diff options
| author | Alison Wang <b18965@freescale.com> | 2017-09-14 03:20:32 (GMT) |
|---|---|---|
| committer | Xie Xiaobo <xiaobo.xie@nxp.com> | 2017-09-25 07:25:50 (GMT) |
| commit | 618875870eace8f96e83b48cb1ceff2042db8109 (patch) | |
| tree | dddeea35075a8d5d5d3df0bf56dd603cfddce224 /drivers/gpu | |
| parent | 769f07937eb045292116074861d747610b31bba9 (diff) | |
| download | linux-618875870eace8f96e83b48cb1ceff2042db8109.tar.xz | |
drm/fsl-dcu: Fix DCU pixel clock issue in suspend/resume functions
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>
Diffstat (limited to 'drivers/gpu')
| -rw-r--r-- | drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c | 12 |
1 files changed, 12 insertions, 0 deletions
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 cc2fde2..b1b4ab3 100644 --- a/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c +++ b/drivers/gpu/drm/fsl-dcu/fsl_dcu_drm_drv.c @@ -263,6 +263,12 @@ 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); @@ -389,6 +395,12 @@ 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); |