Commit 4cb12b71 authored by Himal Prasad Ghimiray's avatar Himal Prasad Ghimiray Committed by Rodrigo Vivi
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drm/xe/xe2: Determine bios enablement for flat ccs on igfx 



If bios disables flat ccs on igfx make has_flat_ccs as 0 and notify
via drm_dbg.

Bspec:59255

v2:
 - Release forcewake.
 - Add registers in order.
 - drop dgfx condition and only add it back in the future
when the support for an Xe2 dgpu will be added.
- Use drm_dbg instead of drm_info. (Matt)

v3:
 - Address nit(Matt)

Cc: Matt Roper <matthew.d.roper@intel.com>
Cc: Thomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: default avatarHimal Prasad Ghimiray <himal.prasad.ghimiray@intel.com>
Reviewed-by: default avatarMatt Roper <matthew.d.roper@intel.com>
Acked-by: default avatarThomas Hellström <thomas.hellstrom@linux.intel.com>
Signed-off-by: default avatarRodrigo Vivi <rodrigo.vivi@intel.com>
parent 7a18d36f

drivers/gpu/drm/xe/regs/xe_gt_regs.h

+3 −0
Original line number Diff line number Diff line
@@ -162,6 +162,9 @@ 
#define XEHP_SQCM				XE_REG_MCR(0x8724)

#define   EN_32B_ACCESS				REG_BIT(30)



#define XE2_FLAT_CCS_BASE_RANGE_LOWER		XE_REG_MCR(0x8800)

#define   XE2_FLAT_CCS_ENABLE			REG_BIT(0)



#define GSCPSMI_BASE				XE_REG(0x880c)



#define	MIRROR_FUSE3				XE_REG(0x9118)

drivers/gpu/drm/xe/xe_device.c

+30 −0
Original line number Diff line number Diff line
@@ -15,6 +15,7 @@ 
#include <drm/drm_print.h>

#include <drm/xe_drm.h>



#include "regs/xe_gt_regs.h"

#include "regs/xe_regs.h"

#include "xe_bo.h"

#include "xe_debugfs.h"
@@ -26,6 +27,7 @@ 
#include "xe_exec.h"

#include "xe_ggtt.h"

#include "xe_gt.h"

#include "xe_gt_mcr.h"

#include "xe_irq.h"

#include "xe_mmio.h"

#include "xe_module.h"
@@ -401,6 +403,30 @@ int xe_device_probe_early(struct xe_device *xe) 
	return 0;

}



static int xe_device_set_has_flat_ccs(struct  xe_device *xe)

{

	u32 reg;

	int err;



	if (GRAPHICS_VER(xe) < 20 || !xe->info.has_flat_ccs)

		return 0;



	struct xe_gt *gt = xe_root_mmio_gt(xe);



	err = xe_force_wake_get(gt_to_fw(gt), XE_FW_GT);

	if (err)

		return err;



	reg = xe_gt_mcr_unicast_read_any(gt, XE2_FLAT_CCS_BASE_RANGE_LOWER);

	xe->info.has_flat_ccs = (reg & XE2_FLAT_CCS_ENABLE);



	if (!xe->info.has_flat_ccs)

		drm_dbg(&xe->drm,

			"Flat CCS has been disabled in bios, May lead to performance impact");



	return xe_force_wake_put(gt_to_fw(gt), XE_FW_GT);

}



int xe_device_probe(struct xe_device *xe)

{

	struct xe_tile *tile;
@@ -456,6 +482,10 @@ int xe_device_probe(struct xe_device *xe) 
			goto err_irq_shutdown;

	}



	err = xe_device_set_has_flat_ccs(xe);

	if (err)

		return err;



	err = xe_mmio_probe_vram(xe);

	if (err)

		goto err_irq_shutdown;