[Intel-gfx] [PATCH v22 02/13] drm/i915: Eliminate magic numbers "0" and "1" from color plane
Stanislav Lisovskiy
stanislav.lisovskiy at intel.com
Thu Apr 9 15:47:19 UTC 2020
According to many computer science sources - magic values
in code _are_ _bad_. For many reasons: the reason is that "0"
or "1" or whatever magic values confuses and doesn't give any
info why this parameter is this value and what it's meaning
is.
I renamed "0" to COLOR_PLANE_Y and "1" to COLOR_PLANE_UV,
because we in fact already use this naming in many other places
and function names, when dealing with color planes.
v2: Removed long line to make checkpatch happy.
Signed-off-by: Stanislav Lisovskiy <stanislav.lisovskiy at intel.com>
---
.../drm/i915/display/intel_display_types.h | 5 +++
drivers/gpu/drm/i915/intel_pm.c | 42 ++++++++++---------
2 files changed, 27 insertions(+), 20 deletions(-)
diff --git a/drivers/gpu/drm/i915/display/intel_display_types.h b/drivers/gpu/drm/i915/display/intel_display_types.h
index ba8c08145c88..b437182c630a 100644
--- a/drivers/gpu/drm/i915/display/intel_display_types.h
+++ b/drivers/gpu/drm/i915/display/intel_display_types.h
@@ -691,6 +691,11 @@ struct skl_plane_wm {
bool is_planar;
};
+enum color_plane {
+ COLOR_PLANE_Y,
+ COLOR_PLANE_UV
+};
+
struct skl_pipe_wm {
struct skl_plane_wm planes[I915_MAX_PLANES];
};
diff --git a/drivers/gpu/drm/i915/intel_pm.c b/drivers/gpu/drm/i915/intel_pm.c
index b632b6bb9c3e..176a28d71822 100644
--- a/drivers/gpu/drm/i915/intel_pm.c
+++ b/drivers/gpu/drm/i915/intel_pm.c
@@ -4013,7 +4013,7 @@ static int skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
int width, const struct drm_format_info *format,
u64 modifier, unsigned int rotation,
u32 plane_pixel_rate, struct skl_wm_params *wp,
- int color_plane);
+ enum color_plane);
static void skl_compute_plane_wm(const struct intel_crtc_state *crtc_state,
int level,
unsigned int latency,
@@ -4035,7 +4035,7 @@ skl_cursor_allocation(const struct intel_crtc_state *crtc_state,
drm_format_info(DRM_FORMAT_ARGB8888),
DRM_FORMAT_MOD_LINEAR,
DRM_MODE_ROTATE_0,
- crtc_state->pixel_rate, &wp, 0);
+ crtc_state->pixel_rate, &wp, COLOR_PLANE_Y);
drm_WARN_ON(&dev_priv->drm, ret);
for (level = 0; level <= max_level; level++) {
@@ -4431,7 +4431,7 @@ static u8 skl_compute_dbuf_slices(const struct intel_crtc_state *crtc_state,
static u64
skl_plane_relative_data_rate(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
- int color_plane)
+ enum color_plane color_plane)
{
struct intel_plane *plane = to_intel_plane(plane_state->uapi.plane);
const struct drm_framebuffer *fb = plane_state->hw.fb;
@@ -4446,7 +4446,7 @@ skl_plane_relative_data_rate(const struct intel_crtc_state *crtc_state,
if (plane->id == PLANE_CURSOR)
return 0;
- if (color_plane == 1 &&
+ if (color_plane == COLOR_PLANE_UV &&
!intel_format_info_is_yuv_semiplanar(fb->format, fb->modifier))
return 0;
@@ -4459,7 +4459,7 @@ skl_plane_relative_data_rate(const struct intel_crtc_state *crtc_state,
height = drm_rect_height(&plane_state->uapi.src) >> 16;
/* UV plane does 1/2 pixel sub-sampling */
- if (color_plane == 1) {
+ if (color_plane == COLOR_PLANE_UV) {
width /= 2;
height /= 2;
}
@@ -4489,12 +4489,12 @@ skl_get_total_relative_data_rate(struct intel_crtc_state *crtc_state,
u64 rate;
/* packed/y */
- rate = skl_plane_relative_data_rate(crtc_state, plane_state, 0);
+ rate = skl_plane_relative_data_rate(crtc_state, plane_state, COLOR_PLANE_Y);
plane_data_rate[plane_id] = rate;
total_data_rate += rate;
/* uv-plane */
- rate = skl_plane_relative_data_rate(crtc_state, plane_state, 1);
+ rate = skl_plane_relative_data_rate(crtc_state, plane_state, COLOR_PLANE_UV);
uv_plane_data_rate[plane_id] = rate;
total_data_rate += rate;
}
@@ -4516,7 +4516,7 @@ icl_get_total_relative_data_rate(struct intel_crtc_state *crtc_state,
u64 rate;
if (!plane_state->planar_linked_plane) {
- rate = skl_plane_relative_data_rate(crtc_state, plane_state, 0);
+ rate = skl_plane_relative_data_rate(crtc_state, plane_state, COLOR_PLANE_Y);
plane_data_rate[plane_id] = rate;
total_data_rate += rate;
} else {
@@ -4533,12 +4533,14 @@ icl_get_total_relative_data_rate(struct intel_crtc_state *crtc_state,
continue;
/* Y plane rate is calculated on the slave */
- rate = skl_plane_relative_data_rate(crtc_state, plane_state, 0);
+ rate = skl_plane_relative_data_rate(crtc_state, plane_state,
+ COLOR_PLANE_Y);
y_plane_id = plane_state->planar_linked_plane->id;
plane_data_rate[y_plane_id] = rate;
total_data_rate += rate;
- rate = skl_plane_relative_data_rate(crtc_state, plane_state, 1);
+ rate = skl_plane_relative_data_rate(crtc_state, plane_state,
+ COLOR_PLANE_UV);
plane_data_rate[plane_id] = rate;
total_data_rate += rate;
}
@@ -4854,14 +4856,14 @@ skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
int width, const struct drm_format_info *format,
u64 modifier, unsigned int rotation,
u32 plane_pixel_rate, struct skl_wm_params *wp,
- int color_plane)
+ enum color_plane color_plane)
{
struct intel_crtc *crtc = to_intel_crtc(crtc_state->uapi.crtc);
struct drm_i915_private *dev_priv = to_i915(crtc->base.dev);
u32 interm_pbpl;
/* only planar format has two planes */
- if (color_plane == 1 &&
+ if (color_plane == COLOR_PLANE_UV &&
!intel_format_info_is_yuv_semiplanar(format, modifier)) {
drm_dbg_kms(&dev_priv->drm,
"Non planar format have single plane\n");
@@ -4878,7 +4880,7 @@ skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
wp->is_planar = intel_format_info_is_yuv_semiplanar(format, modifier);
wp->width = width;
- if (color_plane == 1 && wp->is_planar)
+ if (color_plane == COLOR_PLANE_UV && wp->is_planar)
wp->width /= 2;
wp->cpp = format->cpp[color_plane];
@@ -4945,7 +4947,7 @@ skl_compute_wm_params(const struct intel_crtc_state *crtc_state,
static int
skl_compute_plane_wm_params(const struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
- struct skl_wm_params *wp, int color_plane)
+ struct skl_wm_params *wp, enum color_plane color_plane)
{
const struct drm_framebuffer *fb = plane_state->hw.fb;
int width;
@@ -5187,7 +5189,7 @@ static void skl_compute_transition_wm(const struct intel_crtc_state *crtc_state,
static int skl_build_plane_wm_single(struct intel_crtc_state *crtc_state,
const struct intel_plane_state *plane_state,
- enum plane_id plane_id, int color_plane)
+ enum plane_id plane_id, enum color_plane color_plane)
{
struct skl_plane_wm *wm = &crtc_state->wm.skl.optimal.planes[plane_id];
struct skl_wm_params wm_params;
@@ -5216,7 +5218,7 @@ static int skl_build_plane_wm_uv(struct intel_crtc_state *crtc_state,
/* uv plane watermarks must also be validated for NV12/Planar */
ret = skl_compute_plane_wm_params(crtc_state, plane_state,
- &wm_params, 1);
+ &wm_params, COLOR_PLANE_UV);
if (ret)
return ret;
@@ -5237,7 +5239,7 @@ static int skl_build_plane_wm(struct intel_crtc_state *crtc_state,
return 0;
ret = skl_build_plane_wm_single(crtc_state, plane_state,
- plane_id, 0);
+ plane_id, COLOR_PLANE_Y);
if (ret)
return ret;
@@ -5270,17 +5272,17 @@ static int icl_build_plane_wm(struct intel_crtc_state *crtc_state,
fb->format->num_planes == 1);
ret = skl_build_plane_wm_single(crtc_state, plane_state,
- y_plane_id, 0);
+ y_plane_id, COLOR_PLANE_Y);
if (ret)
return ret;
ret = skl_build_plane_wm_single(crtc_state, plane_state,
- plane_id, 1);
+ plane_id, COLOR_PLANE_UV);
if (ret)
return ret;
} else if (intel_wm_plane_visible(crtc_state, plane_state)) {
ret = skl_build_plane_wm_single(crtc_state, plane_state,
- plane_id, 0);
+ plane_id, COLOR_PLANE_Y);
if (ret)
return ret;
}
--
2.24.1.485.gad05a3d8e5
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