On 2015?01?22? 15:33, Daniel Vetter wrote:
> On Thu, Jan 22, 2015 at 03:05:32PM +0800, Mark Yao wrote:
>> 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 at rock-chips.com>
> Long term I highly suggest you switch to atomic, since with atomic all the
> legacy dpms modes are remapped to a simple on/off. Also the new atomic
> helpers make sure that your backend isn't called multiple times, so you
> can ditch all your is_enabled tracking with that.
> -Daniel
Hi Daniel
is there some documents teach me how to switch to atomic easily?
I found many other drivers which use atomic also remap dpms modes to
simple on/off at its driver,
and I don't know where atomic helper do the remapped, can you give me
some suggestions?
- Mark.
>> ---
>> 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;
>>
>> --
>> 1.7.9.5
>>
>>
