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drm/xe/fbdev: Limit the usage of stolen for LNL+
As per recommendation in the workarounds: WA_22019338487 There is an issue with accessing Stolen memory pages due a hardware limitation. Limit the usage of stolen memory for fbdev for LNL+. Don't use BIOS FB from stolen on LNL+ and assign the same from system memory. v2: Corrected the WA Number, limited WA to LNL and Adopted XE_WA framework as suggested by Lucas and Matt. v3: Introduced the waxxx_display to implement display side of WA changes on Lunarlake. Used xe_root_mmio_gt and avoid the for loop (Suggested by Lucas) v4: Fixed some nits (Luca) Reviewed-by: Lucas De Marchi <lucas.demarchi@intel.com> Signed-off-by: Uma Shankar <uma.shankar@intel.com> Link: https://patchwork.freedesktop.org/patch/msgid/20240717082252.3875909-1-uma.shankar@intel.com
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@ -10,6 +10,9 @@
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#include "xe_bo.h"
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#include "xe_gt.h"
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#include "xe_ttm_stolen_mgr.h"
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#include "xe_wa.h"
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#include <generated/xe_wa_oob.h>
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struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
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struct drm_fb_helper_surface_size *sizes)
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@ -37,7 +40,7 @@ struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
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size = PAGE_ALIGN(size);
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obj = ERR_PTR(-ENODEV);
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if (!IS_DGFX(xe)) {
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if (!IS_DGFX(xe) && !XE_WA(xe_root_mmio_gt(xe), 22019338487_display)) {
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obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe),
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NULL, size,
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ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
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@ -48,6 +51,7 @@ struct intel_framebuffer *intel_fbdev_fb_alloc(struct drm_fb_helper *helper,
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else
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drm_info(&xe->drm, "Allocated fbdev into stolen failed: %li\n", PTR_ERR(obj));
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}
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if (IS_ERR(obj)) {
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obj = xe_bo_create_pin_map(xe, xe_device_get_root_tile(xe), NULL, size,
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ttm_bo_type_kernel, XE_BO_FLAG_SCANOUT |
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@ -18,6 +18,9 @@
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#include "intel_frontbuffer.h"
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#include "intel_plane_initial.h"
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#include "xe_bo.h"
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#include "xe_wa.h"
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#include <generated/xe_wa_oob.h>
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static bool
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intel_reuse_initial_plane_obj(struct intel_crtc *this,
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@ -104,6 +107,9 @@ initial_plane_bo(struct xe_device *xe,
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phys_base = base;
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flags |= XE_BO_FLAG_STOLEN;
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if (XE_WA(xe_root_mmio_gt(xe), 22019338487_display))
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return NULL;
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/*
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* If the FB is too big, just don't use it since fbdev is not very
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* important and we should probably use that space with FBC or other
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@ -29,4 +29,5 @@
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13011645652 GRAPHICS_VERSION(2004)
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22019338487 MEDIA_VERSION(2000)
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GRAPHICS_VERSION(2001)
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22019338487_display PLATFORM(LUNARLAKE)
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16023588340 GRAPHICS_VERSION(2001)
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