As there is not corresponding clk_prepare_enable() for fsl_dev->pix_clk in previous contexts, clk_disable_unprepare() for fsl_dcu->pix_clk in suspend function will fail.
This patch will add clk_prepare_enable() for fsl_dev->pix_clk in previous contexts and resume function to fix the issue.
This patch is verified on LS1021ATWR board.
Signed-off-by: Alison Wang alison.wang@nxp.com --- drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 12 ++++++++++++ 1 file changed, 12 insertions(+)
diff --git a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c index 58e9e0601a61..875b0fdc4274 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c @@ -230,6 +230,12 @@ static int fsl_dcu_drm_pm_resume(struct device *dev) return ret; }
+ ret = clk_prepare_enable(fsl_dev->pix_clk); + if (ret < 0) { + dev_err(dev, "failed to enable dcu pix clk\n"); + return ret; + } + if (fsl_dev->tcon) fsl_tcon_bypass_enable(fsl_dev->tcon); fsl_dcu_drm_init_planes(fsl_dev->drm); @@ -351,6 +357,12 @@ static int fsl_dcu_drm_probe(struct platform_device *pdev) goto disable_clk; }
+ ret = clk_prepare_enable(fsl_dev->pix_clk); + if (ret < 0) { + dev_err(dev, "failed to enable dcu pix clk\n"); + return ret; + } + fsl_dev->tcon = fsl_tcon_init(dev);
drm = drm_dev_alloc(driver, dev);