Re: [PATCH 5/9] remoteproc: mss: q6v5-mss: Add modem support on SC7280

Re: [PATCH 5/9] remoteproc: mss: q6v5-mss: Add modem support on SC7280

[Matthias Kaehlcke]

Hi Sibi,

On Fri, Jun 25, 2021 at 01:17:34AM +0530, Sibi Sankar wrote:
> Add out of reset sequence support for modem sub-system on SC7280 SoCs.
> It requires access to an additional set of qaccept registers, external
> power/clk control registers and halt vq6 register to put the modem back
> into reset.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---
>  drivers/remoteproc/qcom_q6v5_mss.c | 245 ++++++++++++++++++++++++++++++++++++-
>  1 file changed, 241 insertions(+), 4 deletions(-)
> 
> diff --git a/drivers/remoteproc/qcom_q6v5_mss.c b/drivers/remoteproc/qcom_q6v5_mss.c
> index 5d21084004cb..4e32811e0025 100644
> --- a/drivers/remoteproc/qcom_q6v5_mss.c
> +++ b/drivers/remoteproc/qcom_q6v5_mss.c
> @@ -77,6 +77,14 @@
>  
>  #define HALT_ACK_TIMEOUT_US		100000
>  
> +/* QACCEPT Register Offsets */
> +#define QACCEPT_ACCEPT_REG		0x0
> +#define QACCEPT_ACTIVE_REG		0x4
> +#define QACCEPT_DENY_REG		0x8
> +#define QACCEPT_REQ_REG			0xC
> +
> +#define QACCEPT_TIMEOUT_US		50
> +
>  /* QDSP6SS_RESET */
>  #define Q6SS_STOP_CORE			BIT(0)
>  #define Q6SS_CORE_ARES			BIT(1)
> @@ -143,6 +151,9 @@ struct rproc_hexagon_res {
>  	bool has_alt_reset;
>  	bool has_mba_logs;
>  	bool has_spare_reg;
> +	bool has_qaccept_regs;
> +	bool has_ext_cntl_regs;
> +	bool has_vq6;
>  };
>  
>  struct q6v5 {
> @@ -158,8 +169,18 @@ struct q6v5 {
>  	u32 halt_q6;
>  	u32 halt_modem;
>  	u32 halt_nc;
> +	u32 halt_vq6;
>  	u32 conn_box;
>  
> +	u32 qaccept_mdm;
> +	u32 qaccept_cx;
> +	u32 qaccept_axi;
> +
> +	u32 axim1_clk_off;
> +	u32 crypto_clk_off;
> +	u32 force_clk_on;
> +	u32 rscc_disable;
> +
>  	struct reset_control *mss_restart;
>  	struct reset_control *pdc_reset;
>  
> @@ -201,6 +222,9 @@ struct q6v5 {
>  	bool has_alt_reset;
>  	bool has_mba_logs;
>  	bool has_spare_reg;
> +	bool has_qaccept_regs;
> +	bool has_ext_cntl_regs;
> +	bool has_vq6;
>  	int mpss_perm;
>  	int mba_perm;
>  	const char *hexagon_mdt_image;
> @@ -213,6 +237,7 @@ enum {
>  	MSS_MSM8996,
>  	MSS_MSM8998,
>  	MSS_SC7180,
> +	MSS_SC7280,
>  	MSS_SDM845,
>  };
>  
> @@ -473,6 +498,12 @@ static int q6v5_reset_assert(struct q6v5 *qproc)
>  		regmap_update_bits(qproc->conn_map, qproc->conn_box,
>  				   AXI_GATING_VALID_OVERRIDE, 0);
>  		ret = reset_control_deassert(qproc->mss_restart);
> +	} else if (qproc->has_ext_cntl_regs) {
> +		regmap_write(qproc->conn_map, qproc->rscc_disable, 0);
> +		reset_control_assert(qproc->pdc_reset);
> +		reset_control_assert(qproc->mss_restart);
> +		reset_control_deassert(qproc->pdc_reset);
> +		ret = reset_control_deassert(qproc->mss_restart);
>  	} else {
>  		ret = reset_control_assert(qproc->mss_restart);
>  	}
> @@ -490,7 +521,7 @@ static int q6v5_reset_deassert(struct q6v5 *qproc)
>  		ret = reset_control_reset(qproc->mss_restart);
>  		writel(0, qproc->rmb_base + RMB_MBA_ALT_RESET);
>  		reset_control_deassert(qproc->pdc_reset);
> -	} else if (qproc->has_spare_reg) {
> +	} else if (qproc->has_spare_reg || qproc->has_ext_cntl_regs) {
>  		ret = reset_control_reset(qproc->mss_restart);
>  	} else {
>  		ret = reset_control_deassert(qproc->mss_restart);
> @@ -604,7 +635,7 @@ static int q6v5proc_reset(struct q6v5 *qproc)
>  		}
>  
>  		goto pbl_wait;
> -	} else if (qproc->version == MSS_SC7180) {
> +	} else if (qproc->version == MSS_SC7180 || qproc->version == MSS_SC7280) {
>  		val = readl(qproc->reg_base + QDSP6SS_SLEEP);
>  		val |= Q6SS_CBCR_CLKEN;
>  		writel(val, qproc->reg_base + QDSP6SS_SLEEP);
> @@ -787,6 +818,82 @@ static int q6v5proc_reset(struct q6v5 *qproc)
>  	return ret;
>  }
>  
> +static int q6v5proc_enable_qchannel(struct q6v5 *qproc, struct regmap *map, u32 offset)
> +{
> +	unsigned int val;
> +	int ret;
> +
> +	if (!qproc->has_qaccept_regs)
> +		return 0;
> +
> +	if (qproc->has_ext_cntl_regs) {
> +		regmap_write(qproc->conn_map, qproc->rscc_disable, 0);
> +		regmap_write(qproc->conn_map, qproc->force_clk_on, 1);
> +
> +		ret = regmap_read_poll_timeout(qproc->halt_map, qproc->axim1_clk_off, val,
> +					       !val, 1, Q6SS_CBCR_TIMEOUT_US);
> +		if (ret) {
> +			dev_err(qproc->dev, "failed to enable axim1 clock\n");
> +			return -ETIMEDOUT;
> +		}
> +	}
> +
> +	regmap_write(map, offset + QACCEPT_REQ_REG, 1);
> +
> +	/* Wait for accept */
> +	ret = regmap_read_poll_timeout(map, offset + QACCEPT_ACCEPT_REG, val, val, 5,
> +				       QACCEPT_TIMEOUT_US);
> +	if (ret) {
> +		dev_err(qproc->dev, "qchannel enable failed\n");
> +		return -ETIMEDOUT;
> +	}
> +
> +	return 0;
> +}
> +
> +static void q6v5proc_disable_qchannel(struct q6v5 *qproc, struct regmap *map, u32 offset)
> +{
> +	int ret;
> +	unsigned int val, retry;
> +	unsigned int nretry = 10;
> +	bool takedown_complete = false;
> +
> +	if (!qproc->has_qaccept_regs)
> +		return;
> +
> +	while (!takedown_complete && nretry) {
> +		nretry--;
> +
> +		regmap_read_poll_timeout(map, offset + QACCEPT_ACTIVE_REG, val, !val, 5,
> +					 QACCEPT_TIMEOUT_US);
> +
> +		regmap_write(map, offset + QACCEPT_REQ_REG, 0);
> +
> +		retry = 10;
> +		while (retry) {
> +			usleep_range(5, 10);
> +			retry--;
> +			ret = regmap_read(map, offset + QACCEPT_DENY_REG, &val);
> +			if (!ret && val) {
> +				regmap_write(map, offset + QACCEPT_REQ_REG, 1);
> +				break;
> +			}
> +
> +			ret = regmap_read(map, offset + QACCEPT_ACCEPT_REG, &val);
> +			if (!ret && !val) {
> +				takedown_complete = true;
> +				break;
> +			}

A bit of commentary in this branch would do no harm. From the code flow
I can guess that disabling the channel failed when QACCEPT_DENY_REG != 0,
and hence the channel is re-enabled (?) for the next try, and apparently
things are fine when QACCEPT_ACCEPT_REG is 0 after disabling the channel.
Would be good to be a bit more explicit about what all that actually
means.

> +		}
> +
> +		if (!retry)
> +			break;
> +	}
> +
> +	if (!takedown_complete)
> +		dev_err(qproc->dev, "qchannel takedown failed\n");
> +}

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Re: [PATCH 5/9] remoteproc: mss: q6v5-mss: Add modem support on SC7280

[Matthias Kaehlcke]

Hi Sibi,

On Fri, Jun 25, 2021 at 07:51:38PM +0530, Sibi Sankar wrote:
> Hey Matthias,
> Thanks for taking time to review the patch
> series.
> 
> On 2021-06-25 06:05, Matthias Kaehlcke wrote:
> > Hi Sibi,
> > 
> > On Fri, Jun 25, 2021 at 01:17:34AM +0530, Sibi Sankar wrote:
> > > Add out of reset sequence support for modem sub-system on SC7280 SoCs.
> > > It requires access to an additional set of qaccept registers, external
> > > power/clk control registers and halt vq6 register to put the modem
> > > back
> > > into reset.
> > > 
> > > Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> > > ---
> > >  drivers/remoteproc/qcom_q6v5_mss.c | 245
> > > ++++++++++++++++++++++++++++++++++++-
> > >  1 file changed, 241 insertions(+), 4 deletions(-)
> > > 
> > > diff --git a/drivers/remoteproc/qcom_q6v5_mss.c
> > > b/drivers/remoteproc/qcom_q6v5_mss.c
> > > index 5d21084004cb..4e32811e0025 100644
> > > --- a/drivers/remoteproc/qcom_q6v5_mss.c
> > > +++ b/drivers/remoteproc/qcom_q6v5_mss.c
> > > @@ -77,6 +77,14 @@
> > > 
> > >  #define HALT_ACK_TIMEOUT_US		100000
> > > 
> > > +/* QACCEPT Register Offsets */
> > > +#define QACCEPT_ACCEPT_REG		0x0
> > > +#define QACCEPT_ACTIVE_REG		0x4
> > > +#define QACCEPT_DENY_REG		0x8
> > > +#define QACCEPT_REQ_REG			0xC
> > > +
> > > +#define QACCEPT_TIMEOUT_US		50
> > > +
> > >  /* QDSP6SS_RESET */
> > >  #define Q6SS_STOP_CORE			BIT(0)
> > >  #define Q6SS_CORE_ARES			BIT(1)
> > > @@ -143,6 +151,9 @@ struct rproc_hexagon_res {
> > >  	bool has_alt_reset;
> > >  	bool has_mba_logs;
> > >  	bool has_spare_reg;
> > > +	bool has_qaccept_regs;
> > > +	bool has_ext_cntl_regs;
> > > +	bool has_vq6;
> > >  };
> > > 
> > >  struct q6v5 {
> > > @@ -158,8 +169,18 @@ struct q6v5 {
> > >  	u32 halt_q6;
> > >  	u32 halt_modem;
> > >  	u32 halt_nc;
> > > +	u32 halt_vq6;
> > >  	u32 conn_box;
> > > 
> > > +	u32 qaccept_mdm;
> > > +	u32 qaccept_cx;
> > > +	u32 qaccept_axi;
> > > +
> > > +	u32 axim1_clk_off;
> > > +	u32 crypto_clk_off;
> > > +	u32 force_clk_on;
> > > +	u32 rscc_disable;
> > > +
> > >  	struct reset_control *mss_restart;
> > >  	struct reset_control *pdc_reset;
> > > 
> > > @@ -201,6 +222,9 @@ struct q6v5 {
> > >  	bool has_alt_reset;
> > >  	bool has_mba_logs;
> > >  	bool has_spare_reg;
> > > +	bool has_qaccept_regs;
> > > +	bool has_ext_cntl_regs;
> > > +	bool has_vq6;
> > >  	int mpss_perm;
> > >  	int mba_perm;
> > >  	const char *hexagon_mdt_image;
> > > @@ -213,6 +237,7 @@ enum {
> > >  	MSS_MSM8996,
> > >  	MSS_MSM8998,
> > >  	MSS_SC7180,
> > > +	MSS_SC7280,
> > >  	MSS_SDM845,
> > >  };
> > > 
> > > @@ -473,6 +498,12 @@ static int q6v5_reset_assert(struct q6v5 *qproc)
> > >  		regmap_update_bits(qproc->conn_map, qproc->conn_box,
> > >  				   AXI_GATING_VALID_OVERRIDE, 0);
> > >  		ret = reset_control_deassert(qproc->mss_restart);
> > > +	} else if (qproc->has_ext_cntl_regs) {
> > > +		regmap_write(qproc->conn_map, qproc->rscc_disable, 0);
> > > +		reset_control_assert(qproc->pdc_reset);
> > > +		reset_control_assert(qproc->mss_restart);
> > > +		reset_control_deassert(qproc->pdc_reset);
> > > +		ret = reset_control_deassert(qproc->mss_restart);
> > >  	} else {
> > >  		ret = reset_control_assert(qproc->mss_restart);
> > >  	}
> > > @@ -490,7 +521,7 @@ static int q6v5_reset_deassert(struct q6v5 *qproc)
> > >  		ret = reset_control_reset(qproc->mss_restart);
> > >  		writel(0, qproc->rmb_base + RMB_MBA_ALT_RESET);
> > >  		reset_control_deassert(qproc->pdc_reset);
> > > -	} else if (qproc->has_spare_reg) {
> > > +	} else if (qproc->has_spare_reg || qproc->has_ext_cntl_regs) {
> > >  		ret = reset_control_reset(qproc->mss_restart);
> > >  	} else {
> > >  		ret = reset_control_deassert(qproc->mss_restart);
> > > @@ -604,7 +635,7 @@ static int q6v5proc_reset(struct q6v5 *qproc)
> > >  		}
> > > 
> > >  		goto pbl_wait;
> > > -	} else if (qproc->version == MSS_SC7180) {
> > > +	} else if (qproc->version == MSS_SC7180 || qproc->version ==
> > > MSS_SC7280) {
> > >  		val = readl(qproc->reg_base + QDSP6SS_SLEEP);
> > >  		val |= Q6SS_CBCR_CLKEN;
> > >  		writel(val, qproc->reg_base + QDSP6SS_SLEEP);
> > > @@ -787,6 +818,82 @@ static int q6v5proc_reset(struct q6v5 *qproc)
> > >  	return ret;
> > >  }
> > > 
> > > +static int q6v5proc_enable_qchannel(struct q6v5 *qproc, struct
> > > regmap *map, u32 offset)
> > > +{
> > > +	unsigned int val;
> > > +	int ret;
> > > +
> > > +	if (!qproc->has_qaccept_regs)
> > > +		return 0;
> > > +
> > > +	if (qproc->has_ext_cntl_regs) {
> > > +		regmap_write(qproc->conn_map, qproc->rscc_disable, 0);
> > > +		regmap_write(qproc->conn_map, qproc->force_clk_on, 1);
> > > +
> > > +		ret = regmap_read_poll_timeout(qproc->halt_map,
> > > qproc->axim1_clk_off, val,
> > > +					       !val, 1, Q6SS_CBCR_TIMEOUT_US);
> > > +		if (ret) {
> > > +			dev_err(qproc->dev, "failed to enable axim1 clock\n");
> > > +			return -ETIMEDOUT;
> > > +		}
> > > +	}
> > > +
> > > +	regmap_write(map, offset + QACCEPT_REQ_REG, 1);
> > > +
> > > +	/* Wait for accept */
> > > +	ret = regmap_read_poll_timeout(map, offset + QACCEPT_ACCEPT_REG,
> > > val, val, 5,
> > > +				       QACCEPT_TIMEOUT_US);
> > > +	if (ret) {
> > > +		dev_err(qproc->dev, "qchannel enable failed\n");
> > > +		return -ETIMEDOUT;
> > > +	}
> > > +
> > > +	return 0;
> > > +}
> > > +
> > > +static void q6v5proc_disable_qchannel(struct q6v5 *qproc, struct
> > > regmap *map, u32 offset)
> > > +{
> > > +	int ret;
> > > +	unsigned int val, retry;
> > > +	unsigned int nretry = 10;
> > > +	bool takedown_complete = false;
> > > +
> > > +	if (!qproc->has_qaccept_regs)
> > > +		return;
> > > +
> > > +	while (!takedown_complete && nretry) {
> > > +		nretry--;
> > > +
> > > +		regmap_read_poll_timeout(map, offset + QACCEPT_ACTIVE_REG, val,
> > > !val, 5,
> > > +					 QACCEPT_TIMEOUT_US);
> > > +
> > > +		regmap_write(map, offset + QACCEPT_REQ_REG, 0);
> 
> Sure I'll add more comments to this func.
> After lowering the request ^^ we wait
> for deny to go high or accept to go low.
> If it's the former then we do a request
> high and repeat the entire process again.
> If it's the latter then its considered
> that the takedown is success.

The above essentially is a transcript of the code into prose. For a reader
who isn't familiar with the hardware and might not have access to the
corresponding documentation the exact roles of the ACCEPT registers might
not be evident.

I was looking for something slightly higher level, a one liner here and
there might be enough. E.g. something like 'request to disable the channel
denied, re-enable it' in the loop below, if that is semantically correct.
Is there a typical reason why such a request would be denied, maybe because
the channel was busy? Also why is re-enabling actually required if the
request to disable was denied?

> Let me know if you feel any other parts of the patch requires more
comments as well.

For now it's mainly the code involving the ACCEPT registers and
_disable_channel() in particular.

> 
> > > +
> > > +		retry = 10;
> > > +		while (retry) {
> > > +			usleep_range(5, 10);
> > > +			retry--;
> > > +			ret = regmap_read(map, offset + QACCEPT_DENY_REG, &val);
> > > +			if (!ret && val) {
> > > +				regmap_write(map, offset + QACCEPT_REQ_REG, 1);
> > > +				break;
> > > +			}
> > > +
> > > +			ret = regmap_read(map, offset + QACCEPT_ACCEPT_REG, &val);
> > > +			if (!ret && !val) {
> > > +				takedown_complete = true;
> > > +				break;
> > > +			}
> > 
> > A bit of commentary in this branch would do no harm. From the code flow
> > I can guess that disabling the channel failed when QACCEPT_DENY_REG !=
> > 0,
> > and hence the channel is re-enabled (?) for the next try, and apparently
> > things are fine when QACCEPT_ACCEPT_REG is 0 after disabling the
> > channel.
> > Would be good to be a bit more explicit about what all that actually
> > means.

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Re: [PATCH 1/9] dt-bindings: remoteproc: qcom: pas: Add SC7280 MPSS support

[Matthias Kaehlcke]

On Fri, Jun 25, 2021 at 01:17:30AM +0530, Sibi Sankar wrote:
> Add MPSS PAS support for SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>

On which tree is this series based? I guess it must be the remoteproc tree
since the conversion of the binding to YAML isn't in Linus' tree yet,
however the patch doesn't apply cleanly against remoteproc/for-next:

  patching file Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml
  Hunk #2 succeeded at 144 (offset -4 lines).
  Hunk #3 succeeded at 285 (offset -4 lines).
  Hunk #4 succeeded at 416 with fuzz 2 (offset 23 lines).
  Hunk #5 succeeded at 492 (offset 25 lines).
  Hunk #6 FAILED at 485.

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Re: [PATCH 1/9] dt-bindings: remoteproc: qcom: pas: Add SC7280 MPSS support

[Matthias Kaehlcke]

On Fri, Jun 25, 2021 at 10:58:45PM +0530, Sibi Sankar wrote:
> On 2021-06-25 22:42, Matthias Kaehlcke wrote:
> > On Fri, Jun 25, 2021 at 01:17:30AM +0530, Sibi Sankar wrote:
> > > Add MPSS PAS support for SC7280 SoCs.
> > > 
> > > Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> > 
> > On which tree is this series based? I guess it must be the remoteproc
> > tree
> > since the conversion of the binding to YAML isn't in Linus' tree yet,
> > however the patch doesn't apply cleanly against remoteproc/for-next:
> > 
> >   patching file
> > Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml
> >   Hunk #2 succeeded at 144 (offset -4 lines).
> >   Hunk #3 succeeded at 285 (offset -4 lines).
> >   Hunk #4 succeeded at 416 with fuzz 2 (offset 23 lines).
> >   Hunk #5 succeeded at 492 (offset 25 lines).
> >   Hunk #6 FAILED at 485.
> 
> https://patchwork.kernel.org/project/linux-arm-msm/cover/1624560727-6870-1-git-send-email-sibis@codeaurora.org/
> 
> sry for wasting your time I missed
> mentioning that it was dependent on
> ^^ series.

Ah, thanks!

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>

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Re: [PATCH 1/9] dt-bindings: remoteproc: qcom: pas: Add SC7280 MPSS support

[Rob Herring]

On Fri, 25 Jun 2021 01:17:30 +0530, Sibi Sankar wrote:
> Add MPSS PAS support for SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---
>  Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml | 6 ++++++
>  1 file changed, 6 insertions(+)
> 

Acked-by: Rob Herring <robh@kernel.org>

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Re: [PATCH 2/9] remoteproc: qcom: pas: Add SC7280 Modem support

[Matthias Kaehlcke]

On Fri, Jun 25, 2021 at 01:17:31AM +0530, Sibi Sankar wrote:
> Add support for booting the Modem DSP found on QTI SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>

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Re: [PATCH 3/9] dt-bindings: remoteproc: qcom: Add Q6V5 Modem PIL binding

[Matthias Kaehlcke]

On Fri, Jun 25, 2021 at 01:17:32AM +0530, Sibi Sankar wrote:
> Add a new modem compatible string for QTI SC7280 SoCs and introduce the
> "qcom,ext-regs" and "qcom,qaccept-regs" bindings needed by the modem
> sub-system running on SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---
>  .../devicetree/bindings/remoteproc/qcom,q6v5.txt   | 32 ++++++++++++++++++++--
>  1 file changed, 30 insertions(+), 2 deletions(-)
> 
> diff --git a/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt b/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
> index 494257010629..d802e57701b8 100644
> --- a/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
> +++ b/Documentation/devicetree/bindings/remoteproc/qcom,q6v5.txt
>
> ...
>
> @@ -208,6 +218,24 @@ For the compatible strings below the following phandle references are required:
>  		    by the offset within syscon for conn_box_spare0 register
>  		    used by the modem sub-system running on SC7180 SoC.
>  
> +For the compatible strings below the following phandle references are required:
> +  "qcom,sc7280-mss-pil"
> +- qcom,ext-regs:
> +	Usage: required
> +	Value type: <prop-encoded-array>
> +	Definition: two phandles reference to syscons representing TCSR_REG and

s/phandles reference/phandle references/

> +		    TCSR register space followed by the two offset within the syscon

s/offset/offsets/

> +		    to force_clk_en/rscc_disable and axim1_clk_off/crypto_clk_off
> +		    registers respectively.

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Re: [PATCH 3/9] dt-bindings: remoteproc: qcom: Add Q6V5 Modem PIL binding

[Rob Herring]

On Fri, 25 Jun 2021 01:17:32 +0530, Sibi Sankar wrote:
> Add a new modem compatible string for QTI SC7280 SoCs and introduce the
> "qcom,ext-regs" and "qcom,qaccept-regs" bindings needed by the modem
> sub-system running on SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---
>  .../devicetree/bindings/remoteproc/qcom,q6v5.txt   | 32 ++++++++++++++++++++--
>  1 file changed, 30 insertions(+), 2 deletions(-)
> 

Acked-by: Rob Herring <robh@kernel.org>

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Re: [PATCH 6/9] arm64: dts: qcom: sc7280: Update reserved memory map

[Matthias Kaehlcke]

On Fri, Jun 25, 2021 at 01:17:35AM +0530, Sibi Sankar wrote:

> Subject: arm64: dts: qcom: sc7280: Update reserved memory map

That's very vague. Also personally I'm not a fan of patches that touch
SoC and board files with a commit message that only mentions the SoC, as
is frequently done for IDP boards. Why not split this in (at least) two,
one for adding the missing memory regions to the SoC, and one for the
IDP.

> Add missing regions and remove unused regions from the reserved memory
> map, as described in version 1.

What is this 'version 1'?


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Re: [PATCH 6/9] arm64: dts: qcom: sc7280: Update reserved memory map

[Bjorn Andersson]

On Wed 30 Jun 15:02 CDT 2021, Sibi Sankar wrote:

> On 2021-06-28 23:41, Matthias Kaehlcke wrote:
> > On Fri, Jun 25, 2021 at 01:17:35AM +0530, Sibi Sankar wrote:
> > 
> > > Subject: arm64: dts: qcom: sc7280: Update reserved memory map
> > 
> > That's very vague. Also personally I'm not a fan of patches that touch
> > SoC and board files with a commit message that only mentions the SoC, as
> > is frequently done for IDP boards. Why not split this in (at least) two,
> > one for adding the missing memory regions to the SoC, and one for the
> > IDP.
> > 
> 
> sure will split this up.
> 
> > > Add missing regions and remove unused regions from the reserved memory
> > > map, as described in version 1.
> > 
> > What is this 'version 1'?
> 
> lol, it's the memory map version number
> and it's not entirely internal to qc so
> we have been mentioning them in commit
> messages from older SoCs. I'll just drop
> it when I re-spin the series since it
> doesn't add much value.
> 

Every now and then we run into issues with the reserved-memory layout,
where knowing were the numbers comes from is useful information to have
in order to characterize the issue and come up with a fix.

So including information about where those numbers came from is useful,
even if it's referencing a version of a document that's not public.

Regards,
Bjorn

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Re: [PATCH 8/9] arm64: dts: qcom: sc7280: Add Q6V5 MSS node

[Matthias Kaehlcke]

On Fri, Jun 25, 2021 at 01:17:37AM +0530, Sibi Sankar wrote:
> This patch adds Q6V5 MSS PAS remoteproc node for SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---
>  arch/arm64/boot/dts/qcom/sc7280.dtsi | 40 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 40 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3fb6a6ef39f8..56ea172f641f 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -584,6 +584,46 @@
>  			#power-domain-cells = <1>;
>  		};
>  
> +		remoteproc_mpss: remoteproc@4080000 {
> +			compatible = "qcom,sc7280-mpss-pas";
> +			reg = <0 0x04080000 0 0x10000>;
> +
> +			interrupts-extended = <&intc GIC_SPI 264 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,

looks like this patch/series depends on "Enable miscellaneous hardware
blocks to boot WPSS" (https://patchwork.kernel.org/project/linux-arm-msm/list/?series=475089)
which is not mentioned.

> +					      <&modem_smp2p_in 1 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 2 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 3 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 7 IRQ_TYPE_EDGE_RISING>;
> +			interrupt-names = "wdog", "fatal", "ready", "handover",
> +					  "stop-ack", "shutdown-ack";
> +
> +			clocks = <&rpmhcc RPMH_CXO_CLK>;
> +			clock-names = "xo";
> +
> +			power-domains = <&rpmhpd SC7280_CX>,
> +					<&rpmhpd SC7280_MSS>;
> +			power-domain-names = "cx", "mss";
> +
> +			memory-region = <&mpss_mem>;
> +
> +			qcom,qmp = <&aoss_qmp>;
> +
> +			qcom,smem-states = <&modem_smp2p_out 0>;
> +			qcom,smem-state-names = "stop";
> +
> +			status = "disabled";
> +
> +			glink-edge {
> +				interrupts-extended = <&ipcc IPCC_CLIENT_MPSS
> +							     IPCC_MPROC_SIGNAL_GLINK_QMP
> +							     IRQ_TYPE_EDGE_RISING>;
> +				mboxes = <&ipcc IPCC_CLIENT_MPSS
> +						IPCC_MPROC_SIGNAL_GLINK_QMP>;
> +				label = "modem";
> +				qcom,remote-pid = <1>;
> +			};
> +		};
> +
>  		stm@6002000 {
>  			compatible = "arm,coresight-stm", "arm,primecell";
>  			reg = <0 0x06002000 0 0x1000>,

Reviewed-by: Matthias Kaehlcke <mka@chromium.org>

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Re: [PATCH 8/9] arm64: dts: qcom: sc7280: Add Q6V5 MSS node

[Bjorn Andersson]

On Thu 24 Jun 14:47 CDT 2021, Sibi Sankar wrote:

> This patch adds Q6V5 MSS PAS remoteproc node for SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>

Reviewed-by: Bjorn Andersson <bjorn.andersson@linaro.org>

Regards,
Bjorn

> ---
>  arch/arm64/boot/dts/qcom/sc7280.dtsi | 40 ++++++++++++++++++++++++++++++++++++
>  1 file changed, 40 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 3fb6a6ef39f8..56ea172f641f 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -584,6 +584,46 @@
>  			#power-domain-cells = <1>;
>  		};
>  
> +		remoteproc_mpss: remoteproc@4080000 {
> +			compatible = "qcom,sc7280-mpss-pas";
> +			reg = <0 0x04080000 0 0x10000>;
> +
> +			interrupts-extended = <&intc GIC_SPI 264 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 1 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 2 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 3 IRQ_TYPE_EDGE_RISING>,
> +					      <&modem_smp2p_in 7 IRQ_TYPE_EDGE_RISING>;
> +			interrupt-names = "wdog", "fatal", "ready", "handover",
> +					  "stop-ack", "shutdown-ack";
> +
> +			clocks = <&rpmhcc RPMH_CXO_CLK>;
> +			clock-names = "xo";
> +
> +			power-domains = <&rpmhpd SC7280_CX>,
> +					<&rpmhpd SC7280_MSS>;
> +			power-domain-names = "cx", "mss";
> +
> +			memory-region = <&mpss_mem>;
> +
> +			qcom,qmp = <&aoss_qmp>;
> +
> +			qcom,smem-states = <&modem_smp2p_out 0>;
> +			qcom,smem-state-names = "stop";
> +
> +			status = "disabled";
> +
> +			glink-edge {
> +				interrupts-extended = <&ipcc IPCC_CLIENT_MPSS
> +							     IPCC_MPROC_SIGNAL_GLINK_QMP
> +							     IRQ_TYPE_EDGE_RISING>;
> +				mboxes = <&ipcc IPCC_CLIENT_MPSS
> +						IPCC_MPROC_SIGNAL_GLINK_QMP>;
> +				label = "modem";
> +				qcom,remote-pid = <1>;
> +			};
> +		};
> +
>  		stm@6002000 {
>  			compatible = "arm,coresight-stm", "arm,primecell";
>  			reg = <0 0x06002000 0 0x1000>,
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

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Re: [PATCH 9/9] arm64: dts: qcom: sc7280: Update Q6V5 MSS node

[Matthias Kaehlcke]

On Fri, Jun 25, 2021 at 01:17:38AM +0530, Sibi Sankar wrote:
> Update MSS node to support MSA based modem boot on SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---
>  arch/arm64/boot/dts/qcom/sc7280-idp.dts |  7 +++++++
>  arch/arm64/boot/dts/qcom/sc7280.dtsi    | 19 ++++++++++++++++---
>  2 files changed, 23 insertions(+), 3 deletions(-)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dts b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> index 191e8a92d153..d66e3ca42ad5 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> @@ -343,3 +343,10 @@
>  		bias-pull-up;
>  	};
>  };
> +
> +&remoteproc_mpss {
> +	status = "okay";
> +	compatible = "qcom,sc7280-mss-pil";
> +	iommus = <&apps_smmu 0x124 0x0>, <&apps_smmu 0x488 0x7>;
> +	memory-region = <&mba_mem &mpss_mem>;
> +};
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 56ea172f641f..6d3687744440 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -586,7 +586,8 @@
>  
>  		remoteproc_mpss: remoteproc@4080000 {
>  			compatible = "qcom,sc7280-mpss-pas";
> -			reg = <0 0x04080000 0 0x10000>;
> +			reg = <0 0x04080000 0 0x10000>, <0 0x04180000 0 0x48>;
> +			reg-names = "qdsp6", "rmb";

Binding needs update?

Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml:

  reg:
      maxItems: 1

>  
>  			interrupts-extended = <&intc GIC_SPI 264 IRQ_TYPE_EDGE_RISING>,
>  					      <&modem_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,
> @@ -597,8 +598,11 @@
>  			interrupt-names = "wdog", "fatal", "ready", "handover",
>  					  "stop-ack", "shutdown-ack";
>  
> -			clocks = <&rpmhcc RPMH_CXO_CLK>;
> -			clock-names = "xo";
> +			clocks = <&gcc GCC_MSS_CFG_AHB_CLK>,
> +				 <&gcc GCC_MSS_OFFLINE_AXI_CLK>,
> +				 <&gcc GCC_MSS_SNOC_AXI_CLK>,
> +				 <&rpmhcc RPMH_CXO_CLK>;
> +			clock-names = "iface", "offline", "snoc_axi", "xo";

Binding needs update?

Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml:

  clocks:
    items:
      - description: XO clock
  clock-names:
    items:
      - const: xo

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Re: [PATCH 9/9] arm64: dts: qcom: sc7280: Update Q6V5 MSS node

[Bjorn Andersson]

On Wed 30 Jun 15:08 CDT 2021, Sibi Sankar wrote:

> On 2021-06-29 00:35, Matthias Kaehlcke wrote:
> > On Fri, Jun 25, 2021 at 01:17:38AM +0530, Sibi Sankar wrote:
> > > Update MSS node to support MSA based modem boot on SC7280 SoCs.
> > > 
> > > Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> > > ---
> > >  arch/arm64/boot/dts/qcom/sc7280-idp.dts |  7 +++++++
> > >  arch/arm64/boot/dts/qcom/sc7280.dtsi    | 19 ++++++++++++++++---
> > >  2 files changed, 23 insertions(+), 3 deletions(-)
> > > 
> > > diff --git a/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> > > b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> > > index 191e8a92d153..d66e3ca42ad5 100644
> > > --- a/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> > > +++ b/arch/arm64/boot/dts/qcom/sc7280-idp.dts
> > > @@ -343,3 +343,10 @@
> > >  		bias-pull-up;
> > >  	};
> > >  };
> > > +
> > > +&remoteproc_mpss {
> > > +	status = "okay";
> > > +	compatible = "qcom,sc7280-mss-pil";
> > > +	iommus = <&apps_smmu 0x124 0x0>, <&apps_smmu 0x488 0x7>;
> > > +	memory-region = <&mba_mem &mpss_mem>;
> > > +};
> > > diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > > b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > > index 56ea172f641f..6d3687744440 100644
> > > --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > > +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> > > @@ -586,7 +586,8 @@
> > > 
> > >  		remoteproc_mpss: remoteproc@4080000 {
> > >  			compatible = "qcom,sc7280-mpss-pas";
> > > -			reg = <0 0x04080000 0 0x10000>;
> > > +			reg = <0 0x04080000 0 0x10000>, <0 0x04180000 0 0x48>;
> > > +			reg-names = "qdsp6", "rmb";
> > 
> > Binding needs update?
> > 
> > Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml:
> > 
> >   reg:
> >       maxItems: 1
> > 
> > > 
> > >  			interrupts-extended = <&intc GIC_SPI 264 IRQ_TYPE_EDGE_RISING>,
> > >  					      <&modem_smp2p_in 0 IRQ_TYPE_EDGE_RISING>,
> > > @@ -597,8 +598,11 @@
> > >  			interrupt-names = "wdog", "fatal", "ready", "handover",
> > >  					  "stop-ack", "shutdown-ack";
> > > 
> > > -			clocks = <&rpmhcc RPMH_CXO_CLK>;
> > > -			clock-names = "xo";
> > > +			clocks = <&gcc GCC_MSS_CFG_AHB_CLK>,
> > > +				 <&gcc GCC_MSS_OFFLINE_AXI_CLK>,
> > > +				 <&gcc GCC_MSS_SNOC_AXI_CLK>,
> > > +				 <&rpmhcc RPMH_CXO_CLK>;
> > > +			clock-names = "iface", "offline", "snoc_axi", "xo";
> > 
> > Binding needs update?
> > 
> > Documentation/devicetree/bindings/remoteproc/qcom,adsp.yaml:
> > 
> >   clocks:
> >     items:
> >       - description: XO clock
> >   clock-names:
> >     items:
> >       - const: xo
> 
> qcom,sc7280-mpss-pas compatible requires
> just the xo clock and one reg space whereas
> the qcom,sc7280-mss-pil compatible requires
> the additional clks and reg spaces. We just
> overload properties where re-use is possible
> across boards. Hence it would be wrong to
> list those clks/reg spaces as requirements
> for the pas compatible.
> 

Our decision to describe the platform node as a superset of the
resources needed by the pas and pil variants was never reflected in the
DT bindings; resulting in the issue that the superset doesn't validate
against the pas binding and both bindings are full of platform-specific
conditionals.

To resolve the two issues I think we should split the current binding(s)
in a set of platform-centric bindings, that captures the idea of
describing the superset.

To reduce the duplication - that already exists between the two
bindings - I think we should break those out in a common part.


I'm however fine with not delaying this series further, if we agree that
the end result matches what we would put in a combined qcom,sc7280-mpss
binding.

Regards,
Bjorn

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Re: [PATCH 0/9] Add Modem support on SC7280 SoCs

[Pavel Machek]

Hi!

> This patch series adds support for booting the Modem Q6 DSP found on
> Qualcomm's SC7280 SoCs.

Am I right this is phone related? Can I get you to cc phone-devel mailing list?

Best regards,
									Pavel

-- 
(english) http://www.livejournal.com/~pavelmachek
(cesky, pictures) http://atrey.karlin.mff.cuni.cz/~pavel/picture/horses/blog.html

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Re: [PATCH 7/9] arm64: dts: qcom: sc7280: Add nodes to boot modem

[Bjorn Andersson]

On Thu 24 Jun 14:47 CDT 2021, Sibi Sankar wrote:

> Add miscellaneous nodes to boot the modem and support post-mortem debug
> on SC7280 SoCs.
> 
> Signed-off-by: Sibi Sankar <sibis@codeaurora.org>
> ---
>  arch/arm64/boot/dts/qcom/sc7280.dtsi | 20 ++++++++++++++++++++
>  1 file changed, 20 insertions(+)
> 
> diff --git a/arch/arm64/boot/dts/qcom/sc7280.dtsi b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> index 5ed7a511bfc9..3fb6a6ef39f8 100644
> --- a/arch/arm64/boot/dts/qcom/sc7280.dtsi
> +++ b/arch/arm64/boot/dts/qcom/sc7280.dtsi
> @@ -547,6 +547,11 @@
>  			#hwlock-cells = <1>;
>  		};
>  
> +		tcsr_regs: syscon@1fc0000 {

Is there a different "tcsr"? Does the "_regs" suffix add any value?

> +			compatible = "syscon";

Rob has pointed out a few times that a lone "syscon" isn't going to be
accepted going forward. Could you also add a qualifying
"qcom,sc7280-tcsr" or something like that?

> +			reg = <0 0x01fc0000 0 0x30000>;
> +		};
> +
>  		lpasscc: lpasscc@3000000 {
>  			compatible = "qcom,sc7280-lpasscc";
>  			reg = <0 0x03000000 0 0x40>,
> @@ -1219,6 +1224,21 @@
>  			};
>  		};
>  
> +		imem@146aa000 {
> +			compatible = "syscon", "simple-mfd";

As above "qcom,sc7280-imem"?

I presume we need some new binding documents for these two though,
perhaps you can add the specific compatibles and we agree that one of us
will write these two bindings soon?

Regards,
Bjorn

> +			reg = <0 0x146aa000 0 0x2000>;
> +
> +			#address-cells = <2>;
> +			#size-cells = <2>;
> +
> +			ranges = <0 0x0 0 0x146aa000 0 0x2000>;
> +
> +			pil-reloc@94c {
> +				compatible = "qcom,pil-reloc-info";
> +				reg = <0 0x94c 0 0xc8>;
> +			};
> +		};
> +
>  		apps_smmu: iommu@15000000 {
>  			compatible = "qcom,sc7280-smmu-500", "arm,mmu-500";
>  			reg = <0 0x15000000 0 0x100000>;
> -- 
> The Qualcomm Innovation Center, Inc. is a member of the Code Aurora Forum,
> a Linux Foundation Collaborative Project
> 

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