[PATCH] drm/amd/pm: Allocate dummy table only if needed

[Lijo Lazar]

Only Navi1x requires dummy read workaround. Allocate the table in VRAM
only for Navi1x.

Signed-off-by: Lijo Lazar <lijo.la...@amd.com>
---
 drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c       | 5 ++---
 drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c | 6 ++++++
 2 files changed, 8 insertions(+), 3 deletions(-)

diff --git a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c 
b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
index ec52830dde24..612f62529575 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/amdgpu_smu.c
@@ -904,9 +904,8 @@ static int smu_alloc_dummy_read_table(struct smu_context 
*smu)
        struct amdgpu_device *adev = smu->adev;
        int ret = 0;
 
-       dummy_read_1_table->size = 0x40000;
-       dummy_read_1_table->align = PAGE_SIZE;
-       dummy_read_1_table->domain = AMDGPU_GEM_DOMAIN_VRAM;
+       if (!dummy_read_1_table->size)
+               return 0;
 
        ret = amdgpu_bo_create_kernel(adev,
                                      dummy_read_1_table->size,
diff --git a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c 
b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
index 0bcd4fe0ef17..95da6dd1cc65 100644
--- a/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
+++ b/drivers/gpu/drm/amd/pm/swsmu/smu11/navi10_ppt.c
@@ -494,6 +494,8 @@ static int navi10_tables_init(struct smu_context *smu)
 {
        struct smu_table_context *smu_table = &smu->smu_table;
        struct smu_table *tables = smu_table->tables;
+       struct smu_table *dummy_read_1_table =
+                       &smu_table->dummy_read_1_table;
 
        SMU_TABLE_INIT(tables, SMU_TABLE_PPTABLE, sizeof(PPTable_t),
                       PAGE_SIZE, AMDGPU_GEM_DOMAIN_VRAM);
@@ -513,6 +515,10 @@ static int navi10_tables_init(struct smu_context *smu)
        SMU_TABLE_INIT(tables, SMU_TABLE_DRIVER_SMU_CONFIG, 
sizeof(DriverSmuConfig_t),
                       PAGE_SIZE, AMDGPU_GEM_DOMAIN_VRAM);
 
+       dummy_read_1_table->size = 0x40000;
+       dummy_read_1_table->align = PAGE_SIZE;
+       dummy_read_1_table->domain = AMDGPU_GEM_DOMAIN_VRAM;
+
        smu_table->metrics_table = kzalloc(sizeof(SmuMetrics_NV1X_t),
                                           GFP_KERNEL);
        if (!smu_table->metrics_table)
-- 
2.25.1