drm/komeda: Remove clock ratio property

Properties are uapi like anything else, with all the usual rules
regarding review, testcases, open source userspace ... Furthermore
driver-private kms properties are highly discouraged, over the past
few years we've realized we need to make a serious effort at better
standardizing this stuff.

From the discussion with Liviu the solution for these here needs
multiple pieces:

- For being able to reliably read the memory clock we need a DT
  property, plus maybe DT override snippets to fix it if it's wrong.

- For exposing plane limitations to userspace there's TEST_ONLY. There
  is a bit a gap in telling userspace better that scaling doesn't work
  due to limits (atm a good strategy is to retry again without scaling
  when adding a plane didn't work the first time around). But that
  needs a more generic solution, not exposing something extremely
  komeda specific.

- If this is needed by validation tools, you can still expose it in
  debugfs. We have an entire nice infrastructure for debug printing of
  kms objects already, see the various atomic_print_state callbacks
  and infrastructure around them.

Fixes: 1f7f9ab7900e ("drm/komeda: Add engine clock requirement check for the downscaling")
Cc: Lowry Li (Arm Technology China) <lowry.li@arm.com>
Cc: James Qian Wang (Arm Technology China) <james.qian.wang@arm.com>
Cc: Liviu Dudau <liviu.dudau@arm.com>
Cc: Mali DP Maintainers <malidp@foss.arm.com>
Cc: Brian Starkey <brian.starkey@arm.com>
Signed-off-by: Daniel Vetter <daniel.vetter@ffwll.ch>
Signed-off-by: Daniel Vetter <daniel.vetter@intel.com>
Signed-off-by: Liviu Dudau <Liviu.Dudau@arm.com>
Link: https://patchwork.freedesktop.org/patch/msgid/20190705121006.26085-1-daniel.vetter@ffwll.ch

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
index 3f222f4..e852dc2 100644 (file)
--- a/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_crtc.c
@@ -454,24 +454,6 @@ static void komeda_crtc_vblank_disable(struct drm_crtc *crtc)
        mdev->funcs->on_off_vblank(mdev, kcrtc->master->id, false);
 }
 
-static int
-komeda_crtc_atomic_get_property(struct drm_crtc *crtc,
-                               const struct drm_crtc_state *state,
-                               struct drm_property *property, uint64_t *val)
-{
-       struct komeda_crtc *kcrtc = to_kcrtc(crtc);
-       struct komeda_crtc_state *kcrtc_st = to_kcrtc_st(state);
-
-       if (property == kcrtc->clock_ratio_property) {
-               *val = kcrtc_st->clock_ratio;
-       } else {
-               DRM_DEBUG_DRIVER("Unknown property %s\n", property->name);
-               return -EINVAL;
-       }
-
-       return 0;
-}
-
 static const struct drm_crtc_funcs komeda_crtc_funcs = {
        .gamma_set              = drm_atomic_helper_legacy_gamma_set,
        .destroy                = drm_crtc_cleanup,
@@ -482,7 +464,6 @@ static const struct drm_crtc_funcs komeda_crtc_funcs = {
        .atomic_destroy_state   = komeda_crtc_atomic_destroy_state,
        .enable_vblank          = komeda_crtc_vblank_enable,
        .disable_vblank         = komeda_crtc_vblank_disable,
-       .atomic_get_property    = komeda_crtc_atomic_get_property,
 };
 
 int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms,
@@ -518,22 +499,6 @@ int komeda_kms_setup_crtcs(struct komeda_kms_dev *kms,
        return 0;
 }
 
-static int komeda_crtc_create_clock_ratio_property(struct komeda_crtc *kcrtc)
-{
-       struct drm_crtc *crtc = &kcrtc->base;
-       struct drm_property *prop;
-
-       prop = drm_property_create_range(crtc->dev, DRM_MODE_PROP_ATOMIC,
-                                        "CLOCK_RATIO", 0, U64_MAX);
-       if (!prop)
-               return -ENOMEM;
-
-       drm_object_attach_property(&crtc->base, prop, 0);
-       kcrtc->clock_ratio_property = prop;
-
-       return 0;
-}
-
 static int komeda_crtc_create_slave_planes_property(struct komeda_crtc *kcrtc)
 {
        struct drm_crtc *crtc = &kcrtc->base;
@@ -590,10 +555,6 @@ static int komeda_crtc_add(struct komeda_kms_dev *kms,
 
        crtc->port = kcrtc->master->of_output_port;
 
-       err = komeda_crtc_create_clock_ratio_property(kcrtc);
-       if (err)
-               return err;
-
        err = komeda_crtc_create_slave_planes_property(kcrtc);
        if (err)
                return err;

diff --git a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
index 219fa3f..2775f34 100644 (file)
--- a/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
+++ b/drivers/gpu/drm/arm/display/komeda/komeda_kms.h
@@ -95,9 +95,6 @@ struct komeda_crtc {
        /** @disable_done: this flip_done is for tracing the disable */
        struct completion *disable_done;
 
-       /** @clock_ratio_property: property for ratio of (aclk << 32)/pxlclk */
-       struct drm_property *clock_ratio_property;
-
        /** @slave_planes_property: property for slaves of the planes */
        struct drm_property *slave_planes_property;
 };