From 5590c79c417064363236f24ffe40d87d6cfd128e Mon Sep 17 00:00:00 2001 From: Dave Stevenson Date: Mon, 7 Feb 2022 17:14:51 +0000 Subject: [PATCH] drm/vc4: Move DSI initialisation to encoder_mode_set. Breaking the bridge chain does not work for atomic bridges/panels and generally causes issues. We need to initialise the DSI host before the bridge pre_enables are called, so move that to encoder_mode_set in the same way that dw-mipi-dsi does. Signed-off-by: Dave Stevenson --- drivers/gpu/drm/vc4/vc4_dsi.c | 17 +++++++++++++---- 1 file changed, 13 insertions(+), 4 deletions(-) --- a/drivers/gpu/drm/vc4/vc4_dsi.c +++ b/drivers/gpu/drm/vc4/vc4_dsi.c @@ -867,18 +867,18 @@ static bool vc4_dsi_encoder_mode_fixup(s return true; } -static void vc4_dsi_encoder_enable(struct drm_encoder *encoder) +static void vc4_dsi_encoder_mode_set(struct drm_encoder *encoder, + struct drm_display_mode *mode, + struct drm_display_mode *adjusted_mode) { - struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode; struct vc4_dsi *dsi = to_vc4_dsi(encoder); struct device *dev = &dsi->pdev->dev; bool debug_dump_regs = false; - struct drm_bridge *iter; unsigned long hs_clock; u32 ui_ns; /* Minimum LP state duration in escape clock cycles. */ u32 lpx = dsi_esc_timing(60); - unsigned long pixel_clock_hz = mode->clock * 1000; + unsigned long pixel_clock_hz = adjusted_mode->clock * 1000; unsigned long dsip_clock; unsigned long phy_clock; int ret; @@ -1105,6 +1105,14 @@ static void vc4_dsi_encoder_enable(struc ~DSI_PORT_BIT(PHY_AFEC0_RESET)); vc4_dsi_ulps(dsi, false); +} + +static void vc4_dsi_encoder_enable(struct drm_encoder *encoder) +{ + struct vc4_dsi_encoder *vc4_encoder = to_vc4_dsi_encoder(encoder); + struct vc4_dsi *dsi = vc4_encoder->dsi; + bool debug_dump_regs = false; + struct drm_bridge *iter; list_for_each_entry_reverse(iter, &dsi->bridge_chain, chain_node) { if (iter->funcs->pre_enable) @@ -1370,6 +1378,7 @@ static const struct drm_encoder_helper_f .disable = vc4_dsi_encoder_disable, .enable = vc4_dsi_encoder_enable, .mode_fixup = vc4_dsi_encoder_mode_fixup, + .mode_set = vc4_dsi_encoder_mode_set, }; static int vc4_dsi_late_register(struct drm_encoder *encoder)