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The duration field of ddr stats will get populated only if QMP command is sent. Add support to send ddr stats freqsync QMP command. Signed-off-by: Maulik Shah --- drivers/soc/qcom/qcom_stats.c | 30 +++++++++++++++++++++++++++++- 1 file changed, 29 insertions(+), 1 deletion(-) diff --git a/drivers/soc/qcom/qcom_stats.c b/drivers/soc/qcom/qcom_stats.c index ee11fb0919742454d40442112787c087ba8f6598..15bdb8e6a542bbab34f788ac4270f7759ca83e3c 100644 --- a/drivers/soc/qcom/qcom_stats.c +++ b/drivers/soc/qcom/qcom_stats.c @@ -13,6 +13,7 @@ #include #include +#include #include #include @@ -37,6 +38,8 @@ #define DDR_STATS_TYPE(data) FIELD_GET(GENMASK(15, 8), data) #define DDR_STATS_FREQ(data) FIELD_GET(GENMASK(31, 16), data) +static struct qmp *qcom_stats_qmp; + struct subsystem_data { const char *name; u32 smem_item; @@ -188,12 +191,28 @@ static int qcom_ddr_stats_show(struct seq_file *s, void *d) struct ddr_stats_entry data[DDR_STATS_MAX_NUM_MODES]; void __iomem *reg = (void __iomem *)s->private; u32 entry_count; - int i; + int i, ret; entry_count = readl_relaxed(reg + DDR_STATS_NUM_MODES_ADDR); if (entry_count > DDR_STATS_MAX_NUM_MODES) return 0; + if (qcom_stats_qmp) { + /* + * Recent SoCs (SM8450 onwards) do not have duration field + * populated from boot up onwards for both DDR LPM Stats + * and DDR Frequency Stats. + * + * Send QMP message to Always on processor which will + * populate duration field into MSG RAM area. + * + * Sent everytime to read latest data. + */ + ret = qmp_send(qcom_stats_qmp, "{class: ddr, action: freqsync}"); + if (ret) + seq_printf(s, "Error updating duration field %d\n", ret); + } + reg += DDR_STATS_ENTRY_START_ADDR; memcpy_fromio(data, reg, sizeof(struct ddr_stats_entry) * entry_count); @@ -310,6 +329,15 @@ static int qcom_stats_probe(struct platform_device *pdev) qcom_create_subsystem_stat_files(root, config); qcom_create_soc_sleep_stat_files(root, reg, d, config); qcom_create_ddr_stat_files(root, reg, config); + /* + * QMP is used for DDR stats syncing to MSG RAM for certain SoCs having + * (SM8450 onwards). The prior SoCs do not need QMP handle as the required + * stats are already present in MSG RAM, provided the DDR_STATS_MAGIC_KEY + * matches. + */ + qcom_stats_qmp = qmp_get(&pdev->dev); + if (IS_ERR(qcom_stats_qmp)) + qcom_stats_qmp = NULL; platform_set_drvdata(pdev, root);