @@ 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;
diff --git a/drivers/media/platform/qcom/iris/iris_platform_sm8250.c b/drivers/media/platform/qcom/iris/iris_platform_sm8250.c
index 543fa2661539..8183e4e95fa4 100644
--- a/drivers/media/platform/qcom/iris/iris_platform_sm8250.c
+++ b/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 =
diff --git a/drivers/media/platform/qcom/iris/iris_platform_sm8550.c b/drivers/media/platform/qcom/iris/iris_platform_sm8550.c
index 35d278996c43..49e775dd1b95 100644
--- a/drivers/media/platform/qcom/iris/iris_platform_sm8550.c
+++ b/drivers/media/platform/qcom/iris/iris_platform_sm8550.c
@@ -245,7 +245,7 @@ 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 =

-- 
2.34.1