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Message-Id: <20211025191025.114156921@linuxfoundation.org>
Date: Mon, 25 Oct 2021 21:14:01 +0200
From: Greg Kroah-Hartman <gregkh@...uxfoundation.org>
To: linux-kernel@...r.kernel.org
Cc: Greg Kroah-Hartman <gregkh@...uxfoundation.org>,
stable@...r.kernel.org, Edmund Dea <edmund.j.dea@...el.com>,
Anitha Chrisanthus <anitha.chrisanthus@...el.com>,
Sam Ravnborg <sam@...nborg.org>,
Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>,
Sasha Levin <sashal@...nel.org>
Subject: [PATCH 5.14 060/169] drm/kmb: Disable change of plane parameters
From: Edmund Dea <edmund.j.dea@...el.com>
[ Upstream commit 982f8ad666a1123028a077b6b009871a0dc9df26 ]
Due to HW limitations, KMB cannot change height, width, or
pixel format after initial plane configuration.
v2: removed memset disp_cfg as it is already zero.
Fixes: 7f7b96a8a0a1 ("drm/kmb: Add support for KeemBay Display")
Signed-off-by: Edmund Dea <edmund.j.dea@...el.com>
Signed-off-by: Anitha Chrisanthus <anitha.chrisanthus@...el.com>
Acked-by: Sam Ravnborg <sam@...nborg.org>
Link: https://patchwork.freedesktop.org/patch/msgid/20211013233632.471892-4-anitha.chrisanthus@intel.com
Signed-off-by: Maarten Lankhorst <maarten.lankhorst@...ux.intel.com>
Signed-off-by: Sasha Levin <sashal@...nel.org>
---
drivers/gpu/drm/kmb/kmb_drv.h | 1 +
drivers/gpu/drm/kmb/kmb_plane.c | 43 ++++++++++++++++++++++++++++++++-
drivers/gpu/drm/kmb/kmb_plane.h | 6 +++++
3 files changed, 49 insertions(+), 1 deletion(-)
diff --git a/drivers/gpu/drm/kmb/kmb_drv.h b/drivers/gpu/drm/kmb/kmb_drv.h
index ebbaa5f422d5..178aa14f2efc 100644
--- a/drivers/gpu/drm/kmb/kmb_drv.h
+++ b/drivers/gpu/drm/kmb/kmb_drv.h
@@ -45,6 +45,7 @@ struct kmb_drm_private {
spinlock_t irq_lock;
int irq_lcd;
int sys_clk_mhz;
+ struct disp_cfg init_disp_cfg[KMB_MAX_PLANES];
struct layer_status plane_status[KMB_MAX_PLANES];
int kmb_under_flow;
int kmb_flush_done;
diff --git a/drivers/gpu/drm/kmb/kmb_plane.c b/drivers/gpu/drm/kmb/kmb_plane.c
index ecee6782612d..45cb096455b5 100644
--- a/drivers/gpu/drm/kmb/kmb_plane.c
+++ b/drivers/gpu/drm/kmb/kmb_plane.c
@@ -67,8 +67,21 @@ static const u32 kmb_formats_v[] = {
static unsigned int check_pixel_format(struct drm_plane *plane, u32 format)
{
+ struct kmb_drm_private *kmb;
+ struct kmb_plane *kmb_plane = to_kmb_plane(plane);
int i;
+ int plane_id = kmb_plane->id;
+ struct disp_cfg init_disp_cfg;
+ kmb = to_kmb(plane->dev);
+ init_disp_cfg = kmb->init_disp_cfg[plane_id];
+ /* Due to HW limitations, changing pixel format after initial
+ * plane configuration is not supported.
+ */
+ if (init_disp_cfg.format && init_disp_cfg.format != format) {
+ drm_dbg(&kmb->drm, "Cannot change format after initial plane configuration");
+ return -EINVAL;
+ }
for (i = 0; i < plane->format_count; i++) {
if (plane->format_types[i] == format)
return 0;
@@ -81,11 +94,17 @@ static int kmb_plane_atomic_check(struct drm_plane *plane,
{
struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
plane);
+ struct kmb_drm_private *kmb;
+ struct kmb_plane *kmb_plane = to_kmb_plane(plane);
+ int plane_id = kmb_plane->id;
+ struct disp_cfg init_disp_cfg;
struct drm_framebuffer *fb;
int ret;
struct drm_crtc_state *crtc_state;
bool can_position;
+ kmb = to_kmb(plane->dev);
+ init_disp_cfg = kmb->init_disp_cfg[plane_id];
fb = new_plane_state->fb;
if (!fb || !new_plane_state->crtc)
return 0;
@@ -98,6 +117,16 @@ static int kmb_plane_atomic_check(struct drm_plane *plane,
return -EINVAL;
if (new_plane_state->crtc_w < KMB_MIN_WIDTH || new_plane_state->crtc_h < KMB_MIN_HEIGHT)
return -EINVAL;
+
+ /* Due to HW limitations, changing plane height or width after
+ * initial plane configuration is not supported.
+ */
+ if ((init_disp_cfg.width && init_disp_cfg.height) &&
+ (init_disp_cfg.width != fb->width ||
+ init_disp_cfg.height != fb->height)) {
+ drm_dbg(&kmb->drm, "Cannot change plane height or width after initial configuration");
+ return -EINVAL;
+ }
can_position = (plane->type == DRM_PLANE_TYPE_OVERLAY);
crtc_state =
drm_atomic_get_existing_crtc_state(state,
@@ -296,6 +325,7 @@ static void kmb_plane_atomic_update(struct drm_plane *plane,
unsigned char plane_id;
int num_planes;
static dma_addr_t addr[MAX_SUB_PLANES];
+ struct disp_cfg *init_disp_cfg;
if (!plane || !new_plane_state || !old_plane_state)
return;
@@ -317,7 +347,8 @@ static void kmb_plane_atomic_update(struct drm_plane *plane,
}
spin_unlock_irq(&kmb->irq_lock);
- src_w = (new_plane_state->src_w >> 16);
+ init_disp_cfg = &kmb->init_disp_cfg[plane_id];
+ src_w = new_plane_state->src_w >> 16;
src_h = new_plane_state->src_h >> 16;
crtc_x = new_plane_state->crtc_x;
crtc_y = new_plane_state->crtc_y;
@@ -448,6 +479,16 @@ static void kmb_plane_atomic_update(struct drm_plane *plane,
/* Enable DMA */
kmb_write_lcd(kmb, LCD_LAYERn_DMA_CFG(plane_id), dma_cfg);
+
+ /* Save initial display config */
+ if (!init_disp_cfg->width ||
+ !init_disp_cfg->height ||
+ !init_disp_cfg->format) {
+ init_disp_cfg->width = width;
+ init_disp_cfg->height = height;
+ init_disp_cfg->format = fb->format->format;
+ }
+
drm_dbg(&kmb->drm, "dma_cfg=0x%x LCD_DMA_CFG=0x%x\n", dma_cfg,
kmb_read_lcd(kmb, LCD_LAYERn_DMA_CFG(plane_id)));
diff --git a/drivers/gpu/drm/kmb/kmb_plane.h b/drivers/gpu/drm/kmb/kmb_plane.h
index 486490f7a3ec..99207b35365c 100644
--- a/drivers/gpu/drm/kmb/kmb_plane.h
+++ b/drivers/gpu/drm/kmb/kmb_plane.h
@@ -62,6 +62,12 @@ struct layer_status {
u32 ctrl;
};
+struct disp_cfg {
+ unsigned int width;
+ unsigned int height;
+ unsigned int format;
+};
+
struct kmb_plane *kmb_plane_init(struct drm_device *drm);
void kmb_plane_destroy(struct drm_plane *plane);
#endif /* __KMB_PLANE_H__ */
--
2.33.0
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