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The PHY requires us to wait for the PHY to switch to low power mode after deasserting TXPWRON and before asserting PDDQ in the power down sequence, otherwise power down will fail. The PHY power down can be monitored though the TX_READY bit, available through I2C in the PHY registers, or the TX_PHY_LOCK bit, available through the HDMI TX registers. As the two are equivalent, let's pick the easier solution of polling the TX_PHY_LOCK bit. The power down code is currently duplicated in multiple places. To avoid spreading multiple calls to a TX_PHY_LOCK poll function, we have to refactor the power down code and group it all in a single function. Tests showed that one poll iteration was enough for TX_PHY_LOCK to become low, without requiring any additional delay. Retrying the read five times with a 1ms to 2ms delay between each attempt should thus be more than enough. Signed-off-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> Tested-by: Neil Armstrong <narmstrong@baylibre.com> Reviewed-by: Jose Abreu <joabreu@synopsys.com> Signed-off-by: Archit Taneja <architt@codeaurora.org> Link: http://patchwork.freedesktop.org/patch/msgid/20170305233539.11898-1-laurent.pinchart+renesas@ideasonboard.com |
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| .. | ||
| adv7511 | ||
| analogix | ||
| analogix-anx78xx.c | ||
| analogix-anx78xx.h | ||
| dumb-vga-dac.c | ||
| dw-hdmi-ahb-audio.c | ||
| dw-hdmi-audio.h | ||
| dw-hdmi-i2s-audio.c | ||
| dw-hdmi.c | ||
| dw-hdmi.h | ||
| Kconfig | ||
| lvds-encoder.c | ||
| Makefile | ||
| megachips-stdpxxxx-ge-b850v3-fw.c | ||
| nxp-ptn3460.c | ||
| parade-ps8622.c | ||
| sii902x.c | ||
| sil-sii8620.c | ||
| sil-sii8620.h | ||
| tc358767.c | ||
| ti-tfp410.c | ||