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Subject[PATCH v4 13/14] drm: stm: remove dead code and pointless local lut storage
Date
The redundant fb helper .load_lut is no longer used, and can not
work right without also providing the fb helpers .gamma_set and
.gamma_get thus rendering the code in this driver suspect.

Just remove the dead code.

Signed-off-by: Peter Rosin <peda@axentia.se>
---
drivers/gpu/drm/stm/ltdc.c | 12 ------------
drivers/gpu/drm/stm/ltdc.h | 1 -
2 files changed, 13 deletions(-)

diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
index 5331760..3e95b4d 100644
--- a/drivers/gpu/drm/stm/ltdc.c
+++ b/drivers/gpu/drm/stm/ltdc.c
@@ -375,17 +375,6 @@ static irqreturn_t ltdc_irq(int irq, void *arg)
* DRM_CRTC
*/

-static void ltdc_crtc_load_lut(struct drm_crtc *crtc)
-{
- struct ltdc_device *ldev = crtc_to_ltdc(crtc);
- unsigned int i, lay;
-
- for (lay = 0; lay < ldev->caps.nb_layers; lay++)
- for (i = 0; i < 256; i++)
- reg_write(ldev->regs, LTDC_L1CLUTWR + lay * LAY_OFS,
- ldev->clut[i]);
-}
-
static void ltdc_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_crtc_state *old_state)
{
@@ -525,7 +514,6 @@ static void ltdc_crtc_atomic_flush(struct drm_crtc *crtc,
}

static struct drm_crtc_helper_funcs ltdc_crtc_helper_funcs = {
- .load_lut = ltdc_crtc_load_lut,
.mode_set_nofb = ltdc_crtc_mode_set_nofb,
.atomic_flush = ltdc_crtc_atomic_flush,
.atomic_enable = ltdc_crtc_atomic_enable,
diff --git a/drivers/gpu/drm/stm/ltdc.h b/drivers/gpu/drm/stm/ltdc.h
index d7a9c73..620ca55 100644
--- a/drivers/gpu/drm/stm/ltdc.h
+++ b/drivers/gpu/drm/stm/ltdc.h
@@ -27,7 +27,6 @@ struct ltdc_device {
struct drm_panel *panel;
struct mutex err_lock; /* protecting error_status */
struct ltdc_caps caps;
- u32 clut[256]; /* color look up table */
u32 error_status;
u32 irq_status;
};
--
2.1.4
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