| Message ID | 1516699369-3513-5-git-send-email-pdeschrijver@nvidia.com |
|---|---|
| State | Superseded |
| Headers | show |
| Series | MBIST work around (WAR) for Tegra210 | expand |
On 23/01/18 09:22, Peter De Schrijver wrote: > Apply the memory built-in self test work around when ungating certain > Tegra210 power domains. Nit-pick .. typo in $subject. > Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> > --- > drivers/soc/tegra/pmc.c | 5 +++++ > 1 file changed, 5 insertions(+) > > diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c > index ce62a47..c4eff4b 100644 > --- a/drivers/soc/tegra/pmc.c > +++ b/drivers/soc/tegra/pmc.c > @@ -153,6 +153,7 @@ struct tegra_pmc_soc { > > bool has_tsense_reset; > bool has_gpu_clamps; > + bool needs_mbist_war; > > const struct tegra_io_pad_soc *io_pads; > unsigned int num_io_pads; > @@ -431,6 +432,9 @@ static int tegra_powergate_power_up(struct tegra_powergate *pg, > > usleep_range(10, 20); > > + if (pg->pmc->soc->needs_mbist_war) > + tegra210_clk_handle_mbist_war(pg->id); > + Be good if we could return an error from the above function. > if (disable_clocks) > tegra_powergate_disable_clocks(pg); > > @@ -1815,6 +1819,7 @@ static void tegra20_pmc_setup_irq_polarity(struct tegra_pmc *pmc, > .cpu_powergates = tegra210_cpu_powergates, > .has_tsense_reset = true, > .has_gpu_clamps = true, > + .needs_mbist_war = true, > .num_io_pads = ARRAY_SIZE(tegra210_io_pads), > .io_pads = tegra210_io_pads, > .regs = &tegra20_pmc_regs, > Otherwise looks good to me. Cheers Jon
On Wed, Jan 24, 2018 at 10:43:45PM +0000, Jon Hunter wrote: > > On 23/01/18 09:22, Peter De Schrijver wrote: > > Apply the memory built-in self test work around when ungating certain > > Tegra210 power domains. > > Nit-pick .. typo in $subject. > > > Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> > > --- > > drivers/soc/tegra/pmc.c | 5 +++++ > > 1 file changed, 5 insertions(+) > > > > diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c > > index ce62a47..c4eff4b 100644 > > --- a/drivers/soc/tegra/pmc.c > > +++ b/drivers/soc/tegra/pmc.c > > @@ -153,6 +153,7 @@ struct tegra_pmc_soc { > > > > bool has_tsense_reset; > > bool has_gpu_clamps; > > + bool needs_mbist_war; > > > > const struct tegra_io_pad_soc *io_pads; > > unsigned int num_io_pads; > > @@ -431,6 +432,9 @@ static int tegra_powergate_power_up(struct tegra_powergate *pg, > > > > usleep_range(10, 20); > > > > + if (pg->pmc->soc->needs_mbist_war) > > + tegra210_clk_handle_mbist_war(pg->id); > > + > > Be good if we could return an error from the above function. > We need to also undo whatever we did before then. > > if (disable_clocks) > > tegra_powergate_disable_clocks(pg); > > > > @@ -1815,6 +1819,7 @@ static void tegra20_pmc_setup_irq_polarity(struct tegra_pmc *pmc, > > .cpu_powergates = tegra210_cpu_powergates, > > .has_tsense_reset = true, > > .has_gpu_clamps = true, > > + .needs_mbist_war = true, > > .num_io_pads = ARRAY_SIZE(tegra210_io_pads), > > .io_pads = tegra210_io_pads, > > .regs = &tegra20_pmc_regs, > > > > Otherwise looks good to me. > > Cheers > Jon > > -- > nvpublic -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 25/01/18 10:06, Peter De Schrijver wrote: > On Wed, Jan 24, 2018 at 10:43:45PM +0000, Jon Hunter wrote: >> >> On 23/01/18 09:22, Peter De Schrijver wrote: >>> Apply the memory built-in self test work around when ungating certain >>> Tegra210 power domains. >> >> Nit-pick .. typo in $subject. >> >>> Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> >>> --- >>> drivers/soc/tegra/pmc.c | 5 +++++ >>> 1 file changed, 5 insertions(+) >>> >>> diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c >>> index ce62a47..c4eff4b 100644 >>> --- a/drivers/soc/tegra/pmc.c >>> +++ b/drivers/soc/tegra/pmc.c >>> @@ -153,6 +153,7 @@ struct tegra_pmc_soc { >>> >>> bool has_tsense_reset; >>> bool has_gpu_clamps; >>> + bool needs_mbist_war; >>> >>> const struct tegra_io_pad_soc *io_pads; >>> unsigned int num_io_pads; >>> @@ -431,6 +432,9 @@ static int tegra_powergate_power_up(struct tegra_powergate *pg, >>> >>> usleep_range(10, 20); >>> >>> + if (pg->pmc->soc->needs_mbist_war) >>> + tegra210_clk_handle_mbist_war(pg->id); >>> + >> >> Be good if we could return an error from the above function. >> > > We need to also undo whatever we did before then. I think it is fine if on error you 'goto disable_clks'. Cheers Jon
On Thu, Jan 25, 2018 at 10:57:36AM +0000, Jon Hunter wrote: > > On 25/01/18 10:06, Peter De Schrijver wrote: > > On Wed, Jan 24, 2018 at 10:43:45PM +0000, Jon Hunter wrote: > >> > >> On 23/01/18 09:22, Peter De Schrijver wrote: > >>> Apply the memory built-in self test work around when ungating certain > >>> Tegra210 power domains. > >> > >> Nit-pick .. typo in $subject. > >> > >>> Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> > >>> --- > >>> drivers/soc/tegra/pmc.c | 5 +++++ > >>> 1 file changed, 5 insertions(+) > >>> > >>> diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c > >>> index ce62a47..c4eff4b 100644 > >>> --- a/drivers/soc/tegra/pmc.c > >>> +++ b/drivers/soc/tegra/pmc.c > >>> @@ -153,6 +153,7 @@ struct tegra_pmc_soc { > >>> > >>> bool has_tsense_reset; > >>> bool has_gpu_clamps; > >>> + bool needs_mbist_war; > >>> > >>> const struct tegra_io_pad_soc *io_pads; > >>> unsigned int num_io_pads; > >>> @@ -431,6 +432,9 @@ static int tegra_powergate_power_up(struct tegra_powergate *pg, > >>> > >>> usleep_range(10, 20); > >>> > >>> + if (pg->pmc->soc->needs_mbist_war) > >>> + tegra210_clk_handle_mbist_war(pg->id); > >>> + > >> > >> Be good if we could return an error from the above function. > >> > > > > We need to also undo whatever we did before then. > > I think it is fine if on error you 'goto disable_clks'. Shouldn't we do this for tegra_powergate_reset_deassert() failure as well then? Also in case of tegra_powergate_enable_clocks() failure we should probably jump to powergate_off because tegra_powergate_enable_clocks() will disable the already enabled clocks on failure. Peter. -- To unsubscribe from this list: send the line "unsubscribe linux-tegra" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 25/01/18 12:26, Peter De Schrijver wrote: > On Thu, Jan 25, 2018 at 10:57:36AM +0000, Jon Hunter wrote: >> >> On 25/01/18 10:06, Peter De Schrijver wrote: >>> On Wed, Jan 24, 2018 at 10:43:45PM +0000, Jon Hunter wrote: >>>> >>>> On 23/01/18 09:22, Peter De Schrijver wrote: >>>>> Apply the memory built-in self test work around when ungating certain >>>>> Tegra210 power domains. >>>> >>>> Nit-pick .. typo in $subject. >>>> >>>>> Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> >>>>> --- >>>>> drivers/soc/tegra/pmc.c | 5 +++++ >>>>> 1 file changed, 5 insertions(+) >>>>> >>>>> diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c >>>>> index ce62a47..c4eff4b 100644 >>>>> --- a/drivers/soc/tegra/pmc.c >>>>> +++ b/drivers/soc/tegra/pmc.c >>>>> @@ -153,6 +153,7 @@ struct tegra_pmc_soc { >>>>> >>>>> bool has_tsense_reset; >>>>> bool has_gpu_clamps; >>>>> + bool needs_mbist_war; >>>>> >>>>> const struct tegra_io_pad_soc *io_pads; >>>>> unsigned int num_io_pads; >>>>> @@ -431,6 +432,9 @@ static int tegra_powergate_power_up(struct tegra_powergate *pg, >>>>> >>>>> usleep_range(10, 20); >>>>> >>>>> + if (pg->pmc->soc->needs_mbist_war) >>>>> + tegra210_clk_handle_mbist_war(pg->id); >>>>> + >>>> >>>> Be good if we could return an error from the above function. >>>> >>> >>> We need to also undo whatever we did before then. >> >> I think it is fine if on error you 'goto disable_clks'. > > Shouldn't we do this for tegra_powergate_reset_deassert() failure as well then? > Also in case of tegra_powergate_enable_clocks() failure we should probably jump > to powergate_off because tegra_powergate_enable_clocks() will disable the > already enabled clocks on failure. Yes that looks like a bug in the existing code and we should fix that. Good catch. Jon
diff --git a/drivers/soc/tegra/pmc.c b/drivers/soc/tegra/pmc.c index ce62a47..c4eff4b 100644 --- a/drivers/soc/tegra/pmc.c +++ b/drivers/soc/tegra/pmc.c @@ -153,6 +153,7 @@ struct tegra_pmc_soc { bool has_tsense_reset; bool has_gpu_clamps; + bool needs_mbist_war; const struct tegra_io_pad_soc *io_pads; unsigned int num_io_pads; @@ -431,6 +432,9 @@ static int tegra_powergate_power_up(struct tegra_powergate *pg, usleep_range(10, 20); + if (pg->pmc->soc->needs_mbist_war) + tegra210_clk_handle_mbist_war(pg->id); + if (disable_clocks) tegra_powergate_disable_clocks(pg); @@ -1815,6 +1819,7 @@ static void tegra20_pmc_setup_irq_polarity(struct tegra_pmc *pmc, .cpu_powergates = tegra210_cpu_powergates, .has_tsense_reset = true, .has_gpu_clamps = true, + .needs_mbist_war = true, .num_io_pads = ARRAY_SIZE(tegra210_io_pads), .io_pads = tegra210_io_pads, .regs = &tegra20_pmc_regs,
Apply the memory built-in self test work around when ungating certain Tegra210 power domains. Signed-off-by: Peter De Schrijver <pdeschrijver@nvidia.com> --- drivers/soc/tegra/pmc.c | 5 +++++ 1 file changed, 5 insertions(+)