| Message ID | 1473306526-4340-1-git-send-email-ykk@rock-chips.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Wed, Sep 7, 2016 at 11:48 PM, Yakir Yang <ykk@rock-chips.com> wrote: > Make sure the request PSR state could effect in analogix_dp_send_psr_spd() > function, or printing the error Sink PSR state if we failed to effect > the request PSR setting. > Let's change to: Make sure the request PSR state takes effect in analogix_dp_send_psr_spd() function, or print the sink PSR error state if we failed to apply the requested PSR setting. > Signed-off-by: Yakir Yang <ykk@rock-chips.com> > --- > Changes in v2: > - A bunch of good fixes from Sean > > drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 6 ++---- > drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 4 ++-- > drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 25 ++++++++++++++++++++-- > 3 files changed, 27 insertions(+), 8 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > index 5fe3982..c0ce16a 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > @@ -116,8 +116,7 @@ int analogix_dp_enable_psr(struct device *dev) > psr_vsc.DB0 = 0; > psr_vsc.DB1 = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID; > > - analogix_dp_send_psr_spd(dp, &psr_vsc); > - return 0; > + return analogix_dp_send_psr_spd(dp, &psr_vsc); > } > EXPORT_SYMBOL_GPL(analogix_dp_enable_psr); > > @@ -139,8 +138,7 @@ int analogix_dp_disable_psr(struct device *dev) > psr_vsc.DB0 = 0; > psr_vsc.DB1 = 0; > > - analogix_dp_send_psr_spd(dp, &psr_vsc); > - return 0; > + return analogix_dp_send_psr_spd(dp, &psr_vsc); > } > EXPORT_SYMBOL_GPL(analogix_dp_disable_psr); > > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h > index a15f076..6c07a50 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h > @@ -247,8 +247,8 @@ void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp); > void analogix_dp_enable_scrambling(struct analogix_dp_device *dp); > void analogix_dp_disable_scrambling(struct analogix_dp_device *dp); > void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp); > -void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, > - struct edp_vsc_psr *vsc); > +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, > + struct edp_vsc_psr *vsc); > ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, > struct drm_dp_aux_msg *msg); > #endif /* _ANALOGIX_DP_CORE_H */ > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > index a4d17b8..09d703b 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > @@ -1004,10 +1004,12 @@ void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp) > writel(PSR_VID_CRC_ENABLE, dp->reg_base + ANALOGIX_DP_CRC_CON); > } > > -void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, > - struct edp_vsc_psr *vsc) > +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, > + struct edp_vsc_psr *vsc) > { > + unsigned long timeout; > unsigned int val; > + u8 sink; > > /* don't send info frame */ > val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); > @@ -1048,6 +1050,25 @@ void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, > val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); > val |= IF_EN; > writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); > + > + timeout = jiffies + msecs_to_jiffies(DP_TIMEOUT_LOOP_COUNT); Mismatched units here. DP_TIMEOUT_LOOP_COUNT is defined as number of retries, whereas you're using it as number of ms. Fortunately, the retry number is so high that this works out :) In a separate patch preceding this one, can you change DP_TIMEOUT_LOOP_COUNT to DP_TIMEOUT_LOOP_MS and alter the other timeout loops to use time_before() like this one instead of blindly looping 100 times? After that, you can use DP_TIMEOUT_LOOP_MS here. > + while (time_before(jiffies, timeout)) { > + val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &sink); > + if (val != 1) { > + dev_err(dp->dev, "PSR_STATUS read failed ret=%d", val); > + return val; Ok, since this is my snippet this comment is my fault, and I apologize for that :). However, this could return 0. If drm_dp_dpcd_readb returns 0, you probably want to retry (same as -EBUSY). > + } > + > + if (vsc->DB1 && sink == DP_PSR_SINK_ACTIVE_RFB || > + !vsc->DB1 && sink == DP_PSR_SINK_INACTIVE) > + break; > + > + usleep_range(1000, 1500); > + } > + > + dev_warn(dp->dev, "Failed to effect PSR: %x", sink); Nit: I think you want to say "PSR failed to take effect" or "Failed to apply PSR" Sean > + > + return -ETIMEDOUT; > } > > ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, > -- > 1.9.1 > > > -- > To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in > the body of a message to majordomo@vger.kernel.org > More majordomo info at http://vger.kernel.org/majordomo-info.html -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
On 09/08/2016 10:12 PM, Sean Paul wrote: > On Wed, Sep 7, 2016 at 11:48 PM, Yakir Yang <ykk@rock-chips.com> wrote: >> Make sure the request PSR state could effect in analogix_dp_send_psr_spd() >> function, or printing the error Sink PSR state if we failed to effect >> the request PSR setting. >> > > Let's change to: > > Make sure the request PSR state takes effect in analogix_dp_send_psr_spd() > function, or print the sink PSR error state if we failed to apply the > requested PSR > setting. Done, >> Signed-off-by: Yakir Yang <ykk@rock-chips.com> >> --- >> Changes in v2: >> - A bunch of good fixes from Sean >> >> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 6 ++---- >> drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 4 ++-- >> drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 25 ++++++++++++++++++++-- >> 3 files changed, 27 insertions(+), 8 deletions(-) >> >> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c >> index 5fe3982..c0ce16a 100644 >> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c >> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c >> @@ -116,8 +116,7 @@ int analogix_dp_enable_psr(struct device *dev) >> psr_vsc.DB0 = 0; >> psr_vsc.DB1 = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID; >> >> - analogix_dp_send_psr_spd(dp, &psr_vsc); >> - return 0; >> + return analogix_dp_send_psr_spd(dp, &psr_vsc); >> } >> EXPORT_SYMBOL_GPL(analogix_dp_enable_psr); >> >> @@ -139,8 +138,7 @@ int analogix_dp_disable_psr(struct device *dev) >> psr_vsc.DB0 = 0; >> psr_vsc.DB1 = 0; >> >> - analogix_dp_send_psr_spd(dp, &psr_vsc); >> - return 0; >> + return analogix_dp_send_psr_spd(dp, &psr_vsc); >> } >> EXPORT_SYMBOL_GPL(analogix_dp_disable_psr); >> >> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h >> index a15f076..6c07a50 100644 >> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h >> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h >> @@ -247,8 +247,8 @@ void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp); >> void analogix_dp_enable_scrambling(struct analogix_dp_device *dp); >> void analogix_dp_disable_scrambling(struct analogix_dp_device *dp); >> void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp); >> -void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, >> - struct edp_vsc_psr *vsc); >> +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, >> + struct edp_vsc_psr *vsc); >> ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, >> struct drm_dp_aux_msg *msg); >> #endif /* _ANALOGIX_DP_CORE_H */ >> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c >> index a4d17b8..09d703b 100644 >> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c >> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c >> @@ -1004,10 +1004,12 @@ void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp) >> writel(PSR_VID_CRC_ENABLE, dp->reg_base + ANALOGIX_DP_CRC_CON); >> } >> >> -void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, >> - struct edp_vsc_psr *vsc) >> +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, >> + struct edp_vsc_psr *vsc) >> { >> + unsigned long timeout; >> unsigned int val; >> + u8 sink; >> >> /* don't send info frame */ >> val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); >> @@ -1048,6 +1050,25 @@ void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, >> val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); >> val |= IF_EN; >> writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); >> + >> + timeout = jiffies + msecs_to_jiffies(DP_TIMEOUT_LOOP_COUNT); > Mismatched units here. DP_TIMEOUT_LOOP_COUNT is defined as number of > retries, whereas you're using it as number of ms. Fortunately, the > retry number is so high that this works out :) > > In a separate patch preceding this one, can you change > DP_TIMEOUT_LOOP_COUNT to DP_TIMEOUT_LOOP_MS and alter the other > timeout loops to use time_before() like this one instead of blindly > looping 100 times? After that, you can use DP_TIMEOUT_LOOP_MS here. Done, and after do some experiments, I found we need to set the timeout to 300ms. Cause in some case we would take about 290ms here to get the right psr state. >> + while (time_before(jiffies, timeout)) { >> + val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &sink); >> + if (val != 1) { >> + dev_err(dp->dev, "PSR_STATUS read failed ret=%d", val); >> + return val; > Ok, since this is my snippet this comment is my fault, and I apologize > for that :). However, this could return 0. If drm_dp_dpcd_readb > returns 0, you probably want to retry (same as -EBUSY). done, just return -EBUSY > >> + } >> + >> + if (vsc->DB1 && sink == DP_PSR_SINK_ACTIVE_RFB || >> + !vsc->DB1 && sink == DP_PSR_SINK_INACTIVE) >> + break; >> + >> + usleep_range(1000, 1500); >> + } >> + >> + dev_warn(dp->dev, "Failed to effect PSR: %x", sink); > Nit: I think you want to say "PSR failed to take effect" or "Failed to > apply PSR" Done - Yakir > Sean > >> + >> + return -ETIMEDOUT; >> } >> >> ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, >> -- >> 1.9.1 >> >> >> -- >> To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in >> the body of a message to majordomo@vger.kernel.org >> More majordomo info at http://vger.kernel.org/majordomo-info.html > > -- To unsubscribe from this list: send the line "unsubscribe linux-samsung-soc" in the body of a message to majordomo@vger.kernel.org More majordomo info at http://vger.kernel.org/majordomo-info.html
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index 5fe3982..c0ce16a 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -116,8 +116,7 @@ int analogix_dp_enable_psr(struct device *dev) psr_vsc.DB0 = 0; psr_vsc.DB1 = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID; - analogix_dp_send_psr_spd(dp, &psr_vsc); - return 0; + return analogix_dp_send_psr_spd(dp, &psr_vsc); } EXPORT_SYMBOL_GPL(analogix_dp_enable_psr); @@ -139,8 +138,7 @@ int analogix_dp_disable_psr(struct device *dev) psr_vsc.DB0 = 0; psr_vsc.DB1 = 0; - analogix_dp_send_psr_spd(dp, &psr_vsc); - return 0; + return analogix_dp_send_psr_spd(dp, &psr_vsc); } EXPORT_SYMBOL_GPL(analogix_dp_disable_psr); diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h index a15f076..6c07a50 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -247,8 +247,8 @@ void analogix_dp_config_video_slave_mode(struct analogix_dp_device *dp); void analogix_dp_enable_scrambling(struct analogix_dp_device *dp); void analogix_dp_disable_scrambling(struct analogix_dp_device *dp); void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp); -void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, - struct edp_vsc_psr *vsc); +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, + struct edp_vsc_psr *vsc); ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, struct drm_dp_aux_msg *msg); #endif /* _ANALOGIX_DP_CORE_H */ diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index a4d17b8..09d703b 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -1004,10 +1004,12 @@ void analogix_dp_enable_psr_crc(struct analogix_dp_device *dp) writel(PSR_VID_CRC_ENABLE, dp->reg_base + ANALOGIX_DP_CRC_CON); } -void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, - struct edp_vsc_psr *vsc) +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp, + struct edp_vsc_psr *vsc) { + unsigned long timeout; unsigned int val; + u8 sink; /* don't send info frame */ val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); @@ -1048,6 +1050,25 @@ void analogix_dp_send_psr_spd(struct analogix_dp_device *dp, val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); val |= IF_EN; writel(val, dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL); + + timeout = jiffies + msecs_to_jiffies(DP_TIMEOUT_LOOP_COUNT); + while (time_before(jiffies, timeout)) { + val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &sink); + if (val != 1) { + dev_err(dp->dev, "PSR_STATUS read failed ret=%d", val); + return val; + } + + if (vsc->DB1 && sink == DP_PSR_SINK_ACTIVE_RFB || + !vsc->DB1 && sink == DP_PSR_SINK_INACTIVE) + break; + + usleep_range(1000, 1500); + } + + dev_warn(dp->dev, "Failed to effect PSR: %x", sink); + + return -ETIMEDOUT; } ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
Make sure the request PSR state could effect in analogix_dp_send_psr_spd() function, or printing the error Sink PSR state if we failed to effect the request PSR setting. Signed-off-by: Yakir Yang <ykk@rock-chips.com> --- Changes in v2: - A bunch of good fixes from Sean drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 6 ++---- drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 4 ++-- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 25 ++++++++++++++++++++-- 3 files changed, 27 insertions(+), 8 deletions(-)