[PATCH 4.0 192/220] drm: adv7511: Fix DDC error interrupt handling

From: Greg Kroah-Hartman
Date: Sat May 02 2015 - 17:01:03 EST


4.0-stable review patch. If anyone has any objections, please let me know.

------------------

From: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>

commit 2e96206c4f952295e11c311fbb2a7aa2105024af upstream.

The DDC error interrupt bit is located in REG_INT1, not REG_INT0. Update
both the interrupt wait code and the interrupt sources reset code
accordingly.

Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@xxxxxxxxxxxxxxxx>
Signed-off-by: Greg Kroah-Hartman <gregkh@xxxxxxxxxxxxxxxxxxx>

---
drivers/gpu/drm/i2c/adv7511.c | 14 ++++++++++----
1 file changed, 10 insertions(+), 4 deletions(-)

--- a/drivers/gpu/drm/i2c/adv7511.c
+++ b/drivers/gpu/drm/i2c/adv7511.c
@@ -467,14 +467,16 @@ static int adv7511_get_edid_block(void *
block);
ret = adv7511_wait_for_interrupt(adv7511,
ADV7511_INT0_EDID_READY |
- ADV7511_INT1_DDC_ERROR, 200);
+ (ADV7511_INT1_DDC_ERROR << 8), 200);

if (!(ret & ADV7511_INT0_EDID_READY))
return -EIO;
}

regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
- ADV7511_INT0_EDID_READY | ADV7511_INT1_DDC_ERROR);
+ ADV7511_INT0_EDID_READY);
+ regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
+ ADV7511_INT1_DDC_ERROR);

/* Break this apart, hopefully more I2C controllers will
* support 64 byte transfers than 256 byte transfers
@@ -528,7 +530,9 @@ static int adv7511_get_modes(struct drm_
/* Reading the EDID only works if the device is powered */
if (adv7511->dpms_mode != DRM_MODE_DPMS_ON) {
regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
- ADV7511_INT0_EDID_READY | ADV7511_INT1_DDC_ERROR);
+ ADV7511_INT0_EDID_READY);
+ regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
+ ADV7511_INT1_DDC_ERROR);
regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
ADV7511_POWER_POWER_DOWN, 0);
adv7511->current_edid_segment = -1;
@@ -563,7 +567,9 @@ static void adv7511_encoder_dpms(struct
adv7511->current_edid_segment = -1;

regmap_write(adv7511->regmap, ADV7511_REG_INT(0),
- ADV7511_INT0_EDID_READY | ADV7511_INT1_DDC_ERROR);
+ ADV7511_INT0_EDID_READY);
+ regmap_write(adv7511->regmap, ADV7511_REG_INT(1),
+ ADV7511_INT1_DDC_ERROR);
regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
ADV7511_POWER_POWER_DOWN, 0);
/*


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