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drm: bridge: samsung-dsim: enter display mode in the enable() callback

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The synaptics-r63353 (panel-bridge) can only be configured in command mode.
So, samsung-dsim (bridge) must not be in display mode during the
prepare()/unprepare() of the panel-bridge. Setting the
"pre_enable_prev_first" flag to true allows the prepare() of the
panel-bridge to be called between the pre_enabled() and enabled() of the
bridge. So, the bridge can enter display mode only in the enabled().
The unprepare() of the panel-bridge is instead called between the disable()
and post_disable() of the bridge. So, the disable() must exit the display
mode (i .e. enter command mode) to allow the panel-bridge to receive DSI
commands.

samsung_dsim_atomic_pre_enable   -> command mode
r63353_panel_prepare             -> send DSI commands
samsung_dsim_atomic_enable       -> enter display mode

samsung_dsim_atomic_disable      -> exit display mode (command mode)
r63353_panel_unprepare           -> send DSI commands
samsung_dsim_atomic_post_disable

Co-developed-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Michael Trimarchi <michael@amarulasolutions.com>
Signed-off-by: Dario Binacchi <dario.binacchi@amarulasolutions.com>
Reviewed-by: Robert Foss <rfoss@kernel.org>
Signed-off-by: Robert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20231218084354.508942-2-dario.binacchi@amarulasolutions.com
This commit is contained in:
Dario Binacchi
2023-12-18 09:43:37 +01:00
committed by Robert Foss
parent 8f04135c88
commit b2fe229262
1 changed files with 5 additions and 2 deletions
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7
drivers/gpu/drm/bridge/samsung-dsim.c
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@@ -1494,7 +1494,6 @@ static void samsung_dsim_atomic_pre_enable(struct drm_bridge *bridge,
return;
samsung_dsim_set_display_mode(dsi);
samsung_dsim_set_display_enable(dsi, true);
}
}
@@ -1507,6 +1506,7 @@ static void samsung_dsim_atomic_enable(struct drm_bridge *bridge,
samsung_dsim_set_display_mode(dsi);
samsung_dsim_set_display_enable(dsi, true);
} else {
samsung_dsim_set_display_enable(dsi, true);
samsung_dsim_set_stop_state(dsi, false);
}
@@ -1524,6 +1524,8 @@ static void samsung_dsim_atomic_disable(struct drm_bridge *bridge,
if (!samsung_dsim_hw_is_exynos(dsi->plat_data->hw_type))
samsung_dsim_set_stop_state(dsi, true);
samsung_dsim_set_display_enable(dsi, false);
dsi->state &= ~DSIM_STATE_VIDOUT_AVAILABLE;
}
@@ -1532,7 +1534,8 @@ static void samsung_dsim_atomic_post_disable(struct drm_bridge *bridge,
{
struct samsung_dsim *dsi = bridge_to_dsi(bridge);
samsung_dsim_set_display_enable(dsi, false);
if (!samsung_dsim_hw_is_exynos(dsi->plat_data->hw_type))
samsung_dsim_set_stop_state(dsi, true);
dsi->state &= ~DSIM_STATE_ENABLED;
pm_runtime_put_sync(dsi->dev);