drm/panel: st7701: Add prepare_prev_first flag to drm_panel

BugLink: https://bugs.launchpad.net/bugs/2102266

[ Upstream commit 406dd4c7984a457567ca652455d5efad81983f02 ]

The DSI host must be enabled for the panel to be initialized in
prepare(). Set the prepare_prev_first flag to guarantee this.
This fixes the panel operation on NXP i.MX8MP SoC / Samsung DSIM
DSI host.

Fixes: 849b2e3ff9 ("drm/panel: Add Sitronix ST7701 panel driver")
Signed-off-by: Marek Vasut <marex@denx.de>
Reviewed-by: Jessica Zhang <quic_jesszhan@quicinc.com>
Link: https://lore.kernel.org/r/20241124224812.150263-1-marex@denx.de
Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20241124224812.150263-1-marex@denx.de
Signed-off-by: Sasha Levin <sashal@kernel.org>
[koichiroden: due to the absense of commit:
a055c91ac6ea ("drm/panel: st7701: Decouple DSI and DRM parts"),
the line addition was applied to st7701_dsi_probe() instead of
st7701_probe()]
Signed-off-by: Koichiro Den <koichiro.den@canonical.com>
Signed-off-by: Mehmet Basaran <mehmet.basaran@canonical.com>

This commit is contained in:

Marek Vasut

2025-03-14 12:03:09 +09:00

committed by

Mehmet Basaran

parent 321cc0da9b

commit d91eb712fe

1 changed files with 1 additions and 0 deletions

									
										drivers/gpu/drm/panel/panel-sitronix-st7701.c
									
		+1
		
												View File
												
				@@ -1010,6 +1010,7 @@ static int st7701_dsi_probe(struct mipi_dsi_device *dsi)

					drm_panel_init(&st7701->panel, &dsi->dev, &st7701_funcs,

						       DRM_MODE_CONNECTOR_DSI);

					st7701->panel.prepare_prev_first = true;

					/**

					 * Once sleep out has been issued, ST7701 IC required to wait 120ms