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drm/fsl-dcu: do not update when modifying irq registers
The IRQ status and mask registers are not "double buffered" according to the reference manual. Hence, there is no extra transfer/update write needed when modifying these registers. Signed-off-by: Stefan Agner <stefan@agner.ch>
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1 changed files with 0 additions and 4 deletions
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@ -59,8 +59,6 @@ static int fsl_dcu_drm_irq_init(struct drm_device *dev)
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regmap_write(fsl_dev->regmap, DCU_INT_STATUS, 0);
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regmap_write(fsl_dev->regmap, DCU_INT_MASK, ~0);
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regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
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DCU_UPDATE_MODE_READREG);
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return ret;
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}
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@ -139,8 +137,6 @@ static irqreturn_t fsl_dcu_drm_irq(int irq, void *arg)
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drm_handle_vblank(dev, 0);
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regmap_write(fsl_dev->regmap, DCU_INT_STATUS, int_status);
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regmap_write(fsl_dev->regmap, DCU_UPDATE_MODE,
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DCU_UPDATE_MODE_READREG);
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return IRQ_HANDLED;
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}
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