[PATCH] drm/amdgpu: change pp_dpm clk/mclk/pcie input format

[welu]

1. support more than 8 values when setting get_pp_dpm_mclk/
sclk/pcie, the former design just parse command format like
"echo xxxx >　pp_dpm_sclk" and current can parse "echo xx xxx
 xxxx > pp_dpm_sclk" whose operation is more user-friendly
and convinent and can offer more values;
2. be compatible with former design like "xx".
Bug:KFD-385

Change-Id: Id7d95ce45f4ee0564b18ebcfc16976f1a5c6bf72
Signed-off-by: welu <wei.lu2 at amd.com>
---
 drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c | 95 ++++++++++++++++++++--------------
 1 file changed, 55 insertions(+), 40 deletions(-)

diff --git a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
index 744f105..58f46f9 100644
--- a/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
+++ b/drivers/gpu/drm/amd/amdgpu/amdgpu_pm.c
@@ -466,23 +466,27 @@ static ssize_t amdgpu_set_pp_dpm_sclk(struct device *dev,
 	struct amdgpu_device *adev = ddev->dev_private;
 	int ret;
 	long level;
-	uint32_t i, mask = 0;
-	char sub_str[2];
+	uint32_t mask = 0;
+	char *sub_str = NULL;
+	char *tmp;
+	char buf_cpy[count];
+	const char delimiter[3] = {' ', '\n', '\0'};
 
-	for (i = 0; i < strlen(buf); i++) {
-		if (*(buf + i) == '\n')
-			continue;
-		sub_str[0] = *(buf + i);
-		sub_str[1] = '\0';
-		ret = kstrtol(sub_str, 0, &level);
+	memcpy(buf_cpy, buf, count+1);
+	tmp = buf_cpy;
+	while (tmp[0]) {
+		sub_str =  strsep(&tmp, delimiter);
+		if (strlen(sub_str)) {
+			ret = kstrtol(sub_str, 0, &level);
 
-		if (ret) {
-			count = -EINVAL;
-			goto fail;
-		}
-		mask |= 1 << level;
+			if (ret) {
+				count = -EINVAL;
+				goto fail;
+			}
+			mask |= 1 << level;
+		} else
+			break;
 	}
-
 	if (adev->powerplay.pp_funcs->force_clock_level)
 		amdgpu_dpm_force_clock_level(adev, PP_SCLK, mask);
 
@@ -512,21 +516,26 @@ static ssize_t amdgpu_set_pp_dpm_mclk(struct device *dev,
 	struct amdgpu_device *adev = ddev->dev_private;
 	int ret;
 	long level;
-	uint32_t i, mask = 0;
-	char sub_str[2];
+	uint32_t mask = 0;
+	char *sub_str = NULL;
+	char *tmp;
+	char buf_cpy[count];
+	const char delimiter[3] = {' ', '\n', '\0'};
 
-	for (i = 0; i < strlen(buf); i++) {
-		if (*(buf + i) == '\n')
-			continue;
-		sub_str[0] = *(buf + i);
-		sub_str[1] = '\0';
-		ret = kstrtol(sub_str, 0, &level);
+	memcpy(buf_cpy, buf, count+1);
+	tmp = buf_cpy;
+	while (tmp[0]) {
+		sub_str =  strsep(&tmp, delimiter);
+		if (strlen(sub_str)) {
+			ret = kstrtol(sub_str, 0, &level);
 
-		if (ret) {
-			count = -EINVAL;
-			goto fail;
-		}
-		mask |= 1 << level;
+			if (ret) {
+				count = -EINVAL;
+				goto fail;
+			}
+			mask |= 1 << level;
+		} else
+			break;
 	}
 	if (adev->powerplay.pp_funcs->force_clock_level)
 		amdgpu_dpm_force_clock_level(adev, PP_MCLK, mask);
@@ -557,21 +566,27 @@ static ssize_t amdgpu_set_pp_dpm_pcie(struct device *dev,
 	struct amdgpu_device *adev = ddev->dev_private;
 	int ret;
 	long level;
-	uint32_t i, mask = 0;
-	char sub_str[2];
+	uint32_t mask = 0;
+	char *sub_str = NULL;
+	char *tmp;
+	char buf_cpy[count];
+	const char delimiter[3] = {' ', '\n', '\0'};
 
-	for (i = 0; i < strlen(buf); i++) {
-		if (*(buf + i) == '\n')
-			continue;
-		sub_str[0] = *(buf + i);
-		sub_str[1] = '\0';
-		ret = kstrtol(sub_str, 0, &level);
+	memcpy(buf_cpy, buf, count+1);
+	tmp = buf_cpy;
 
-		if (ret) {
-			count = -EINVAL;
-			goto fail;
-		}
-		mask |= 1 << level;
+	while (tmp[0]) {
+		sub_str =  strsep(&tmp, delimiter);
+		if (strlen(sub_str)) {
+			ret = kstrtol(sub_str, 0, &level);
+
+			if (ret) {
+				count = -EINVAL;
+				goto fail;
+			}
+			mask |= 1 << level;
+		} else
+			break;
 	}
 	if (adev->powerplay.pp_funcs->force_clock_level)
 		amdgpu_dpm_force_clock_level(adev, PP_PCIE, mask);
-- 
2.7.4