media: venus: hfi: Add 6xx AXI halt logic

This patch takes the downstream AXI halt routine and applies it when
IS_V6() is true.

bod: Converted to readl_poll_timeout()
     Removed poll timeout for LPI register, testing showed the value
     would always timeout and work, so the polling did nothing of value.
Signed-off-by: Dikshita Agarwal <dikshita@codeaurora.org>
Co-developed-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Bryan O'Donoghue <bryan.odonoghue@linaro.org>
Signed-off-by: Stanimir Varbanov <stanimir.varbanov@linaro.org>
Signed-off-by: Mauro Carvalho Chehab <mchehab+huawei@kernel.org>

drivers/media/platform/qcom/venus/hfi_venus.c

@@ -541,10 +541,42 @@ static int venus_halt_axi(struct venus_hfi_device *hdev)
 {
 	void __iomem *wrapper_base = hdev->core->wrapper_base;
 	void __iomem *vbif_base = hdev->core->vbif_base;
+	void __iomem *cpu_cs_base = hdev->core->cpu_cs_base;
+	void __iomem *aon_base = hdev->core->aon_base;
 	struct device *dev = hdev->core->dev;
 	u32 val;
+	u32 mask_val;
 	int ret;
 
+	if (IS_V6(hdev->core)) {
+		writel(0x3, cpu_cs_base + CPU_CS_X2RPMH_V6);
+
+		writel(0x1, aon_base + AON_WRAPPER_MVP_NOC_LPI_CONTROL);
+		ret = readl_poll_timeout(aon_base + AON_WRAPPER_MVP_NOC_LPI_STATUS,
+					 val,
+					 val & BIT(0),
+					 POLL_INTERVAL_US,
+					 VBIF_AXI_HALT_ACK_TIMEOUT_US);
+		if (ret)
+			return -ETIMEDOUT;
+
+		mask_val = (BIT(2) | BIT(1) | BIT(0));
+		writel(mask_val, wrapper_base + WRAPPER_DEBUG_BRIDGE_LPI_CONTROL_V6);
+
+		writel(0x00, wrapper_base + WRAPPER_DEBUG_BRIDGE_LPI_CONTROL_V6);
+		ret = readl_poll_timeout(wrapper_base + WRAPPER_DEBUG_BRIDGE_LPI_STATUS_V6,
+					 val,
+					 val == 0,
+					 POLL_INTERVAL_US,
+					 VBIF_AXI_HALT_ACK_TIMEOUT_US);
+
+		if (ret) {
+			dev_err(dev, "DBLP Release: lpi_status %x\n", val);
+			return -ETIMEDOUT;
+		}
+		return 0;
+	}
+
 	if (IS_V4(hdev->core)) {
 		val = readl(wrapper_base + WRAPPER_CPU_AXI_HALT);
 		val |= WRAPPER_CPU_AXI_HALT_HALT;