coreboot/src/soc
Sowmya V 6186399a0f soc/intel/pantherlake: Add CD clock frequency control support
This change adds support for configuring higher CD Clock frequencies
for VGA SOL initialization during the Pre-Memory phase.
This feature allows BIOS to request specific display core clock
frequencies when VGA support is enabled during MRC training.

The VgaInitControl field in IGPU_PEI_PREMEM_CONFIG has been extended
to include BIT6-7 for CD Clock frequency selection:
* 0: No higher CD Clock required
* 1: 442 MHz
* 2: 461 MHz

BUG=b:458353982
TEST=Build and boot fatcat/lapis, verify display initialization.

Change-Id: I82fae0d21bb83ed26aad73b830ed15fcd626a9ae
Signed-off-by: Alok Agarwal <alok.agarwal@intel.com>
Signed-off-by: Sowmya V <v.sowmya@intel.com>
Reviewed-on: https://review.coreboot.org/c/coreboot/+/90795
Reviewed-by: Kapil Porwal <kapilporwal@google.com>
Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
2026-02-19 02:44:50 +00:00
..
amd soc/amd/cezanne/acpi: Move SMN accessor to DSDT 2026-02-17 14:23:06 +00:00
cavium
example/min86
ibm/power9 soc/power9/rom_media.c: find CBFS in PNOR 2025-08-28 20:14:01 +00:00
intel soc/intel/pantherlake: Add CD clock frequency control support 2026-02-19 02:44:50 +00:00
mediatek soc/mediatek/common: Combine dsi_cmdq_size register writes 2026-01-25 19:06:22 +00:00
nvidia treewide: Move mipi_panel_parse_commands() to commonlib 2026-01-14 09:38:36 +00:00
qualcomm soc/qualcomm/x1p42100: Add support to invoke LPASS Init 2026-02-12 17:23:48 +00:00
rockchip treewide: Move mipi_panel_parse_commands() to commonlib 2026-01-14 09:38:36 +00:00
samsung
sifive
ti
ucb/riscv
xilinx