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drm/i915/display: add step name in display runtime info

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Initialize the stepping name in display runtime info. This avoids having
to use intel_step_name().

For display device info print at boot, debugfs and snapshot this changes
the unknown step name from ** to N/A, which is more user friendly
anyway.

Reviewed-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://patch.msgid.link/aab445dedb8235d9fdddfe2ee5bb624cdf453a18.1773663208.git.jani.nikula@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Jani Nikula
2026-03-16 14:14:59 +02:00
parent 902d174c6f
commit 2ca0e7657f
2 changed files with 26 additions and 3 deletions
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28
drivers/gpu/drm/i915/display/intel_display_device.c
View File

@@ -1653,6 +1653,28 @@ static void display_platforms_or(struct intel_display_platforms *dst,
bitmap_or(dst->bitmap, dst->bitmap, src->bitmap, display_platforms_num_bits());
}
#define __STEP_NAME(name) [STEP_##name] = #name,
static void initialize_step(struct intel_display *display, enum intel_step step)
{
static const char step_names[][3] = {
STEP_NAME_LIST(__STEP_NAME)
};
DISPLAY_RUNTIME_INFO(display)->step = step;
/* Step name will remain an empty string if not applicable */
if (step >= 0 && step < ARRAY_SIZE(step_names))
strscpy(DISPLAY_RUNTIME_INFO(display)->step_name, step_names[step]);
}
#undef __STEP_NAME
static const char *step_name(const struct intel_display_runtime_info *runtime)
{
return strlen(runtime->step_name) ? runtime->step_name : "N/A";
}
struct intel_display *intel_display_device_probe(struct pci_dev *pdev,
const struct intel_display_parent_interface *parent)
{
@@ -1730,14 +1752,14 @@ struct intel_display *intel_display_device_probe(struct pci_dev *pdev,
subdesc ? &subdesc->step_info : NULL);
}
DISPLAY_RUNTIME_INFO(display)->step = step;
initialize_step(display, step);
drm_info(display->drm, "Found %s%s%s (device ID %04x) %s display version %u.%02u stepping %s\n",
desc->name, subdesc ? "/" : "", subdesc ? subdesc->name : "",
pdev->device, display->platform.dgfx ? "discrete" : "integrated",
DISPLAY_RUNTIME_INFO(display)->ip.ver,
DISPLAY_RUNTIME_INFO(display)->ip.rel,
step != STEP_NONE ? intel_step_name(step) : "N/A");
step_name(DISPLAY_RUNTIME_INFO(display)));
return display;
@@ -1953,7 +1975,7 @@ void intel_display_device_info_print(const struct intel_display_device_info *inf
drm_printf(p, "display version: %u\n",
runtime->ip.ver);
drm_printf(p, "display stepping: %s\n", intel_step_name(runtime->step));
drm_printf(p, "display stepping: %s\n", step_name(runtime));
#define PRINT_FLAG(name) drm_printf(p, "%s: %s\n", #name, str_yes_no(info->name))
DEV_INFO_DISPLAY_FOR_EACH_FLAG(PRINT_FLAG);

1
drivers/gpu/drm/i915/display/intel_display_device.h
View File

@@ -287,6 +287,7 @@ struct intel_display_runtime_info {
u16 step; /* hardware */
} ip;
int step; /* symbolic */
char step_name[3]; /* empty string if not applicable */
u32 rawclk_freq;