[Intel-gfx] [RFC PATCH 3/5] drm/i915/display: Use panel index to parse lfp backlight

[Animesh Manna]

There will be separate entry of backlight info for each
LFP in VBT. Panel index is used for deriving backlight info
of the respective panel.

Signed-off-by: Animesh Manna <animesh.ma...@intel.com>
---
 drivers/gpu/drm/i915/display/intel_bios.c | 21 +++++++++------------
 1 file changed, 9 insertions(+), 12 deletions(-)

diff --git a/drivers/gpu/drm/i915/display/intel_bios.c 
b/drivers/gpu/drm/i915/display/intel_bios.c
index 943c5584f242..34160dc6b092 100644
--- a/drivers/gpu/drm/i915/display/intel_bios.c
+++ b/drivers/gpu/drm/i915/display/intel_bios.c
@@ -957,11 +957,11 @@ parse_generic_dtd(struct drm_i915_private *i915,
 
 static void
 parse_lfp_backlight(struct drm_i915_private *i915,
-                   struct intel_panel *panel)
+                   struct intel_panel *panel,
+                   int panel_index)
 {
        const struct bdb_lfp_backlight_data *backlight_data;
        const struct lfp_backlight_data_entry *entry;
-       int panel_type = panel->vbt.panel_type;
        u16 level;
 
        backlight_data = find_section(i915, BDB_LVDS_BACKLIGHT);
@@ -975,7 +975,7 @@ parse_lfp_backlight(struct drm_i915_private *i915,
                return;
        }
 
-       entry = &backlight_data->data[panel_type];
+       entry = &backlight_data->data[panel_index];
 
        panel->vbt.backlight.present = entry->type == BDB_BACKLIGHT_TYPE_PWM;
        if (!panel->vbt.backlight.present) {
@@ -999,7 +999,7 @@ parse_lfp_backlight(struct drm_i915_private *i915,
                if (get_blocksize(backlight_data) >= exp_size) {
                        const struct lfp_backlight_control_method *method;
 
-                       method = &backlight_data->backlight_control[panel_type];
+                       method = 
&backlight_data->backlight_control[panel_index];
                        panel->vbt.backlight.type = method->type;
                        panel->vbt.backlight.controller = method->controller;
                }
@@ -1012,11 +1012,11 @@ parse_lfp_backlight(struct drm_i915_private *i915,
                u16 min_level;
                bool scale;
 
-               level = backlight_data->brightness_level[panel_type].level;
-               min_level = 
backlight_data->brightness_min_level[panel_type].level;
+               level = backlight_data->brightness_level[panel_index].level;
+               min_level = 
backlight_data->brightness_min_level[panel_index].level;
 
                if (i915->vbt.version >= 236)
-                       scale = 
backlight_data->brightness_precision_bits[panel_type] == 16;
+                       scale = 
backlight_data->brightness_precision_bits[panel_index] == 16;
                else
                        scale = level > 255;
 
@@ -1028,11 +1028,8 @@ parse_lfp_backlight(struct drm_i915_private *i915,
                        level = 255;
                }
                panel->vbt.backlight.min_brightness = min_level;
-
-               panel->vbt.backlight.brightness_precision_bits =
-                       backlight_data->brightness_precision_bits[panel_type];
        } else {
-               level = backlight_data->level[panel_type];
+               level = backlight_data->level[panel_index];
                panel->vbt.backlight.min_brightness = entry->min_brightness;
        }
 
@@ -3117,7 +3114,7 @@ void intel_bios_init_panel(struct drm_i915_private *i915,
        parse_panel_options(i915, panel, edid, panel_index);
        parse_generic_dtd(i915, panel, panel_index);
        parse_lfp_data(i915, panel, panel_index);
-       parse_lfp_backlight(i915, panel);
+       parse_lfp_backlight(i915, panel, panel_index);
        parse_sdvo_panel_data(i915, panel);
        parse_panel_driver_features(i915, panel);
        parse_power_conservation_features(i915, panel);
-- 
2.29.0