diff options
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_tcon.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_tcon.c | 25 |
1 files changed, 23 insertions, 2 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index fb42e572f7db..e853dfe51389 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -699,6 +699,25 @@ static int sun4i_tcon_bind(struct device *dev, struct device *master, if (ret < 0) goto err_free_clocks; + if (tcon->quirks->needs_de_be_mux) { + /* + * We assume there is no dynamic muxing of backends + * and TCONs, so we select the backend with same ID. + * + * While dynamic selection might be interesting, since + * the CRTC is tied to the TCON, while the layers are + * tied to the backends, this means, we will need to + * switch between groups of layers. There might not be + * a way to represent this constraint in DRM. + */ + regmap_update_bits(tcon->regs, SUN4I_TCON0_CTL_REG, + SUN4I_TCON0_CTL_SRC_SEL_MASK, + tcon->id); + regmap_update_bits(tcon->regs, SUN4I_TCON1_CTL_REG, + SUN4I_TCON1_CTL_SRC_SEL_MASK, + tcon->id); + } + list_add_tail(&tcon->list, &drv->tcon_list); return 0; @@ -754,11 +773,13 @@ static const struct sun4i_tcon_quirks sun5i_a13_quirks = { }; static const struct sun4i_tcon_quirks sun6i_a31_quirks = { - .has_channel_1 = true, + .has_channel_1 = true, + .needs_de_be_mux = true, }; static const struct sun4i_tcon_quirks sun6i_a31s_quirks = { - .has_channel_1 = true, + .has_channel_1 = true, + .needs_de_be_mux = true, }; static const struct sun4i_tcon_quirks sun8i_a33_quirks = { |