[PATCH v3 8/9] drm/msm/a6xx: enable GMU log

[Jonathan Marek <jonathan@marek.ca>]

This is required for a650 to work.

Signed-off-by: Jonathan Marek <jonathan@marek.ca>
Reviewed-by: Jordan Crouse <jcrouse@codeaurora.org>
---
 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 c6fce994194d..aec54cde8534 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,
@@ -744,6 +750,9 @@ 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);
 
@@ -1049,6 +1058,7 @@ 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);
@@ -1453,6 +1463,11 @@ 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 e16c16bb65bf..47df4745db50 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