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drm: renesas: rz-du: Add atomic_pre_enable

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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.brandt@renesas.com>
Tested-by: Hugo Villeneuve <hvilleneuve@dimonoff.com>
Reviewed-by: Biju Das <biju.das.jz@bp.renesas.com>
Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com>
Link: https://lore.kernel.org/r/20250521210335.3149065-1-chris.brandt@renesas.com
This commit is contained in:
Chris Brandt
2025-05-21 17:03:35 -04:00
committed by Biju Das
parent 9e0f93f7af
commit 5ce16c169a
1 changed files with 10 additions and 2 deletions
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12
drivers/gpu/drm/renesas/rz-du/rzg2l_mipi_dsi.c
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@@ -532,8 +532,8 @@ static int rzg2l_mipi_dsi_attach(struct drm_bridge *bridge,
flags);
}
static void rzg2l_mipi_dsi_atomic_enable(struct drm_bridge *bridge,
struct drm_atomic_state *state)
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);
const struct drm_display_mode *mode;
@@ -550,6 +550,13 @@ 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)
@@ -593,6 +600,7 @@ 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,