drm/bridge: adv7511: Reuse __adv7511_power_on/off() when probing EDID

Thus this patch changes the EDID probing logic so that we
re-use the __adv7511_power_on/off() calls instead of duplciating
logic.

This does change behavior slightly as it adds the HPD signal
pulse to the EDID probe path, but Archit has had a patch to
add HPD signal pulse to the EDID probe path before, so this
should address the cases where that helped. Another difference
is that regcache_mark_dirty() is also called in the power off
path once EDID is probed.

Cc: David Airlie <airlied@linux.ie>
Cc: Archit Taneja <architt@codeaurora.org>
Cc: Wolfram Sang <wsa+renesas@sang-engineering.com>
Cc: Lars-Peter Clausen <lars@metafoo.de>
Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Cc: dri-devel@lists.freedesktop.org
Reviewed-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Tested-by: Laurent Pinchart <laurent.pinchart@ideasonboard.com>
Signed-off-by: John Stultz <john.stultz@linaro.org>
Signed-off-by: Archit Taneja <architt@codeaurora.org>
Link: http://patchwork.freedesktop.org/patch/msgid/1484614372-15342-6-git-send-email-john.stultz@linaro.org

diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
index 545ceff..17b9e98 100644 (file)
--- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
+++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c
@@ -573,24 +573,13 @@ static int adv7511_get_modes(struct adv7511 *adv7511,
        unsigned int count;
 
        /* Reading the EDID only works if the device is powered */
-       if (!adv7511->powered) {
-               regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
-                                  ADV7511_POWER_POWER_DOWN, 0);
-               if (adv7511->i2c_main->irq) {
-                       regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(0),
-                                    ADV7511_INT0_EDID_READY);
-                       regmap_write(adv7511->regmap, ADV7511_REG_INT_ENABLE(1),
-                                    ADV7511_INT1_DDC_ERROR);
-               }
-               adv7511->current_edid_segment = -1;
-       }
+       if (!adv7511->powered)
+               __adv7511_power_on(adv7511);
 
        edid = drm_do_get_edid(connector, adv7511_get_edid_block, adv7511);
 
        if (!adv7511->powered)
-               regmap_update_bits(adv7511->regmap, ADV7511_REG_POWER,
-                                  ADV7511_POWER_POWER_DOWN,
-                                  ADV7511_POWER_POWER_DOWN);
+               __adv7511_power_off(adv7511);
 
        kfree(adv7511->edid);
        adv7511->edid = edid;