summaryrefslogtreecommitdiff
path: root/drivers/gpu/drm/armada/armada_crtc.c
diff options
context:
space:
mode:
authorRussell King <rmk+kernel@armlinux.org.uk>2018-07-01 17:46:26 +0300
committerRussell King <rmk+kernel@armlinux.org.uk>2019-05-17 14:16:32 +0300
commitd0d765dec6b7e6dc5d6c153784f1a80a1f5bf3c5 (patch)
tree47c90d7e7e2c0ca8da6b8faae309a06b41cbd3f9 /drivers/gpu/drm/armada/armada_crtc.c
parent7d62237da6ec072292c2f738ebffbf10f6a101cf (diff)
downloadlinux-d0d765dec6b7e6dc5d6c153784f1a80a1f5bf3c5.tar.xz
drm/armada: add support for setting gamma
Add support for setting gamma through both the legacy interfaces and the atomic interfaces. Signed-off-by: Russell King <rmk+kernel@armlinux.org.uk>
Diffstat (limited to 'drivers/gpu/drm/armada/armada_crtc.c')
-rw-r--r--drivers/gpu/drm/armada/armada_crtc.c63
1 files changed, 63 insertions, 0 deletions
diff --git a/drivers/gpu/drm/armada/armada_crtc.c b/drivers/gpu/drm/armada/armada_crtc.c
index 09bade15f51c..5991feb1bcc9 100644
--- a/drivers/gpu/drm/armada/armada_crtc.c
+++ b/drivers/gpu/drm/armada/armada_crtc.c
@@ -130,6 +130,44 @@ static void armada_drm_crtc_queue_state_event(struct drm_crtc *crtc)
}
}
+static void armada_drm_update_gamma(struct drm_crtc *crtc)
+{
+ struct drm_property_blob *blob = crtc->state->gamma_lut;
+ void __iomem *base = drm_to_armada_crtc(crtc)->base;
+ int i;
+
+ if (blob) {
+ struct drm_color_lut *lut = blob->data;
+
+ armada_updatel(CFG_CSB_256x8, CFG_CSB_256x8 | CFG_PDWN256x8,
+ base + LCD_SPU_SRAM_PARA1);
+
+ for (i = 0; i < 256; i++) {
+ writel_relaxed(drm_color_lut_extract(lut[i].red, 8),
+ base + LCD_SPU_SRAM_WRDAT);
+ writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_YR,
+ base + LCD_SPU_SRAM_CTRL);
+ readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
+ writel_relaxed(drm_color_lut_extract(lut[i].green, 8),
+ base + LCD_SPU_SRAM_WRDAT);
+ writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_UG,
+ base + LCD_SPU_SRAM_CTRL);
+ readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
+ writel_relaxed(drm_color_lut_extract(lut[i].blue, 8),
+ base + LCD_SPU_SRAM_WRDAT);
+ writel_relaxed(i | SRAM_WRITE | SRAM_GAMMA_VB,
+ base + LCD_SPU_SRAM_CTRL);
+ readl_relaxed(base + LCD_SPU_HWC_OVSA_HPXL_VLN);
+ }
+ armada_updatel(CFG_GAMMA_ENA, CFG_GAMMA_ENA,
+ base + LCD_SPU_DMA_CTRL0);
+ } else {
+ armada_updatel(0, CFG_GAMMA_ENA, base + LCD_SPU_DMA_CTRL0);
+ armada_updatel(CFG_PDWN256x8, CFG_CSB_256x8 | CFG_PDWN256x8,
+ base + LCD_SPU_SRAM_PARA1);
+ }
+}
+
/* The mode_config.mutex will be held for this call */
static bool armada_drm_crtc_mode_fixup(struct drm_crtc *crtc,
const struct drm_display_mode *mode, struct drm_display_mode *adj)
@@ -338,6 +376,20 @@ static void armada_drm_crtc_mode_set_nofb(struct drm_crtc *crtc)
spin_unlock_irqrestore(&dcrtc->irq_lock, flags);
}
+static int armada_drm_crtc_atomic_check(struct drm_crtc *crtc,
+ struct drm_crtc_state *state)
+{
+ DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
+
+ if (state->gamma_lut && drm_color_lut_size(state->gamma_lut) != 256)
+ return -EINVAL;
+
+ if (state->color_mgmt_changed)
+ state->planes_changed = true;
+
+ return 0;
+}
+
static void armada_drm_crtc_atomic_begin(struct drm_crtc *crtc,
struct drm_crtc_state *old_crtc_state)
{
@@ -345,6 +397,9 @@ static void armada_drm_crtc_atomic_begin(struct drm_crtc *crtc,
DRM_DEBUG_KMS("[CRTC:%d:%s]\n", crtc->base.id, crtc->name);
+ if (crtc->state->color_mgmt_changed)
+ armada_drm_update_gamma(crtc);
+
dcrtc->regs_idx = 0;
dcrtc->regs = dcrtc->atomic_regs;
}
@@ -439,6 +494,7 @@ static void armada_drm_crtc_atomic_enable(struct drm_crtc *crtc,
static const struct drm_crtc_helper_funcs armada_crtc_helper_funcs = {
.mode_fixup = armada_drm_crtc_mode_fixup,
.mode_set_nofb = armada_drm_crtc_mode_set_nofb,
+ .atomic_check = armada_drm_crtc_atomic_check,
.atomic_begin = armada_drm_crtc_atomic_begin,
.atomic_flush = armada_drm_crtc_atomic_flush,
.atomic_disable = armada_drm_crtc_atomic_disable,
@@ -702,6 +758,7 @@ static const struct drm_crtc_funcs armada_crtc_funcs = {
.cursor_set = armada_drm_crtc_cursor_set,
.cursor_move = armada_drm_crtc_cursor_move,
.destroy = armada_drm_crtc_destroy,
+ .gamma_set = drm_atomic_helper_legacy_gamma_set,
.set_config = drm_atomic_helper_set_config,
.page_flip = drm_atomic_helper_page_flip,
.atomic_duplicate_state = drm_atomic_helper_crtc_duplicate_state,
@@ -793,6 +850,12 @@ static int armada_drm_crtc_create(struct drm_device *drm, struct device *dev,
drm_crtc_helper_add(&dcrtc->crtc, &armada_crtc_helper_funcs);
+ ret = drm_mode_crtc_set_gamma_size(&dcrtc->crtc, 256);
+ if (ret)
+ return ret;
+
+ drm_crtc_enable_color_mgmt(&dcrtc->crtc, 0, false, 256);
+
return armada_overlay_plane_create(drm, 1 << dcrtc->num);
err_crtc_init: