| Message ID | 1476771697-11895-1-git-send-email-wzz@rock-chips.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
On Tue, Oct 18, 2016 at 2:21 AM, Zain Wang <wzz@rock-chips.com> wrote: > From: Yakir Yang <ykk@rock-chips.com> > > 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: zain wang <wzz@rock-chips.com> > Signed-off-by: Yakir Yang <ykk@rock-chips.com> > --- > > Changes in v3: None > Changes in v2: None > > drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 6 ++---- > drivers/gpu/drm/bridge/analogix/analogix_dp_core.h | 6 ++++-- > drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c | 25 ++++++++++++++++++++-- > drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 6 ++++-- > 4 files changed, 33 insertions(+), 10 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > index bcae4dd..7faad93 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c > @@ -124,8 +124,7 @@ 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); > > @@ -147,8 +146,7 @@ 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 5c6a288..cdc0535 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h > @@ -20,6 +20,8 @@ > #define MAX_CR_LOOP 5 > #define MAX_EQ_LOOP 5 > > +#define DP_TIMEOUT_PSR_LOOP_MS msecs_to_jiffies(300) This value isn't MS units, it's jiffies. > + > /* DP_MAX_LANE_COUNT */ > #define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) > #define DPCD_MAX_LANE_COUNT(x) ((x) & 0x1f) > @@ -247,8 +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); > > diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > index cd37ac0..9e1177c 100644 > --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c > @@ -992,10 +992,12 @@ 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); > @@ -1036,6 +1038,25 @@ 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; This can all be replaced with readx_poll_timeout > } > > ssize_t analogix_dp_transfer(struct analogix_dp_device *dp, > diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c > index e5471e7..1c2d756 100644 > --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c > +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c > @@ -105,7 +105,7 @@ static void analogix_dp_psr_work(struct work_struct *work) > struct rockchip_dp_device *dp = > container_of(work, typeof(*dp), psr_work); > struct drm_crtc *crtc = dp->encoder.crtc; > - int psr_state = dp->psr_state; > + int psr_state; > int vact_end; > int ret; > unsigned long flags; > @@ -123,11 +123,13 @@ static void analogix_dp_psr_work(struct work_struct *work) > } > > spin_lock_irqsave(&dp->psr_lock, flags); > + psr_state = dp->psr_state; > + spin_unlock_irqrestore(&dp->psr_lock, flags); > + > if (psr_state == EDP_VSC_PSR_STATE_ACTIVE) > analogix_dp_enable_psr(dp->dev); > else > analogix_dp_disable_psr(dp->dev); > - spin_unlock_irqrestore(&dp->psr_lock, flags); I think we've been back and forth on this enough times to know what I'm going to say about moving/removing the lock here :-) It seems like the reason you need to do this is because of the proliferation of spinlocks through the psr stack (which I think is due to the way flush timer is implemented). I just whipped up a patch to change this stuff to non-atomic context such that we can keep locking things in a safe manner. I'll post it on list and cc you, you can then rebase your set on that. Sean > } > > static int rockchip_dp_pre_init(struct rockchip_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
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c index bcae4dd..7faad93 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c @@ -124,8 +124,7 @@ 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); @@ -147,8 +146,7 @@ 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 5c6a288..cdc0535 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.h @@ -20,6 +20,8 @@ #define MAX_CR_LOOP 5 #define MAX_EQ_LOOP 5 +#define DP_TIMEOUT_PSR_LOOP_MS msecs_to_jiffies(300) + /* DP_MAX_LANE_COUNT */ #define DPCD_ENHANCED_FRAME_CAP(x) (((x) >> 7) & 0x1) #define DPCD_MAX_LANE_COUNT(x) ((x) & 0x1f) @@ -247,8 +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); diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c index cd37ac0..9e1177c 100644 --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c @@ -992,10 +992,12 @@ 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); @@ -1036,6 +1038,25 @@ 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, diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c index e5471e7..1c2d756 100644 --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c @@ -105,7 +105,7 @@ static void analogix_dp_psr_work(struct work_struct *work) struct rockchip_dp_device *dp = container_of(work, typeof(*dp), psr_work); struct drm_crtc *crtc = dp->encoder.crtc; - int psr_state = dp->psr_state; + int psr_state; int vact_end; int ret; unsigned long flags; @@ -123,11 +123,13 @@ static void analogix_dp_psr_work(struct work_struct *work) } spin_lock_irqsave(&dp->psr_lock, flags); + psr_state = dp->psr_state; + spin_unlock_irqrestore(&dp->psr_lock, flags); + if (psr_state == EDP_VSC_PSR_STATE_ACTIVE) analogix_dp_enable_psr(dp->dev); else analogix_dp_disable_psr(dp->dev); - spin_unlock_irqrestore(&dp->psr_lock, flags); } static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)