On Mon, Mar 03, 2014 at 01:08:56PM -0600, Felipe Balbi wrote:

From: Darren Etheridge detheridge@ti.com

On resume the screen contents were not being restored properly. Looking at other DRM drivers it seems a call to drm_helper_resume_force_mode() is needed in the resume handler to force restoration of the mode and framebuffer data.

Signed-off-by: Darren Etheridge detheridge@ti.com

ping

---

drivers/gpu/drm/tilcdc/tilcdc_drv.c | 7 +++++++ 1 file changed, 7 insertions(+)

diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index 171a820..1a5ddfa 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -563,6 +563,13 @@ static int tilcdc_pm_resume(struct device *dev) if (registers[i].save && (priv->rev >= registers[i].rev)) tilcdc_write(ddev, registers[i].reg, priv->saved_register[n++]);

• /*

• * if this call isn't here, the display is blank on return from
  

• * suspend.  With this call here the contents of the framebuffer
  

• * during suspend are restored correctly.
  

• */
  

• drm_helper_resume_force_mode(ddev);

• drm_kms_helper_poll_enable(ddev);

  return 0;

-- 1.9.0

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