diff options
Diffstat (limited to 'src/soc/intel/common/block/graphics')
| -rw-r--r-- | src/soc/intel/common/block/graphics/Kconfig | 5 | ||||
| -rw-r--r-- | src/soc/intel/common/block/graphics/graphics.c | 8 |
2 files changed, 13 insertions, 0 deletions
diff --git a/src/soc/intel/common/block/graphics/Kconfig b/src/soc/intel/common/block/graphics/Kconfig index 4ab92001c3..e632cb9bb0 100644 --- a/src/soc/intel/common/block/graphics/Kconfig +++ b/src/soc/intel/common/block/graphics/Kconfig @@ -2,3 +2,8 @@ config SOC_INTEL_COMMON_BLOCK_GRAPHICS bool help Intel Processor common Graphics support + +config SOC_INTEL_CONFIGURE_DDI_A_4_LANES + bool + help + Selected by platforms that require DDI-A bifurcation setup. diff --git a/src/soc/intel/common/block/graphics/graphics.c b/src/soc/intel/common/block/graphics/graphics.c index ba4bc85a22..e2c90600ac 100644 --- a/src/soc/intel/common/block/graphics/graphics.c +++ b/src/soc/intel/common/block/graphics/graphics.c @@ -1,5 +1,6 @@ /* SPDX-License-Identifier: GPL-2.0-or-later */ +#include <acpi/acpi.h> #include <assert.h> #include <bootmode.h> #include <console/console.h> @@ -34,6 +35,13 @@ static void gma_init(struct device *const dev) /* SoC specific configuration. */ graphics_soc_init(dev); + if (CONFIG(SOC_INTEL_CONFIGURE_DDI_A_4_LANES) && !acpi_is_wakeup_s3()) { + const u32 ddi_buf_ctl = graphics_gtt_read(DDI_BUF_CTL_A); + /* Only program if the buffer is not enabled yet. */ + if (!(ddi_buf_ctl & DDI_BUF_CTL_ENABLE)) + graphics_gtt_write(DDI_BUF_CTL_A, ddi_buf_ctl | DDI_A_4_LANES); + } + /* * GFX PEIM module inside FSP binary is taking care of graphics * initialization based on RUN_FSP_GOP Kconfig option and input |