From: Iuliana Prodan <iuliana.prodan@xxxxxxx> Some DSP firmware requires a FW_READY signal before proceeding, while others do not. Therefore, add support to handle i.MX DSP-specific features. Implement handle_rsc callback to handle resource table parsing and to process DSP-specific resource, to determine if waiting is needed. Update imx_dsp_rproc_start() to handle this condition accordingly. Signed-off-by: Iuliana Prodan <iuliana.prodan@xxxxxxx> --- Changes in v2: - Reviews from Mathieu Poirier: - Use vendor-specific resource table entry. - Implement resource handler specific to the i.MX DSP. - Revise commit message to include recent updates. - Link to v1: https://lore.kernel.org/all/20250305123923.514386-1-iuliana.prodan@xxxxxxxxxxx/ drivers/remoteproc/imx_dsp_rproc.c | 59 +++++++++++++++++++++++++++++- 1 file changed, 57 insertions(+), 2 deletions(-) diff --git a/drivers/remoteproc/imx_dsp_rproc.c b/drivers/remoteproc/imx_dsp_rproc.c index b9bb15970966..1729bfbc602e 100644 --- a/drivers/remoteproc/imx_dsp_rproc.c +++ b/drivers/remoteproc/imx_dsp_rproc.c @@ -35,9 +35,17 @@ module_param_named(no_mailboxes, no_mailboxes, int, 0644); MODULE_PARM_DESC(no_mailboxes, "There is no mailbox between cores, so ignore remote proc reply after start, default is 0 (off)."); +/* Flag indicating that the remote is up and running */ #define REMOTE_IS_READY BIT(0) +/* Flag indicating that the host should wait for a firmware-ready response */ +#define HOST_WAIT_FW_READY BIT(1) #define REMOTE_READY_WAIT_MAX_RETRIES 500 +/* This flag is set in the DSP resource table's features field to indicate + * that the firmware requires the host to wait for a FW_READY response. + */ +#define WAIT_FW_READY BIT(0) + /* att flags */ /* DSP own area */ #define ATT_OWN BIT(31) @@ -136,6 +144,19 @@ struct imx_dsp_rproc_dcfg { int (*reset)(struct imx_dsp_rproc *priv); }; +/** + * struct fw_rsc_imx_dsp - i.MX DSP specific info + * @len: length of the resource entry + * @features: feature flags supported by the i.MX DSP firmware + * + * This represents a DSP-specific resource in the firmware's + * resource table, providing information on supported features. + */ +struct fw_rsc_imx_dsp { + uint32_t len; + uint32_t features; +}; + static const struct imx_rproc_att imx_dsp_rproc_att_imx8qm[] = { /* dev addr , sys addr , size , flags */ { 0x596e8000, 0x556e8000, 0x00008000, ATT_OWN }, @@ -300,6 +321,39 @@ static int imx_dsp_rproc_ready(struct rproc *rproc) return -ETIMEDOUT; } +/** + * imx_dsp_rproc_handle_rsc() - Handle DSP-specific resource table entries + * @rproc: remote processor instance + * @rsc_type: resource type identifier + * @rsc: pointer to the resource entry + * @offset: offset of the resource entry + * @avail: available space in the resource table + * + * Parse the DSP-specific resource entry and update flags accordingly. + * If the WAIT_FW_READY feature is set, the host must wait for the firmware + * to signal readiness before proceeding with execution. + * + * Return: RSC_HANDLED if processed successfully, RSC_IGNORED otherwise. + */ +static int imx_dsp_rproc_handle_rsc(struct rproc *rproc, u32 rsc_type, + void *rsc, int offset, int avail) +{ + struct imx_dsp_rproc *priv = rproc->priv; + struct fw_rsc_imx_dsp *imx_dsp_rsc = rsc; + + if (!imx_dsp_rsc || imx_dsp_rsc->len != sizeof(imx_dsp_rsc->features)) { + priv->flags |= HOST_WAIT_FW_READY; + return RSC_IGNORED; + } + + if (imx_dsp_rsc->features & WAIT_FW_READY) + priv->flags |= HOST_WAIT_FW_READY; + else + priv->flags &= ~HOST_WAIT_FW_READY; + + return RSC_HANDLED; +} + /* * Start function for rproc_ops * @@ -335,8 +389,8 @@ static int imx_dsp_rproc_start(struct rproc *rproc) if (ret) dev_err(dev, "Failed to enable remote core!\n"); - else - ret = imx_dsp_rproc_ready(rproc); + else if (priv->flags & HOST_WAIT_FW_READY) + return imx_dsp_rproc_ready(rproc); return ret; } @@ -936,6 +990,7 @@ static const struct rproc_ops imx_dsp_rproc_ops = { .kick = imx_dsp_rproc_kick, .load = imx_dsp_rproc_elf_load_segments, .parse_fw = imx_dsp_rproc_parse_fw, + .handle_rsc = imx_dsp_rproc_handle_rsc, .find_loaded_rsc_table = rproc_elf_find_loaded_rsc_table, .sanity_check = rproc_elf_sanity_check, .get_boot_addr = rproc_elf_get_boot_addr, -- 2.25.1
