diff options
Diffstat (limited to 'drivers/gpu/drm/tilcdc')
| -rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_drv.c | 23 | ||||
| -rw-r--r-- | drivers/gpu/drm/tilcdc/tilcdc_drv.h | 1 |
2 files changed, 18 insertions, 6 deletions
diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.c b/drivers/gpu/drm/tilcdc/tilcdc_drv.c index 420a237..67ed9f7 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.c +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.c @@ -582,13 +582,20 @@ static int tilcdc_pm_suspend(struct device *dev) drm_kms_helper_poll_disable(ddev); + /* Select sleep pin state */ + pinctrl_pm_select_sleep_state(dev); + + if (pm_runtime_suspended(dev)) { + priv->ctx_valid = false; + return 0; + } + /* Save register state: */ for (i = 0; i < ARRAY_SIZE(registers); i++) if (registers[i].save && (priv->rev >= registers[i].rev)) priv->saved_register[n++] = tilcdc_read(ddev, registers[i].reg); - /* Select sleep pin state */ - pinctrl_pm_select_sleep_state(dev); + priv->ctx_valid = true; return 0; } @@ -602,10 +609,14 @@ static int tilcdc_pm_resume(struct device *dev) /* Select default pin state */ pinctrl_pm_select_default_state(dev); - /* Restore register state: */ - for (i = 0; i < ARRAY_SIZE(registers); i++) - if (registers[i].save && (priv->rev >= registers[i].rev)) - tilcdc_write(ddev, registers[i].reg, priv->saved_register[n++]); + if (priv->ctx_valid == true) { + /* Restore register state: */ + for (i = 0; i < ARRAY_SIZE(registers); i++) + if (registers[i].save && + (priv->rev >= registers[i].rev)) + tilcdc_write(ddev, registers[i].reg, + priv->saved_register[n++]); + } drm_kms_helper_poll_enable(ddev); diff --git a/drivers/gpu/drm/tilcdc/tilcdc_drv.h b/drivers/gpu/drm/tilcdc/tilcdc_drv.h index 62a1d68..55d17b3 100644 --- a/drivers/gpu/drm/tilcdc/tilcdc_drv.h +++ b/drivers/gpu/drm/tilcdc/tilcdc_drv.h @@ -67,6 +67,7 @@ struct tilcdc_drm_private { /* register contents saved across suspend/resume: */ u32 saved_register[12]; + bool ctx_valid; #ifdef CONFIG_CPU_FREQ struct notifier_block freq_transition; |