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drm/mediatek: dp: Add MT8195 External DisplayPort support

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Add External DisplayPort support to the MT8195 eDP driver.

Signed-off-by: Guillaume Ranquet <granquet@baylibre.com>
Signed-off-by: Bo-Chen Chen <rex-bc.chen@mediatek.com>
Reviewed-by: CK Hu <ck.hu@mediatek.com>
Tested-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Reviewed-by: AngeloGioacchino Del Regno <angelogioacchino.delregno@collabora.com>
Signed-off-by: Dmitry Osipenko <dmitry.osipenko@collabora.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20220901044149.16782-9-rex-bc.chen@mediatek.com
This commit is contained in:
Guillaume Ranquet 2022-09-01 12:41:47 +08:00 committed by Dmitry Osipenko
parent 86e77a1f0a
commit d9e6ea02fc
1 changed files with 139 additions and 0 deletions
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139
drivers/gpu/drm/mediatek/mtk_dp.c
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@ -35,6 +35,7 @@
#define MTK_DP_SIP_CONTROL_AARCH32 MTK_SIP_SMC_CMD(0x523)
#define MTK_DP_SIP_ATF_EDP_VIDEO_UNMUTE (BIT(0) | BIT(5))
#define MTK_DP_SIP_ATF_VIDEO_UNMUTE BIT(5)
#define MTK_DP_THREAD_CABLE_STATE_CHG BIT(0)
#define MTK_DP_THREAD_HPD_EVENT BIT(1)
@ -199,6 +200,89 @@ static const struct mtk_dp_efuse_fmt mt8195_edp_efuse_fmt[MTK_DP_CAL_MAX] = {
},
};
static const struct mtk_dp_efuse_fmt mt8195_dp_efuse_fmt[MTK_DP_CAL_MAX] = {
[MTK_DP_CAL_GLB_BIAS_TRIM] = {
.idx = 0,
.shift = 27,
.mask = 0x1f,
.min_val = 1,
.max_val = 0x1e,
.default_val = 0xf,
},
[MTK_DP_CAL_CLKTX_IMPSE] = {
.idx = 0,
.shift = 13,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_0] = {
.idx = 1,
.shift = 28,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_1] = {
.idx = 1,
.shift = 20,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_2] = {
.idx = 1,
.shift = 12,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_PMOS_3] = {
.idx = 1,
.shift = 4,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_0] = {
.idx = 1,
.shift = 24,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_1] = {
.idx = 1,
.shift = 16,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_2] = {
.idx = 1,
.shift = 8,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
[MTK_DP_CAL_LN_TX_IMPSEL_NMOS_3] = {
.idx = 1,
.shift = 0,
.mask = 0xf,
.min_val = 1,
.max_val = 0xe,
.default_val = 0x8,
},
};
static struct regmap_config mtk_dp_regmap_config = {
.reg_bits = 32,
.val_bits = 32,
@ -1479,6 +1563,50 @@ static int mtk_dp_dt_parse(struct mtk_dp *mtk_dp,
return 0;
}
static enum drm_connector_status mtk_dp_bdg_detect(struct drm_bridge *bridge)
{
struct mtk_dp *mtk_dp = mtk_dp_from_bridge(bridge);
enum drm_connector_status ret = connector_status_disconnected;
bool enabled = mtk_dp->enabled;
u8 sink_count = 0;
if (mtk_dp->train_info.cable_plugged_in) {
if (!enabled) {
/* power on aux */
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL_LANE,
DP_PWR_STATE_MASK);
/* power on panel */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D0);
usleep_range(2000, 5000);
}
/*
* Some dongles still source HPD when they do not connect to any
* sink device. To avoid this, we need to read the sink count
* to make sure we do connect to sink devices. After this detect
* function, we just need to check the HPD connection to check
* whether we connect to a sink device.
*/
drm_dp_dpcd_readb(&mtk_dp->aux, DP_SINK_COUNT, &sink_count);
if (DP_GET_SINK_COUNT(sink_count))
ret = connector_status_connected;
if (!enabled) {
/* power off panel */
drm_dp_dpcd_writeb(&mtk_dp->aux, DP_SET_POWER, DP_SET_POWER_D3);
usleep_range(2000, 3000);
/* power off aux */
mtk_dp_update_bits(mtk_dp, MTK_DP_TOP_PWR_STATE,
DP_PWR_STATE_BANDGAP_TPLL,
DP_PWR_STATE_MASK);
}
}
return ret;
}
static struct edid *mtk_dp_get_edid(struct drm_bridge *bridge,
struct drm_connector *connector)
{
@ -1865,6 +1993,7 @@ static const struct drm_bridge_funcs mtk_dp_bridge_funcs = {
.atomic_disable = mtk_dp_bridge_atomic_disable,
.mode_valid = mtk_dp_bridge_mode_valid,
.get_edid = mtk_dp_get_edid,
.detect = mtk_dp_bdg_detect,
};
static int mtk_dp_probe(struct platform_device *pdev)
@ -1991,11 +2120,21 @@ static const struct mtk_dp_data mt8195_edp_data = {
.efuse_fmt = mt8195_edp_efuse_fmt,
};
static const struct mtk_dp_data mt8195_dp_data = {
.bridge_type = DRM_MODE_CONNECTOR_DisplayPort,
.smc_cmd = MTK_DP_SIP_ATF_VIDEO_UNMUTE,
.efuse_fmt = mt8195_dp_efuse_fmt,
};
static const struct of_device_id mtk_dp_of_match[] = {
{
.compatible = "mediatek,mt8195-edp-tx",
.data = &mt8195_edp_data,
},
{
.compatible = "mediatek,mt8195-dp-tx",
.data = &mt8195_dp_data,
},
{},
};
MODULE_DEVICE_TABLE(of, mtk_dp_of_match);