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Subject[PATCH v4 12/14] drm: radeon: remove dead code and pointless local lut storage
Date
The redundant fb helpers .load_lut, .gamma_set and .gamma_get are
no longer used. Remove the dead code and hook up the crtc .gamma_set
to use the crtc gamma_store directly instead of duplicating that
info locally.

Signed-off-by: Peter Rosin <peda@axentia.se>
---
drivers/gpu/drm/radeon/atombios_crtc.c | 1 -
drivers/gpu/drm/radeon/radeon_connectors.c | 7 ++-
drivers/gpu/drm/radeon/radeon_display.c | 71 ++++++++++++-----------------
drivers/gpu/drm/radeon/radeon_fb.c | 2 -
drivers/gpu/drm/radeon/radeon_legacy_crtc.c | 1 -
drivers/gpu/drm/radeon/radeon_mode.h | 4 --
6 files changed, 33 insertions(+), 53 deletions(-)

diff --git a/drivers/gpu/drm/radeon/atombios_crtc.c b/drivers/gpu/drm/radeon/atombios_crtc.c
index 3c492a0..02baaaf 100644
--- a/drivers/gpu/drm/radeon/atombios_crtc.c
+++ b/drivers/gpu/drm/radeon/atombios_crtc.c
@@ -2217,7 +2217,6 @@ static const struct drm_crtc_helper_funcs atombios_helper_funcs = {
.mode_set_base_atomic = atombios_crtc_set_base_atomic,
.prepare = atombios_crtc_prepare,
.commit = atombios_crtc_commit,
- .load_lut = radeon_crtc_load_lut,
.disable = atombios_crtc_disable,
};

diff --git a/drivers/gpu/drm/radeon/radeon_connectors.c b/drivers/gpu/drm/radeon/radeon_connectors.c
index 27affbd..2f642cb 100644
--- a/drivers/gpu/drm/radeon/radeon_connectors.c
+++ b/drivers/gpu/drm/radeon/radeon_connectors.c
@@ -773,12 +773,15 @@ static int radeon_connector_set_property(struct drm_connector *connector, struct

if (connector->encoder->crtc) {
struct drm_crtc *crtc = connector->encoder->crtc;
- const struct drm_crtc_helper_funcs *crtc_funcs = crtc->helper_private;
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);

radeon_crtc->output_csc = radeon_encoder->output_csc;

- (*crtc_funcs->load_lut)(crtc);
+ /*
+ * Our .gamma_set assumes the .gamma_store has been
+ * prefilled and don't care about its arguments.
+ */
+ crtc->funcs->gamma_set(crtc, NULL, NULL, NULL, 0, NULL);
}
}

diff --git a/drivers/gpu/drm/radeon/radeon_display.c b/drivers/gpu/drm/radeon/radeon_display.c
index 17d3daf..8b7d7a0 100644
--- a/drivers/gpu/drm/radeon/radeon_display.c
+++ b/drivers/gpu/drm/radeon/radeon_display.c
@@ -42,6 +42,7 @@ static void avivo_crtc_load_lut(struct drm_crtc *crtc)
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct radeon_device *rdev = dev->dev_private;
+ u16 *r, *g, *b;
int i;

DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);
@@ -60,11 +61,14 @@ static void avivo_crtc_load_lut(struct drm_crtc *crtc)
WREG32(AVIVO_DC_LUT_WRITE_EN_MASK, 0x0000003f);

WREG8(AVIVO_DC_LUT_RW_INDEX, 0);
+ r = crtc->gamma_store;
+ g = r + crtc->gamma_size;
+ b = g + crtc->gamma_size;
for (i = 0; i < 256; i++) {
WREG32(AVIVO_DC_LUT_30_COLOR,
- (radeon_crtc->lut_r[i] << 20) |
- (radeon_crtc->lut_g[i] << 10) |
- (radeon_crtc->lut_b[i] << 0));
+ ((*r++ & 0xffc0) << 14) |
+ ((*g++ & 0xffc0) << 4) |
+ (*b++ >> 6));
}

/* Only change bit 0 of LUT_SEL, other bits are set elsewhere */
@@ -76,6 +80,7 @@ static void dce4_crtc_load_lut(struct drm_crtc *crtc)
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct radeon_device *rdev = dev->dev_private;
+ u16 *r, *g, *b;
int i;

DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);
@@ -93,11 +98,14 @@ static void dce4_crtc_load_lut(struct drm_crtc *crtc)
WREG32(EVERGREEN_DC_LUT_WRITE_EN_MASK + radeon_crtc->crtc_offset, 0x00000007);

WREG32(EVERGREEN_DC_LUT_RW_INDEX + radeon_crtc->crtc_offset, 0);
+ r = crtc->gamma_store;
+ g = r + crtc->gamma_size;
+ b = g + crtc->gamma_size;
for (i = 0; i < 256; i++) {
WREG32(EVERGREEN_DC_LUT_30_COLOR + radeon_crtc->crtc_offset,
- (radeon_crtc->lut_r[i] << 20) |
- (radeon_crtc->lut_g[i] << 10) |
- (radeon_crtc->lut_b[i] << 0));
+ ((*r++ & 0xffc0) << 14) |
+ ((*g++ & 0xffc0) << 4) |
+ (*b++ >> 6));
}
}

@@ -106,6 +114,7 @@ static void dce5_crtc_load_lut(struct drm_crtc *crtc)
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct radeon_device *rdev = dev->dev_private;
+ u16 *r, *g, *b;
int i;

DRM_DEBUG_KMS("%d\n", radeon_crtc->crtc_id);
@@ -135,11 +144,14 @@ static void dce5_crtc_load_lut(struct drm_crtc *crtc)
WREG32(EVERGREEN_DC_LUT_WRITE_EN_MASK + radeon_crtc->crtc_offset, 0x00000007);

WREG32(EVERGREEN_DC_LUT_RW_INDEX + radeon_crtc->crtc_offset, 0);
+ r = crtc->gamma_store;
+ g = r + crtc->gamma_size;
+ b = g + crtc->gamma_size;
for (i = 0; i < 256; i++) {
WREG32(EVERGREEN_DC_LUT_30_COLOR + radeon_crtc->crtc_offset,
- (radeon_crtc->lut_r[i] << 20) |
- (radeon_crtc->lut_g[i] << 10) |
- (radeon_crtc->lut_b[i] << 0));
+ ((*r++ & 0xffc0) << 14) |
+ ((*g++ & 0xffc0) << 4) |
+ (*b++ >> 6));
}

WREG32(NI_DEGAMMA_CONTROL + radeon_crtc->crtc_offset,
@@ -172,6 +184,7 @@ static void legacy_crtc_load_lut(struct drm_crtc *crtc)
struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
struct drm_device *dev = crtc->dev;
struct radeon_device *rdev = dev->dev_private;
+ u16 *r, *g, *b;
int i;
uint32_t dac2_cntl;

@@ -183,11 +196,14 @@ static void legacy_crtc_load_lut(struct drm_crtc *crtc)
WREG32(RADEON_DAC_CNTL2, dac2_cntl);

WREG8(RADEON_PALETTE_INDEX, 0);
+ r = crtc->gamma_store;
+ g = r + crtc->gamma_size;
+ b = g + crtc->gamma_size;
for (i = 0; i < 256; i++) {
WREG32(RADEON_PALETTE_30_DATA,
- (radeon_crtc->lut_r[i] << 20) |
- (radeon_crtc->lut_g[i] << 10) |
- (radeon_crtc->lut_b[i] << 0));
+ ((*r++ & 0xffc0) << 14) |
+ ((*g++ & 0xffc0) << 4) |
+ (*b++ >> 6));
}
}

@@ -209,41 +225,10 @@ void radeon_crtc_load_lut(struct drm_crtc *crtc)
legacy_crtc_load_lut(crtc);
}

-/** Sets the color ramps on behalf of fbcon */
-void radeon_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
- u16 blue, int regno)
-{
- struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
-
- radeon_crtc->lut_r[regno] = red >> 6;
- radeon_crtc->lut_g[regno] = green >> 6;
- radeon_crtc->lut_b[regno] = blue >> 6;
-}
-
-/** Gets the color ramps on behalf of fbcon */
-void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
- u16 *blue, int regno)
-{
- struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
-
- *red = radeon_crtc->lut_r[regno] << 6;
- *green = radeon_crtc->lut_g[regno] << 6;
- *blue = radeon_crtc->lut_b[regno] << 6;
-}
-
static int radeon_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, uint32_t size,
struct drm_modeset_acquire_ctx *ctx)
{
- struct radeon_crtc *radeon_crtc = to_radeon_crtc(crtc);
- int i;
-
- /* userspace palettes are always correct as is */
- for (i = 0; i < size; i++) {
- radeon_crtc->lut_r[i] = red[i] >> 6;
- radeon_crtc->lut_g[i] = green[i] >> 6;
- radeon_crtc->lut_b[i] = blue[i] >> 6;
- }
radeon_crtc_load_lut(crtc);

return 0;
diff --git a/drivers/gpu/drm/radeon/radeon_fb.c b/drivers/gpu/drm/radeon/radeon_fb.c
index 356ad90..638bcb55 100644
--- a/drivers/gpu/drm/radeon/radeon_fb.c
+++ b/drivers/gpu/drm/radeon/radeon_fb.c
@@ -332,8 +332,6 @@ static int radeon_fbdev_destroy(struct drm_device *dev, struct radeon_fbdev *rfb
}

static const struct drm_fb_helper_funcs radeon_fb_helper_funcs = {
- .gamma_set = radeon_crtc_fb_gamma_set,
- .gamma_get = radeon_crtc_fb_gamma_get,
.fb_probe = radeonfb_create,
};

diff --git a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
index ce6cb66..1f1856e 100644
--- a/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
+++ b/drivers/gpu/drm/radeon/radeon_legacy_crtc.c
@@ -1116,7 +1116,6 @@ static const struct drm_crtc_helper_funcs legacy_helper_funcs = {
.mode_set_base_atomic = radeon_crtc_set_base_atomic,
.prepare = radeon_crtc_prepare,
.commit = radeon_crtc_commit,
- .load_lut = radeon_crtc_load_lut,
.disable = radeon_crtc_disable
};

diff --git a/drivers/gpu/drm/radeon/radeon_mode.h b/drivers/gpu/drm/radeon/radeon_mode.h
index 00f5ec5..da44ac2 100644
--- a/drivers/gpu/drm/radeon/radeon_mode.h
+++ b/drivers/gpu/drm/radeon/radeon_mode.h
@@ -935,10 +935,6 @@ extern void
radeon_combios_encoder_crtc_scratch_regs(struct drm_encoder *encoder, int crtc);
extern void
radeon_combios_encoder_dpms_scratch_regs(struct drm_encoder *encoder, bool on);
-extern void radeon_crtc_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
- u16 blue, int regno);
-extern void radeon_crtc_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
- u16 *blue, int regno);
int radeon_framebuffer_init(struct drm_device *dev,
struct radeon_framebuffer *rfb,
const struct drm_mode_fb_cmd2 *mode_cmd,
--
2.1.4
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