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Diffstat (limited to 'meta-amdfalconx86/recipes-kernel/linux/files/1129-ASoC-AMD-Manage-ACP-2.x-SRAM-banks-power.patch')
-rw-r--r--meta-amdfalconx86/recipes-kernel/linux/files/1129-ASoC-AMD-Manage-ACP-2.x-SRAM-banks-power.patch190
1 files changed, 190 insertions, 0 deletions
diff --git a/meta-amdfalconx86/recipes-kernel/linux/files/1129-ASoC-AMD-Manage-ACP-2.x-SRAM-banks-power.patch b/meta-amdfalconx86/recipes-kernel/linux/files/1129-ASoC-AMD-Manage-ACP-2.x-SRAM-banks-power.patch
new file mode 100644
index 00000000..76135b6e
--- /dev/null
+++ b/meta-amdfalconx86/recipes-kernel/linux/files/1129-ASoC-AMD-Manage-ACP-2.x-SRAM-banks-power.patch
@@ -0,0 +1,190 @@
+From 21a602911b8e34e680a969e28db3f9966567612d Mon Sep 17 00:00:00 2001
+From: Maruthi Srinivas Bayyavarapu <Maruthi.Bayyavarapu@amd.com>
+Date: Mon, 21 Dec 2015 16:13:29 +0530
+Subject: [PATCH 04/17] ASoC: AMD: Manage ACP 2.x SRAM banks power
+
+ACP SRAM banks gets turned on when ACP is powered on.
+Not all banks are used for playback/capture. So, power on
+required banks during audio device open and power off during
+audio device close.
+
+Signed-off-by: Maruthi Bayyavarapu <maruthi.bayyavarapu@amd.com>
+Reviewed-by: Alex Deucher <alexander.deucher@amd.com>
+Signed-off-by: Alex Deucher <alexander.deucher@amd.com>
+Signed-off-by: Kalyan Alle <kalyan.alle@amd.com>
+---
+ sound/soc/amd/acp-pcm-dma.c | 94 +++++++++++++++++++++++++++++++++++++++++----
+ 1 file changed, 87 insertions(+), 7 deletions(-)
+
+diff --git a/sound/soc/amd/acp-pcm-dma.c b/sound/soc/amd/acp-pcm-dma.c
+index c0819b5..cc8b841 100644
+--- a/sound/soc/amd/acp-pcm-dma.c
++++ b/sound/soc/amd/acp-pcm-dma.c
+@@ -376,9 +376,57 @@ static int acp_dma_stop(void __iomem *acp_mmio, u8 ch_num)
+ return 0;
+ }
+
++static void acp_set_sram_bank_state(void __iomem *acp_mmio, u16 bank,
++ bool power_on)
++{
++ u32 val, req_reg, sts_reg, sts_reg_mask;
++ u32 loops = 1000;
++
++ if (bank < 32) {
++ req_reg = mmACP_MEM_SHUT_DOWN_REQ_LO;
++ sts_reg = mmACP_MEM_SHUT_DOWN_STS_LO;
++ sts_reg_mask = 0xFFFFFFFF;
++
++ } else {
++ bank -= 32;
++ req_reg = mmACP_MEM_SHUT_DOWN_REQ_HI;
++ sts_reg = mmACP_MEM_SHUT_DOWN_STS_HI;
++ sts_reg_mask = 0x0000FFFF;
++ }
++
++ val = acp_reg_read(acp_mmio, req_reg);
++ if (val & (1 << bank)) {
++ /* bank is in off state */
++ if (power_on == true)
++ /* request to on */
++ val &= ~(1 << bank);
++ else
++ /* request to off */
++ return;
++ } else {
++ /* bank is in on state */
++ if (power_on == false)
++ /* request to off */
++ val |= 1 << bank;
++ else
++ /* request to on */
++ return;
++ }
++ acp_reg_write(val, acp_mmio, req_reg);
++
++ while (acp_reg_read(acp_mmio, sts_reg) != sts_reg_mask) {
++ if (!loops--) {
++ pr_err("ACP SRAM bank %d state change failed\n", bank);
++ break;
++ }
++ cpu_relax();
++ }
++}
++
+ /* Initialize and bring ACP hardware to default state. */
+ static int acp_init(void __iomem *acp_mmio)
+ {
++ u16 bank;
+ u32 val, count, sram_pte_offset;
+
+ /* Assert Soft reset of ACP */
+@@ -447,6 +495,13 @@ static int acp_init(void __iomem *acp_mmio)
+ acp_reg_write(ACP_EXTERNAL_INTR_CNTL__DMAIOCMask_MASK,
+ acp_mmio, mmACP_EXTERNAL_INTR_CNTL);
+
++ /* When ACP_TILE_P1 is turned on, all SRAM banks get turned on.
++ * Now, turn off all of them. This can't be done in 'poweron' of
++ * ACP pm domain, as this requires ACP to be initialized.
++ */
++ for (bank = 1; bank < 48; bank++)
++ acp_set_sram_bank_state(acp_mmio, bank, false);
++
+ return 0;
+ }
+
+@@ -559,6 +614,7 @@ static irqreturn_t dma_irq_handler(int irq, void *arg)
+
+ static int acp_dma_open(struct snd_pcm_substream *substream)
+ {
++ u16 bank;
+ int ret = 0;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct snd_soc_pcm_runtime *prtd = substream->private_data;
+@@ -592,10 +648,17 @@ static int acp_dma_open(struct snd_pcm_substream *substream)
+ if (!intr_data->play_stream && !intr_data->capture_stream)
+ acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
+
+- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
++ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ intr_data->play_stream = substream;
+- else
++ for (bank = 1; bank <= 4; bank++)
++ acp_set_sram_bank_state(intr_data->acp_mmio, bank,
++ true);
++ } else {
+ intr_data->capture_stream = substream;
++ for (bank = 5; bank <= 8; bank++)
++ acp_set_sram_bank_state(intr_data->acp_mmio, bank,
++ true);
++ }
+
+ return 0;
+ }
+@@ -627,6 +690,7 @@ static int acp_dma_hw_params(struct snd_pcm_substream *substream,
+ pg = virt_to_page(substream->dma_buffer.area);
+
+ if (pg != NULL) {
++ acp_set_sram_bank_state(rtd->acp_mmio, 0, true);
+ /* Save for runtime private data */
+ rtd->pg = pg;
+ rtd->order = get_order(size);
+@@ -802,6 +866,7 @@ static int acp_dma_new(struct snd_soc_pcm_runtime *rtd)
+
+ static int acp_dma_close(struct snd_pcm_substream *substream)
+ {
++ u16 bank;
+ struct snd_pcm_runtime *runtime = substream->runtime;
+ struct audio_substream_data *rtd = runtime->private_data;
+ struct snd_soc_pcm_runtime *prtd = substream->private_data;
+@@ -809,10 +874,17 @@ static int acp_dma_close(struct snd_pcm_substream *substream)
+
+ kfree(rtd);
+
+- if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK)
++ if (substream->stream == SNDRV_PCM_STREAM_PLAYBACK) {
+ adata->play_stream = NULL;
+- else
++ for (bank = 1; bank <= 4; bank++)
++ acp_set_sram_bank_state(adata->acp_mmio, bank,
++ false);
++ } else {
+ adata->capture_stream = NULL;
++ for (bank = 5; bank <= 8; bank++)
++ acp_set_sram_bank_state(adata->acp_mmio, bank,
++ false);
++ }
+
+ /* Disable ACP irq, when the current stream is being closed and
+ * another stream is also not active.
+@@ -906,17 +978,25 @@ static int acp_audio_remove(struct platform_device *pdev)
+
+ static int acp_pcm_resume(struct device *dev)
+ {
++ u16 bank;
+ struct audio_drv_data *adata = dev_get_drvdata(dev);
+
+ acp_init(adata->acp_mmio);
+
+- if (adata->play_stream && adata->play_stream->runtime)
++ if (adata->play_stream && adata->play_stream->runtime) {
++ for (bank = 1; bank <= 4; bank++)
++ acp_set_sram_bank_state(adata->acp_mmio, bank,
++ true);
+ config_acp_dma(adata->acp_mmio,
+ adata->play_stream->runtime->private_data);
+- if (adata->capture_stream && adata->capture_stream->runtime)
++ }
++ if (adata->capture_stream && adata->capture_stream->runtime) {
++ for (bank = 5; bank <= 8; bank++)
++ acp_set_sram_bank_state(adata->acp_mmio, bank,
++ true);
+ config_acp_dma(adata->acp_mmio,
+ adata->capture_stream->runtime->private_data);
+-
++ }
+ acp_reg_write(1, adata->acp_mmio, mmACP_EXTERNAL_INTR_ENB);
+ return 0;
+ }
+--
+2.7.4
+
generated by cgit 1.2.3-korg (git 2.39.0) at 2024-05-04 16:17:46 +0000