Add a helper to get ExtDst source selection. This is needed by disabling CRTC at boot in an upcoming commit which tries to get the source selection.
Reviewed-by: Frank Li <[email protected]> Acked-by: Maxime Ripard <[email protected]> Signed-off-by: Liu Ying <[email protected]> -- v7: - Collect Maxime's A-b tag. - Check regmap_read()'s return valure. (Sashiko AI bot) v2: - Collect Frank's R-b tag. --- drivers/gpu/drm/imx/dc/dc-ed.c | 29 +++++++++++++++++++++++++++++ drivers/gpu/drm/imx/dc/dc-pe.h | 1 + 2 files changed, 30 insertions(+) diff --git a/drivers/gpu/drm/imx/dc/dc-ed.c b/drivers/gpu/drm/imx/dc/dc-ed.c index de1b71315eab..67163dca1363 100644 --- a/drivers/gpu/drm/imx/dc/dc-ed.c +++ b/drivers/gpu/drm/imx/dc/dc-ed.c @@ -149,6 +149,35 @@ void dc_ed_pec_src_sel(struct dc_ed *ed, enum dc_link_id src) } } +int dc_ed_pec_src_sel_get(struct dc_ed *ed, enum dc_link_id *src) +{ + u32 val; + int ret; + + ret = regmap_read(ed->reg_pec, PIXENGCFG_DYNAMIC, &val); + if (ret) + return -EINVAL; + + switch (val) { + case LINK_ID_NONE: + case LINK_ID_CONSTFRAME0: + case LINK_ID_CONSTFRAME4: + case LINK_ID_CONSTFRAME1: + case LINK_ID_CONSTFRAME5: + case LINK_ID_FETCHWARP2: + case LINK_ID_FETCHLAYER0: + case LINK_ID_LAYERBLEND0: + case LINK_ID_LAYERBLEND1: + case LINK_ID_LAYERBLEND2: + case LINK_ID_LAYERBLEND3: + *src = val; + dev_dbg(ed->dev, "get source selection: 0x%02x\n", val); + return 0; + default: + return -EINVAL; + } +} + void dc_ed_pec_sync_trigger(struct dc_ed *ed) { regmap_write(ed->reg_pec, PIXENGCFG_TRIGGER, SYNC_TRIGGER); diff --git a/drivers/gpu/drm/imx/dc/dc-pe.h b/drivers/gpu/drm/imx/dc/dc-pe.h index f5e01a6eb9e9..0b81dc6b251c 100644 --- a/drivers/gpu/drm/imx/dc/dc-pe.h +++ b/drivers/gpu/drm/imx/dc/dc-pe.h @@ -85,6 +85,7 @@ void dc_cf_init(struct dc_cf *cf); /* External Destination Unit */ void dc_ed_pec_src_sel(struct dc_ed *ed, enum dc_link_id src); +int dc_ed_pec_src_sel_get(struct dc_ed *ed, enum dc_link_id *src); void dc_ed_pec_sync_trigger(struct dc_ed *ed); void dc_ed_init(struct dc_ed *ed); -- 2.43.0
