[PATCH 1/3] remoteproc: qcom_q6v5_mss: Add modem debug policy support

[Sibi Sankar]

Add modem debug policy support which will enable coredumps and live
debug support when the msadp firmware is present on secure devices.

Signed-off-by: Sibi Sankar <si...@codeaurora.org>
---
 drivers/remoteproc/qcom_q6v5_mss.c | 15 ++++++++++++++-
 1 file changed, 14 insertions(+), 1 deletion(-)

diff --git a/drivers/remoteproc/qcom_q6v5_mss.c 
b/drivers/remoteproc/qcom_q6v5_mss.c
index 13c6d5a72a831..95e21ed607cb9 100644
--- a/drivers/remoteproc/qcom_q6v5_mss.c
+++ b/drivers/remoteproc/qcom_q6v5_mss.c
@@ -187,6 +187,7 @@ struct q6v5 {
        phys_addr_t mba_phys;
        void *mba_region;
        size_t mba_size;
+       size_t dp_size;
 
        phys_addr_t mpss_phys;
        phys_addr_t mpss_reloc;
@@ -406,6 +407,13 @@ static int q6v5_xfer_mem_ownership(struct q6v5 *qproc, int 
*current_perm,
 static int q6v5_load(struct rproc *rproc, const struct firmware *fw)
 {
        struct q6v5 *qproc = rproc->priv;
+       const struct firmware *dp_fw;
+
+       if (!request_firmware(&dp_fw, "msadp", qproc->dev) && fw->size <= 
SZ_1M) {
+               memcpy(qproc->mba_region + SZ_1M, dp_fw->data, dp_fw->size);
+               qproc->dp_size = dp_fw->size;
+               release_firmware(dp_fw);
+       }
 
        memcpy(qproc->mba_region, fw->data, fw->size);
 
@@ -896,6 +904,10 @@ static int q6v5_mba_load(struct q6v5 *qproc)
        }
 
        writel(qproc->mba_phys, qproc->rmb_base + RMB_MBA_IMAGE_REG);
+       if (qproc->dp_size) {
+               writel(qproc->mba_phys + SZ_1M, qproc->rmb_base + 
RMB_PMI_CODE_START_REG);
+               writel(qproc->dp_size, qproc->rmb_base + 
RMB_PMI_CODE_LENGTH_REG);
+       }
 
        ret = q6v5proc_reset(qproc);
        if (ret)
@@ -1258,7 +1270,8 @@ static int q6v5_start(struct rproc *rproc)
        if (ret)
                return ret;
 
-       dev_info(qproc->dev, "MBA booted, loading mpss\n");
+       dev_info(qproc->dev, "MBA booted, debug policy %s, loading mpss\n",
+                qproc->dp_size ? "enabled" : "disabled");
 
        ret = q6v5_mpss_load(qproc);
        if (ret)
-- 
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