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Date: Fri, 30 Sep 2016 20:54:24 +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>,
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 v2 4/4] drm: bridge/analogix: switch Main-link and eDP PHY when enable/disable psr
turn off Main-link and power down eDP PHY when enable psr,
turn on Main-link and power up eDP PHY when disable psr.
Signed-off-by: zain wang <wzz@...k-chips.com>
---
Changes in v2:
- misc changes
drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 124 ++++++++++++---------
1 file changed, 70 insertions(+), 54 deletions(-)
diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
index bf87891..58fa1c1 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -120,57 +120,6 @@ static int analogix_dp_get_dpms_mode(struct analogix_dp_device *dp)
return mode;
}
-
-int analogix_dp_enable_psr(struct device *dev)
-{
- struct analogix_dp_device *dp = dev_get_drvdata(dev);
- struct edp_vsc_psr psr_vsc;
-
- if (!dp->psr_support)
- return -EINVAL;
-
- if (analogix_dp_get_dpms_mode(dp) != DRM_MODE_DPMS_ON)
- return -EBUSY;
-
- /* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
- memset(&psr_vsc, 0, sizeof(psr_vsc));
- psr_vsc.sdp_header.HB0 = 0;
- psr_vsc.sdp_header.HB1 = 0x7;
- psr_vsc.sdp_header.HB2 = 0x2;
- psr_vsc.sdp_header.HB3 = 0x8;
-
- psr_vsc.DB0 = 0;
- psr_vsc.DB1 = EDP_VSC_PSR_STATE_ACTIVE | EDP_VSC_PSR_CRC_VALUES_VALID;
-
- return analogix_dp_send_psr_spd(dp, &psr_vsc);
-}
-EXPORT_SYMBOL_GPL(analogix_dp_enable_psr);
-
-int analogix_dp_disable_psr(struct device *dev)
-{
- struct analogix_dp_device *dp = dev_get_drvdata(dev);
- struct edp_vsc_psr psr_vsc;
-
- if (!dp->psr_support)
- return -EINVAL;
-
- if (analogix_dp_get_dpms_mode(dp) != DRM_MODE_DPMS_ON)
- return -EBUSY;
-
- /* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
- memset(&psr_vsc, 0, sizeof(psr_vsc));
- psr_vsc.sdp_header.HB0 = 0;
- psr_vsc.sdp_header.HB1 = 0x7;
- psr_vsc.sdp_header.HB2 = 0x2;
- psr_vsc.sdp_header.HB3 = 0x8;
-
- psr_vsc.DB0 = 0;
- psr_vsc.DB1 = 0;
-
- return analogix_dp_send_psr_spd(dp, &psr_vsc);
-}
-EXPORT_SYMBOL_GPL(analogix_dp_disable_psr);
-
static bool analogix_dp_detect_sink_psr(struct analogix_dp_device *dp)
{
unsigned char psr_version;
@@ -191,12 +140,11 @@ static void analogix_dp_enable_sink_psr(struct analogix_dp_device *dp)
drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
/* Main-Link transmitter remains active during PSR active states */
- psr_en = DP_PSR_MAIN_LINK_ACTIVE | DP_PSR_CRC_VERIFICATION;
+ psr_en = DP_PSR_CRC_VERIFICATION;
drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
/* Enable psr function */
- psr_en = DP_PSR_ENABLE | DP_PSR_MAIN_LINK_ACTIVE |
- DP_PSR_CRC_VERIFICATION;
+ psr_en = DP_PSR_ENABLE | DP_PSR_CRC_VERIFICATION;
drm_dp_dpcd_writeb(&dp->aux, DP_PSR_EN_CFG, psr_en);
analogix_dp_enable_psr_crc(dp);
@@ -899,6 +847,74 @@ static void analogix_dp_commit(struct analogix_dp_device *dp)
analogix_dp_enable_sink_psr(dp);
}
+int analogix_dp_enable_psr(struct device *dev)
+{
+ struct analogix_dp_device *dp = dev_get_drvdata(dev);
+ struct edp_vsc_psr psr_vsc;
+
+ if (!dp->psr_support)
+ return -EINVAL;
+
+ if (analogix_dp_get_dpms_mode(dp) != DRM_MODE_DPMS_ON)
+ return -EBUSY;
+
+ /* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
+ memset(&psr_vsc, 0, sizeof(psr_vsc));
+ psr_vsc.sdp_header.HB0 = 0;
+ psr_vsc.sdp_header.HB1 = 0x7;
+ psr_vsc.sdp_header.HB2 = 0x2;
+ psr_vsc.sdp_header.HB3 = 0x8;
+
+ 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);
+
+ /* Power down the eDP PHY */
+ analogix_dp_set_analog_power_down(dp, POWER_ALL, true);
+
+ return 0;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_enable_psr);
+
+int analogix_dp_disable_psr(struct device *dev)
+{
+ struct analogix_dp_device *dp = dev_get_drvdata(dev);
+ struct edp_vsc_psr psr_vsc;
+ int ret;
+
+ if (!dp->psr_support)
+ return -EINVAL;
+
+ if (analogix_dp_get_dpms_mode(dp) != DRM_MODE_DPMS_ON)
+ return -EBUSY;
+
+ /* Power up the eDP PHY */
+ analogix_dp_set_analog_power_down(dp, POWER_ALL, false);
+
+ ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
+ if (ret < 0) {
+ dev_err(dp->dev, "Failed to set DP Power0\n");
+ }
+
+ analogix_dp_set_link_train(dp, dp->video_info.max_lane_count,
+ dp->video_info.max_link_rate);
+
+ /* Prepare VSC packet as per EDP 1.4 spec, Table 6.9 */
+ memset(&psr_vsc, 0, sizeof(psr_vsc));
+ psr_vsc.sdp_header.HB0 = 0;
+ psr_vsc.sdp_header.HB1 = 0x7;
+ psr_vsc.sdp_header.HB2 = 0x2;
+ psr_vsc.sdp_header.HB3 = 0x8;
+
+ psr_vsc.DB0 = 0;
+ psr_vsc.DB1 = 0;
+
+ analogix_dp_send_psr_spd(dp, &psr_vsc);
+ return 0;
+}
+EXPORT_SYMBOL_GPL(analogix_dp_disable_psr);
+
/*
* This function is a bit of a catch-all for panel preparation, hopefully
* simplifying the logic of functions that need to prepare/unprepare the panel
--
1.9.1
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