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Message-Id: <1475160400-30782-4-git-send-email-wzz@rock-chips.com>
Date: Thu, 29 Sep 2016 22:46:39 +0800
From: zain wang <wzz@...k-chips.com>
To: Sean Paul <seanpaul@...omium.org>,
Daniel Vetter <daniel.vetter@...ll.ch>,
Inki Dae <inki.dae@...sung.com>,
David Airlie <airlied@...ux.ie>
Cc: Tomeu Vizoso <tomeu.vizoso@...labora.com>,
Mika Kahola <mika.kahola@...el.com>,
Stéphane Marchesin <marcheu@...omium.org>,
Tomasz Figa <tfiga@...omium.org>, dianders@...omium.org,
Thierry Reding <treding@...dia.com>,
Krzysztof Kozlowski <k.kozlowski@...sung.com>,
Heiko Stuebner <heiko@...ech.de>,
Jingoo Han <jingoohan1@...il.com>,
Javier Martinez Canillas <javier@....samsung.com>,
Yakir Yang <ykk@...k-chips.com>, linux-kernel@...r.kernel.org,
dri-devel@...ts.freedesktop.org, linux-samsung-soc@...r.kernel.org,
linux-rockchip@...ts.infradead.org, Zain Wang <wzz@...k-chips.com>
Subject: [PATCH v1 3/4] drm/bridge: analogix_dp: detect Sink PSR state after configuring the PSR
From: Yakir Yang <ykk@...k-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: Yakir Yang <ykk@...k-chips.com>
Signed-off-by: Zain Wang <wzz@...k-chips.com>
---
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 | 8 ++++---
4 files changed, 34 insertions(+), 11 deletions(-)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index 026ec91..7177f5f 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -119,8 +119,7 @@ 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);
@@ -145,8 +144,7 @@ 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 e83be15..dc106d0 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -102,10 +102,10 @@ 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;
+ unsigned long flags;
+ unsigned int psr_state;
int vact_end;
int ret;
- unsigned long flags;
if (!crtc)
return;
@@ -120,11 +120,13 @@ 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)
--
1.9.1
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