From 741c3aeb82c78e173aa7155aaffb971e5c73ab3c Mon Sep 17 00:00:00 2001 From: Philippe CORNU Date: Thu, 25 Jan 2018 16:55:04 +0100 Subject: [PATCH] drm/bridge/synopsys: dsi: use adjusted_mode in mode_set MIME-Version: 1.0 Content-Type: text/plain; charset=UTF-8 Content-Transfer-Encoding: 8bit The "adjusted_mode" clock value (ie the real pixel clock) is more accurate than "mode" clock value (ie the panel/bridge requested clock value). It offers a better preciseness for timing computations and allows to reduce the extra dsi bandwidth in burst mode (from ~20% to ~10-12%, hw platform dependent). Signed-off-by: Philippe Cornu Tested-by: Brian Norris Reviewed-by: Yannick Fertré Tested-by: Yannick Fertré Signed-off-by: Andrzej Hajda Link: https://patchwork.freedesktop.org/patch/msgid/20180125155504.8611-1-philippe.cornu@st.com --- drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c | 12 ++++++------ 1 file changed, 6 insertions(+), 6 deletions(-) diff --git a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c index 0c7ecf798874..fd7999642cf8 100644 --- a/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c +++ b/drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c @@ -771,20 +771,20 @@ static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge, clk_prepare_enable(dsi->pclk); - ret = phy_ops->get_lane_mbps(priv_data, mode, dsi->mode_flags, + ret = phy_ops->get_lane_mbps(priv_data, adjusted_mode, dsi->mode_flags, dsi->lanes, dsi->format, &dsi->lane_mbps); if (ret) DRM_DEBUG_DRIVER("Phy get_lane_mbps() failed\n"); pm_runtime_get_sync(dsi->dev); dw_mipi_dsi_init(dsi); - dw_mipi_dsi_dpi_config(dsi, mode); + dw_mipi_dsi_dpi_config(dsi, adjusted_mode); dw_mipi_dsi_packet_handler_config(dsi); dw_mipi_dsi_video_mode_config(dsi); - dw_mipi_dsi_video_packet_config(dsi, mode); + dw_mipi_dsi_video_packet_config(dsi, adjusted_mode); dw_mipi_dsi_command_mode_config(dsi); - dw_mipi_dsi_line_timer_config(dsi, mode); - dw_mipi_dsi_vertical_timing_config(dsi, mode); + dw_mipi_dsi_line_timer_config(dsi, adjusted_mode); + dw_mipi_dsi_vertical_timing_config(dsi, adjusted_mode); dw_mipi_dsi_dphy_init(dsi); dw_mipi_dsi_dphy_timing_config(dsi); @@ -798,7 +798,7 @@ static void dw_mipi_dsi_bridge_mode_set(struct drm_bridge *bridge, dw_mipi_dsi_dphy_enable(dsi); - dw_mipi_dsi_wait_for_two_frames(mode); + dw_mipi_dsi_wait_for_two_frames(adjusted_mode); /* Switch to cmd mode for panel-bridge pre_enable & panel prepare */ dw_mipi_dsi_set_mode(dsi, 0);