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remoteproc: qcom: q6v5: Add interconnect path proxy vote

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Many remoteproc instances requires that Linux casts a proxy vote for an
interconnect path during boot, until they can do it themselves. Add
support for voting for a single path.

As this is a shared problem between both PAS and MSS drivers, the path
is acquired and votes casted from the common helper code.

Signed-off-by: Bjorn Andersson <bjorn.andersson@linaro.org>
Reviewed-by: Georgi Djakov <djakov@kernel.org>
Link: https://lore.kernel.org/r/20220225033224.2238425-1-bjorn.andersson@linaro.org
This commit is contained in:
Bjorn Andersson 2022-02-24 19:32:24 -08:00
parent 80d691854f
commit 8d9be5c6bd
2 changed files with 24 additions and 2 deletions
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23
drivers/remoteproc/qcom_q6v5.c
View File

@ -8,6 +8,7 @@
*/
#include <linux/kernel.h>
#include <linux/platform_device.h>
#include <linux/interconnect.h>
#include <linux/interrupt.h>
#include <linux/module.h>
#include <linux/soc/qcom/qcom_aoss.h>
@ -51,9 +52,17 @@ int qcom_q6v5_prepare(struct qcom_q6v5 *q6v5)
{
int ret;
ret = q6v5_load_state_toggle(q6v5, true);
if (ret)
ret = icc_set_bw(q6v5->path, 0, UINT_MAX);
if (ret < 0) {
dev_err(q6v5->dev, "failed to set bandwidth request\n");
return ret;
}
ret = q6v5_load_state_toggle(q6v5, true);
if (ret) {
icc_set_bw(q6v5->path, 0, 0);
return ret;
}
reinit_completion(&q6v5->start_done);
reinit_completion(&q6v5->stop_done);
@ -78,6 +87,9 @@ int qcom_q6v5_unprepare(struct qcom_q6v5 *q6v5)
disable_irq(q6v5->handover_irq);
q6v5_load_state_toggle(q6v5, false);
/* Disable interconnect vote, in case handover never happened */
icc_set_bw(q6v5->path, 0, 0);
return !q6v5->handover_issued;
}
EXPORT_SYMBOL_GPL(qcom_q6v5_unprepare);
@ -160,6 +172,8 @@ static irqreturn_t q6v5_handover_interrupt(int irq, void *data)
if (q6v5->handover)
q6v5->handover(q6v5);
icc_set_bw(q6v5->path, 0, 0);
q6v5->handover_issued = true;
return IRQ_HANDLED;
@ -332,6 +346,11 @@ int qcom_q6v5_init(struct qcom_q6v5 *q6v5, struct platform_device *pdev,
return load_state ? -ENOMEM : -EINVAL;
}
q6v5->path = devm_of_icc_get(&pdev->dev, NULL);
if (IS_ERR(q6v5->path))
return dev_err_probe(&pdev->dev, PTR_ERR(q6v5->path),
"failed to acquire interconnect path\n");
return 0;
}
EXPORT_SYMBOL_GPL(qcom_q6v5_init);

3
drivers/remoteproc/qcom_q6v5.h
View File

@ -7,6 +7,7 @@
#include <linux/completion.h>
#include <linux/soc/qcom/qcom_aoss.h>
struct icc_path;
struct rproc;
struct qcom_smem_state;
struct qcom_sysmon;
@ -18,6 +19,8 @@ struct qcom_q6v5 {
struct qcom_smem_state *state;
struct qmp *qmp;
struct icc_path *path;
unsigned stop_bit;
int wdog_irq;