Hi Rohit,
On 2018-09-03 17:22, Rohit kumar wrote:
This adds Non PAS ADSP PIL driver for Qualcomm
Technologies Inc SoCs.
Added initial support for SDM845 with ADSP bootup and
shutdown operation handled from Application Processor
SubSystem(APSS).
Signed-off-by: Rohit kumar <rohitkr@xxxxxxxxxxxxxx>
---
....
+ select QCOM_MDT_LOADER
+ select QCOM_Q6V5_COMMON
+ select QCOM_RPROC_COMMON
+ help
+ Say y here to support the Peripherial Image Loader
replace Peripherial/Peripheral.
....
+#include <linux/clk.h>
+#include <linux/firmware.h>
+#include <linux/interrupt.h>
+#include <linux/kernel.h>
+#include <linux/module.h>
+#include <linux/delay.h>
+#include <linux/io.h>
+#include <linux/reset.h>
+#include <linux/iopoll.h>
+#include <linux/pm_domain.h>
+#include <linux/pm_runtime.h>
+#include <linux/regmap.h>
+#include <linux/mfd/syscon.h>
+#include <linux/of_address.h>
+#include <linux/of_device.h>
+#include <linux/platform_device.h>
+#include <linux/remoteproc.h>
+#include <linux/soc/qcom/mdt_loader.h>
+#include <linux/soc/qcom/smem.h>
+#include <linux/soc/qcom/smem_state.h>
+
The headers should be in alphabetical order.
....
+ struct reset_control *pdc_sync_reset;
+ struct reset_control *cc_lpass_restart;
+
+ struct regmap *halt_map;
+ unsigned int halt_lpass;
remove the double spaces above.
....
+ if (ret || val)
+ goto reset;
+
+ regmap_write(adsp->halt_map,
+ adsp->halt_lpass + LPASS_HALTREQ_REG, 1);
+
+ /* Wait for halt ACK from QDSP6 */
Minor nit, please remove the double spaces in the comment above.
+ timeout = jiffies + msecs_to_jiffies(ACK_TIMEOUT);
+ for (;;) {
+ ret = regmap_read(adsp->halt_map,
+ adsp->halt_lpass + LPASS_HALTACK_REG, &val);
+ if (ret || val || time_after(jiffies, timeout))
+ break;
+
+ udelay(1000);
According to Documentation/timers/timers-howto.txt please use
usleep_range()
when the delay range is between(10us - 20ms).
+ }
+
+ ret = regmap_read(adsp->halt_map,
+ adsp->halt_lpass + LPASS_MASTER_IDLE_REG, &val);
....
+ /* wait after asserting subsystem restart from AOSS */
+ udelay(200);
ditto
+
+ /* Clear the halt request for the AXIM and AHBM for Q6 */
+ regmap_write(adsp->halt_map, adsp->halt_lpass + LPASS_HALTREQ_REG,
0);
+
+ /* De-assert the LPASS PDC Reset */
+ reset_control_deassert(adsp->pdc_sync_reset);
+ /* Remove the LPASS reset */
+ reset_control_deassert(adsp->cc_lpass_restart);
+ /* wait after de-asserting subsystem restart from AOSS */
+ udelay(200);
ditto
+
+ return 0;
+}
....
+static int adsp_start(struct rproc *rproc)
+{
+ struct qcom_adsp *adsp = (struct qcom_adsp *)rproc->priv;
+ int ret;
+ unsigned int val;
+
+ qcom_q6v5_prepare(&adsp->q6v5);
+
+ ret = clk_prepare_enable(adsp->xo);
+ if (ret)
+ return ret;
please call qcom_q6v5_unprepare on clk_prepare_enable failure to
disable_irqs
+
+ dev_pm_genpd_set_performance_state(adsp->dev, INT_MAX);
+ ret = pm_runtime_get_sync(adsp->dev);
+ if (ret)
+ goto disable_xo_clk;
+
....
+static int adsp_init_reset(struct qcom_adsp *adsp)
+{
+ adsp->pdc_sync_reset = devm_reset_control_get_exclusive(adsp->dev,
+ "pdc_sync");
+ if (IS_ERR(adsp->pdc_sync_reset)) {
+ dev_err(adsp->dev, "failed to acquire pdc_sync reset\n");
+ return PTR_ERR(adsp->pdc_sync_reset);
+ }
Bjorn, should we return EPROBE_DEFER here since PDC global reset
controller can be a module?
+
+ adsp->cc_lpass_restart = devm_reset_control_get_exclusive(adsp->dev,
+ "cc_lpass");
+ if (IS_ERR(adsp->cc_lpass_restart)) {
+ dev_err(adsp->dev, "failed to acquire cc_lpass restart\n");
+ return PTR_ERR(adsp->cc_lpass_restart);
+ }
+
+ return 0;
....
+static int adsp_remove(struct platform_device *pdev)
+{
+ struct qcom_adsp *adsp = platform_get_drvdata(pdev);
+
+ rproc_del(adsp->rproc);
+
+ qcom_remove_glink_subdev(adsp->rproc, &adsp->glink_subdev);
+ qcom_remove_sysmon_subdev(adsp->sysmon);
+ qcom_remove_ssr_subdev(adsp->rproc, &adsp->ssr_subdev);
+ rproc_free(adsp->rproc);
+ pm_runtime_disable(adsp->dev);
+
rmmod of the driver resulted in the following kernel panic:
having a pm_runtime_disable after rproc_free seems to be the cause of
the kernel panic.
Please call pm_runtime_disable before rproc_free.
do_raw_spin_lock+0x28/0x118
__raw_spin_lock_irq+0x30/0x3c
__pm_runtime_disable+0x28/0xf4
adsp_remove+0x4c/0x5c [qcom_adsp_pil]
platform_drv_remove+0x28/0x50
device_release_driver_internal+0x124/0x1c8
driver_detach+0x44/0x80
bus_remove_driver+0x78/0x9c
driver_unregister+0x34/0x54
platform_driver_unregister+0x1c/0x28
cleanup_module+0x14/0x6bc [qcom_adsp_pil]
SyS_delete_module+0x1c4/0x214
+ return 0;
+}
+
+static const struct adsp_pil_data adsp_resource_init = {
+ .crash_reason_smem = 423,
+ .firmware_name = "adsp.mdt",
+ .ssr_name = "lpass",
+ .sysmon_name = "adsp",
+ .ssctl_id = 0x14,
+};
....
+module_platform_driver(adsp_pil_driver);
+MODULE_DESCRIPTION("QTi SDM845 ADSP Peripherial Image Loader");
replace QTi/QTI and Peripherial/Peripheral.
....
Also I see the following warns on stopping the adsp remoteproc, couldn't
root cause it though:
device_del+0x84/0x29c
platform_device_del+0x2c/0x88
platform_device_unregister+0x1c/0x30
of_platform_device_destroy+0x98/0xa8
device_for_each_child+0x54/0xa4
of_platform_depopulate+0x38/0x54
q6asm_remove+0x1c/0x2c
apr_device_remove+0x38/0x70
device_release_driver_internal+0x124/0x1c8
device_release_driver+0x24/0x30
bus_remove_device+0xcc/0xe4
device_del+0x1f8/0x29c
device_unregister+0x1c/0x30
apr_remove_device+0x1c/0x2c
device_for_each_child+0x54/0xa4
apr_remove+0x28/0x34
rpmsg_dev_remove+0x48/0x70
device_release_driver_internal+0x124/0x1c8
device_release_driver+0x24/0x30
bus_remove_device+0xcc/0xe4
device_del+0x1f8/0x29c
device_unregister+0x1c/0x30
qcom_glink_remove_device+0x1c/0x2c
device_for_each_child+0x54/0xa4
qcom_glink_native_remove+0x54/0x15c
qcom_glink_smem_unregister+0x1c/0x30
glink_subdev_stop+0x1c/0x2c [qcom_common]
rproc_stop+0x40/0xc0
rproc_shutdown+0x6c/0xc0
rproc_del+0x28/0xa0
adsp_remove+0x20/0x5c [qcom_adsp_pil]
platform_drv_remove+0x28/0x50
device_release_driver_internal+0x124/0x1c8
driver_detach+0x44/0x80
bus_remove_driver+0x78/0x9c
driver_unregister+0x34/0x54
platform_driver_unregister+0x1c/0x28
cleanup_module+0x14/0x6bc [qcom_adsp_pil]
SyS_delete_module+0x1c4/0x214
--
-- Sibi Sankar --
Qualcomm Innovation Center, Inc. is a member of Code Aurora Forum,
a Linux Foundation Collaborative Project.
