| Message ID | 1473414302-390-1-git-send-email-ykk@rock-chips.com (mailing list archive) |
|---|---|
| State | Not Applicable |
| Headers | show |
On Fri, Sep 9, 2016 at 5:45 AM, Yakir Yang <ykk@rock-chips.com> wrote: > 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 v3: > - Update commit message > - Add DP_TIMEOUT_PSR_LOOP_MS marcos > - Correct the return values of analogix_dp_send_psr_spd() > > 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 | 5 +++-- > drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 25 ++++++++++++++++++++-- > 3 files changed, 28 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 d564e90..a27f1e3 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h > @@ -20,6 +20,7 @@ > #define MAX_EQ_LOOP 5 > > #define DP_TIMEOUT_LOOP_MS msecs_to_jiffies(1) > +#define DP_TIMEOUT_PSR_LOOP_MS msecs_to_jiffies(300) Same comment here re: units. 300ms seems like a really long time. Why does it take this long? Sean > > /* DP_MAX_LANE_COUNT */ > #define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) > @@ -248,8 +249,8 @@ 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 15a4cf0..7fd4ed0 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 + DP_TIMEOUT_PSR_LOOP_MS; > + 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 -EBUSY; > + } > + > + if ((vsc->DB1 && sink == DP_PSR_SINK_ACTIVE_RFB) || > + (!vsc->DB1 && sink == DP_PSR_SINK_INACTIVE)) > + return 0; > + > + usleep_range(1000, 1500); > + } > + > + dev_warn(dp->dev, "Failed to apply PSR, sink state was [%x]", sink); > + > + 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
Hi Sean, On 09/12/2016 09:52 PM, Sean Paul wrote: > On Fri, Sep 9, 2016 at 5:45 AM, Yakir Yang <ykk@rock-chips.com> wrote: >> 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 v3: >> - Update commit message >> - Add DP_TIMEOUT_PSR_LOOP_MS marcos >> - Correct the return values of analogix_dp_send_psr_spd() >> >> 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 | 5 +++-- >> drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 25 ++++++++++++++++++++-- >> 3 files changed, 28 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 d564e90..a27f1e3 100644 >> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h >> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h >> @@ -20,6 +20,7 @@ >> #define MAX_EQ_LOOP 5 >> >> #define DP_TIMEOUT_LOOP_MS msecs_to_jiffies(1) >> +#define DP_TIMEOUT_PSR_LOOP_MS msecs_to_jiffies(300) > Same comment here re: units. > > 300ms seems like a really long time. Why does it take this long? This magic number '300ms' just come from my test, I haven't found the description in eDP 1.4a Spec about what exact time should Sink take to entry PSR. - Yakir > Sean > > >> /* DP_MAX_LANE_COUNT */ >> #define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) >> @@ -248,8 +249,8 @@ 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 15a4cf0..7fd4ed0 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 + DP_TIMEOUT_PSR_LOOP_MS; >> + 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 -EBUSY; >> + } >> + >> + if ((vsc->DB1 && sink == DP_PSR_SINK_ACTIVE_RFB) || >> + (!vsc->DB1 && sink == DP_PSR_SINK_INACTIVE)) >> + return 0; >> + >> + usleep_range(1000, 1500); >> + } >> + >> + dev_warn(dp->dev, "Failed to apply PSR, sink state was [%x]", sink); >> + >> + 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 d564e90..a27f1e3 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -20,6 +20,7 @@ #define MAX_EQ_LOOP 5 #define DP_TIMEOUT_LOOP_MS msecs_to_jiffies(1) +#define DP_TIMEOUT_PSR_LOOP_MS msecs_to_jiffies(300) /* DP_MAX_LANE_COUNT */ #define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) @@ -248,8 +249,8 @@ 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 15a4cf0..7fd4ed0 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 + DP_TIMEOUT_PSR_LOOP_MS; + 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 -EBUSY; + } + + if ((vsc->DB1 && sink == DP_PSR_SINK_ACTIVE_RFB) || + (!vsc->DB1 && sink == DP_PSR_SINK_INACTIVE)) + return 0; + + usleep_range(1000, 1500); + } + + dev_warn(dp->dev, "Failed to apply PSR, sink state was [%x]", sink); + + return -ETIMEDOUT; } ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
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 v3: - Update commit message - Add DP_TIMEOUT_PSR_LOOP_MS marcos - Correct the return values of analogix_dp_send_psr_spd() 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 | 5 +++-- drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 25 ++++++++++++++++++++-- 3 files changed, 28 insertions(+), 8 deletions(-)