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drm: atmel-hlcdc: enable sys_clk during initalization.

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For SAM9X60 SoC, sys_clk is through lcd_gclk clock source and this
needs to be enabled before enabling lcd_clk.

Signed-off-by: Sandeep Sheriker Mallikarjun <sandeepsheriker.mallikarjun@microchip.com>
[claudiu.beznea@microchip.com: add fixed_clksrc checks]
Signed-off-by: Claudiu Beznea <claudiu.beznea@microchip.com>
Reviewed-by: Sam Ravnborg <sam@ravnborg.org>
Signed-off-by: Sam Ravnborg <sam@ravnborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/1556195748-11106-5-git-send-email-claudiu.beznea@microchip.com
This commit is contained in:
Sandeep Sheriker Mallikarjun 2019-04-25 12:36:30 +00:00 committed by Sam Ravnborg
parent e1dc68a4b1
commit 262d67e73f
1 changed files with 18 additions and 1 deletions
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19
drivers/gpu/drm/atmel-hlcdc/atmel_hlcdc_dc.c
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@ -625,10 +625,18 @@ static int atmel_hlcdc_dc_load(struct drm_device *dev)
dc->hlcdc = dev_get_drvdata(dev->dev->parent);
dev->dev_private = dc;
if (dc->desc->fixed_clksrc) {
ret = clk_prepare_enable(dc->hlcdc->sys_clk);
if (ret) {
dev_err(dev->dev, "failed to enable sys_clk\n");
goto err_destroy_wq;
}
}
ret = clk_prepare_enable(dc->hlcdc->periph_clk);
if (ret) {
dev_err(dev->dev, "failed to enable periph_clk\n");
goto err_destroy_wq;
goto err_sys_clk_disable;
}
pm_runtime_enable(dev->dev);
@ -664,6 +672,9 @@ static int atmel_hlcdc_dc_load(struct drm_device *dev)
err_periph_clk_disable:
pm_runtime_disable(dev->dev);
clk_disable_unprepare(dc->hlcdc->periph_clk);
err_sys_clk_disable:
if (dc->desc->fixed_clksrc)
clk_disable_unprepare(dc->hlcdc->sys_clk);
err_destroy_wq:
destroy_workqueue(dc->wq);
@ -688,6 +699,8 @@ static void atmel_hlcdc_dc_unload(struct drm_device *dev)
pm_runtime_disable(dev->dev);
clk_disable_unprepare(dc->hlcdc->periph_clk);
if (dc->desc->fixed_clksrc)
clk_disable_unprepare(dc->hlcdc->sys_clk);
destroy_workqueue(dc->wq);
}
@ -805,6 +818,8 @@ static int atmel_hlcdc_dc_drm_suspend(struct device *dev)
regmap_read(regmap, ATMEL_HLCDC_IMR, &dc->suspend.imr);
regmap_write(regmap, ATMEL_HLCDC_IDR, dc->suspend.imr);
clk_disable_unprepare(dc->hlcdc->periph_clk);
if (dc->desc->fixed_clksrc)
clk_disable_unprepare(dc->hlcdc->sys_clk);
return 0;
}
@ -814,6 +829,8 @@ static int atmel_hlcdc_dc_drm_resume(struct device *dev)
struct drm_device *drm_dev = dev_get_drvdata(dev);
struct atmel_hlcdc_dc *dc = drm_dev->dev_private;
if (dc->desc->fixed_clksrc)
clk_prepare_enable(dc->hlcdc->sys_clk);
clk_prepare_enable(dc->hlcdc->periph_clk);
regmap_write(dc->hlcdc->regmap, ATMEL_HLCDC_IER, dc->suspend.imr);