drm/exynos/ipp: simplify ipp_find_driver

The patch puts repeated code sequence into one function, removes verbose
comments and decreases log verbosity.

Signed-off-by: Andrzej Hajda <a.hajda@samsung.com>
Signed-off-by: Inki Dae <inki.dae@samsung.com>

diff --git a/drivers/gpu/drm/exynos/exynos_drm_ipp.c b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
index ae75a1d9aaba183417e3db449b936ce9acb25f9e..c411399070d671d1d79075230280dbf22949c267 100644 (file)
--- a/drivers/gpu/drm/exynos/exynos_drm_ipp.c
+++ b/drivers/gpu/drm/exynos/exynos_drm_ipp.c
@@ -174,18 +174,18 @@ static void *ipp_find_obj(struct idr *id_idr, struct mutex *lock, u32 id)
        return obj;
 }
 
-static inline bool ipp_check_dedicated(struct exynos_drm_ippdrv *ippdrv,
-               enum drm_exynos_ipp_cmd cmd)
+static int ipp_check_driver(struct exynos_drm_ippdrv *ippdrv,
+                           struct drm_exynos_ipp_property *property)
 {
-       /*
-        * check dedicated flag and WB, OUTPUT operation with
-        * power on state.
-        */
-       if (ippdrv->dedicated || (!ipp_is_m2m_cmd(cmd) &&
-           !pm_runtime_suspended(ippdrv->dev)))
-               return true;
+       if (ippdrv->dedicated || (!ipp_is_m2m_cmd(property->cmd) &&
+                                 !pm_runtime_suspended(ippdrv->dev)))
+               return -EBUSY;
 
-       return false;
+       if (ippdrv->check_property &&
+           ippdrv->check_property(ippdrv->dev, property))
+               return -EINVAL;
+
+       return 0;
 }
 
 static struct exynos_drm_ippdrv *ipp_find_driver(struct ipp_context *ctx,
@@ -193,62 +193,30 @@ static struct exynos_drm_ippdrv *ipp_find_driver(struct ipp_context *ctx,
 {
        struct exynos_drm_ippdrv *ippdrv;
        u32 ipp_id = property->ipp_id;
-
-       DRM_DEBUG_KMS("ipp_id[%d]\n", ipp_id);
+       int ret;
 
        if (ipp_id) {
-               /* find ipp driver using idr */
-               ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock,
-                       ipp_id);
+               ippdrv = ipp_find_obj(&ctx->ipp_idr, &ctx->ipp_lock, ipp_id);
                if (!ippdrv) {
-                       DRM_ERROR("not found ipp%d driver.\n", ipp_id);
+                       DRM_DEBUG("ipp%d driver not found\n", ipp_id);
                        return ERR_PTR(-ENODEV);
                }
 
-               /*
-                * WB, OUTPUT opertion not supported multi-operation.
-                * so, make dedicated state at set property ioctl.
-                * when ipp driver finished operations, clear dedicated flags.
-                */
-               if (ipp_check_dedicated(ippdrv, property->cmd)) {
-                       DRM_ERROR("already used choose device.\n");
-                       return ERR_PTR(-EBUSY);
-               }
-
-               /*
-                * This is necessary to find correct device in ipp drivers.
-                * ipp drivers have different abilities,
-                * so need to check property.
-                */
-               if (ippdrv->check_property &&
-                   ippdrv->check_property(ippdrv->dev, property)) {
-                       DRM_ERROR("not support property.\n");
-                       return ERR_PTR(-EINVAL);
+               ret = ipp_check_driver(ippdrv, property);
+               if (ret < 0) {
+                       DRM_DEBUG("ipp%d driver check error %d\n", ipp_id, ret);
+                       return ERR_PTR(ret);
                }
 
                return ippdrv;
        } else {
-               /*
-                * This case is search all ipp driver for finding.
-                * user application don't set ipp_id in this case,
-                * so ipp subsystem search correct driver in driver list.
-                */
                list_for_each_entry(ippdrv, &exynos_drm_ippdrv_list, drv_list) {
-                       if (ipp_check_dedicated(ippdrv, property->cmd)) {
-                               DRM_DEBUG_KMS("used device.\n");
-                               continue;
-                       }
-
-                       if (ippdrv->check_property &&
-                           ippdrv->check_property(ippdrv->dev, property)) {
-                               DRM_DEBUG_KMS("not support property.\n");
-                               continue;
-                       }
-
-                       return ippdrv;
+                       ret = ipp_check_driver(ippdrv, property);
+                       if (ret == 0)
+                               return ippdrv;
                }
 
-               DRM_ERROR("not support ipp driver operations.\n");
+               DRM_DEBUG("cannot find driver suitable for given property.\n");
        }
 
        return ERR_PTR(-ENODEV);