On Wed, Jul 02, 2025 at 10:40:34PM +0300, Ville Syrjälä wrote:
On Wed, Jul 02, 2025 at 02:16:18PM +0530, Ankit Nautiyal wrote:
Introduce a generic helper to check display workarounds using an enum.
Convert Wa_16023588340 to use the new interface, simplifying WA checks
and making future additions easier.
v2: Use drm_WARN instead of MISSING_CASE and simplify intel_display_wa
macro. (Jani)
Suggested-by: Jani Nikula <jani.nik...@intel.com>
Signed-off-by: Ankit Nautiyal <ankit.k.nauti...@intel.com>
---
drivers/gpu/drm/i915/display/intel_display_wa.c | 15 +++++++++++++++
drivers/gpu/drm/i915/display/intel_display_wa.h | 9 +++++++++
drivers/gpu/drm/i915/display/intel_fbc.c | 2 +-
3 files changed, 25 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.c
b/drivers/gpu/drm/i915/display/intel_display_wa.c
index f57280e9d041..f5e8d58d9a68 100644
--- a/drivers/gpu/drm/i915/display/intel_display_wa.c
+++ b/drivers/gpu/drm/i915/display/intel_display_wa.c
@@ -3,6 +3,8 @@
* Copyright © 2023 Intel Corporation
*/
+#include "drm/drm_print.h"
+
#include "i915_reg.h"
#include "intel_de.h"
#include "intel_display_core.h"
@@ -39,3 +41,16 @@ void intel_display_wa_apply(struct intel_display *display)
else if (DISPLAY_VER(display) == 11)
gen11_display_wa_apply(display);
}
+
+bool __intel_display_wa(struct intel_display *display, enum intel_display_wa
wa)
+{
+ switch (wa) {
+ case INTEL_DISPLAY_WA_16023588340:
+ return intel_display_needs_wa_16023588340(display);
+ default:
+ drm_WARN(display->drm, 1, "Missing Wa number: %d\n", wa);
+ break;
+ }
+
+ return false;
+}
diff --git a/drivers/gpu/drm/i915/display/intel_display_wa.h
b/drivers/gpu/drm/i915/display/intel_display_wa.h
index babd9d16603d..146ee70d66f7 100644
--- a/drivers/gpu/drm/i915/display/intel_display_wa.h
+++ b/drivers/gpu/drm/i915/display/intel_display_wa.h
@@ -21,4 +21,13 @@ static inline bool intel_display_needs_wa_16023588340(struct
intel_display *disp
bool intel_display_needs_wa_16023588340(struct intel_display *display);
#endif
+enum intel_display_wa {
+ INTEL_DISPLAY_WA_16023588340,
How is anyone supposed to keep track of these random numbers
and what they mean?
they mean there's a h/w workaround that requires that and this is the id
if you need to find more details about it or what platforms/IPs use
that.
The only time I want to see these numbers is if I really have to
open the spec/hsd for it to double check some details. Othwerwise
it just seems like pointless noise that makes it harder to follow
the code/figure out what the heck is going on.
what is the alternative? The current status quo checking by platform
and/or IP version, dissociated from the WA numbers?
Lucas De Marchi
+};
+
+bool __intel_display_wa(struct intel_display *display, enum intel_display_wa
wa);
+
+#define intel_display_wa(__display, __wa) \
+ __intel_display_wa((__display), INTEL_DISPLAY_WA_##__wa)
+
#endif
diff --git a/drivers/gpu/drm/i915/display/intel_fbc.c
b/drivers/gpu/drm/i915/display/intel_fbc.c
index 6e26cb4c5724..e2e03af520b2 100644
--- a/drivers/gpu/drm/i915/display/intel_fbc.c
+++ b/drivers/gpu/drm/i915/display/intel_fbc.c
@@ -1464,7 +1464,7 @@ static int intel_fbc_check_plane(struct
intel_atomic_state *state,
return 0;
}
- if (intel_display_needs_wa_16023588340(display)) {
+ if (intel_display_wa(display, 16023588340)) {
plane_state->no_fbc_reason = "Wa_16023588340";
This here for instance is completely useless. I have no idea what that
w/a is about or why it requires FBC to be disabled. And if I jump into
intel_display_needs_wa_16023588340() I am none the wiser.
return 0;
}
--
2.45.2
--
Ville Syrjälä
Intel
