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drm/i915/display: add module parameter to enable DMC wakelock

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This feature should be disabled by default until properly tested and
mature.  Add a module parameter to enable the feature for testing,
while keeping it disabled by default for now.

Reviewed-by: Uma Shankar <uma.shankar@intel.com>
Signed-off-by: Luca Coelho <luciano.coelho@intel.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20240412094148.808179-4-luciano.coelho@intel.com
Signed-off-by: Jani Nikula <jani.nikula@intel.com>
This commit is contained in:
Luca Coelho 2024-04-12 12:41:47 +03:00 committed by Jani Nikula
parent fe3b3ed7ff
commit 8a8dcb23b6
3 changed files with 10 additions and 2 deletions
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5
drivers/gpu/drm/i915/display/intel_display_params.c
View File

@ -116,6 +116,11 @@ intel_display_param_named_unsafe(enable_psr2_sel_fetch, bool, 0400,
"(0=disabled, 1=enabled) "
"Default: 1");
intel_display_param_named_unsafe(enable_dmc_wl, bool, 0400,
"Enable DMC wakelock "
"(0=disabled, 1=enabled) "
"Default: 0");
__maybe_unused
static void _param_print_bool(struct drm_printer *p, const char *driver_name,
const char *name, bool val)

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

@ -46,6 +46,7 @@ struct drm_i915_private;
param(int, enable_psr, -1, 0600) \
param(bool, psr_safest_params, false, 0400) \
param(bool, enable_psr2_sel_fetch, true, 0400) \
param(bool, enable_dmc_wl, false, 0400) \
#define MEMBER(T, member, ...) T member;
struct intel_display_params {

6
drivers/gpu/drm/i915/display/intel_dmc_wl.c
View File

@ -109,7 +109,8 @@ static bool intel_dmc_wl_check_range(u32 address)
static bool __intel_dmc_wl_supported(struct drm_i915_private *i915)
{
if (DISPLAY_VER(i915) < 20 ||
!intel_dmc_has_payload(i915))
!intel_dmc_has_payload(i915) ||
!i915->display.params.enable_dmc_wl)
return false;
return true;
@ -120,7 +121,8 @@ void intel_dmc_wl_init(struct drm_i915_private *i915)
struct intel_dmc_wl *wl = &i915->display.wl;
/* don't call __intel_dmc_wl_supported(), DMC is not loaded yet */
if (DISPLAY_VER(i915) < 20)
if (DISPLAY_VER(i915) < 20 ||
!i915->display.params.enable_dmc_wl)
return;
INIT_DELAYED_WORK(&wl->work, intel_dmc_wl_work);