kernel/linux.git/drivers/mailbox, branch v5.18.2

mailbox: ti-msgmgr: Operate mailbox in polled mode during system suspend

2022-03-13T01:33:30+00:00

During the system suspend path we must set all queues to operate in polled mode as it is possible for any protocol built using this mailbox, such as TISCI, to require communication during the no irq phase of suspend, and we cannot rely on interrupts there. Polled mode is implemented by allowing the mailbox user to define an RX channel as part of the message that is sent which is what gets polled for a response. If polled mode is enabled, this will immediately be polled for a response at the end of the mailbox send_data op before returning success for the data send or timing out if no response is received. Finally, to ensure polled mode is always enabled during system suspend, iterate through all queues to set RX queues to polled mode during system suspend and disable polled mode for all in the resume handler. Signed-off-by: Dave Gerlach Signed-off-by: Jassi Brar

mailbox: ti-msgmgr: Refactor message read during interrupt handler

2022-03-13T01:33:23+00:00

Refactor the portion of code that actually reads received messages from a queue into its own function, ti_msgmgr_queue_rx_data, that is called by the interrupt handler instead of reading directly from the handler. Signed-off-by: Dave Gerlach Signed-off-by: Jassi Brar

mailbox: imx: support i.MX93 S401 MU

2022-03-13T01:31:09+00:00

Add i.MX93 S401 MU cfg Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: imx: support dual interrupts

2022-03-13T01:31:03+00:00

i.MX93 S401 MU support two interrupts: tx empty and rx full. - Introduce a new flag IMX_MU_V2_IRQ for the dual interrupt case - Update Copyright Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: imx: extend irq to an array

2022-03-13T01:30:55+00:00

To i.MX93 S401 MU, there are two interrupts: rx full and tx empty. So extend irq to an array to prepare i.MX93 S401 MU support. Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: imx: add i.MX8 SECO MU support

2022-03-13T01:27:15+00:00

i.MX8/8X SECO firmware IPC is an implementation of passing messages. But current imx-mailbox driver only support one word message, i.MX8/8X linux side firmware has to request four TX, four RX and a TXDB to support IPC to SECO firmware. This is low efficent and more interrupts triggered compared with one TX and one RX. To make SECO MU work, - parse the size of msg. - Only enable TR0/RR0 interrupt for transmit/receive message. - For TX/RX, only support one TX channel and one RX channel - For RX, support receive msg of any size, limited by hardcoded value of 30. Signed-off-by: Franck LENORMAND Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: imx: introduce rxdb callback

2022-03-13T01:27:08+00:00

Add a rxdb callback to prepare for i.MX8 SECO MU rxdb which has a different logic. Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: imx: enlarge timeout while reading/writing messages to SCFW

2022-03-13T01:26:55+00:00

Mailbox driver needs to wait and read all the words in response to a SCFW API call, else the protocol gets messed up and results in kernel hang. When the responses are longer than 3 words its possible that SCFW will take some time to fill up the rest of the words in the MU, a timeout of 100us is arbritrary and too short. While waiting for Linux to consume the first 3 words of the response SCFW can be busy doing other stuff and hence Linux needs to wait for the rest of the words. Similar restriction applies when writing messages that are longer than 3 words. This patch increases the timeout to 5secs while waiting for response or writing long messages to SCFW. Signed-off-by: Ranjani Vaidyanathan Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: imx: fix crash in resume on i.mx8ulp

2022-03-13T01:26:49+00:00

check 'priv->clk' before 'imx_mu_read()' otherwise crash happens on i.mx8ulp, since clock not enabled. Fixes: 4f0b776ef5831 ("mailbox: imx-mailbox: support i.MX8ULP MU") Reviewed-by: Jacky Bai Signed-off-by: Robin Gong Signed-off-by: Peng Fan Signed-off-by: Jassi Brar

mailbox: imx: fix wakeup failure from freeze mode

2022-03-13T01:26:42+00:00

Since IRQF_NO_SUSPEND used for imx mailbox driver, that means this irq can't be used for wakeup source so that can't wakeup from freeze mode. Add pm_system_wakeup() to wakeup from freeze mode. Fixes: b7b2796b9b31e("mailbox: imx: ONLY IPC MU needs IRQF_NO_SUSPEND flag") Reviewed-by: Jacky Bai Reviewed-by: Peng Fan Signed-off-by: Robin Gong Signed-off-by: Peng Fan Signed-off-by: Jassi Brar