On Fri, Mar 07, 2025 at 06:16:33PM +0800, Yongbang Shi wrote: > From: Baihan Li <libaihan@xxxxxxxxxx> > > This dp controller need features of digital-to-analog conversion and > high-speed transmission in chip by its extern serdes controller. Our > serdes cfg is relatively simple, just need two register configurations. > Don't need too much functions, like: power on/off, initialize, and some > complex configurations, so I'm not going to use the phy framework. > This serdes is inited and configured in dp initialization, and also > integrating them into link training process. > > For rate changing, we can change from 1.62-8.2Gpbs by cfg reg. > For voltage and pre-emphasis levels changing, we can cfg different > serdes ffe value. > > Signed-off-by: Baihan Li <libaihan@xxxxxxxxxx> > Signed-off-by: Yongbang Shi <shiyongbang@xxxxxxxxxx> > --- > ChangeLog: > v3 -> v4: > - fix the serdes cfg in hibmc_dp_serdes_set_tx_cfg(), suggested by Dmitry Baryshkov. > - move the dp serdes registers to dp_reg.h, suggested by Dmitry Baryshkov. > - > v2 -> v3: > - add commit log about dp serdes, suggested by Dmitry Baryshkov. > - return value in hibmc_dp_serdes_init(), suggested by Dmitry Baryshkov. > - add static const in the array of serdes_tx_cfg[], suggested by Dmitry Baryshkov. > - change drm_warn to drm_dbg_dp, suggested by Dmitry Baryshkov. > - add explanations about dp serdes macros, suggested by Dmitry Baryshkov. > v1 -> v2: > - splittting the patch and add more detailed the changes in the commit message, suggested by Dmitry Baryshkov. > - changing all names of dp phy to dp serdes. > --- > drivers/gpu/drm/hisilicon/hibmc/Makefile | 2 +- > drivers/gpu/drm/hisilicon/hibmc/dp/dp_comm.h | 4 ++ > drivers/gpu/drm/hisilicon/hibmc/dp/dp_hw.c | 5 ++ > drivers/gpu/drm/hisilicon/hibmc/dp/dp_reg.h | 23 ++++++ > .../gpu/drm/hisilicon/hibmc/dp/dp_serdes.c | 71 +++++++++++++++++++ > 5 files changed, 104 insertions(+), 1 deletion(-) > create mode 100644 drivers/gpu/drm/hisilicon/hibmc/dp/dp_serdes.c > Reviewed-by: Dmitry Baryshkov <dmitry.baryshkov@xxxxxxxxxx> -- With best wishes Dmitry
