linux-kernel - [PATCH v2 0/2] drm/sun4i: dw-hdmi: Improve CEC support

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Message-Id: <20190401191513.23159-1-jernej.skrabec@siol.net>
Date:   Mon,  1 Apr 2019 21:15:11 +0200
From:   Jernej Skrabec <jernej.skrabec@...l.net>
To:     maxime.ripard@...tlin.com
Cc:     a.hajda@...sung.com, Laurent.pinchart@...asonboard.com,
        airlied@...ux.ie, daniel@...ll.ch, wens@...e.org,
        narmstrong@...libre.com, dri-devel@...ts.freedesktop.org,
        linux-kernel@...r.kernel.org, linux-arm-kernel@...ts.infradead.org
Subject: [PATCH v2 0/2] drm/sun4i: dw-hdmi: Improve CEC support

It turns out that additional logic between HDMI CEC controller and
pins on PHY on some Allwinner SoCs prevents proper communication.
It might be possible to fix it, but it's much easier and less error
prone to just directly drive pins using software implementation of
CEC protocol.

Let me know what do you think.

Best regards,
Jernej

Changes from v1:
- renamed is_cec_unusable to disable_cec
- added review-by tag

Jernej Skrabec (2):
  drm/bridge/synopsys: dw-hdmi: Add an option to suppress loading CEC
    driver
  drm/sun4i: dw-hdmi: Bit bang CEC on some SoCs

 drivers/gpu/drm/bridge/synopsys/dw-hdmi.c |  2 +-
 drivers/gpu/drm/sun4i/Kconfig             | 10 +++
 drivers/gpu/drm/sun4i/sun8i_dw_hdmi.h     | 11 +++
 drivers/gpu/drm/sun4i/sun8i_hdmi_phy.c    | 83 ++++++++++++++++++++++-
 include/drm/bridge/dw_hdmi.h              |  2 +
 5 files changed, 105 insertions(+), 3 deletions(-)

-- 
2.21.0