diff options
Diffstat (limited to 'sound/soc/intel/skylake/bxt-sst.c')
| -rw-r--r-- | sound/soc/intel/skylake/bxt-sst.c | 145 |
1 files changed, 145 insertions, 0 deletions
diff --git a/sound/soc/intel/skylake/bxt-sst.c b/sound/soc/intel/skylake/bxt-sst.c index 1d251d5..1f9f33d 100644 --- a/sound/soc/intel/skylake/bxt-sst.c +++ b/sound/soc/intel/skylake/bxt-sst.c @@ -43,6 +43,9 @@ #define BXT_ADSP_FW_BIN_HDR_OFFSET 0x2000 +/* Delay before scheduling D0i3 entry */ +#define BXT_D0I3_DELAY 5000 + static unsigned int bxt_get_errorcode(struct sst_dsp *ctx) { return sst_dsp_shim_read(ctx, BXT_ADSP_ERROR_CODE); @@ -288,6 +291,141 @@ sst_load_base_firmware_failed: return ret; } +/* + * Decide the D0i3 state that can be targeted based on the usecase + * ref counts and DSP state + * + * Decision Matrix: (X= dont care; state = target state) + * + * DSP state != SKL_DSP_RUNNING ; state = no d0i3 + * + * DSP state == SKL_DSP_RUNNING , the following matrix applies + * non_d0i3 >0; streaming =X; non_streaming =X; state = no d0i3 + * non_d0i3 =X; streaming =0; non_streaming =0; state = no d0i3 + * non_d0i3 =0; streaming >0; non_streaming =X; state = streaming d0i3 + * non_d0i3 =0; streaming =0; non_streaming =X; state = non-streaming d0i3 + */ +static int bxt_d0i3_target_state(struct sst_dsp *ctx) +{ + struct skl_sst *skl = ctx->thread_context; + struct skl_d0i3_data *d0i3 = &skl->d0i3; + + if (skl->cores.state[SKL_DSP_CORE0_ID] != SKL_DSP_RUNNING) + return SKL_DSP_D0I3_NONE; + + if (d0i3->non_d0i3) + return SKL_DSP_D0I3_NONE; + else if (d0i3->streaming) + return SKL_DSP_D0I3_STREAMING; + else if (d0i3->non_streaming) + return SKL_DSP_D0I3_NON_STREAMING; + else + return SKL_DSP_D0I3_NONE; +} + +static void bxt_set_dsp_D0i3(struct work_struct *work) +{ + int ret; + struct skl_ipc_d0ix_msg msg; + struct skl_sst *skl = container_of(work, + struct skl_sst, d0i3.work.work); + struct sst_dsp *ctx = skl->dsp; + struct skl_d0i3_data *d0i3 = &skl->d0i3; + int target_state; + + dev_dbg(ctx->dev, "In %s:\n", __func__); + + /* D0i3 entry allowed only if core 0 alone is running */ + if (skl_dsp_get_enabled_cores(ctx) != SKL_DSP_CORE0_MASK) { + dev_warn(ctx->dev, + "D0i3 allowed when only core0 running:Exit\n"); + return; + } + + target_state = bxt_d0i3_target_state(ctx); + if (target_state == SKL_DSP_D0I3_NONE) + return; + + msg.instance_id = 0; + msg.module_id = 0; + msg.wake = 1; + msg.streaming = 0; + if (target_state == SKL_DSP_D0I3_STREAMING) + msg.streaming = 1; + + ret = skl_ipc_set_d0ix(&skl->ipc, &msg); + + if (ret < 0) { + dev_err(ctx->dev, "Failed to set DSP to D0i3 state\n"); + return; + } + + /* Set Vendor specific register D0I3C.I3 to enable D0i3*/ + if (skl->update_d0i3c) + skl->update_d0i3c(skl->dev, true); + + d0i3->state = target_state; + skl->cores.state[SKL_DSP_CORE0_ID] = SKL_DSP_RUNNING_D0I3; +} + +static int bxt_schedule_dsp_D0i3(struct sst_dsp *ctx) +{ + struct skl_sst *skl = ctx->thread_context; + struct skl_d0i3_data *d0i3 = &skl->d0i3; + + /* Schedule D0i3 only if the usecase ref counts are appropriate */ + if (bxt_d0i3_target_state(ctx) != SKL_DSP_D0I3_NONE) { + + dev_dbg(ctx->dev, "%s: Schedule D0i3\n", __func__); + + schedule_delayed_work(&d0i3->work, + msecs_to_jiffies(BXT_D0I3_DELAY)); + } + + return 0; +} + +static int bxt_set_dsp_D0i0(struct sst_dsp *ctx) +{ + int ret; + struct skl_ipc_d0ix_msg msg; + struct skl_sst *skl = ctx->thread_context; + + dev_dbg(ctx->dev, "In %s:\n", __func__); + + /* First Cancel any pending attempt to put DSP to D0i3 */ + cancel_delayed_work_sync(&skl->d0i3.work); + + /* If DSP is currently in D0i3, bring it to D0i0 */ + if (skl->cores.state[SKL_DSP_CORE0_ID] != SKL_DSP_RUNNING_D0I3) + return 0; + + dev_dbg(ctx->dev, "Set DSP to D0i0\n"); + + msg.instance_id = 0; + msg.module_id = 0; + msg.streaming = 0; + msg.wake = 0; + + if (skl->d0i3.state == SKL_DSP_D0I3_STREAMING) + msg.streaming = 1; + + /* Clear Vendor specific register D0I3C.I3 to disable D0i3*/ + if (skl->update_d0i3c) + skl->update_d0i3c(skl->dev, false); + + ret = skl_ipc_set_d0ix(&skl->ipc, &msg); + if (ret < 0) { + dev_err(ctx->dev, "Failed to set DSP to D0i0\n"); + return ret; + } + + skl->cores.state[SKL_DSP_CORE0_ID] = SKL_DSP_RUNNING; + skl->d0i3.state = SKL_DSP_D0I3_NONE; + + return 0; +} + static int bxt_set_dsp_D0(struct sst_dsp *ctx, unsigned int core_id) { struct skl_sst *skl = ctx->thread_context; @@ -414,6 +552,8 @@ static int bxt_set_dsp_D3(struct sst_dsp *ctx, unsigned int core_id) static struct skl_dsp_fw_ops bxt_fw_ops = { .set_state_D0 = bxt_set_dsp_D0, .set_state_D3 = bxt_set_dsp_D3, + .set_state_D0i3 = bxt_schedule_dsp_D0i3, + .set_state_D0i0 = bxt_set_dsp_D0i0, .load_fw = bxt_load_base_firmware, .get_fw_errcode = bxt_get_errorcode, .load_library = bxt_load_library, @@ -470,10 +610,15 @@ int bxt_sst_dsp_init(struct device *dev, void __iomem *mmio_base, int irq, if (ret) return ret; + /* set the D0i3 check */ + skl->ipc.ops.check_dsp_lp_on = skl_ipc_check_D0i0; + skl->cores.count = 2; skl->boot_complete = false; init_waitqueue_head(&skl->boot_wait); skl->is_first_boot = true; + INIT_DELAYED_WORK(&skl->d0i3.work, bxt_set_dsp_D0i3); + skl->d0i3.state = SKL_DSP_D0I3_NONE; if (dsp) *dsp = skl; |
