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wigig_sensing: do not deassert DRI on Data Ready DRI

Browse source 
This change is a performance optimization. Instead of sending a DRI
deassert command at the end of a Data Ready DRI, the FW shall get a FIFO
empty internal signal. FW sets the don't deassert bit in relevant cases,
like Data Ready DRI, or SYSASSERT DRI.

Change-Id: I810e891a82b80c256857987b446c2162bacc399e
Signed-off-by: Gidon Studinski <gidons@codeaurora.org>
Signed-off-by: Alexei Avshalom Lazar <ailizaro@codeaurora.org>
This commit is contained in:
Gidon Studinski 2019-12-03 15:27:51 +02:00 • committed by Alexei Avshalom Lazar
commit c2b73353eb
2 changed files with 14 additions and 6 deletions
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17
drivers/misc/wigig_sensing.c
View file

@ -539,12 +539,12 @@ static int wigig_sensing_ioc_change_mode(struct wigig_sensing_ctx *ctx,
}
/* Send command to FW */
mutex_lock(&ctx->dri_lock);
ctx->stm.change_mode_in_progress = true;
ch = req.has_channel ? req.channel : 0;
ctx->stm.channel_request = ch;
ctx->stm.burst_size_ready = false;
/* Change mode command must not be called during DRI processing */
mutex_lock(&ctx->dri_lock);
rc = wigig_sensing_send_change_mode_command(ctx, req.mode, ch);
mutex_unlock(&ctx->dri_lock);
if (rc) {
@ -1213,6 +1213,7 @@ static irqreturn_t wigig_sensing_dri_isr_thread(int irq, void *cookie)
u32 sanity_reg = 0;
union user_rgf_spi_mbox_inb additional_inb_command;
u8 num_retries = 0;
bool dont_deassert = false;
mutex_lock(&ctx->dri_lock);
@ -1281,6 +1282,10 @@ static irqreturn_t wigig_sensing_dri_isr_thread(int irq, void *cookie)
goto bail_out;
}
if (spi_status.b.int_dont_deassert) {
dont_deassert = true;
spi_status.v &= ~INT_DONT_DEASSERT;
}
if (spi_status.b.int_sysassert) {
enum wigig_sensing_stm_e old_state = ctx->stm.state;
@ -1356,10 +1361,12 @@ static irqreturn_t wigig_sensing_dri_isr_thread(int irq, void *cookie)
deassert_and_bail_out:
/* Notify FW we are done with interrupt handling */
rc = wigig_sensing_deassert_dri(ctx, additional_inb_command);
if (rc)
pr_err("wigig_sensing_deassert_dri() failed, rc=%d\n",
rc);
if (!dont_deassert || additional_inb_command.b.mode != 0) {
rc = wigig_sensing_deassert_dri(ctx, additional_inb_command);
if (rc)
pr_err("wigig_sensing_deassert_dri() failed, rc=%d\n",
rc);
}
bail_out:
mutex_unlock(&ctx->dri_lock);

3
drivers/misc/wigig_sensing.h
View file

@ -51,6 +51,7 @@
#define INT_FW_READY BIT(24)
#define INT_DATA_READY BIT(25)
#define INT_FIFO_READY BIT(26)
#define INT_DONT_DEASSERT BIT(27)
#define INT_SYSASSERT BIT(29)
#define INT_DEEP_SLEEP_EXIT BIT(30)
union user_rgf_spi_status {
@ -67,7 +68,7 @@ union user_rgf_spi_status {
u8 int_fw_ready:1; /* FW MBOX ready */
u8 int_data_ready:1; /* data available on FIFO */
u8 int_fifo_ready:1; /* FIFO status update */
u8 reserved2:1;
u8 int_dont_deassert:1; /* Don't deassert DRI */
u8 reserved3:1;
u8 int_sysassert:1; /* SYSASSERT occurred */
u8 int_deep_sleep_exit:1;