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authorTimo Alho <talho@nvidia.com>2018-10-22 16:19:36 +0300
committerThierry Reding <treding@nvidia.com>2018-11-08 14:49:25 +0300
commitd78b5bde0ffc33d20f014b3ad4d7aaac8b79d34e (patch)
treedd3766d6b88c176abde694cacc7e366777571ffd /drivers/firmware
parent651022382c7f8da46cb4872a545ee1da6d097d2a (diff)
downloadlinux-d78b5bde0ffc33d20f014b3ad4d7aaac8b79d34e.tar.xz
firmware: tegra: Add helper to check for supported MRQs
Add a helper function to check that firmware is supporting a given MRQ command. Signed-off-by: Timo Alho <talho@nvidia.com> Acked-by: Sivaram Nair <sivaramn@nvidia.com> Acked-by: Jon Hunter <jonathanh@nvidia.com> Signed-off-by: Thierry Reding <treding@nvidia.com>
Diffstat (limited to 'drivers/firmware')
-rw-r--r--drivers/firmware/tegra/bpmp.c25
1 files changed, 25 insertions, 0 deletions
diff --git a/drivers/firmware/tegra/bpmp.c b/drivers/firmware/tegra/bpmp.c
index a3d5b518c10e..90c6089fed84 100644
--- a/drivers/firmware/tegra/bpmp.c
+++ b/drivers/firmware/tegra/bpmp.c
@@ -470,6 +470,31 @@ unlock:
}
EXPORT_SYMBOL_GPL(tegra_bpmp_free_mrq);
+bool tegra_bpmp_mrq_is_supported(struct tegra_bpmp *bpmp, unsigned int mrq)
+{
+ struct mrq_query_abi_request req = { .mrq = cpu_to_le32(mrq) };
+ struct mrq_query_abi_response resp;
+ struct tegra_bpmp_message msg = {
+ .mrq = MRQ_QUERY_ABI,
+ .tx = {
+ .data = &req,
+ .size = sizeof(req),
+ },
+ .rx = {
+ .data = &resp,
+ .size = sizeof(resp),
+ },
+ };
+ int ret;
+
+ ret = tegra_bpmp_transfer(bpmp, &msg);
+ if (ret || msg.rx.ret)
+ return false;
+
+ return resp.status == 0;
+}
+EXPORT_SYMBOL_GPL(tegra_bpmp_mrq_is_supported);
+
static void tegra_bpmp_mrq_handle_ping(unsigned int mrq,
struct tegra_bpmp_channel *channel,
void *data)