soc/intel/common/block: Add Intel VGA early graphics support
This patch introduces an early graphics driver which can be used in romstage in cache-as-ram mode. The implementation relies on `libgfxinit' and provide VGA text mode support. SoCs wanting to take advantage of this driver must implement the `early_graphics_soc_panel_init' function to set the panel power sequence timing parameters. BUG=b:252792591 BRANCH=firmware-brya-14505.B TEST=Graphics bring up observed on skolas with extra patches Change-Id: Ie4ad1215e5fadd0adc1271b6bd6ddb0ea258cb5b Signed-off-by: Jeremy Compostella <jeremy.compostella@intel.com> Reviewed-on: https://review.coreboot.org/c/coreboot/+/70299 Reviewed-by: Tarun Tuli <taruntuli@google.com> Reviewed-by: Subrata Banik <subratabanik@google.com> Reviewed-by: Maulik Vaghela <maulikvaghela@google.com> Reviewed-by: Kapil Porwal <kapilporwal@google.com> Tested-by: build bot (Jenkins) <no-reply@coreboot.org>
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@ -11,6 +11,9 @@ is
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procedure gfxinit (lightup_ok : out Interfaces.C.int);
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pragma Export (C, gfxinit, "gma_gfxinit");
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procedure gfxstop (stop_ok : out Interfaces.C.int);
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pragma Export (C, gfxstop, "gma_gfxstop");
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----------------------------------------------------------------------------
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function c_fb_add_framebuffer_info
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@ -97,4 +97,17 @@ is
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end if;
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end gfxinit;
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procedure gfxstop (stop_ok : out Interfaces.C.int)
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is
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success : boolean;
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begin
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HW.GFX.GMA.Initialize (Clean_State => True,
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Success => success);
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if success then
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stop_ok := 1;
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else
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stop_ok := 0;
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end if;
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end gfxstop;
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end GMA.GFX_Init;
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@ -17,6 +17,7 @@ enum {
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};
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void gma_gfxinit(int *lightup_ok);
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void gma_gfxstop(int *stop_ok);
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int gma_read_edid(unsigned char edid[], int port);
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#endif
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@ -56,4 +56,17 @@ is
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end if;
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end gfxinit;
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procedure gfxstop (stop_ok : out Interfaces.C.int)
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is
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success : boolean;
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begin
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HW.GFX.GMA.Initialize (Clean_State => True,
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Success => success);
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if success then
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stop_ok := 1;
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else
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stop_ok := 0;
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end if;
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end gfxstop;
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end GMA.GFX_Init;
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@ -1,5 +1,6 @@
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config SOC_INTEL_COMMON_BLOCK_GRAPHICS
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bool
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select ROMSTAGE_VGA if MAINBOARD_USE_EARLY_LIBGFXINIT
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help
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Intel Processor common Graphics support
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@ -1,2 +1,3 @@
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## SPDX-License-Identifier: GPL-2.0-only
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romstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_GRAPHICS) += early_graphics.c
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ramstage-$(CONFIG_SOC_INTEL_COMMON_BLOCK_GRAPHICS) += graphics.c
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@ -0,0 +1,52 @@
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/* SPDX-License-Identifier: GPL-2.0-or-later */
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#include <device/pci.h>
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#include <drivers/intel/gma/libgfxinit.h>
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#include <intelblocks/early_graphics.h>
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#include <soc/pci_devs.h>
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static bool initialized;
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static void device_init(void)
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{
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/* Disable response in IO and MMIO space. */
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pci_and_config16(SA_DEV_IGD, PCI_COMMAND,
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~(PCI_COMMAND_IO | PCI_COMMAND_MEMORY));
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/* Program IGD Base Address Register 0. */
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pci_write_config32(SA_DEV_IGD, PCI_BASE_ADDRESS_0,
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CONFIG_GFX_GMA_DEFAULT_MMIO);
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/* Enable response in IO and MMIO space. */
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pci_or_config16(SA_DEV_IGD, PCI_COMMAND,
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(PCI_COMMAND_IO | PCI_COMMAND_MEMORY));
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}
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bool early_graphics_init(void)
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{
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int ret;
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if (!CONFIG(MAINBOARD_USE_EARLY_LIBGFXINIT))
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return false;
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/* Perform minimal graphic MMIO configuration. */
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device_init();
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/* Configure display panel. */
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early_graphics_soc_panel_init();
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gma_gfxinit(&ret);
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initialized = !!ret;
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return initialized;
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}
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void early_graphics_stop(void)
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{
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int ret;
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if (!initialized)
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return;
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gma_gfxstop(&ret);
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}
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@ -0,0 +1,28 @@
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/* SPDX-License-Identifier: GPL-2.0-only */
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#ifndef SOC_INTEL_COMMON_BLOCK_GRAPHICS_EARLY_H
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#define SOC_INTEL_COMMON_BLOCK_GRAPHICS_EARLY_H
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#include <stdbool.h>
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/*
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* SoC override
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*
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* All new SoC must implement below functionality.
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*/
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/* Configure display panel */
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void early_graphics_soc_panel_init(void);
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/*
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* Early graphics module API
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* Graphics at this stage is limited to VGA text mode.
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*/
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/* Initialize graphics. Return true if VGA text mode is ready to use. */
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bool early_graphics_init(void);
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/* Clear graphics configuration, turn off the displays. */
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void early_graphics_stop(void);
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#endif /* SOC_INTEL_COMMON_BLOCK_GRAPHICS_EARLY_H */
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