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From d1f7e9e87961139c7da9a570b1858a8841a32d6e Mon Sep 17 00:00:00 2001
From: Dave Stevenson <dave.stevenson@raspberrypi.com>
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 <dave.stevenson@raspberrypi.com>
---
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
@@ -872,19 +872,19 @@ 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 *user_mode,
+ struct drm_display_mode *adjusted_mode)
{
- struct drm_display_mode *mode = &encoder->crtc->state->adjusted_mode;
struct vc4_dsi_encoder *vc4_encoder = to_vc4_dsi_encoder(encoder);
struct vc4_dsi *dsi = vc4_encoder->dsi;
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;
@@ -1111,6 +1111,14 @@ 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)
@@ -1376,6 +1384,7 @@ 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 const struct vc4_dsi_variant bcm2711_dsi1_variant = {
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