[PATCH] drm/amd/pm: fix the uninitialized scalar variable warning

[Zhang, Jesse(Jie)]

[AMD Official Use Only - General]

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-----Original Message-----
From: Jesse Zhang <jesse.zhang at amd.com>
Sent: Tuesday, April 30, 2024 3:14 PM
To: amd-gfx at lists.freedesktop.org
Cc: Deucher, Alexander <Alexander.Deucher at amd.com>; Koenig, Christian <Christian.Koenig at amd.com>; Huang, Tim <Tim.Huang at amd.com>; Zhang, Jesse(Jie) <Jesse.Zhang at amd.com>; Zhang, Jesse(Jie) <Jesse.Zhang at amd.com>
Subject: [PATCH] drm/amd/pm: fix the uninitialized scalar variable warning

Fix warning for using uninitialized values sclk_mask, mclk_mask and soc_mask.
v2:Set default variable to UMD PSTATE(Tim Huang)

Signed-off-by: Jesse Zhang <Jesse.Zhang at amd.com>
---
 .../gpu/drm/amd/pm/swsmu/smu12/renoir_ppt.c   | 32 ++++++++++++++++---
 1 file changed, 27 insertions(+), 5 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu12/renoir_ppt.c b/drivers/gpu/drm/amd/pm/swsmu/smu12/renoir_ppt.c
index 8908bbb3ff1f..36a49cfc22e4 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu12/renoir_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu12/renoir_ppt.c
@@ -835,10 +835,20 @@ static int renoir_force_clk_levels(struct smu_context *smu,
                ret = renoir_get_dpm_clk_limited(smu, clk_type, soft_max_level, &max_freq);
                if (ret)
                        return ret;
-               ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMaxSocclkByFreq, max_freq, NULL);
+                /* =  0: min_freq
+                 * =  1: UMD_PSTATE_CLK
+                 * >= 2: max_freq
+                 */
+               ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMaxSocclkByFreq,
+                                                       soft_max_level == 0 ? min_freq :
+                                                       soft_max_level == 1 ? RENOIR_UMD_PSTATE_SOCCLK : max_freq,
+                                                       NULL);
                if (ret)
                        return ret;
-               ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetHardMinSocclkByFreq, min_freq, NULL);
+               ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetHardMinSocclkByFreq,
+                                                       soft_min_level == 0 ? min_freq :
+                                                       soft_min_level == 1 ? RENOIR_UMD_PSTATE_SOCCLK : max_freq,
+                                                       NULL);
                if (ret)
                        return ret;
                break;
@@ -850,10 +860,21 @@ static int renoir_force_clk_levels(struct smu_context *smu,
                ret = renoir_get_dpm_clk_limited(smu, clk_type, soft_max_level, &max_freq);
                if (ret)
                        return ret;
-               ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMaxFclkByFreq, max_freq, NULL);
+               /* mclk levels are in reverse order
+                * =  0: max_freq
+                * =  1: UMD_PSTATE_CLK
+                * >= 2: min_freq
+                */
+               ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetSoftMaxFclkByFreq,
+                                                       soft_max_level >= 2 ? min_freq :
+                                                       soft_max_level == 1 ? RENOIR_UMD_PSTATE_FCLK : max_freq,
+                                                       NULL);
                if (ret)
                        return ret;
-               ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetHardMinFclkByFreq, min_freq, NULL);
+               ret = smu_cmn_send_smc_msg_with_param(smu, SMU_MSG_SetHardMinFclkByFreq,
+                                                       soft_min_level >= 2  ? min_freq :
+                                                       soft_min_level == 1 ? RENOIR_UMD_PSTATE_SOCCLK : max_freq,
+                                                       NULL);
                if (ret)
                        return ret;
                break;
@@ -932,7 +953,8 @@ static int renoir_set_performance_level(struct smu_context *smu,
                                        enum amd_dpm_forced_level level)
 {
        int ret = 0;
-       uint32_t sclk_mask, mclk_mask, soc_mask;
+       /* default mask is UMD PSTATE CLK */
+       uint32_t sclk_mask = 1, mclk_mask = 1, soc_mask = 1;

        switch (level) {
        case AMD_DPM_FORCED_LEVEL_HIGH:
--
2.25.1