This series is to add DSI PHY tuning support in Qualcomm Snapdragon SoCs with 10nm DSI PHY e.g. SC7180
In most cases the default values of DSI PHY tuning registers should be sufficient as they are fully optimized. However, in some cases (for example, where extreme board parasitics cause the eye shape to degrade), the override bits can be used to improve the signal quality.
As per the MSM DSI PHY (10nm) tuning guideline, the drive strength can be adjusted using DSIPHY_RESCODE_OFFSET_TOP & DSIPHY_RESCODE_OFFSET_BOT registers, and the drive level can be adjusted using DSIPHY_CMN_VREG_CTRL register.
Add DSI PHY tuning support for 10nm PHY. This can be extended to other DSI PHY versions if needed. Number of registers to configure the PHY tuning per lane can be different for different versions of the DSI PHY. I tried to make it generic so that it can be extended to other versions.
Rajeev Nandan (2): dt-bindings: msm/dsi: Add 10nm dsi phy tuning properties drm/msm/dsi: Add 10nm dsi phy tuning configuration support
.../bindings/display/msm/dsi-phy-10nm.yaml | 19 ++++++++ drivers/gpu/drm/msm/dsi/phy/dsi_phy.c | 55 ++++++++++++++++++++++ drivers/gpu/drm/msm/dsi/phy/dsi_phy.h | 23 +++++++++ drivers/gpu/drm/msm/dsi/phy/dsi_phy_10nm.c | 31 +++++++++--- 4 files changed, 122 insertions(+), 6 deletions(-)