drm/i915: Detect eDRAM with the enabled bit only

At the moment we compare the whole EDRAM_PRESENT/EDRAMCAP register value
to 1 while EDRAM_PRESENT is only bit 0 (the rest may be used to describe
eDRAM capabilities).

To be more future proof, only look at bit 0 to detect eDRAM presence.

Signed-off-by: Damien Lespiau <damien.lespiau@intel.com>
Reviewed-by: Paulo Zanoni <paulo.r.zanoni@intel.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>

1 files changed, 1 insertions, 0 deletions

diff --git a/drivers/gpu/drm/i915/i915_reg.h b/drivers/gpu/drm/i915/i915_reg.h
index f13e4e4f29e2..5de6cf450e1a 100644
--- a/drivers/gpu/drm/i915/i915_reg.h
+++ b/drivers/gpu/drm/i915/i915_reg.h
@@ -5994,6 +5994,7 @@ enum skl_disp_power_wells {
 #define  HSW_IDICR                              0x9008
 #define    IDIHASHMSK(x)                        (((x) & 0x3f) << 16)
 #define  HSW_EDRAM_PRESENT                      0x120010
+#define    EDRAM_ENABLED                        0x1
 
 #define GEN6_UCGCTL1                            0x9400
 # define GEN6_EU_TCUNIT_CLOCK_GATE_DISABLE              (1 << 16)