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Message-Id: <20210811172309.314287-6-paul@crapouillou.net>
Date: Wed, 11 Aug 2021 19:23:08 +0200
From: Paul Cercueil <paul@...pouillou.net>
To: David Airlie <airlied@...ux.ie>, Daniel Vetter <daniel@...ll.ch>
Cc: "H . Nikolaus Schaller" <hns@...delico.com>,
Paul Boddie <paul@...die.org.uk>,
Sam Ravnborg <sam@...nborg.org>, list@...ndingux.net,
linux-mips@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, Paul Cercueil <paul@...pouillou.net>
Subject: [PATCH v2 5/6] drm/ingenic: Upload palette before frame
When using C8 color mode, make sure that the palette is always uploaded
before a frame; otherwise the very first frame will have wrong colors.
Do that by changing the link order of the DMA descriptors.
Signed-off-by: Paul Cercueil <paul@...pouillou.net>
---
drivers/gpu/drm/ingenic/ingenic-drm-drv.c | 53 ++++++++++++++++++++---
1 file changed, 47 insertions(+), 6 deletions(-)
diff --git a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
index cbc76cede99e..6f860f2e11c4 100644
--- a/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
+++ b/drivers/gpu/drm/ingenic/ingenic-drm-drv.c
@@ -66,6 +66,7 @@ struct jz_soc_info {
struct ingenic_drm_private_state {
struct drm_private_state base;
+ bool use_palette;
};
struct ingenic_drm {
@@ -113,6 +114,30 @@ to_ingenic_drm_priv_state(struct drm_private_state *state)
return container_of(state, struct ingenic_drm_private_state, base);
}
+static struct ingenic_drm_private_state *
+ingenic_drm_get_priv_state(struct ingenic_drm *priv, struct drm_atomic_state *state)
+{
+ struct drm_private_state *priv_state;
+
+ priv_state = drm_atomic_get_private_obj_state(state, &priv->private_obj);
+ if (IS_ERR(priv_state))
+ return ERR_CAST(priv_state);
+
+ return to_ingenic_drm_priv_state(priv_state);
+}
+
+static struct ingenic_drm_private_state *
+ingenic_drm_get_new_priv_state(struct ingenic_drm *priv, struct drm_atomic_state *state)
+{
+ struct drm_private_state *priv_state;
+
+ priv_state = drm_atomic_get_new_private_obj_state(state, &priv->private_obj);
+ if (!priv_state)
+ return NULL;
+
+ return to_ingenic_drm_priv_state(priv_state);
+}
+
static bool ingenic_drm_writeable_reg(struct device *dev, unsigned int reg)
{
switch (reg) {
@@ -183,11 +208,18 @@ static void ingenic_drm_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_atomic_state *state)
{
struct ingenic_drm *priv = drm_crtc_get_priv(crtc);
+ struct ingenic_drm_private_state *priv_state;
+ unsigned int next_id;
+
+ priv_state = ingenic_drm_get_new_priv_state(priv, state);
+ if (WARN_ON(!priv_state))
+ return;
regmap_write(priv->map, JZ_REG_LCD_STATE, 0);
- /* Set address of our DMA descriptor chain */
- regmap_write(priv->map, JZ_REG_LCD_DA0, dma_hwdesc_addr(priv, 0));
+ /* Set addresses of our DMA descriptor chains */
+ next_id = priv_state->use_palette ? HWDESC_PALETTE : 0;
+ regmap_write(priv->map, JZ_REG_LCD_DA0, dma_hwdesc_addr(priv, next_id));
regmap_write(priv->map, JZ_REG_LCD_DA1, dma_hwdesc_addr(priv, 1));
regmap_update_bits(priv->map, JZ_REG_LCD_CTRL,
@@ -393,6 +425,7 @@ static int ingenic_drm_plane_atomic_check(struct drm_plane *plane,
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
struct ingenic_drm *priv = drm_device_get_priv(plane->dev);
+ struct ingenic_drm_private_state *priv_state;
struct drm_crtc_state *crtc_state;
struct drm_crtc *crtc = new_plane_state->crtc ?: old_plane_state->crtc;
int ret;
@@ -405,6 +438,10 @@ static int ingenic_drm_plane_atomic_check(struct drm_plane *plane,
if (WARN_ON(!crtc_state))
return -EINVAL;
+ priv_state = ingenic_drm_get_priv_state(priv, state);
+ if (IS_ERR(priv_state))
+ return PTR_ERR(priv_state);
+
ret = drm_atomic_helper_check_plane_state(new_plane_state, crtc_state,
DRM_PLANE_HELPER_NO_SCALING,
DRM_PLANE_HELPER_NO_SCALING,
@@ -423,6 +460,9 @@ static int ingenic_drm_plane_atomic_check(struct drm_plane *plane,
(new_plane_state->src_h >> 16) != new_plane_state->crtc_h))
return -EINVAL;
+ priv_state->use_palette = new_plane_state->fb &&
+ new_plane_state->fb->format->format == DRM_FORMAT_C8;
+
/*
* Require full modeset if enabling or disabling a plane, or changing
* its position, size or depth.
@@ -583,6 +623,7 @@ static void ingenic_drm_plane_atomic_update(struct drm_plane *plane,
struct drm_plane_state *newstate = drm_atomic_get_new_plane_state(state, plane);
struct drm_plane_state *oldstate = drm_atomic_get_old_plane_state(state, plane);
unsigned int width, height, cpp, next_id, plane_id;
+ struct ingenic_drm_private_state *priv_state;
struct drm_crtc_state *crtc_state;
struct ingenic_dma_hwdesc *hwdesc;
dma_addr_t addr;
@@ -600,19 +641,19 @@ static void ingenic_drm_plane_atomic_update(struct drm_plane *plane,
height = newstate->src_h >> 16;
cpp = newstate->fb->format->cpp[0];
- hwdesc = &priv->dma_hwdescs->hwdesc[plane_id];
+ priv_state = ingenic_drm_get_new_priv_state(priv, state);
+ next_id = (priv_state && priv_state->use_palette) ? HWDESC_PALETTE : plane_id;
+ hwdesc = &priv->dma_hwdescs->hwdesc[plane_id];
hwdesc->addr = addr;
hwdesc->cmd = JZ_LCD_CMD_EOF_IRQ | (width * height * cpp / 4);
+ hwdesc->next = dma_hwdesc_addr(priv, next_id);
if (drm_atomic_crtc_needs_modeset(crtc_state)) {
fourcc = newstate->fb->format->format;
ingenic_drm_plane_config(priv->dev, plane, fourcc);
- next_id = fourcc == DRM_FORMAT_C8 ? HWDESC_PALETTE : 0;
- priv->dma_hwdescs->hwdesc[0].next = dma_hwdesc_addr(priv, next_id);
-
crtc_state->color_mgmt_changed = fourcc == DRM_FORMAT_C8;
}
--
2.30.2
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