diff options
| author | Andrey Lebedev <andrey@lebedev.lt> | 2020-02-19 20:08:58 +0200 |
|---|---|---|
| committer | Maxime Ripard <maxime@cerno.tech> | 2020-02-20 18:25:36 +0100 |
| commit | d718e53a48f7bcfa6cdd0c00d5ed1fb516595446 (patch) | |
| tree | 430a148961f39e387d9104d70326bed243c6144a /drivers/gpu/drm/sun4i/sun4i_tcon.c | |
| parent | cd0ecabdc953397ed0378022b3b90e0c0871c2eb (diff) | |
drm/sun4i: tcon: Support LVDS output on Allwinner A20
A20 SoC (found in Cubieboard 2 among others) requires different LVDS set
up procedure than A33. Timing controller (tcon) driver only implements
sun6i-style procedure, that doesn't work on A20 (sun7i).
Signed-off-by: Andrey Lebedev <andrey@lebedev.lt>
Signed-off-by: Maxime Ripard <maxime@cerno.tech>
Link: https://patchwork.freedesktop.org/patch/msgid/20200219180858.4806-6-andrey.lebedev@gmail.com
Diffstat (limited to 'drivers/gpu/drm/sun4i/sun4i_tcon.c')
| -rw-r--r-- | drivers/gpu/drm/sun4i/sun4i_tcon.c | 36 |
1 files changed, 35 insertions, 1 deletions
diff --git a/drivers/gpu/drm/sun4i/sun4i_tcon.c b/drivers/gpu/drm/sun4i/sun4i_tcon.c index 2d55ca4218c2..df8bd30b67f0 100644 --- a/drivers/gpu/drm/sun4i/sun4i_tcon.c +++ b/drivers/gpu/drm/sun4i/sun4i_tcon.c @@ -114,6 +114,30 @@ static void sun4i_tcon_channel_set_status(struct sun4i_tcon *tcon, int channel, } } +static void sun4i_tcon_setup_lvds_phy(struct sun4i_tcon *tcon, + const struct drm_encoder *encoder) +{ + regmap_write(tcon->regs, SUN4I_TCON0_LVDS_ANA0_REG, + SUN4I_TCON0_LVDS_ANA0_CK_EN | + SUN4I_TCON0_LVDS_ANA0_REG_V | + SUN4I_TCON0_LVDS_ANA0_REG_C | + SUN4I_TCON0_LVDS_ANA0_EN_MB | + SUN4I_TCON0_LVDS_ANA0_PD | + SUN4I_TCON0_LVDS_ANA0_DCHS); + + udelay(2); /* delay at least 1200 ns */ + regmap_update_bits(tcon->regs, SUN4I_TCON0_LVDS_ANA1_REG, + SUN4I_TCON0_LVDS_ANA1_INIT, + SUN4I_TCON0_LVDS_ANA1_INIT); + udelay(1); /* delay at least 120 ns */ + regmap_update_bits(tcon->regs, SUN4I_TCON0_LVDS_ANA1_REG, + SUN4I_TCON0_LVDS_ANA1_UPDATE, + SUN4I_TCON0_LVDS_ANA1_UPDATE); + regmap_update_bits(tcon->regs, SUN4I_TCON0_LVDS_ANA0_REG, + SUN4I_TCON0_LVDS_ANA0_EN_MB, + SUN4I_TCON0_LVDS_ANA0_EN_MB); +} + static void sun6i_tcon_setup_lvds_phy(struct sun4i_tcon *tcon, const struct drm_encoder *encoder) { @@ -1454,6 +1478,16 @@ static const struct sun4i_tcon_quirks sun6i_a31s_quirks = { .dclk_min_div = 1, }; +static const struct sun4i_tcon_quirks sun7i_a20_tcon0_quirks = { + .supports_lvds = true, + .has_channel_0 = true, + .has_channel_1 = true, + .dclk_min_div = 4, + /* Same display pipeline structure as A10 */ + .set_mux = sun4i_a10_tcon_set_mux, + .setup_lvds_phy = sun4i_tcon_setup_lvds_phy, +}; + static const struct sun4i_tcon_quirks sun7i_a20_quirks = { .has_channel_0 = true, .has_channel_1 = true, @@ -1508,7 +1542,7 @@ const struct of_device_id sun4i_tcon_of_table[] = { { .compatible = "allwinner,sun6i-a31-tcon", .data = &sun6i_a31_quirks }, { .compatible = "allwinner,sun6i-a31s-tcon", .data = &sun6i_a31s_quirks }, { .compatible = "allwinner,sun7i-a20-tcon", .data = &sun7i_a20_quirks }, - { .compatible = "allwinner,sun7i-a20-tcon0", .data = &sun7i_a20_quirks }, + { .compatible = "allwinner,sun7i-a20-tcon0", .data = &sun7i_a20_tcon0_quirks }, { .compatible = "allwinner,sun7i-a20-tcon1", .data = &sun7i_a20_quirks }, { .compatible = "allwinner,sun8i-a23-tcon", .data = &sun8i_a33_quirks }, { .compatible = "allwinner,sun8i-a33-tcon", .data = &sun8i_a33_quirks }, |