drm/rockchip: vop use is_enabled instead of dpms mode

drm dpms have many power modes: ON,OFF,SUSPEND,STANDBY, etc.
but vop only have enable/disable mode, maybe case such bug:
 --> DRM_DPMS_ON: power on vop
 --> DRM_DPMS_SUSPEND: power off vop
 --> DRM_DPMS_OFF: already power off at SUSPEND, crash
so use a bool val is more suitable.

Signed-off-by: Mark Yao <mark.yao@rock-chips.com>

1 files changed, 18 insertions, 16 deletions

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
index 2b145ba5dc17..c75117a2f133 100644
--- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
+++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c
@@ -81,7 +81,7 @@ struct vop {
         struct drm_crtc crtc;
         struct device *dev;
         struct drm_device *drm_dev;
-        unsigned int dpms;
+        bool is_enabled;
 
         int connector_type;
         int connector_out_mode;
@@ -387,6 +387,9 @@ static void vop_enable(struct drm_crtc *crtc)
         struct vop *vop = to_vop(crtc);
         int ret;
 
+        if (vop->is_enabled)
+                return;
+
         ret = clk_enable(vop->hclk);
         if (ret < 0) {
                 dev_err(vop->dev, "failed to enable hclk - %d\n", ret);
@@ -427,6 +430,8 @@ static void vop_enable(struct drm_crtc *crtc)
 
         drm_vblank_on(vop->drm_dev, vop->pipe);
 
+        vop->is_enabled = true;
+
         return;
 
 err_disable_aclk:
@@ -441,6 +446,9 @@ static void vop_disable(struct drm_crtc *crtc)
 {
         struct vop *vop = to_vop(crtc);
 
+        if (!vop->is_enabled)
+                return;
+
         drm_vblank_off(crtc->dev, vop->pipe);
 
         disable_irq(vop->irq);
@@ -463,6 +471,8 @@ static void vop_disable(struct drm_crtc *crtc)
 
         clk_disable(vop->aclk);
         clk_disable(vop->hclk);
+
+        vop->is_enabled = false;
 }
 
 /*
@@ -742,7 +752,7 @@ static int vop_crtc_enable_vblank(struct drm_crtc *crtc)
         struct vop *vop = to_vop(crtc);
         unsigned long flags;
 
-        if (vop->dpms != DRM_MODE_DPMS_ON)
+        if (!vop->is_enabled)
                 return -EPERM;
 
         spin_lock_irqsave(&vop->irq_lock, flags);
@@ -759,8 +769,9 @@ static void vop_crtc_disable_vblank(struct drm_crtc *crtc)
         struct vop *vop = to_vop(crtc);
         unsigned long flags;
 
-        if (vop->dpms != DRM_MODE_DPMS_ON)
+        if (!vop->is_enabled)
                 return;
+
         spin_lock_irqsave(&vop->irq_lock, flags);
         vop_mask_write(vop, INTR_CTRL0, FS_INTR_MASK, FS_INTR_EN(0));
         spin_unlock_irqrestore(&vop->irq_lock, flags);
@@ -773,15 +784,8 @@ static const struct rockchip_crtc_funcs private_crtc_funcs = {
 
 static void vop_crtc_dpms(struct drm_crtc *crtc, int mode)
 {
-        struct vop *vop = to_vop(crtc);
-
         DRM_DEBUG_KMS("crtc[%d] mode[%d]\n", crtc->base.id, mode);
 
-        if (vop->dpms == mode) {
-                DRM_DEBUG_KMS("desired dpms mode is same as previous one.\n");
-                return;
-        }
-
         switch (mode) {
         case DRM_MODE_DPMS_ON:
                 vop_enable(crtc);
@@ -795,8 +799,6 @@ static void vop_crtc_dpms(struct drm_crtc *crtc, int mode)
                 DRM_DEBUG_KMS("unspecified mode %d\n", mode);
                 break;
         }
-
-        vop->dpms = mode;
 }
 
 static void vop_crtc_prepare(struct drm_crtc *crtc)
@@ -934,9 +936,9 @@ static int vop_crtc_page_flip(struct drm_crtc *crtc,
         struct drm_framebuffer *old_fb = crtc->primary->fb;
         int ret;
 
-        /* when the page flip is requested, crtc's dpms should be on */
-        if (vop->dpms > DRM_MODE_DPMS_ON) {
-                DRM_DEBUG("failed page flip request at dpms[%d].\n", vop->dpms);
+        /* when the page flip is requested, crtc should be on */
+        if (!vop->is_enabled) {
+                DRM_DEBUG("page flip request rejected because crtc is off.\n");
                 return 0;
         }
 
@@ -1302,7 +1304,7 @@ static int vop_initial(struct vop *vop)
 
         clk_disable(vop->hclk);
 
-        vop->dpms = DRM_MODE_DPMS_OFF;
+        vop->is_enabled = false;
 
         return 0;