This is MT8173 HDMI 4K support PATCH, based on 4.7-rc1.
In order to support HDMI 4K on MT8173, we have to make some modifications. 1) Make sure that mtk_hdmi_send_infoframe is sent successfully. 2) Enhance the HDMI driving current to improve performance. 3) Make sure that pixel clock is 297MHz when resolution is 4K. 4) Adjust VENCPLL clock.
Bibby Hsieh (1): drm/mediatek: adjust VENCPLL clock for 4K HDMI output
Junzhi Zhao (3): drm/mediatek: do mtk_hdmi_send_infoframe after HDMI clock enable drm/mediatek: enhance the HDMI driving current drm/mediatek: fix the wrong pixel clock when resolution is 4K
drivers/gpu/drm/mediatek/mtk_dpi.c | 184 +++++++++++++++++------- drivers/gpu/drm/mediatek/mtk_drm_drv.c | 9 ++ drivers/gpu/drm/mediatek/mtk_drm_drv.h | 1 + drivers/gpu/drm/mediatek/mtk_hdmi.c | 19 ++- drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c | 89 ++++++++---- 5 files changed, 216 insertions(+), 86 deletions(-)