Commit 609252ea authored by Shuijing Li's avatar Shuijing Li Committed by Chun-Kuang Hu
Browse files

drm/mediatek: dsi: Add mode_valid callback to DSI bridge 



Support IGT (Intel GPU Tools) in Mediatek DSI driver.
According to the description of MIPI Alliance Specification for D-PHY
Version 1.1, the maximum supported data rate is 1.5Gbps, so add mode_valid
callback to dsi bridge to filter out the data rate exceeding the
Specification.

Signed-off-by: default avatarShuijing Li <shuijing.li@mediatek.com>
Reviewed-by: default avatarCK Hu <ck.hu@mediatek.com>
Link: https://patchwork.kernel.org/project/dri-devel/patch/20230823092047.32258-1-shuijing.li@mediatek.com/


Signed-off-by: default avatarChun-Kuang Hu <chunkuang.hu@kernel.org>
parent fcaf9761

drivers/gpu/drm/mediatek/mtk_dsi.c

+20 −0
Original line number Diff line number Diff line
@@ -808,6 +808,25 @@ static void mtk_dsi_bridge_atomic_post_disable(struct drm_bridge *bridge, 
	mtk_dsi_poweroff(dsi);

}



static enum drm_mode_status

mtk_dsi_bridge_mode_valid(struct drm_bridge *bridge,

			  const struct drm_display_info *info,

			  const struct drm_display_mode *mode)

{

	struct mtk_dsi *dsi = bridge_to_dsi(bridge);

	u32 bpp;



	if (dsi->format == MIPI_DSI_FMT_RGB565)

		bpp = 16;

	else

		bpp = 24;



	if (mode->clock * bpp / dsi->lanes > 1500000)

		return MODE_CLOCK_HIGH;



	return MODE_OK;

}



static const struct drm_bridge_funcs mtk_dsi_bridge_funcs = {

	.attach = mtk_dsi_bridge_attach,

	.atomic_destroy_state = drm_atomic_helper_bridge_destroy_state,
@@ -817,6 +836,7 @@ static const struct drm_bridge_funcs mtk_dsi_bridge_funcs = { 
	.atomic_pre_enable = mtk_dsi_bridge_atomic_pre_enable,

	.atomic_post_disable = mtk_dsi_bridge_atomic_post_disable,

	.atomic_reset = drm_atomic_helper_bridge_reset,

	.mode_valid = mtk_dsi_bridge_mode_valid,

	.mode_set = mtk_dsi_bridge_mode_set,

};