Unverified Commit 5a67ec8c authored by Liu Ying's avatar Liu Ying Committed by Robert Foss
Browse files

drm/bridge: synopsys: dw-mipi-dsi: Add mode fixup support 



Vendor drivers may need to fixup mode due to pixel clock tree limitation,
so introduce the ->mode_fixup() callcack to struct dw_mipi_dsi_plat_data
and call it at atomic check stage if available.

Signed-off-by: default avatarLiu Ying <victor.liu@nxp.com>
Reviewed-by: default avatarRobert Foss <rfoss@kernel.org>
Signed-off-by: default avatarRobert Foss <rfoss@kernel.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20230821034008.3876938-5-victor.liu@nxp.com
parent d5116fb2

drivers/gpu/drm/bridge/synopsys/dw-mipi-dsi.c

+14 −0
Original line number Diff line number Diff line
@@ -573,9 +573,23 @@ static int dw_mipi_dsi_bridge_atomic_check(struct drm_bridge *bridge, 
					   struct drm_crtc_state *crtc_state,

					   struct drm_connector_state *conn_state)

{

	struct dw_mipi_dsi *dsi = bridge_to_dsi(bridge);

	const struct dw_mipi_dsi_plat_data *pdata = dsi->plat_data;

	bool ret;



	bridge_state->input_bus_cfg.flags =

		DRM_BUS_FLAG_DE_HIGH | DRM_BUS_FLAG_PIXDATA_SAMPLE_NEGEDGE;



	if (pdata->mode_fixup) {

		ret = pdata->mode_fixup(pdata->priv_data, &crtc_state->mode,

					&crtc_state->adjusted_mode);

		if (!ret) {

			DRM_DEBUG_DRIVER("failed to fixup mode " DRM_MODE_FMT "\n",

					 DRM_MODE_ARG(&crtc_state->mode));

			return -EINVAL;

		}

	}



	return 0;

}

include/drm/bridge/dw_mipi_dsi.h

+3 −0
Original line number Diff line number Diff line
@@ -59,6 +59,9 @@ struct dw_mipi_dsi_plat_data { 
					   unsigned long mode_flags,

					   u32 lanes, u32 format);



	bool (*mode_fixup)(void *priv_data, const struct drm_display_mode *mode,

			   struct drm_display_mode *adjusted_mode);



	u32 *(*get_input_bus_fmts)(void *priv_data,

				   struct drm_bridge *bridge,

				   struct drm_bridge_state *bridge_state,