Sorry, ignore this version.
The local variables are wrong.
I'll submit a V2.....
Chris
-----Original Message-----
From: Chris Brandt <chris.bra...@renesas.com>
Sent: Wednesday, May 21, 2025 10:24 AM
To: Biju Das <biju.das...@bp.renesas.com>; Maarten Lankhorst
<maarten.lankho...@linux.intel.com>; Maxime Ripard <mrip...@kernel.org>; Thomas
Zimmermann <tzimmerm...@suse.de>; David Airlie <airl...@gmail.com>; Simona
Vetter <sim...@ffwll.ch>; Hien Huynh <hien.huynh...@renesas.com>; Hugo
Villeneuve <h...@hugovil.com>
Cc: dri-devel@lists.freedesktop.org; linux-renesas-...@vger.kernel.org; Chris
Brandt <chris.bra...@renesas.com>
Subject: [PATCH] drm: renesas: rz-du: Add atomic_pre_enable
When drm_panel.prepare_prev_first is set to true in a panel driver, the
panel expects the MIPI DSI hardware to be already configured before the
panel's prepare function is called because it might need to send DCS
commands.
Signed-off-by: Chris Brandt <chris.bra...@renesas.com>
---
drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c | 10 +++++++++-
1 file changed, 9 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
index 4550c6d84796..b31affddfc81 100644
--- a/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
+++ b/drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
@@ -531,7 +531,7 @@ static int rzg2l_mipi_dsi_attach(struct drm_bridge *bridge,
flags);
}
-static void rzg2l_mipi_dsi_atomic_enable(struct drm_bridge *bridge,
+static void rzg2l_mipi_dsi_atomic_pre_enable(struct drm_bridge *bridge,
struct drm_atomic_state *state)
{
struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
@@ -549,6 +549,13 @@ static void rzg2l_mipi_dsi_atomic_enable(struct drm_bridge
*bridge,
return;
rzg2l_mipi_dsi_set_display_timing(dsi, mode);
+}
+
+static void rzg2l_mipi_dsi_atomic_enable(struct drm_bridge *bridge,
+ struct drm_atomic_state *state)
+{
+ struct rzg2l_mipi_dsi *dsi = bridge_to_rzg2l_mipi_dsi(bridge);
+ int ret;
ret = rzg2l_mipi_dsi_start_hs_clock(dsi);
if (ret < 0)
@@ -592,6 +599,7 @@ static const struct drm_bridge_funcs
rzg2l_mipi_dsi_bridge_ops = {
.atomic_duplicate_state = drm_atomic_helper_bridge_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
.atomic_reset = drm_atomic_helper_bridge_reset,
+ .atomic_pre_enable = rzg2l_mipi_dsi_atomic_pre_enable,
.atomic_enable = rzg2l_mipi_dsi_atomic_enable,
.atomic_disable = rzg2l_mipi_dsi_atomic_disable,
.mode_valid = rzg2l_mipi_dsi_bridge_mode_valid,
--
2.34.1
