[Freedreno] [PATCH v2 8/9] drm/msm/a6xx: enable GMU log

[Jonathan Marek]

This is required for a650 to work.

Signed-off-by: Jonathan Marek <jonat...@marek.ca>
---
 drivers/gpu/drm/msm/adreno/a6xx_gmu.c     | 15 +++++++++++++++
 drivers/gpu/drm/msm/adreno/a6xx_gmu.h     |  1 +
 drivers/gpu/drm/msm/adreno/a6xx_gmu.xml.h |  4 ++++
 3 files changed, 20 insertions(+)

diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c 
b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
index 60ed5360fd8a..f24e436daafe 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.c
@@ -201,6 +201,12 @@ static int a6xx_gmu_start(struct a6xx_gmu *gmu)
        u32 val;
 
        gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 1);
+
+       /* Set the log wptr index
+        * note: downstream saves the value in poweroff and restores it here
+        */
+       gmu_write(gmu, REG_A6XX_GPU_GMU_CX_GMU_PWR_COL_CP_RESP, 0);
+
        gmu_write(gmu, REG_A6XX_GMU_CM3_SYSRESET, 0);
 
        ret = gmu_poll_timeout(gmu, REG_A6XX_GMU_CM3_FW_INIT_RESULT, val,
@@ -740,6 +746,9 @@ static int a6xx_gmu_fw_start(struct a6xx_gmu *gmu, unsigned 
int state)
 
        gmu_write(gmu, REG_A6XX_GMU_HFI_SFR_ADDR, chipid);
 
+       gmu_write(gmu, REG_A6XX_GPU_GMU_CX_GMU_PWR_COL_CP_MSG,
+                 gmu->log.iova | (gmu->log.size / SZ_4K - 1));
+
        /* Set up the lowest idle level on the GMU */
        a6xx_gmu_power_config(gmu);
 
@@ -1046,6 +1055,7 @@ static void a6xx_gmu_memory_free(struct a6xx_gmu *gmu)
        msm_gem_kernel_put(gmu->icache.obj, gmu->aspace, false);
        msm_gem_kernel_put(gmu->dcache.obj, gmu->aspace, false);
        msm_gem_kernel_put(gmu->dummy.obj, gmu->aspace, false);
+       msm_gem_kernel_put(gmu->log.obj, gmu->aspace, false);
 
        gmu->aspace->mmu->funcs->detach(gmu->aspace->mmu);
        msm_gem_address_space_put(gmu->aspace);
@@ -1450,6 +1460,11 @@ int a6xx_gmu_init(struct a6xx_gpu *a6xx_gpu, struct 
device_node *node)
        if (ret)
                goto err_memory;
 
+       /* Allocate memory for the GMU log region */
+       ret = a6xx_gmu_memory_alloc(gmu, &gmu->log, SZ_4K, 0);
+       if (ret)
+               goto err_memory;
+
        /* Map the GMU registers */
        gmu->mmio = a6xx_gmu_get_mmio(pdev, "gmu");
        if (IS_ERR(gmu->mmio)) {
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h 
b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
index aed02b2b7659..be65720f32cf 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.h
@@ -61,6 +61,7 @@ struct a6xx_gmu {
        struct a6xx_gmu_bo icache;
        struct a6xx_gmu_bo dcache;
        struct a6xx_gmu_bo dummy;
+       struct a6xx_gmu_bo log;
 
        int nr_clocks;
        struct clk_bulk_data *clocks;
diff --git a/drivers/gpu/drm/msm/adreno/a6xx_gmu.xml.h 
b/drivers/gpu/drm/msm/adreno/a6xx_gmu.xml.h
index b4357ea550ec..176ae94d9fe6 100644
--- a/drivers/gpu/drm/msm/adreno/a6xx_gmu.xml.h
+++ b/drivers/gpu/drm/msm/adreno/a6xx_gmu.xml.h
@@ -205,6 +205,10 @@ static inline uint32_t A6XX_GMU_GPU_NAP_CTRL_SID(uint32_t 
val)
 
 #define REG_A6XX_GPU_GMU_CX_GMU_CX_FAL_INTF                    0x000050f0
 
+#define REG_A6XX_GPU_GMU_CX_GMU_PWR_COL_CP_MSG                 0x00005100
+
+#define REG_A6XX_GPU_GMU_CX_GMU_PWR_COL_CP_RESP                        
0x00005101
+
 #define REG_A6XX_GMU_BOOT_KMD_LM_HANDSHAKE                     0x000051f0
 
 #define REG_A6XX_GMU_LLM_GLM_SLEEP_CTRL                                
0x00005157
-- 
2.26.1

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