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 --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 34 ++++++++++++++------------- 1 file 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 9a5c571..f278c09 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 = false; + 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;

there is a Bug that: vop_enable()->drm_vblank_on, drm_vblank_on may call vop enable vblank. if it happen, vblank enable would failed, then cause irq status error. because is_enabled value is set after drm_vblank_on.

after enable vop clocks and iommu regs, we can sure that R/W vop regs and do vop plane flip is safe, so place is_enabled = true after enable iommu is suitable.

Signed-off-by: Mark Yao mark.yao@rock-chips.com --- drivers/gpu/drm/rockchip/rockchip_drm_vop.c | 11 +++++++---- 1 file changed, 7 insertions(+), 4 deletions(-)

diff --git a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c index f278c09..a009457 100644 --- a/drivers/gpu/drm/rockchip/rockchip_drm_vop.c +++ b/drivers/gpu/drm/rockchip/rockchip_drm_vop.c @@ -420,6 +420,11 @@ static void vop_enable(struct drm_crtc *crtc) goto err_disable_aclk; }

+ /* + * At here, vop clock & iommu is enable, R/W vop regs would be safe. + */ + vop->is_enabled = false; + spin_lock(&vop->reg_lock);

VOP_CTRL_SET(vop, standby, 0); @@ -430,8 +435,6 @@ static void vop_enable(struct drm_crtc *crtc)

drm_vblank_on(vop->drm_dev, vop->pipe);

- vop->is_enabled = false; - return;

err_disable_aclk: @@ -462,6 +465,8 @@ static void vop_disable(struct drm_crtc *crtc) VOP_CTRL_SET(vop, standby, 1);

spin_unlock(&vop->reg_lock); + + vop->is_enabled = false; /* * disable dclk to stop frame scan, so we can safely detach iommu, */ @@ -471,8 +476,6 @@ static void vop_disable(struct drm_crtc *crtc)

clk_disable(vop->aclk); clk_disable(vop->hclk); - - vop->is_enabled = false; }

/*