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| author | Sébastien Szymanski <sebastien.szymanski@armadeus.com> | 2017-08-01 12:40:07 +0200 |
|---|---|---|
| committer | Stephen Boyd <sboyd@codeaurora.org> | 2017-11-02 08:25:34 +0100 |
| commit | c68ee58d9ee7b856ac722f18f4f26579c8fbd2b4 (patch) | |
| tree | 0280e30df635754d7d8dd875722861f363d86cbc /drivers/of | |
| parent | Linux 4.14-rc1 (diff) | |
| download | linux-c68ee58d9ee7b856ac722f18f4f26579c8fbd2b4.tar.xz linux-c68ee58d9ee7b856ac722f18f4f26579c8fbd2b4.zip | |
clk: imx6: refine hdmi_isfr's parent to make HDMI work on i.MX6 SoCs w/o VPU
On i.MX6 SoCs without VPU (in my case MCIMX6D4AVT10AC), the hdmi driver
fails to probe:
[ 2.540030] dwhdmi-imx 120000.hdmi: Unsupported HDMI controller
(0000:00:00)
[ 2.548199] imx-drm display-subsystem: failed to bind 120000.hdmi
(ops dw_hdmi_imx_ops): -19
[ 2.557403] imx-drm display-subsystem: master bind failed: -19
That's because hdmi_isfr's parent, video_27m, is not correctly ungated.
As explained in commit 5ccc248cc537 ("ARM: imx6q: clk: Add support for
mipi_core_cfg clock as a shared clock gate"), video_27m is gated by
CCM_CCGR3[CG8].
On i.MX6 SoCs with VPU, the hdmi is working thanks to the
CCM_CMEOR[mod_en_ov_vpu] bit which makes the video_27m ungated whatever
is in CCM_CCGR3[CG8]. The issue can be reproduced by setting
CCMEOR[mod_en_ov_vpu] to 0.
Make the HDMI work in every case by setting hdmi_isfr's parent to
mipi_core_cfg.
Signed-off-by: Sébastien Szymanski <sebastien.szymanski@armadeus.com>
Reviewed-by: Fabio Estevam <fabio.estevam@nxp.com>
Signed-off-by: Stephen Boyd <sboyd@codeaurora.org>
Diffstat (limited to 'drivers/of')
0 files changed, 0 insertions, 0 deletions