[RFC PATCH 3/4] drm/arm/malidp: Set the AFBC register bits if the framebuffer has AFBC modifier

From: Ayan Kumar Halder
Date: Fri Jun 15 2018 - 09:52:53 EST

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Previous message: Ayan Kumar Halder: "[RFC PATCH 2/4] drm/arm/malidp: Implemented the size validation for AFBC framebuffers"
In reply to: Ayan Kumar Halder: "[RFC PATCH 2/4] drm/arm/malidp: Implemented the size validation for AFBC framebuffers"
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Added the AFBC decoder registers for DP500 , DP550 and DP650.
These registers control the processing of AFBC buffers. It controls various
features like AFBC decoder enable, lossless transformation and block split
as well as setting of the left, right, top and bottom cropping of AFBC buffers
(in number of pixels).
All the layers (except DE_SMART) support framebuffers with AFBC modifiers.
One needs to set the pixel values of the top, left, bottom and right cropping
for the AFBC framebuffer.
Added the functionality in malidp_de_plane_update() to set the various
registers for AFBC decoder, depending on the modifiers.

Signed-off-by: Ayan Kumar halder <ayan.halder@xxxxxxx>
Reviewed-by: Brian Starkey <brian.starkey@xxxxxxx>
---
drivers/gpu/drm/arm/malidp_hw.c | 27 ++++++++-----
drivers/gpu/drm/arm/malidp_hw.h | 2 +
drivers/gpu/drm/arm/malidp_planes.c | 81 +++++++++++++++++++++++++++++++++----
drivers/gpu/drm/arm/malidp_regs.h | 20 +++++++++
4 files changed, 111 insertions(+), 19 deletions(-)

diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index 4dbf39f..fd6b510 100644
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -76,33 +76,38 @@ static const struct malidp_format_id malidp550_de_formats[] = {

static const struct malidp_layer malidp500_layers[] = {
{ DE_VIDEO1, MALIDP500_DE_LV_BASE, MALIDP500_DE_LV_PTR_BASE,
- MALIDP_DE_LV_STRIDE0, MALIDP500_LV_YUV2RGB, ROTATE_ANY },
+ MALIDP_DE_LV_STRIDE0, MALIDP500_LV_YUV2RGB, ROTATE_ANY,
+ MALIDP500_DE_LV_AD_CTRL },
{ DE_GRAPHICS1, MALIDP500_DE_LG1_BASE, MALIDP500_DE_LG1_PTR_BASE,
- MALIDP_DE_LG_STRIDE, 0, ROTATE_ANY },
+ MALIDP_DE_LG_STRIDE, 0, ROTATE_ANY, MALIDP500_DE_LG1_AD_CTRL },
{ DE_GRAPHICS2, MALIDP500_DE_LG2_BASE, MALIDP500_DE_LG2_PTR_BASE,
- MALIDP_DE_LG_STRIDE, 0, ROTATE_ANY },
+ MALIDP_DE_LG_STRIDE, 0, ROTATE_ANY, MALIDP500_DE_LG2_AD_CTRL },
};

static const struct malidp_layer malidp550_layers[] = {
{ DE_VIDEO1, MALIDP550_DE_LV1_BASE, MALIDP550_DE_LV1_PTR_BASE,
- MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, ROTATE_ANY },
+ MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, ROTATE_ANY,
+ MALIDP550_DE_LV1_AD_CTRL },
{ DE_GRAPHICS1, MALIDP550_DE_LG_BASE, MALIDP550_DE_LG_PTR_BASE,
- MALIDP_DE_LG_STRIDE, 0, ROTATE_ANY },
+ MALIDP_DE_LG_STRIDE, 0, ROTATE_ANY, MALIDP550_DE_LG_AD_CTRL },
{ DE_VIDEO2, MALIDP550_DE_LV2_BASE, MALIDP550_DE_LV2_PTR_BASE,
- MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, ROTATE_ANY },
+ MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, ROTATE_ANY,
+ MALIDP550_DE_LV2_AD_CTRL },
{ DE_SMART, MALIDP550_DE_LS_BASE, MALIDP550_DE_LS_PTR_BASE,
- MALIDP550_DE_LS_R1_STRIDE, 0, ROTATE_NONE },
+ MALIDP550_DE_LS_R1_STRIDE, 0, ROTATE_NONE, 0 },
};

static const struct malidp_layer malidp650_layers[] = {
{ DE_VIDEO1, MALIDP550_DE_LV1_BASE, MALIDP550_DE_LV1_PTR_BASE,
- MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, ROTATE_ANY },
+ MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, ROTATE_ANY,
+ MALIDP550_DE_LV1_AD_CTRL },
{ DE_GRAPHICS1, MALIDP550_DE_LG_BASE, MALIDP550_DE_LG_PTR_BASE,
- MALIDP_DE_LG_STRIDE, 0, ROTATE_COMPRESSED },
+ MALIDP_DE_LG_STRIDE, 0, ROTATE_COMPRESSED, MALIDP550_DE_LG_AD_CTRL },
{ DE_VIDEO2, MALIDP550_DE_LV2_BASE, MALIDP550_DE_LV2_PTR_BASE,
- MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, ROTATE_ANY },
+ MALIDP_DE_LV_STRIDE0, MALIDP550_LV_YUV2RGB, ROTATE_ANY,
+ MALIDP550_DE_LV2_AD_CTRL },
{ DE_SMART, MALIDP550_DE_LS_BASE, MALIDP550_DE_LS_PTR_BASE,
- MALIDP550_DE_LS_R1_STRIDE, 0, ROTATE_NONE },
+ MALIDP550_DE_LS_R1_STRIDE, 0, ROTATE_NONE, 0 },
};

#define SE_N_SCALING_COEFFS 96
diff --git a/drivers/gpu/drm/arm/malidp_hw.h b/drivers/gpu/drm/arm/malidp_hw.h
index 4390243..bbe6883 100644
--- a/drivers/gpu/drm/arm/malidp_hw.h
+++ b/drivers/gpu/drm/arm/malidp_hw.h
@@ -67,6 +67,8 @@ struct malidp_layer {
u16 stride_offset; /* offset to the first stride register. */
s16 yuv2rgb_offset; /* offset to the YUV->RGB matrix entries */
enum rotation_features rot; /* type of rotation supported */
+ /* address offset for the AFBC decoder registers */
+ u16 afbc_decoder_offset;
};

enum malidp_scaling_coeff_set {
diff --git a/drivers/gpu/drm/arm/malidp_planes.c b/drivers/gpu/drm/arm/malidp_planes.c
index 533cdde..3950504 100644
--- a/drivers/gpu/drm/arm/malidp_planes.c
+++ b/drivers/gpu/drm/arm/malidp_planes.c
@@ -330,6 +330,71 @@ static void malidp_de_set_color_encoding(struct malidp_plane *plane,
}
}

+static void malidp_set_plane_base_addr(struct drm_framebuffer *fb,
+ struct malidp_plane *mp,
+ int plane_index)
+{
+ dma_addr_t paddr;
+ u16 ptr;
+ struct drm_plane *plane = &mp->base;
+ bool afbc = fb->modifier ? true : false;
+
+ ptr = mp->layer->ptr + (plane_index << 4);
+
+ /*
+ * For AFBC buffers, cropping is handled by AFBC decoder rather than
+ * pointer manipulation.
+ */
+ if (!afbc) {
+ paddr = drm_fb_cma_get_gem_addr(fb, plane->state,
+ plane_index);
+ } else {
+ struct drm_gem_cma_object *obj;
+
+ obj = drm_fb_cma_get_gem_obj(fb, plane_index);
+
+ if (WARN_ON(!obj))
+ return;
+ paddr = obj->paddr;
+ }
+
+ malidp_hw_write(mp->hwdev, lower_32_bits(paddr), ptr);
+ malidp_hw_write(mp->hwdev, upper_32_bits(paddr), ptr + 4);
+}
+
+static void malidp_de_set_plane_afbc(struct drm_plane *plane)
+{
+ struct malidp_plane *mp;
+ u32 src_w, src_h, val = 0, src_x, src_y;
+ struct drm_framebuffer *fb = plane->state->fb;
+
+ mp = to_malidp_plane(plane);
+
+ /* convert src values from Q16 fixed point to integer */
+ src_w = plane->state->src_w >> 16;
+ src_h = plane->state->src_h >> 16;
+ src_x = plane->state->src_x >> 16;
+ src_y = plane->state->src_y >> 16;
+
+ val = ((fb->width - (src_x + src_w)) << MALIDP_AD_CROP_RIGHT_OFFSET) |
+ src_x;
+ malidp_hw_write(mp->hwdev, val,
+ mp->layer->afbc_decoder_offset + MALIDP_AD_CROP_H);
+
+ val = ((fb->height - (src_y + src_h)) << MALIDP_AD_CROP_BOTTOM_OFFSET) |
+ src_y;
+ malidp_hw_write(mp->hwdev, val,
+ mp->layer->afbc_decoder_offset + MALIDP_AD_CROP_V);
+
+ val = MALIDP_AD_EN;
+ if (fb->modifier & AFBC_FORMAT_MOD_SPLIT)
+ val |= MALIDP_AD_BS;
+ if (fb->modifier & AFBC_FORMAT_MOD_YTR)
+ val |= MALIDP_AD_YTR;
+
+ malidp_hw_write(mp->hwdev, val, mp->layer->afbc_decoder_offset);
+}
+
static void malidp_de_plane_update(struct drm_plane *plane,
struct drm_plane_state *old_state)
{
@@ -338,6 +403,7 @@ static void malidp_de_plane_update(struct drm_plane *plane,
u32 src_w, src_h, dest_w, dest_h, val;
int i;
bool format_has_alpha = plane->state->fb->format->has_alpha;
+ struct drm_framebuffer *fb = plane->state->fb;

mp = to_malidp_plane(plane);

@@ -349,15 +415,9 @@ static void malidp_de_plane_update(struct drm_plane *plane,

malidp_hw_write(mp->hwdev, ms->format, mp->layer->base);

- for (i = 0; i < ms->n_planes; i++) {
- /* calculate the offset for the layer's plane registers */
- u16 ptr = mp->layer->ptr + (i << 4);
- dma_addr_t fb_addr = drm_fb_cma_get_gem_addr(plane->state->fb,
- plane->state, i);
+ for (i = 0; i < ms->n_planes; i++)
+ malidp_set_plane_base_addr(fb, mp, i);

- malidp_hw_write(mp->hwdev, lower_32_bits(fb_addr), ptr);
- malidp_hw_write(mp->hwdev, upper_32_bits(fb_addr), ptr + 4);
- }
malidp_de_set_plane_pitches(mp, ms->n_planes,
plane->state->fb->pitches);

@@ -381,6 +441,11 @@ static void malidp_de_plane_update(struct drm_plane *plane,
LAYER_H_VAL(src_w) | LAYER_V_VAL(src_h),
mp->layer->base + MALIDP550_LS_R1_IN_SIZE);

+ if (fb->modifier)
+ malidp_de_set_plane_afbc(plane);
+ else
+ malidp_hw_write(mp->hwdev, 0, mp->layer->afbc_decoder_offset);
+
/* first clear the rotation bits */
val = malidp_hw_read(mp->hwdev, mp->layer->base + MALIDP_LAYER_CONTROL);
val &= ~LAYER_ROT_MASK;
diff --git a/drivers/gpu/drm/arm/malidp_regs.h b/drivers/gpu/drm/arm/malidp_regs.h
index 149024f..54f4ec5 100644
--- a/drivers/gpu/drm/arm/malidp_regs.h
+++ b/drivers/gpu/drm/arm/malidp_regs.h
@@ -180,10 +180,13 @@
#define MALIDP500_LV_YUV2RGB ((s16)(-0xB8))
#define MALIDP500_DE_LV_BASE 0x00100
#define MALIDP500_DE_LV_PTR_BASE 0x00124
+#define MALIDP500_DE_LV_AD_CTRL 0x00400
#define MALIDP500_DE_LG1_BASE 0x00200
#define MALIDP500_DE_LG1_PTR_BASE 0x0021c
+#define MALIDP500_DE_LG1_AD_CTRL 0x0040c
#define MALIDP500_DE_LG2_BASE 0x00300
#define MALIDP500_DE_LG2_PTR_BASE 0x0031c
+#define MALIDP500_DE_LG2_AD_CTRL 0x00418
#define MALIDP500_SE_BASE 0x00c00
#define MALIDP500_SE_CONTROL 0x00c0c
#define MALIDP500_SE_PTR_BASE 0x00e0c
@@ -208,10 +211,13 @@
#define MALIDP550_LV_YUV2RGB 0x00084
#define MALIDP550_DE_LV1_BASE 0x00100
#define MALIDP550_DE_LV1_PTR_BASE 0x00124
+#define MALIDP550_DE_LV1_AD_CTRL 0x001B8
#define MALIDP550_DE_LV2_BASE 0x00200
#define MALIDP550_DE_LV2_PTR_BASE 0x00224
+#define MALIDP550_DE_LV2_AD_CTRL 0x002B8
#define MALIDP550_DE_LG_BASE 0x00300
#define MALIDP550_DE_LG_PTR_BASE 0x0031c
+#define MALIDP550_DE_LG_AD_CTRL 0x00330
#define MALIDP550_DE_LS_BASE 0x00400
#define MALIDP550_DE_LS_PTR_BASE 0x0042c
#define MALIDP550_DE_PERF_BASE 0x00500
@@ -223,6 +229,20 @@
#define MALIDP550_CONFIG_VALID 0x0c014
#define MALIDP550_CONFIG_ID 0x0ffd4

+/* AFBC register offsets relative to MALIDPXXX_DE_LX_AD_CTRL */
+/* The following register offsets are common for DP500, DP550 and DP650 */
+#define MALIDP_AD_CROP_H 0x4
+#define MALIDP_AD_CROP_V 0x8
+#define MALIDP_AD_END_PTR_LOW 0xc
+#define MALIDP_AD_END_PTR_HIGH 0x10
+
+/* AFBC decoder Registers */
+#define MALIDP_AD_EN BIT(0)
+#define MALIDP_AD_YTR BIT(4)
+#define MALIDP_AD_BS BIT(8)
+#define MALIDP_AD_CROP_RIGHT_OFFSET 16
+#define MALIDP_AD_CROP_BOTTOM_OFFSET 16
+
/*
* Starting with DP550 the register map blocks has been standardised to the
* following layout:
--
2.7.4

Next message: Boris Brezillon: "Re: [PATCH 03/11] spi: Add a driver for the Freescale/NXP QuadSPI controller"
Previous message: Ayan Kumar Halder: "[RFC PATCH 2/4] drm/arm/malidp: Implemented the size validation for AFBC framebuffers"
In reply to: Ayan Kumar Halder: "[RFC PATCH 2/4] drm/arm/malidp: Implemented the size validation for AFBC framebuffers"
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