This is MT8173 HDMI 4K support PATCH v3, 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.
Changes since v2: - Remove the change about preparation for MT2701 support.
Changes since v1: - According to the suggestion from philipp, We use the new dpi0_sel rate set method. - calls clk_set_rate to set the dpi0_sel according to the pixel clock. - Remove the direct access to all the intermediate clock part. - Remove the intermediate tvdpll_d* clocks in dts. - According to suggestion from CK, we rename the clock parse function and remove it from mtk_dpi_conf struct. - Merges the hdmi Pll set rate for pixel clock greater than 165MHz and smaller parts.
The PATCH depends on the following patch: https://patchwork.kernel.org/patch/9249445/ (arm64: dts: mt8173: add mmsel clocks for 4K support)
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 | 8 +++-- drivers/gpu/drm/mediatek/mtk_hdmi.c | 17 ++++++---- drivers/gpu/drm/mediatek/mtk_mt8173_hdmi_phy.c | 42 +++++++++++++++++------- 3 files changed, 47 insertions(+), 20 deletions(-)