From: Abhinav Kumar <[email protected]> As per the hardware programming guide, MST_FIFO_CONSTANT_FILL must always be programmed when operating in MST mode. Ensure the register is configured accordingly.
Signed-off-by: Abhinav Kumar <[email protected]> Signed-off-by: Yongxing Mou <[email protected]> Reviewed-by: Dmitry Baryshkov <[email protected]> --- drivers/gpu/drm/msm/dp/dp_ctrl.c | 2 ++ drivers/gpu/drm/msm/dp/dp_panel.c | 12 ++++++++++++ drivers/gpu/drm/msm/dp/dp_panel.h | 2 ++ 3 files changed, 16 insertions(+) diff --git a/drivers/gpu/drm/msm/dp/dp_ctrl.c b/drivers/gpu/drm/msm/dp/dp_ctrl.c index c4f1a68b1210..80116e19fbbf 100644 --- a/drivers/gpu/drm/msm/dp/dp_ctrl.c +++ b/drivers/gpu/drm/msm/dp/dp_ctrl.c @@ -677,6 +677,8 @@ static void msm_dp_ctrl_configure_source_params(struct msm_dp_ctrl_private *ctrl msm_dp_ctrl_config_misc1_misc0(ctrl, panel); msm_dp_panel_timing_cfg(panel, ctrl->msm_dp_ctrl.wide_bus_en); + + msm_dp_panel_mst_async_fifo(panel, ctrl->mst_active); } /* diff --git a/drivers/gpu/drm/msm/dp/dp_panel.c b/drivers/gpu/drm/msm/dp/dp_panel.c index cbbcc0dbf652..ba5ee2ad8924 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.c +++ b/drivers/gpu/drm/msm/dp/dp_panel.c @@ -741,6 +741,18 @@ int msm_dp_panel_timing_cfg(struct msm_dp_panel *msm_dp_panel, bool wide_bus_en) return 0; } +void msm_dp_panel_mst_async_fifo(struct msm_dp_panel *msm_dp_panel, bool mst_en) +{ + struct msm_dp_panel_private *panel; + + panel = container_of(msm_dp_panel, struct msm_dp_panel_private, msm_dp_panel); + + if (mst_en) + msm_dp_write_pn(panel, MMSS_DP_ASYNC_FIFO_CONFIG, 0x01); + else + msm_dp_write_pn(panel, MMSS_DP_ASYNC_FIFO_CONFIG, 0x00); +} + int msm_dp_panel_init_panel_info(struct msm_dp_panel *msm_dp_panel, const struct drm_display_mode *adjusted_mode, u32 bpp) diff --git a/drivers/gpu/drm/msm/dp/dp_panel.h b/drivers/gpu/drm/msm/dp/dp_panel.h index 3e78af9e430d..edc39ee5268e 100644 --- a/drivers/gpu/drm/msm/dp/dp_panel.h +++ b/drivers/gpu/drm/msm/dp/dp_panel.h @@ -73,6 +73,8 @@ void msm_dp_panel_clear_dsc_dto(struct msm_dp_panel *msm_dp_panel); void msm_dp_panel_enable_vsc_sdp(struct msm_dp_panel *msm_dp_panel, struct dp_sdp *vsc_sdp); void msm_dp_panel_disable_vsc_sdp(struct msm_dp_panel *msm_dp_panel); +void msm_dp_panel_mst_async_fifo(struct msm_dp_panel *msm_dp_panel, bool mst_en); + /** * is_link_rate_valid() - validates the link rate * @bw_code: link rate requested by the sink -- 2.43.0
