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drm/i915/dsi: fix dual-link DSI backlight and CABC ports for display 11+

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The VBT dual-link DSI backlight and CABC still use ports A and C, both
in Bspec and code, while display 11+ DSI only supports ports A and
B. Assume port C actually means port B for display 11+ when parsing VBT.

Bspec: 20154
Closes: https://gitlab.freedesktop.org/drm/intel/-/issues/6476
Cc: stable@vger.kernel.org
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
Reviewed-by: Stanislav Lisovskiy <stanislav.lisovskiy@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/8c462718bcc7b36a83e09d0a5eef058b6bc8b1a2.1660664162.git.jani.nikula@intel.com
This commit is contained in:
Jani Nikula
2022-08-16 18:37:21 +03:00
parent f4a6c7a454
commit ab55165d73
1 changed files with 6 additions and 4 deletions
Download Patch File Download Diff File Expand all files Collapse all files

10
drivers/gpu/drm/i915/display/intel_bios.c
View File

@@ -1596,6 +1596,8 @@ static void parse_dsi_backlight_ports(struct drm_i915_private *i915,
struct intel_panel *panel,
enum port port)
{
enum port port_bc = DISPLAY_VER(i915) >= 11 ? PORT_B : PORT_C;
if (!panel->vbt.dsi.config->dual_link || i915->vbt.version < 197) {
panel->vbt.dsi.bl_ports = BIT(port);
if (panel->vbt.dsi.config->cabc_supported)
@@ -1609,11 +1611,11 @@ static void parse_dsi_backlight_ports(struct drm_i915_private *i915,
panel->vbt.dsi.bl_ports = BIT(PORT_A);
break;
case DL_DCS_PORT_C:
panel->vbt.dsi.bl_ports = BIT(PORT_C);
panel->vbt.dsi.bl_ports = BIT(port_bc);
break;
default:
case DL_DCS_PORT_A_AND_C:
panel->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(PORT_C);
panel->vbt.dsi.bl_ports = BIT(PORT_A) | BIT(port_bc);
break;
}
@@ -1625,12 +1627,12 @@ static void parse_dsi_backlight_ports(struct drm_i915_private *i915,
panel->vbt.dsi.cabc_ports = BIT(PORT_A);
break;
case DL_DCS_PORT_C:
panel->vbt.dsi.cabc_ports = BIT(PORT_C);
panel->vbt.dsi.cabc_ports = BIT(port_bc);
break;
default:
case DL_DCS_PORT_A_AND_C:
panel->vbt.dsi.cabc_ports =
BIT(PORT_A) | BIT(PORT_C);
BIT(PORT_A) | BIT(port_bc);
break;
}
}