Re: [PATCH v5 19/36] drm/rockchip: Restore psr->state when enable/disable psr failed

Archit Taneja
2018-03-14T06:32:18Z

On Saturday 10 March 2018 03:53 AM, Enric Balletbo i Serra wrote:
> From: zain wang <wzz@rock-chips.com>
>
> If we failed disable psr, it would hang the display until next psr
> cycle coming. So we should restore psr->state when it failed.
>

For the bridge part,

Reviewed-by: Archit Taneja <architt@codeaurora.org>

Thanks,
Archit

> Cc: Tomasz Figa <tfiga@chromium.org>
> Signed-off-by: zain wang <wzz@rock-chips.com>
> Signed-off-by: Douglas Anderson <dianders@chromium.org>
> Signed-off-by: Sean Paul <seanpaul@chromium.org>
> Signed-off-by: Thierry Escande <thierry.escande@collabora.com>
> Signed-off-by: Enric Balletbo i Serra <enric.balletbo@collabora.com>
> Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
> ---
>
> drivers/gpu/drm/bridge/analogix/analogix_dp_core.c | 4 +++-
> drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 10 +++++-----
> drivers/gpu/drm/rockchip/rockchip_drm_psr.c | 20 +++++++++++++-------
> drivers/gpu/drm/rockchip/rockchip_drm_psr.h | 2 +-
> 4 files changed, 22 insertions(+), 14 deletions(-)
>
> diff --git a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> index be6eddd0d0a7..1f1cb624414d 100644
> --- a/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> +++ b/drivers/gpu/drm/bridge/analogix/analogix_dp_core.c
> @@ -153,8 +153,10 @@ int analogix_dp_disable_psr(struct analogix_dp_device *dp)
> psr_vsc.DB1 = 0;
>
> ret = drm_dp_dpcd_writeb(&dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
> - if (ret != 1)
> + if (ret != 1) {
> dev_err(dp->dev, "Failed to set DP Power0 %d\n", ret);
> + return ret;
> + }
>
> return analogix_dp_send_psr_spd(dp, &psr_vsc, false);
> }
> diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> index 3e8bf79bea58..8c884f9ce713 100644
> --- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
> @@ -77,13 +77,13 @@ struct rockchip_dp_device {
> struct analogix_dp_plat_data plat_data;
> };
>
> -static void analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
> +static int analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
> {
> struct rockchip_dp_device *dp = to_dp(encoder);
> int ret;
>
> if (!analogix_dp_psr_enabled(dp->adp))
> - return;
> + return 0;
>
> DRM_DEV_DEBUG(dp->dev, "%s PSR...\n", enabled ? "Entry" : "Exit");
>
> @@ -91,13 +91,13 @@ static void analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
> PSR_WAIT_LINE_FLAG_TIMEOUT_MS);
> if (ret) {
> DRM_DEV_ERROR(dp->dev, "line flag interrupt did not arrive\n");
> - return;
> + return -ETIMEDOUT;
> }
>
> if (enabled)
> - analogix_dp_enable_psr(dp->adp);
> + return analogix_dp_enable_psr(dp->adp);
> else
> - analogix_dp_disable_psr(dp->adp);
> + return analogix_dp_disable_psr(dp->adp);
> }
>
> static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
> index b339ca943139..9376f4396b6b 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.c
> @@ -36,7 +36,7 @@ struct psr_drv {
>
> struct delayed_work flush_work;
>
> - void (*set)(struct drm_encoder *encoder, bool enable);
> + int (*set)(struct drm_encoder *encoder, bool enable);
> };
>
> static struct psr_drv *find_psr_by_crtc(struct drm_crtc *crtc)
> @@ -93,19 +93,25 @@ static void psr_set_state_locked(struct psr_drv *psr, enum psr_state state)
> return;
> }
>
> - psr->state = state;
> -
> /* Actually commit the state change to hardware */
> - switch (psr->state) {
> + switch (state) {
> case PSR_ENABLE:
> - psr->set(psr->encoder, true);
> + if (psr->set(psr->encoder, true))
> + return;
> break;
>
> case PSR_DISABLE:
> case PSR_FLUSH:
> - psr->set(psr->encoder, false);
> + if (psr->set(psr->encoder, false))
> + return;
> break;
> +
> + default:
> + pr_err("%s: Unknown state %d\n", __func__, state);
> + return;
> }
> +
> + psr->state = state;
> }
>
> static void psr_set_state(struct psr_drv *psr, enum psr_state state)
> @@ -229,7 +235,7 @@ EXPORT_SYMBOL(rockchip_drm_psr_flush_all);
> * Zero on success, negative errno on failure.
> */
> int rockchip_drm_psr_register(struct drm_encoder *encoder,
> - void (*psr_set)(struct drm_encoder *, bool enable))
> + int (*psr_set)(struct drm_encoder *, bool enable))
> {
> struct rockchip_drm_private *drm_drv = encoder->dev->dev_private;
> struct psr_drv *psr;
> diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
> index b1ea0155e57c..06537ee27565 100644
> --- a/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
> +++ b/drivers/gpu/drm/rockchip/rockchip_drm_psr.h
> @@ -22,7 +22,7 @@ int rockchip_drm_psr_activate(struct drm_encoder *encoder);
> int rockchip_drm_psr_deactivate(struct drm_encoder *encoder);
>
> int rockchip_drm_psr_register(struct drm_encoder *encoder,
> - void (*psr_set)(struct drm_encoder *, bool enable));
> + int (*psr_set)(struct drm_encoder *, bool enable));
> void rockchip_drm_psr_unregister(struct drm_encoder *encoder);
>
> #endif /* __ROCKCHIP_DRM_PSR__ */
>
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