[PATCH v5 02/36] drm/rockchip: Remove analogix psr worker

Enric Balletbo i Serra
2018-03-09T22:22:53Z

From: Sean Paul <seanpaul@chromium.org>

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>
Tested-by: Marek Szyprowski <m.szyprowski@samsung.com>
---

drivers/gpu/drm/rockchip/analogix_dp-rockchip.c | 31 ++-----------------------
1 file 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;
--
2.16.1

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