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authorJerome Brunet <jbrunet@baylibre.com>2024-04-26 18:02:54 +0200
committerNeil Armstrong <neil.armstrong@linaro.org>2024-05-03 10:48:54 +0200
commit08001033121dd92b8297a5b7333636b466c30f13 (patch)
tree6335a28246568a07bef37e4eac0c052711c5fe19
parent04703bfd7f99c016a823c74712b97f8b5590ce87 (diff)
drm/meson: dw-hdmi: add bandgap setting for g12
When no mode is set, the utility pin appears to be grounded. No signal is getting through. This is problematic because ARC and eARC use this line and may do so even if no display mode is set. This change enable the bandgap setting on g12 chip, which fix the problem with the utility pin. This is done by restoring init values on PHY init and disable. Fixes: 3b7c1237a72a ("drm/meson: Add G12A support for the DW-HDMI Glue") Signed-off-by: Jerome Brunet <jbrunet@baylibre.com> Reviewed-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://lore.kernel.org/r/20240426160256.3089978-3-jbrunet@baylibre.com Signed-off-by: Neil Armstrong <neil.armstrong@linaro.org> Link: https://patchwork.freedesktop.org/patch/msgid/20240426160256.3089978-3-jbrunet@baylibre.com
-rw-r--r--drivers/gpu/drm/meson/meson_dw_hdmi.c43
1 files changed, 26 insertions, 17 deletions
diff --git a/drivers/gpu/drm/meson/meson_dw_hdmi.c b/drivers/gpu/drm/meson/meson_dw_hdmi.c
index a83d93078537..5565f7777529 100644
--- a/drivers/gpu/drm/meson/meson_dw_hdmi.c
+++ b/drivers/gpu/drm/meson/meson_dw_hdmi.c
@@ -106,6 +106,8 @@
#define HHI_HDMI_CLK_CNTL 0x1cc /* 0x73 */
#define HHI_HDMI_PHY_CNTL0 0x3a0 /* 0xe8 */
#define HHI_HDMI_PHY_CNTL1 0x3a4 /* 0xe9 */
+#define PHY_CNTL1_INIT 0x03900000
+#define PHY_INVERT BIT(17)
#define HHI_HDMI_PHY_CNTL2 0x3a8 /* 0xea */
#define HHI_HDMI_PHY_CNTL3 0x3ac /* 0xeb */
#define HHI_HDMI_PHY_CNTL4 0x3b0 /* 0xec */
@@ -130,6 +132,8 @@ struct meson_dw_hdmi_data {
unsigned int addr);
void (*dwc_write)(struct meson_dw_hdmi *dw_hdmi,
unsigned int addr, unsigned int data);
+ u32 cntl0_init;
+ u32 cntl1_init;
};
struct meson_dw_hdmi {
@@ -458,7 +462,9 @@ static void dw_hdmi_phy_disable(struct dw_hdmi *hdmi,
DRM_DEBUG_DRIVER("\n");
- regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, 0);
+ /* Fallback to init mode */
+ regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL1, dw_hdmi->data->cntl1_init);
+ regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, dw_hdmi->data->cntl0_init);
}
static enum drm_connector_status dw_hdmi_read_hpd(struct dw_hdmi *hdmi,
@@ -576,11 +582,22 @@ static const struct regmap_config meson_dw_hdmi_regmap_config = {
.fast_io = true,
};
-static const struct meson_dw_hdmi_data meson_dw_hdmi_gx_data = {
+static const struct meson_dw_hdmi_data meson_dw_hdmi_gxbb_data = {
.top_read = dw_hdmi_top_read,
.top_write = dw_hdmi_top_write,
.dwc_read = dw_hdmi_dwc_read,
.dwc_write = dw_hdmi_dwc_write,
+ .cntl0_init = 0x0,
+ .cntl1_init = PHY_CNTL1_INIT | PHY_INVERT,
+};
+
+static const struct meson_dw_hdmi_data meson_dw_hdmi_gxl_data = {
+ .top_read = dw_hdmi_top_read,
+ .top_write = dw_hdmi_top_write,
+ .dwc_read = dw_hdmi_dwc_read,
+ .dwc_write = dw_hdmi_dwc_write,
+ .cntl0_init = 0x0,
+ .cntl1_init = PHY_CNTL1_INIT,
};
static const struct meson_dw_hdmi_data meson_dw_hdmi_g12a_data = {
@@ -588,6 +605,8 @@ static const struct meson_dw_hdmi_data meson_dw_hdmi_g12a_data = {
.top_write = dw_hdmi_g12a_top_write,
.dwc_read = dw_hdmi_g12a_dwc_read,
.dwc_write = dw_hdmi_g12a_dwc_write,
+ .cntl0_init = 0x000b4242, /* Bandgap */
+ .cntl1_init = PHY_CNTL1_INIT,
};
static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
@@ -626,18 +645,8 @@ static void meson_dw_hdmi_init(struct meson_dw_hdmi *meson_dw_hdmi)
meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_BIST_CNTL, BIT(12));
/* Setup PHY */
- regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
- 0xffff << 16, 0x0390 << 16);
-
- /* BIT_INVERT */
- if (dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-gxl-dw-hdmi") ||
- dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-gxm-dw-hdmi") ||
- dw_hdmi_is_compatible(meson_dw_hdmi, "amlogic,meson-g12a-dw-hdmi"))
- regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
- BIT(17), 0);
- else
- regmap_update_bits(priv->hhi, HHI_HDMI_PHY_CNTL1,
- BIT(17), BIT(17));
+ regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL1, meson_dw_hdmi->data->cntl1_init);
+ regmap_write(priv->hhi, HHI_HDMI_PHY_CNTL0, meson_dw_hdmi->data->cntl0_init);
/* Enable HDMI-TX Interrupt */
meson_dw_hdmi->data->top_write(meson_dw_hdmi, HDMITX_TOP_INTR_STAT_CLR,
@@ -848,11 +857,11 @@ static const struct dev_pm_ops meson_dw_hdmi_pm_ops = {
static const struct of_device_id meson_dw_hdmi_of_table[] = {
{ .compatible = "amlogic,meson-gxbb-dw-hdmi",
- .data = &meson_dw_hdmi_gx_data },
+ .data = &meson_dw_hdmi_gxbb_data },
{ .compatible = "amlogic,meson-gxl-dw-hdmi",
- .data = &meson_dw_hdmi_gx_data },
+ .data = &meson_dw_hdmi_gxl_data },
{ .compatible = "amlogic,meson-gxm-dw-hdmi",
- .data = &meson_dw_hdmi_gx_data },
+ .data = &meson_dw_hdmi_gxl_data },
{ .compatible = "amlogic,meson-g12a-dw-hdmi",
.data = &meson_dw_hdmi_g12a_data },
{ }