drm/rockchip: Remove analogix psr worker

Now that the spinlocks and timers are gone, we can remove the psr
worker located in rockchip's analogix driver and do the enable/disable
directly. This should simplify the code and remove races on disable.

Cc: 征增 王 <wzz@rock-chips.com>
Cc: Stéphane Marchesin <marcheu@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>
Signed-off-by: Heiko Stuebner <heiko@sntech.de>
Link: https://patchwork.freedesktop.org/patch/msgid/20180309222327.18689-3-enric.balletbo@collabora.com

1 files changed, 2 insertions, 29 deletions

diff --git a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
index 7d76ff47028d..36334839a3f8 100644
--- a/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
+++ b/drivers/gpu/drm/rockchip/analogix_dp-rockchip.c
@@ -71,10 +71,6 @@ struct rockchip_dp_device {
         struct regmap            *grf;
         struct reset_control     *rst;
 
-        struct work_struct       psr_work;
-        struct mutex             psr_lock;
-        unsigned int             psr_state;
-
         const struct rockchip_dp_chip_data *data;
 
         struct analogix_dp_device *adp;
@@ -84,28 +80,13 @@ struct rockchip_dp_device {
 static void analogix_dp_psr_set(struct drm_encoder *encoder, bool enabled)
 {
         struct rockchip_dp_device *dp = to_dp(encoder);
+        int ret;
 
         if (!analogix_dp_psr_supported(dp->adp))
                 return;
 
         DRM_DEV_DEBUG(dp->dev, "%s PSR...\n", enabled ? "Entry" : "Exit");
 
-        mutex_lock(&dp->psr_lock);
-        if (enabled)
-                dp->psr_state = EDP_VSC_PSR_STATE_ACTIVE;
-        else
-                dp->psr_state = ~EDP_VSC_PSR_STATE_ACTIVE;
-
-        schedule_work(&dp->psr_work);
-        mutex_unlock(&dp->psr_lock);
-}
-
-static void analogix_dp_psr_work(struct work_struct *work)
-{
-        struct rockchip_dp_device *dp =
-                                container_of(work, typeof(*dp), psr_work);
-        int ret;
-
         ret = rockchip_drm_wait_vact_end(dp->encoder.crtc,
                                          PSR_WAIT_LINE_FLAG_TIMEOUT_MS);
         if (ret) {
@@ -113,12 +94,10 @@ static void analogix_dp_psr_work(struct work_struct *work)
                 return;
         }
 
-        mutex_lock(&dp->psr_lock);
-        if (dp->psr_state == EDP_VSC_PSR_STATE_ACTIVE)
+        if (enabled)
                 analogix_dp_enable_psr(dp->adp);
         else
                 analogix_dp_disable_psr(dp->adp);
-        mutex_unlock(&dp->psr_lock);
 }
 
 static int rockchip_dp_pre_init(struct rockchip_dp_device *dp)
@@ -135,8 +114,6 @@ static int rockchip_dp_poweron(struct analogix_dp_plat_data *plat_data)
         struct rockchip_dp_device *dp = to_dp(plat_data);
         int ret;
 
-        cancel_work_sync(&dp->psr_work);
-
         ret = clk_prepare_enable(dp->pclk);
         if (ret < 0) {
                 DRM_DEV_ERROR(dp->dev, "failed to enable pclk %d\n", ret);
@@ -355,10 +332,6 @@ static int rockchip_dp_bind(struct device *dev, struct device *master,
         dp->plat_data.power_off = rockchip_dp_powerdown;
         dp->plat_data.get_modes = rockchip_dp_get_modes;
 
-        mutex_init(&dp->psr_lock);
-        dp->psr_state = ~EDP_VSC_PSR_STATE_ACTIVE;
-        INIT_WORK(&dp->psr_work, analogix_dp_psr_work);
-
         ret = rockchip_drm_psr_register(&dp->encoder, analogix_dp_psr_set);
         if (ret < 0)
                 goto err_cleanup_encoder;