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Subject[PATCH v4 06/14] drm: ast: 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/ast/ast_drv.h | 1 -
drivers/gpu/drm/ast/ast_fb.c | 20 --------------------
drivers/gpu/drm/ast/ast_mode.c | 26 ++++++--------------------
3 files changed, 6 insertions(+), 41 deletions(-)

diff --git a/drivers/gpu/drm/ast/ast_drv.h b/drivers/gpu/drm/ast/ast_drv.h
index 8880f0b..569a148 100644
--- a/drivers/gpu/drm/ast/ast_drv.h
+++ b/drivers/gpu/drm/ast/ast_drv.h
@@ -245,7 +245,6 @@ struct ast_connector {

struct ast_crtc {
struct drm_crtc base;
- u8 lut_r[256], lut_g[256], lut_b[256];
struct drm_gem_object *cursor_bo;
uint64_t cursor_addr;
int cursor_width, cursor_height;
diff --git a/drivers/gpu/drm/ast/ast_fb.c b/drivers/gpu/drm/ast/ast_fb.c
index 4ad4acd..dbabcac 100644
--- a/drivers/gpu/drm/ast/ast_fb.c
+++ b/drivers/gpu/drm/ast/ast_fb.c
@@ -255,27 +255,7 @@ static int astfb_create(struct drm_fb_helper *helper,
return ret;
}

-static void ast_fb_gamma_set(struct drm_crtc *crtc, u16 red, u16 green,
- u16 blue, int regno)
-{
- struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
- ast_crtc->lut_r[regno] = red >> 8;
- ast_crtc->lut_g[regno] = green >> 8;
- ast_crtc->lut_b[regno] = blue >> 8;
-}
-
-static void ast_fb_gamma_get(struct drm_crtc *crtc, u16 *red, u16 *green,
- u16 *blue, int regno)
-{
- struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
- *red = ast_crtc->lut_r[regno] << 8;
- *green = ast_crtc->lut_g[regno] << 8;
- *blue = ast_crtc->lut_b[regno] << 8;
-}
-
static const struct drm_fb_helper_funcs ast_fb_helper_funcs = {
- .gamma_set = ast_fb_gamma_set,
- .gamma_get = ast_fb_gamma_get,
.fb_probe = astfb_create,
};

diff --git a/drivers/gpu/drm/ast/ast_mode.c b/drivers/gpu/drm/ast/ast_mode.c
index aaef0a6..724c16b 100644
--- a/drivers/gpu/drm/ast/ast_mode.c
+++ b/drivers/gpu/drm/ast/ast_mode.c
@@ -63,15 +63,18 @@ static inline void ast_load_palette_index(struct ast_private *ast,
static void ast_crtc_load_lut(struct drm_crtc *crtc)
{
struct ast_private *ast = crtc->dev->dev_private;
- struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
+ u16 *r, *g, *b;
int i;

if (!crtc->enabled)
return;

+ r = crtc->gamma_store;
+ g = r + crtc->gamma_size;
+ b = g + crtc->gamma_size;
+
for (i = 0; i < 256; i++)
- ast_load_palette_index(ast, i, ast_crtc->lut_r[i],
- ast_crtc->lut_g[i], ast_crtc->lut_b[i]);
+ ast_load_palette_index(ast, i, *r++ >> 8, *g++ >> 8, *b++ >> 8);
}

static bool ast_get_vbios_mode_info(struct drm_crtc *crtc, struct drm_display_mode *mode,
@@ -633,7 +636,6 @@ static const struct drm_crtc_helper_funcs ast_crtc_helper_funcs = {
.mode_set = ast_crtc_mode_set,
.mode_set_base = ast_crtc_mode_set_base,
.disable = ast_crtc_disable,
- .load_lut = ast_crtc_load_lut,
.prepare = ast_crtc_prepare,
.commit = ast_crtc_commit,

@@ -648,15 +650,6 @@ static int ast_crtc_gamma_set(struct drm_crtc *crtc, u16 *red, u16 *green,
u16 *blue, uint32_t size,
struct drm_modeset_acquire_ctx *ctx)
{
- struct ast_crtc *ast_crtc = to_ast_crtc(crtc);
- int i;
-
- /* userspace palettes are always correct as is */
- for (i = 0; i < size; i++) {
- ast_crtc->lut_r[i] = red[i] >> 8;
- ast_crtc->lut_g[i] = green[i] >> 8;
- ast_crtc->lut_b[i] = blue[i] >> 8;
- }
ast_crtc_load_lut(crtc);

return 0;
@@ -681,7 +674,6 @@ static const struct drm_crtc_funcs ast_crtc_funcs = {
static int ast_crtc_init(struct drm_device *dev)
{
struct ast_crtc *crtc;
- int i;

crtc = kzalloc(sizeof(struct ast_crtc), GFP_KERNEL);
if (!crtc)
@@ -690,12 +682,6 @@ static int ast_crtc_init(struct drm_device *dev)
drm_crtc_init(dev, &crtc->base, &ast_crtc_funcs);
drm_mode_crtc_set_gamma_size(&crtc->base, 256);
drm_crtc_helper_add(&crtc->base, &ast_crtc_helper_funcs);
-
- for (i = 0; i < 256; i++) {
- crtc->lut_r[i] = i;
- crtc->lut_g[i] = i;
- crtc->lut_b[i] = i;
- }
return 0;
}

--
2.1.4
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