[PATCH 13/14] drm/kmb: Enable alpha blended second plane
Sam Ravnborg
sam at ravnborg.org
Wed Jul 28 07:29:07 UTC 2021
Hi Anitha,
On Tue, Jul 27, 2021 at 05:31:25PM -0700, Anitha Chrisanthus wrote:
> From: Edmund Dea <edmund.j.dea at intel.com>
>
> Enable one additional plane that is alpha blended on top
> of the primary plane.
>
> Signed-off-by: Edmund Dea <edmund.j.dea at intel.com>
Your s-o-b is missing.
With this fixed:
Acked-by: Sam Ravnborg <sam at ravnborg.org>
> ---
> drivers/gpu/drm/kmb/kmb_drv.c | 8 ++--
> drivers/gpu/drm/kmb/kmb_plane.c | 81 +++++++++++++++++++++++++++++----
> drivers/gpu/drm/kmb/kmb_plane.h | 5 +-
> drivers/gpu/drm/kmb/kmb_regs.h | 3 ++
> 4 files changed, 82 insertions(+), 15 deletions(-)
>
> diff --git a/drivers/gpu/drm/kmb/kmb_drv.c b/drivers/gpu/drm/kmb/kmb_drv.c
> index 12f35c43d838..d0de1db03493 100644
> --- a/drivers/gpu/drm/kmb/kmb_drv.c
> +++ b/drivers/gpu/drm/kmb/kmb_drv.c
> @@ -173,10 +173,10 @@ static int kmb_setup_mode_config(struct drm_device *drm)
> ret = drmm_mode_config_init(drm);
> if (ret)
> return ret;
> - drm->mode_config.min_width = KMB_MIN_WIDTH;
> - drm->mode_config.min_height = KMB_MIN_HEIGHT;
> - drm->mode_config.max_width = KMB_MAX_WIDTH;
> - drm->mode_config.max_height = KMB_MAX_HEIGHT;
> + drm->mode_config.min_width = KMB_FB_MIN_WIDTH;
> + drm->mode_config.min_height = KMB_FB_MIN_HEIGHT;
> + drm->mode_config.max_width = KMB_FB_MAX_WIDTH;
> + drm->mode_config.max_height = KMB_FB_MAX_HEIGHT;
> drm->mode_config.funcs = &kmb_mode_config_funcs;
>
> ret = kmb_setup_crtc(drm);
> diff --git a/drivers/gpu/drm/kmb/kmb_plane.c b/drivers/gpu/drm/kmb/kmb_plane.c
> index 4523af949ea1..cbe4e981d73e 100644
> --- a/drivers/gpu/drm/kmb/kmb_plane.c
> +++ b/drivers/gpu/drm/kmb/kmb_plane.c
> @@ -118,9 +118,10 @@ static int kmb_plane_atomic_check(struct drm_plane *plane,
> if (ret)
> return ret;
>
> - if (new_plane_state->crtc_w > KMB_MAX_WIDTH || new_plane_state->crtc_h > KMB_MAX_HEIGHT)
> - return -EINVAL;
> - if (new_plane_state->crtc_w < KMB_MIN_WIDTH || new_plane_state->crtc_h < KMB_MIN_HEIGHT)
> + if (new_plane_state->crtc_w > KMB_FB_MAX_WIDTH ||
> + new_plane_state->crtc_h > KMB_FB_MAX_HEIGHT ||
> + new_plane_state->crtc_w < KMB_FB_MIN_WIDTH ||
> + new_plane_state->crtc_h < KMB_FB_MIN_HEIGHT)
> return -EINVAL;
>
> /* Due to HW limitations, changing plane height or width after
> @@ -311,6 +312,44 @@ static void config_csc(struct kmb_drm_private *kmb, int plane_id)
> kmb_write_lcd(kmb, LCD_LAYERn_CSC_OFF3(plane_id), csc_coef_lcd[11]);
> }
>
> +static void kmb_plane_set_alpha(struct kmb_drm_private *kmb,
> + const struct drm_plane_state *state,
> + unsigned char plane_id,
> + unsigned int *val)
> +{
> + u16 plane_alpha = state->alpha;
> + u16 pixel_blend_mode = state->pixel_blend_mode;
> + int has_alpha = state->fb->format->has_alpha;
> +
> + if (plane_alpha != DRM_BLEND_ALPHA_OPAQUE)
> + *val |= LCD_LAYER_ALPHA_STATIC;
> +
> + if (has_alpha) {
> + switch (pixel_blend_mode) {
> + case DRM_MODE_BLEND_PIXEL_NONE:
> + break;
> + case DRM_MODE_BLEND_PREMULTI:
> + *val |= LCD_LAYER_ALPHA_EMBED | LCD_LAYER_ALPHA_PREMULT;
> + break;
> + case DRM_MODE_BLEND_COVERAGE:
> + *val |= LCD_LAYER_ALPHA_EMBED;
> + break;
> + default:
> + DRM_DEBUG("Missing pixel blend mode case (%s == %ld)\n",
> + __stringify(pixel_blend_mode),
> + (long)pixel_blend_mode);
> + break;
> + }
> + }
> +
> + if (plane_alpha == DRM_BLEND_ALPHA_OPAQUE && !has_alpha) {
> + *val &= LCD_LAYER_ALPHA_DISABLED;
> + return;
> + }
> +
> + kmb_write_lcd(kmb, LCD_LAYERn_ALPHA(plane_id), plane_alpha);
> +}
> +
> static void kmb_plane_atomic_update(struct drm_plane *plane,
> struct drm_atomic_state *state)
> {
> @@ -341,11 +380,12 @@ static void kmb_plane_atomic_update(struct drm_plane *plane,
> fb = new_plane_state->fb;
> if (!fb)
> return;
> +
> num_planes = fb->format->num_planes;
> kmb_plane = to_kmb_plane(plane);
> - plane_id = kmb_plane->id;
>
> kmb = to_kmb(plane->dev);
> + plane_id = kmb_plane->id;
>
> spin_lock_irq(&kmb->irq_lock);
> if (kmb->kmb_under_flow || kmb->kmb_flush_done) {
> @@ -467,20 +507,32 @@ static void kmb_plane_atomic_update(struct drm_plane *plane,
> config_csc(kmb, plane_id);
> }
>
> + kmb_plane_set_alpha(kmb, plane->state, plane_id, &val);
> +
> kmb_write_lcd(kmb, LCD_LAYERn_CFG(plane_id), val);
>
> + /* Configure LCD_CONTROL */
> + ctrl = kmb_read_lcd(kmb, LCD_CONTROL);
> +
> + /* Set layer blending config */
> + ctrl &= ~LCD_CTRL_ALPHA_ALL;
> + ctrl |= LCD_CTRL_ALPHA_BOTTOM_VL1 |
> + LCD_CTRL_ALPHA_BLEND_VL2;
> +
> + ctrl &= ~LCD_CTRL_ALPHA_BLEND_BKGND_DISABLE;
> +
> switch (plane_id) {
> case LAYER_0:
> - ctrl = LCD_CTRL_VL1_ENABLE;
> + ctrl |= LCD_CTRL_VL1_ENABLE;
> break;
> case LAYER_1:
> - ctrl = LCD_CTRL_VL2_ENABLE;
> + ctrl |= LCD_CTRL_VL2_ENABLE;
> break;
> case LAYER_2:
> - ctrl = LCD_CTRL_GL1_ENABLE;
> + ctrl |= LCD_CTRL_GL1_ENABLE;
> break;
> case LAYER_3:
> - ctrl = LCD_CTRL_GL2_ENABLE;
> + ctrl |= LCD_CTRL_GL2_ENABLE;
> break;
> }
>
> @@ -492,7 +544,7 @@ static void kmb_plane_atomic_update(struct drm_plane *plane,
> */
> ctrl |= LCD_CTRL_VHSYNC_IDLE_LVL;
>
> - kmb_set_bitmask_lcd(kmb, LCD_CONTROL, ctrl);
> + kmb_write_lcd(kmb, LCD_CONTROL, ctrl);
>
> /* Enable pipeline AXI read transactions for the DMA
> * after setting graphics layers. This must be done
> @@ -567,6 +619,9 @@ struct kmb_plane *kmb_plane_init(struct drm_device *drm)
> enum drm_plane_type plane_type;
> const u32 *plane_formats;
> int num_plane_formats;
> + unsigned int blend_caps = BIT(DRM_MODE_BLEND_PIXEL_NONE) |
> + BIT(DRM_MODE_BLEND_PREMULTI) |
> + BIT(DRM_MODE_BLEND_COVERAGE);
>
> for (i = 0; i < KMB_MAX_PLANES; i++) {
> plane = drmm_kzalloc(drm, sizeof(*plane), GFP_KERNEL);
> @@ -598,8 +653,16 @@ struct kmb_plane *kmb_plane_init(struct drm_device *drm)
> drm_dbg(drm, "%s : %d i=%d type=%d",
> __func__, __LINE__,
> i, plane_type);
> + drm_plane_create_alpha_property(&plane->base_plane);
> +
> + drm_plane_create_blend_mode_property(&plane->base_plane,
> + blend_caps);
> +
> + drm_plane_create_zpos_immutable_property(&plane->base_plane, i);
> +
> drm_plane_helper_add(&plane->base_plane,
> &kmb_plane_helper_funcs);
> +
> if (plane_type == DRM_PLANE_TYPE_PRIMARY) {
> primary = plane;
> kmb->plane = plane;
> diff --git a/drivers/gpu/drm/kmb/kmb_plane.h b/drivers/gpu/drm/kmb/kmb_plane.h
> index 99207b35365c..b51144044fe8 100644
> --- a/drivers/gpu/drm/kmb/kmb_plane.h
> +++ b/drivers/gpu/drm/kmb/kmb_plane.h
> @@ -35,6 +35,9 @@
> #define POSSIBLE_CRTCS 1
> #define to_kmb_plane(x) container_of(x, struct kmb_plane, base_plane)
>
> +#define POSSIBLE_CRTCS 1
> +#define KMB_MAX_PLANES 2
> +
> enum layer_id {
> LAYER_0,
> LAYER_1,
> @@ -43,8 +46,6 @@ enum layer_id {
> /* KMB_MAX_PLANES */
> };
>
> -#define KMB_MAX_PLANES 1
> -
> enum sub_plane_id {
> Y_PLANE,
> U_PLANE,
> diff --git a/drivers/gpu/drm/kmb/kmb_regs.h b/drivers/gpu/drm/kmb/kmb_regs.h
> index 48150569f702..9756101b0d32 100644
> --- a/drivers/gpu/drm/kmb/kmb_regs.h
> +++ b/drivers/gpu/drm/kmb/kmb_regs.h
> @@ -43,8 +43,10 @@
> #define LCD_CTRL_OUTPUT_ENABLED BIT(19)
> #define LCD_CTRL_BPORCH_ENABLE BIT(21)
> #define LCD_CTRL_FPORCH_ENABLE BIT(22)
> +#define LCD_CTRL_ALPHA_BLEND_BKGND_DISABLE BIT(23)
> #define LCD_CTRL_PIPELINE_DMA BIT(28)
> #define LCD_CTRL_VHSYNC_IDLE_LVL BIT(31)
> +#define LCD_CTRL_ALPHA_ALL (0xff << 6)
>
> /* interrupts */
> #define LCD_INT_STATUS (0x4 * 0x001)
> @@ -115,6 +117,7 @@
> #define LCD_LAYER_ALPHA_EMBED BIT(5)
> #define LCD_LAYER_ALPHA_COMBI (LCD_LAYER_ALPHA_STATIC | \
> LCD_LAYER_ALPHA_EMBED)
> +#define LCD_LAYER_ALPHA_DISABLED ~(LCD_LAYER_ALPHA_COMBI)
> /* RGB multiplied with alpha */
> #define LCD_LAYER_ALPHA_PREMULT BIT(6)
> #define LCD_LAYER_INVERT_COL BIT(7)
> --
> 2.25.1
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