[PATCH] drm/amd/powerplay: report bootup clock as max supported on dpm disabled

[Evan Quan]

With gfxclk or uclk dpm disabled, it's reasonable to report bootup clock
as the max supported.

Change-Id: If8aa7a912e8a34414b0e9c2b46de9b6e316fd9d7
Signed-off-by: Evan Quan <evan.q...@amd.com>
---
 drivers/gpu/drm/amd/powerplay/amdgpu_smu.c | 27 ++++++++++++++++++++++++++-
 1 file changed, 26 insertions(+), 1 deletion(-)

diff --git a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c 
b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
index 5d5664f..d370b09 100644
--- a/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/powerplay/amdgpu_smu.c
@@ -137,12 +137,37 @@ int smu_get_dpm_freq_range(struct smu_context *smu, enum 
smu_clk_type clk_type,
 {
        int ret = 0, clk_id = 0;
        uint32_t param = 0;
+       uint32_t clock_limit;
 
        if (!min && !max)
                return -EINVAL;
 
-       if (!smu_clk_dpm_is_enabled(smu, clk_type))
+       if (!smu_clk_dpm_is_enabled(smu, clk_type)) {
+               switch (clk_type) {
+               case SMU_MCLK:
+               case SMU_UCLK:
+                       clock_limit = smu->smu_table.boot_values.uclk;
+                       break;
+               case SMU_GFXCLK:
+               case SMU_SCLK:
+                       clock_limit = smu->smu_table.boot_values.gfxclk;
+                       break;
+               case SMU_SOCCLK:
+                       clock_limit = smu->smu_table.boot_values.socclk;
+                       break;
+               default:
+                       clock_limit = 0;
+                       break;
+               }
+
+               /* clock in Mhz unit */
+               if (min)
+                       *min = clock_limit / 100;
+               if (max)
+                       *max = clock_limit / 100;
+
                return 0;
+       }
 
        mutex_lock(&smu->mutex);
        clk_id = smu_clk_get_index(smu, clk_type);
-- 
2.7.4

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