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