From 09085d1740ef33ef9ca4404c45802342850b6e02 Mon Sep 17 00:00:00 2001 From: Robert Marko Date: Fri, 26 May 2023 14:00:45 +0200 Subject: [PATCH] ipq807x: 6.1: fix remoteproc booting In 6.1 booting the remoteprocessor that is actually running the WLAN unfortunatelly broke, so after a long time bisecting we managed to track it down to commit ("soc: qcom: mdt_loader: Always invoke PAS mem_setup"). Luckily adding back the relocation check and not making an SCM call qcom_scm_pas_mem_setup() restored the functionality. Ansuel has sent the patch upstream. Signed-off-by: Robert Marko --- ...der-Fix-unconditional-call-to-scm_pa.patch | 77 +++++++++++++++++++ 1 file changed, 77 insertions(+) create mode 100644 target/linux/ipq807x/patches-6.1/0131-soc-qcom-mdt_loader-Fix-unconditional-call-to-scm_pa.patch diff --git a/target/linux/ipq807x/patches-6.1/0131-soc-qcom-mdt_loader-Fix-unconditional-call-to-scm_pa.patch b/target/linux/ipq807x/patches-6.1/0131-soc-qcom-mdt_loader-Fix-unconditional-call-to-scm_pa.patch new file mode 100644 index 0000000000..72b38270c4 --- /dev/null +++ b/target/linux/ipq807x/patches-6.1/0131-soc-qcom-mdt_loader-Fix-unconditional-call-to-scm_pa.patch @@ -0,0 +1,77 @@ +From b8295c6eb276b60f7b75c53a9703ca8fee01eba2 Mon Sep 17 00:00:00 2001 +From: Christian Marangi +Date: Fri, 26 May 2023 13:09:17 +0200 +Subject: [PATCH] soc: qcom: mdt_loader: Fix unconditional call to + scm_pas_mem_setup + +Commit ebeb20a9cd3f ("soc: qcom: mdt_loader: Always invoke PAS +mem_setup") dropped the relocate check and made pas_mem_setup run +unconditionally. The code was later moved with commit f4e526ff7e38 +("soc: qcom: mdt_loader: Extract PAS operations") to +qcom_mdt_pas_init() effectively losing track of what was actually +done. + +The assumption that PAS mem_setup can be done anytime was effectively +wrong, with no good reason and this caused regression on some SoC +that use remoteproc to bringup ath11k. One example is IPQ8074 SoC that +effectively broke resulting in remoteproc silently die and ath11k not +working. + +On this SoC FW relocate is not enabled and PAS mem_setup was correctly +skipped in previous kernel version resulting in correct bringup and +function of remoteproc and ath11k. + +To fix the regression, reintroduce the relocate check in +qcom_mdt_pas_init() and correctly skip PAS mem_setup where relocate is +not enabled. + +Fixes: ebeb20a9cd3f ("soc: qcom: mdt_loader: Always invoke PAS mem_setup") +Reported-by: Robert Marko +Tested-by: Robert Marko +Co-developed-by: Robert Marko +Signed-off-by: Robert Marko +Signed-off-by: Christian Marangi +Cc: stable@vger.kernel.org +--- + drivers/soc/qcom/mdt_loader.c | 16 +++++++++++----- + 1 file changed, 11 insertions(+), 5 deletions(-) + +--- a/drivers/soc/qcom/mdt_loader.c ++++ b/drivers/soc/qcom/mdt_loader.c +@@ -210,6 +210,7 @@ int qcom_mdt_pas_init(struct device *dev + const struct elf32_hdr *ehdr; + phys_addr_t min_addr = PHYS_ADDR_MAX; + phys_addr_t max_addr = 0; ++ bool relocate = false; + size_t metadata_len; + void *metadata; + int ret; +@@ -224,6 +225,9 @@ int qcom_mdt_pas_init(struct device *dev + if (!mdt_phdr_valid(phdr)) + continue; + ++ if (phdr->p_flags & QCOM_MDT_RELOCATABLE) ++ relocate = true; ++ + if (phdr->p_paddr < min_addr) + min_addr = phdr->p_paddr; + +@@ -246,11 +250,13 @@ int qcom_mdt_pas_init(struct device *dev + goto out; + } + +- ret = qcom_scm_pas_mem_setup(pas_id, mem_phys, max_addr - min_addr); +- if (ret) { +- /* Unable to set up relocation */ +- dev_err(dev, "error %d setting up firmware %s\n", ret, fw_name); +- goto out; ++ if (relocate) { ++ ret = qcom_scm_pas_mem_setup(pas_id, mem_phys, max_addr - min_addr); ++ if (ret) { ++ /* Unable to set up relocation */ ++ dev_err(dev, "error %d setting up firmware %s\n", ret, fw_name); ++ goto out; ++ } + } + + out: