Re: [PATCH v4 03/38] drm/bridge: analogix_dp: detect Sink PSR state after configuring the PSR
Hi Enric,
Am Montag, 5. März 2018, 23:22:55 CET schrieb Enric Balletbo i Serra:
> From: Yakir Yang
>
> 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.
>
> Cc: 征增 王
> Cc: Stéphane Marchesin
> Signed-off-by: Yakir Yang
> [seanpaul changed timeout loop to a readx poll]
> Signed-off-by: Sean Paul
> Signed-off-by: Thierry Escande
> Signed-off-by: Enric Balletbo i Serra
as this modifies the generic part of the analogix_dp, I think we'll
need some form of Ack from the drm-bridge maintainers.
[Or bridge maintainers applying it].
Change itself looks good, at least to me :-) .
It seems your recipient list is missing some bridge maintainers though.
MAINTAINERS, tells us that
Archit Taneja
Andrzej Hajda
Laurent Pinchart
should be CCed, but right now I only see Archit.
As there are quite a lot of general patches in here, I'd think this calls
for a v5, including Mareks tested-tag and including the missing people.
Heiko
>
> 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 | 35
> +++---
> 3 files changed, 37 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 a693ab3078f0..e738aa6de1af 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -122,8 +122,7 @@ int analogix_dp_enable_psr(struct analogix_dp_device *dp)
> 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);
>
> @@ -149,8 +148,7 @@ int analogix_dp_disable_psr(struct analogix_dp_device *dp)
> if (ret != 1)
> dev_err(dp->dev, "Failed to set DP Power0 %d\n", ret);
>
> - 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 5c6a28806129..b039b28d8fcc 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 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 303083ad28e3..005a3f7005d2 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
> @@ -10,10 +10,11 @@
> * option) any later version.
> */
>
> -#include
> -#include
> #include
> +#include
> #include
> +#include
> +#include
>
> #include
>
> @@ -992,10 +993,25 @@ 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)
> +static ssize_t analogix_dp_get_psr_status(struct analogix_dp_device *dp)
> +{
> + ssize_t val;
> + u8 status;
> +
> + val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &status);
> + if (val < 0) {
> + dev_err(dp->dev, "PSR_STATUS read failed ret=%zd", val);
> + return val;
> + }
> + return status;
> +}
> +
> +int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
> + struct edp_vsc_psr *vsc)
> {
> unsigned int val;
> + int ret;
> + ssize_t psr_status;
>
> /* don't send info frame */
> val = readl(dp->reg_base + ANALOGIX_DP_PKT
[PATCH v4 03/38] drm/bridge: analogix_dp: detect Sink PSR state after configuring the PSR
From: Yakir Yang
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.
Cc: 征增 王
Cc: Stéphane Marchesin
Signed-off-by: Yakir Yang
[seanpaul changed timeout loop to a readx poll]
Signed-off-by: Sean Paul
Signed-off-by: Thierry Escande
Signed-off-by: Enric Balletbo i Serra
---
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 | 35 +++---
3 files changed, 37 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 a693ab3078f0..e738aa6de1af 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
@@ -122,8 +122,7 @@ int analogix_dp_enable_psr(struct analogix_dp_device *dp)
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);
@@ -149,8 +148,7 @@ int analogix_dp_disable_psr(struct analogix_dp_device *dp)
if (ret != 1)
dev_err(dp->dev, "Failed to set DP Power0 %d\n", ret);
- 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 5c6a28806129..b039b28d8fcc 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 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 303083ad28e3..005a3f7005d2 100644
--- a/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
+++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_reg.c
@@ -10,10 +10,11 @@
* option) any later version.
*/
-#include
-#include
#include
+#include
#include
+#include
+#include
#include
@@ -992,10 +993,25 @@ 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)
+static ssize_t analogix_dp_get_psr_status(struct analogix_dp_device *dp)
+{
+ ssize_t val;
+ u8 status;
+
+ val = drm_dp_dpcd_readb(&dp->aux, DP_PSR_STATUS, &status);
+ if (val < 0) {
+ dev_err(dp->dev, "PSR_STATUS read failed ret=%zd", val);
+ return val;
+ }
+ return status;
+}
+
+int analogix_dp_send_psr_spd(struct analogix_dp_device *dp,
+struct edp_vsc_psr *vsc)
{
unsigned int val;
+ int ret;
+ ssize_t psr_status;
/* don't send info frame */
val = readl(dp->reg_base + ANALOGIX_DP_PKT_SEND_CTL);
@@ -1036,6 +1052,17 @@ 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);
+
+ ret = readx_poll_timeout(analogix_dp_get_psr_status, dp, psr_status,
+ psr_status >= 0 &&
+ ((vsc->DB1 && psr_status == DP_PSR_SINK_ACTIVE_RFB) ||
+ (!vsc->DB1 && psr_status == DP_PSR_SINK_INACTIVE)), 1500,
+ DP_TIMEOUT_PSR_LOOP_MS * 1000);
+ if (ret) {
+ dev_warn(dp->dev, "Failed to apply PSR %d\n", ret);
+ return ret;
+ }
+ return 0;
}
ssize_t analogix_dp_transfer(struct analogix_dp_device *dp,
--
2.16.1
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