On Sun, Oct 23, 2022 at 06:07:47PM +0200, Ondrej Jirman wrote:
> lcdsel_grf_reg is defined as u32, so "< 0" comaprison is always false,
> which breaks VOP selection on eg. RK3399. Compare against 0.
>
Sorry about that. I can confirm this works for me on the rk3566 (specifically
the Anbernic RG503).
Tested-by: Chris Morgan <macromorgan@xxxxxxxxxxx>
> Fixes: f3aaa6125b6f ("drm/rockchip: dsi: add rk3568 support")
> Signed-off-by: Ondrej Jirman <megi@xxxxxx>
> ---
> drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c | 4 +---
> 1 file changed, 1 insertion(+), 3 deletions(-)
>
> diff --git a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> index 7d50a4f463d9..2982a4e9a6ed 100644
> --- a/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> +++ b/drivers/gpu/drm/rockchip/dw-mipi-dsi-rockchip.c
> @@ -760,7 +760,7 @@ static void dw_mipi_dsi_rockchip_config(struct dw_mipi_dsi_rockchip *dsi)
> static void dw_mipi_dsi_rockchip_set_lcdsel(struct dw_mipi_dsi_rockchip *dsi,
> int mux)
> {
> - if (dsi->cdata->lcdsel_grf_reg < 0)
> + if (dsi->cdata->lcdsel_grf_reg)
> regmap_write(dsi->grf_regmap, dsi->cdata->lcdsel_grf_reg,
> mux ? dsi->cdata->lcdsel_lit : dsi->cdata->lcdsel_big);
> }
> @@ -1643,7 +1643,6 @@ static const struct rockchip_dw_dsi_chip_data rk3399_chip_data[] = {
> static const struct rockchip_dw_dsi_chip_data rk3568_chip_data[] = {
> {
> .reg = 0xfe060000,
> - .lcdsel_grf_reg = -1,
> .lanecfg1_grf_reg = RK3568_GRF_VO_CON2,
> .lanecfg1 = HIWORD_UPDATE(0, RK3568_DSI0_SKEWCALHS |
> RK3568_DSI0_FORCETXSTOPMODE |
> @@ -1653,7 +1652,6 @@ static const struct rockchip_dw_dsi_chip_data rk3568_chip_data[] = {
> },
> {
> .reg = 0xfe070000,
> - .lcdsel_grf_reg = -1,
> .lanecfg1_grf_reg = RK3568_GRF_VO_CON3,
> .lanecfg1 = HIWORD_UPDATE(0, RK3568_DSI1_SKEWCALHS |
> RK3568_DSI1_FORCETXSTOPMODE |
> --
> 2.38.1
>
