From: wenbiao zhang <wenbiao.zhang@amlogic.com>
Date: Fri, 18 Jan 2019 09:03:54 +0000 (+0800)
Subject: bandwidth: fix wrong bandwidth usage on t950 [1/3]
X-Git-Tag: hardkernel-4.9.236-104~1812
X-Git-Url: http://review.tizen.org/git/?a=commitdiff_plain;h=301972ebb7e5bacd848bfabdb8bafcdc937a6091;p=platform%2Fkernel%2Flinux-amlogic.git

bandwidth: fix wrong bandwidth usage on t950 [1/3]

PD#TV-470

Problem:
t950 ddr bandwidth usage is error

Solution:
t950/805x ddr is 16bit, correct the param to get right usage

Verify:
t950

Change-Id: Ice876f82e5c33e778b3ac9f593e0c163d57d7f3f
Signed-off-by: wenbiao zhang <wenbiao.zhang@amlogic.com>
---

diff --git a/drivers/amlogic/ddr_tool/ddr_bandwidth.c b/drivers/amlogic/ddr_tool/ddr_bandwidth.c
index 9412335..fcb4335 100644
--- a/drivers/amlogic/ddr_tool/ddr_bandwidth.c
+++ b/drivers/amlogic/ddr_tool/ddr_bandwidth.c
@@ -74,7 +74,7 @@ static void cal_ddr_usage(struct ddr_bandwidth *db, struct ddr_grant *dg)
 		freq = db->ops->get_freq(db);
 	mul  = dg->all_grant;
 	mul *= 10000ULL;
-	mul /= 16;
+	do_div(mul, db->bytes_per_cycle);
 	cnt  = db->clock_count;
 	do_div(mul, cnt);
 	db->total_usage = mul;
@@ -203,7 +203,8 @@ static ssize_t threshold_show(struct class *cla,
 	struct class_attribute *attr, char *buf)
 {
 	return sprintf(buf, "%d\n",
-		aml_db->threshold / 16 / (aml_db->clock_count / 10000));
+			aml_db->threshold / aml_db->bytes_per_cycle
+			/ (aml_db->clock_count / 10000));
 }
 
 static ssize_t threshold_store(struct class *cla,
@@ -218,7 +219,8 @@ static ssize_t threshold_store(struct class *cla,
 
 	if (val > 10000)
 		val = 10000;
-	aml_db->threshold = val * 16 * (aml_db->clock_count / 10000);
+	aml_db->threshold = val * aml_db->bytes_per_cycle
+			* (aml_db->clock_count / 10000);
 	return count;
 }
 
@@ -545,6 +547,11 @@ static int __init ddr_bandwidth_probe(struct platform_device *pdev)
 		goto inval;
 	}
 
+	if (is_meson_txl_package_950() || is_meson_gxl_package_805X())
+		aml_db->bytes_per_cycle = 8;
+	else
+		aml_db->bytes_per_cycle = 16;
+
 	/* set channel */
 	if (aml_db->cpu_type < MESON_CPU_MAJOR_ID_GXTVBB) {
 		aml_db->channels = 1;
@@ -599,7 +606,7 @@ static int __init ddr_bandwidth_probe(struct platform_device *pdev)
 #endif
 	aml_db->clock_count = DEFAULT_CLK_CNT;
 	aml_db->mode = MODE_DISABLE;
-	aml_db->threshold = DEFAULT_THRESHOLD * 16 *
+	aml_db->threshold = DEFAULT_THRESHOLD * aml_db->bytes_per_cycle *
 			(aml_db->clock_count / 10000);
 	if (aml_db->cpu_type <= MESON_CPU_MAJOR_ID_GXTVBB)
 		aml_db->ops = &gx_ddr_bw_ops;
diff --git a/include/linux/amlogic/aml_ddr_bandwidth.h b/include/linux/amlogic/aml_ddr_bandwidth.h
index bde095b..42346db 100644
--- a/include/linux/amlogic/aml_ddr_bandwidth.h
+++ b/include/linux/amlogic/aml_ddr_bandwidth.h
@@ -134,6 +134,7 @@ struct ddr_bandwidth {
 	unsigned short real_ports;
 	char busy;
 	char mode;
+	char bytes_per_cycle;
 	int mali_port[2];
 	unsigned int threshold;
 	unsigned int irq_num;
diff --git a/include/linux/amlogic/cpu_version.h b/include/linux/amlogic/cpu_version.h
index 4a19070..09b768a 100644
--- a/include/linux/amlogic/cpu_version.h
+++ b/include/linux/amlogic/cpu_version.h
@@ -147,6 +147,11 @@ static inline bool is_meson_txl_cpu(void)
 	return get_cpu_type() == MESON_CPU_MAJOR_ID_TXL;
 }
 
+static inline bool is_meson_txl_package_950(void)
+{
+	return is_meson_txl_cpu() && package_id_is(0x20);
+}
+
 static inline bool is_meson_txlx_cpu(void)
 {
 	return get_cpu_type() == MESON_CPU_MAJOR_ID_TXLX;