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Subject[PATCH v3 2/2] drm/malidp: Enable writeback scaling
Date
The phase setting part of malidp_crtc_atomic_check_scaling is refactored
to allow use in writeback scaling.

Also the enable_memwrite function prototype is simplified by directly
passing mw_state.

Signed-off-by: Ben Davis <ben.davis@arm.com>
---
drivers/gpu/drm/arm/malidp_crtc.c | 49 +++++++++++---------
drivers/gpu/drm/arm/malidp_crtc.h | 12 +++++
drivers/gpu/drm/arm/malidp_drv.c | 10 +++--
drivers/gpu/drm/arm/malidp_hw.c | 45 +++++++++++++------
drivers/gpu/drm/arm/malidp_hw.h | 19 ++++++--
drivers/gpu/drm/arm/malidp_mw.c | 94 ++++++++++++++++++++++++++++++---------
drivers/gpu/drm/arm/malidp_regs.h | 1 +
7 files changed, 168 insertions(+), 62 deletions(-)
create mode 100644 drivers/gpu/drm/arm/malidp_crtc.h

diff --git a/drivers/gpu/drm/arm/malidp_crtc.c b/drivers/gpu/drm/arm/malidp_crtc.c
index 3f65996..aa66457 100644
--- a/drivers/gpu/drm/arm/malidp_crtc.c
+++ b/drivers/gpu/drm/arm/malidp_crtc.c
@@ -265,6 +265,31 @@ static int malidp_crtc_atomic_check_ctm(struct drm_crtc *crtc,
return 0;
}

+void malidp_set_se_config_phase(struct malidp_se_config *s)
+{
+#define SE_N_PHASE 4
+#define SE_SHIFT_N_PHASE 12
+ u32 phase;
+
+ /* Calculate initial_phase and delta_phase for horizontal. */
+ phase = s->input_w;
+ s->h_init_phase = ((phase << SE_N_PHASE) / s->output_w + 1) / 2;
+
+ phase = s->input_w;
+ phase <<= (SE_SHIFT_N_PHASE + SE_N_PHASE);
+ s->h_delta_phase = phase / s->output_w;
+
+ /* Same for vertical. */
+ phase = s->input_h;
+ s->v_init_phase = ((phase << SE_N_PHASE) / s->output_h + 1) / 2;
+
+ phase = s->input_h;
+ phase <<= (SE_SHIFT_N_PHASE + SE_N_PHASE);
+ s->v_delta_phase = phase / s->output_h;
+#undef SE_N_PHASE
+#undef SE_SHIFT_N_PHASE
+}
+
static int malidp_crtc_atomic_check_scaling(struct drm_crtc *crtc,
struct drm_crtc_state *state)
{
@@ -291,7 +316,6 @@ static int malidp_crtc_atomic_check_scaling(struct drm_crtc *crtc,

drm_atomic_crtc_state_for_each_plane_state(plane, pstate, state) {
struct malidp_plane *mp = to_malidp_plane(plane);
- u32 phase;

if (!(mp->layer->id & scaling))
continue;
@@ -319,27 +343,8 @@ static int malidp_crtc_atomic_check_scaling(struct drm_crtc *crtc,
s->output_w = pstate->crtc_w;
s->output_h = pstate->crtc_h;

-#define SE_N_PHASE 4
-#define SE_SHIFT_N_PHASE 12
- /* Calculate initial_phase and delta_phase for horizontal. */
- phase = s->input_w;
- s->h_init_phase =
- ((phase << SE_N_PHASE) / s->output_w + 1) / 2;
-
- phase = s->input_w;
- phase <<= (SE_SHIFT_N_PHASE + SE_N_PHASE);
- s->h_delta_phase = phase / s->output_w;
-
- /* Same for vertical. */
- phase = s->input_h;
- s->v_init_phase =
- ((phase << SE_N_PHASE) / s->output_h + 1) / 2;
-
- phase = s->input_h;
- phase <<= (SE_SHIFT_N_PHASE + SE_N_PHASE);
- s->v_delta_phase = phase / s->output_h;
-#undef SE_N_PHASE
-#undef SE_SHIFT_N_PHASE
+
+ malidp_set_se_config_phase(s);
s->plane_src_id = mp->layer->id;
}

diff --git a/drivers/gpu/drm/arm/malidp_crtc.h b/drivers/gpu/drm/arm/malidp_crtc.h
new file mode 100644
index 0000000..0f056f8
--- /dev/null
+++ b/drivers/gpu/drm/arm/malidp_crtc.h
@@ -0,0 +1,12 @@
+/* SPDX-License-Identifier: GPL-2.0 */
+/*
+ * (C) COPYRIGHT 2019 ARM Limited. All rights reserved.
+ *
+ */
+
+#include "malidp_hw.h"
+
+#ifndef __MALIDP_CRTC_H__
+#define __MALIDP_CRTC_H__
+void malidp_set_se_config_phase(struct malidp_se_config *s);
+#endif
diff --git a/drivers/gpu/drm/arm/malidp_drv.c b/drivers/gpu/drm/arm/malidp_drv.c
index d37ff9d..e2465e9 100644
--- a/drivers/gpu/drm/arm/malidp_drv.c
+++ b/drivers/gpu/drm/arm/malidp_drv.c
@@ -138,7 +138,7 @@ static void malidp_atomic_commit_se_config(struct drm_crtc *crtc,
u32 val;

/* Set SE_CONTROL */
- if (!s->scale_enable) {
+ if (!s->scale_enable && !s->wb_scale_enable) {
val = malidp_hw_read(hwdev, se_control);
val &= ~MALIDP_SE_SCALING_EN;
malidp_hw_write(hwdev, val, se_control);
@@ -147,12 +147,16 @@ static void malidp_atomic_commit_se_config(struct drm_crtc *crtc,

hwdev->hw->se_set_scaling_coeffs(hwdev, s, old_s);
val = malidp_hw_read(hwdev, se_control);
- val |= MALIDP_SE_SCALING_EN | MALIDP_SE_ALPHA_EN;
+ val |= MALIDP_SE_SCALING_EN;

val &= ~MALIDP_SE_ENH(MALIDP_SE_ENH_MASK);
val |= s->enhancer_enable ? MALIDP_SE_ENH(3) : 0;

- val |= MALIDP_SE_RGBO_IF_EN;
+ if (s->scale_enable)
+ val |= (MALIDP_SE_RGBO_IF_EN | MALIDP_SE_ALPHA_EN);
+ else
+ val &= ~((MALIDP_SE_RGBO_IF_EN | MALIDP_SE_ALPHA_EN));
+
malidp_hw_write(hwdev, val, se_control);

/* Set IN_SIZE & OUT_SIZE. */
diff --git a/drivers/gpu/drm/arm/malidp_hw.c b/drivers/gpu/drm/arm/malidp_hw.c
index 1a36718..6f59c0e 100644
--- a/drivers/gpu/drm/arm/malidp_hw.c
+++ b/drivers/gpu/drm/arm/malidp_hw.c
@@ -497,13 +497,18 @@ static long malidp500_se_calc_mclk(struct malidp_hw_device *hwdev,
return ret;
}

-static int malidp500_enable_memwrite(struct malidp_hw_device *hwdev,
- dma_addr_t *addrs, s32 *pitches,
- int num_planes, u16 w, u16 h, u32 fmt_id,
- const s16 *rgb2yuv_coeffs)
+static int malidp500_enable_memwrite(struct malidp_hw_device *hwdev, u16 w, u16 h,
+ struct malidp_mw_connector_state *mw_state)
{
+
+ int num_planes = mw_state->n_planes;
+ dma_addr_t *addrs = mw_state->addrs;
+ s32 *pitches = mw_state->pitches;
+ u32 fmt_id = mw_state->format;
u32 base = MALIDP500_SE_MEMWRITE_BASE;
u32 de_base = malidp_get_block_base(hwdev, MALIDP_DE_BLOCK);
+ const s16 *rgb2yuv_coeffs = !mw_state->rgb2yuv_initialized ?
+ mw_state->rgb2yuv_coeffs : NULL;

/* enable the scaling engine block */
malidp_hw_setbits(hwdev, MALIDP_SCALE_ENGINE_EN, de_base + MALIDP_DE_DISPLAY_FUNC);
@@ -847,13 +852,18 @@ static long malidp550_se_calc_mclk(struct malidp_hw_device *hwdev,
return ret;
}

-static int malidp550_enable_memwrite(struct malidp_hw_device *hwdev,
- dma_addr_t *addrs, s32 *pitches,
- int num_planes, u16 w, u16 h, u32 fmt_id,
- const s16 *rgb2yuv_coeffs)
+static int malidp550_enable_memwrite(struct malidp_hw_device *hwdev, u16 w, u16 h,
+ struct malidp_mw_connector_state *mw_state)
{
+ int num_planes = mw_state->n_planes;
+ bool scaling = mw_state->wb_scale_enable;
+ dma_addr_t *addrs = mw_state->addrs;
+ s32 *pitches = mw_state->pitches;
+ u32 fmt_id = mw_state->format;
u32 base = MALIDP550_SE_MEMWRITE_BASE;
u32 de_base = malidp_get_block_base(hwdev, MALIDP_DE_BLOCK);
+ const s16 *rgb2yuv_coeffs = !mw_state->rgb2yuv_initialized ?
+ mw_state->rgb2yuv_coeffs : NULL;

/* enable the scaling engine block */
malidp_hw_setbits(hwdev, MALIDP_SCALE_ENGINE_EN, de_base + MALIDP_DE_DISPLAY_FUNC);
@@ -876,10 +886,18 @@ static int malidp550_enable_memwrite(struct malidp_hw_device *hwdev,
WARN(1, "Invalid number of planes");
}

- malidp_hw_write(hwdev, MALIDP_DE_H_ACTIVE(w) | MALIDP_DE_V_ACTIVE(h),
- MALIDP550_SE_MEMWRITE_OUT_SIZE);
- malidp_hw_setbits(hwdev, MALIDP550_SE_MEMWRITE_ONESHOT | MALIDP_SE_MEMWRITE_EN,
- MALIDP550_SE_CONTROL);
+ malidp_hw_clearbits(hwdev, MALIDP_SE_MEMWRITE_EN | MALIDP_SE_MEMWRITE_SCL_EN,
+ MALIDP550_SE_CONTROL);
+
+ if (scaling) {
+ malidp_hw_setbits(hwdev, MALIDP550_SE_MEMWRITE_ONESHOT | MALIDP_SE_MEMWRITE_SCL_EN,
+ MALIDP550_SE_CONTROL);
+ } else {
+ malidp_hw_write(hwdev, MALIDP_DE_H_ACTIVE(w) | MALIDP_DE_V_ACTIVE(h),
+ MALIDP550_SE_MEMWRITE_OUT_SIZE);
+ malidp_hw_setbits(hwdev, MALIDP550_SE_MEMWRITE_ONESHOT | MALIDP_SE_MEMWRITE_EN,
+ MALIDP550_SE_CONTROL);
+ }

if (rgb2yuv_coeffs) {
int i;
@@ -897,7 +915,8 @@ static void malidp550_disable_memwrite(struct malidp_hw_device *hwdev)
{
u32 base = malidp_get_block_base(hwdev, MALIDP_DE_BLOCK);

- malidp_hw_clearbits(hwdev, MALIDP550_SE_MEMWRITE_ONESHOT | MALIDP_SE_MEMWRITE_EN,
+ malidp_hw_clearbits(hwdev,
+ MALIDP550_SE_MEMWRITE_ONESHOT | MALIDP_SE_MEMWRITE_EN | MALIDP_SE_MEMWRITE_SCL_EN,
MALIDP550_SE_CONTROL);
malidp_hw_clearbits(hwdev, MALIDP_SCALE_ENGINE_EN, base + MALIDP_DE_DISPLAY_FUNC);
}
diff --git a/drivers/gpu/drm/arm/malidp_hw.h b/drivers/gpu/drm/arm/malidp_hw.h
index 8352a2e..61ddcb5 100644
--- a/drivers/gpu/drm/arm/malidp_hw.h
+++ b/drivers/gpu/drm/arm/malidp_hw.h
@@ -85,6 +85,7 @@ enum malidp_scaling_coeff_set {
struct malidp_se_config {
u8 scale_enable : 1;
u8 enhancer_enable : 1;
+ u8 wb_scale_enable : 1;
u8 hcoeff : 3;
u8 vcoeff : 3;
u8 plane_src_id;
@@ -94,6 +95,19 @@ struct malidp_se_config {
u32 v_init_phase, v_delta_phase;
};

+#define to_mw_state(_state) (struct malidp_mw_connector_state *)(_state)
+
+struct malidp_mw_connector_state {
+ struct drm_connector_state base;
+ dma_addr_t addrs[2];
+ s32 pitches[2];
+ u8 format;
+ u8 n_planes;
+ bool rgb2yuv_initialized;
+ const s16 *rgb2yuv_coeffs;
+ bool wb_scale_enable;
+};
+
/* regmap features */
#define MALIDP_REGMAP_HAS_CLEARIRQ BIT(0)
#define MALIDP_DEVICE_AFBC_SUPPORT_SPLIT BIT(1)
@@ -206,9 +220,8 @@ struct malidp_hw {
* @param h - height of the output frame
* @param fmt_id - internal format ID of output buffer
*/
- int (*enable_memwrite)(struct malidp_hw_device *hwdev, dma_addr_t *addrs,
- s32 *pitches, int num_planes, u16 w, u16 h, u32 fmt_id,
- const s16 *rgb2yuv_coeffs);
+ int (*enable_memwrite)(struct malidp_hw_device *hwdev, u16 w, u16 h,
+ struct malidp_mw_connector_state *mw_state);

/*
* Disable the writing to memory of the next frame's content.
diff --git a/drivers/gpu/drm/arm/malidp_mw.c b/drivers/gpu/drm/arm/malidp_mw.c
index 2865f7a..1e1f47c 100644
--- a/drivers/gpu/drm/arm/malidp_mw.c
+++ b/drivers/gpu/drm/arm/malidp_mw.c
@@ -13,23 +13,13 @@
#include <drm/drm_gem_cma_helper.h>
#include <drm/drmP.h>
#include <drm/drm_writeback.h>
+#include <video/videomode.h>

+#include "malidp_crtc.h"
#include "malidp_drv.h"
#include "malidp_hw.h"
#include "malidp_mw.h"

-#define to_mw_state(_state) (struct malidp_mw_connector_state *)(_state)
-
-struct malidp_mw_connector_state {
- struct drm_connector_state base;
- dma_addr_t addrs[2];
- s32 pitches[2];
- u8 format;
- u8 n_planes;
- bool rgb2yuv_initialized;
- const s16 *rgb2yuv_coeffs;
-};
-
static int malidp_mw_connector_get_modes(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
@@ -126,16 +116,82 @@ malidp_mw_encoder_atomic_check(struct drm_encoder *encoder,
struct drm_connector_state *conn_state)
{
struct malidp_mw_connector_state *mw_state = to_mw_state(conn_state);
+ struct malidp_crtc_state *cs = to_malidp_crtc_state(crtc_state);
+ struct malidp_se_config *s = &cs->scaler_config;
struct malidp_drm *malidp = encoder->dev->dev_private;
struct drm_framebuffer *fb;
- int i, n_planes;
+ int i, n_planes, ret;
+ struct malidp_hw_device *hwdev = malidp->dev;
+ struct videomode vm;
+ u32 h_upscale_factor = 0; /* U16.16 */
+ u32 v_upscale_factor = 0; /* U16.16 */
+
+ s->wb_scale_enable = 0;

if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
return 0;

+
+ /* 0s are the default for writeback_dest_w,h - so don't scale.
+ * The case where one of w,h is set but the other is 0 is meaningless
+ * so ignore it
+ */
+ if (conn_state->writeback_dest_w && conn_state->writeback_dest_h) {
+ if ((conn_state->writeback_dest_w != crtc_state->mode.hdisplay) ||
+ (conn_state->writeback_dest_h != crtc_state->mode.vdisplay)) {
+ s->wb_scale_enable = 1;
+ mw_state->wb_scale_enable = true;
+ }
+ }
+
fb = conn_state->writeback_job->fb;
- if ((fb->width != crtc_state->mode.hdisplay) ||
- (fb->height != crtc_state->mode.vdisplay)) {
+ if (s->wb_scale_enable) {
+ if (s->scale_enable) {
+ DRM_DEBUG_KMS("Attempting to scale on writeback while scaling a layer\n");
+ return -EINVAL;
+ }
+
+ s->input_w = crtc_state->mode.hdisplay;
+ s->input_h = crtc_state->mode.vdisplay;
+ s->output_w = conn_state->writeback_dest_w;
+ s->output_h = conn_state->writeback_dest_h;
+
+ if (fb->width < s->output_w || fb->height < s->output_h) {
+ DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n",
+ fb->width, fb->height);
+ return -EINVAL;
+ }
+
+ if ((s->output_w > s->input_w) || (s->output_h > s->input_h)) {
+ DRM_DEBUG_KMS("Upscaling on writeback is not supported\n");
+ return -EINVAL;
+ }
+
+ /*
+ * Convert crtc_[w|h] to U32.32, then divide by U16.16 src_[w|h]
+ * to get the U16.16 result.
+ */
+ h_upscale_factor = div_u64((u64)s->output_w << 32,
+ (u32)s->input_w << 16);
+ v_upscale_factor = div_u64((u64)s->output_h << 32,
+ (u32)s->input_h << 16);
+
+ /* enhancer is for upscaling */
+ s->enhancer_enable = 0;
+
+ malidp_set_se_config_phase(s);
+
+ s->hcoeff = malidp_se_select_coeffs(h_upscale_factor);
+ s->vcoeff = malidp_se_select_coeffs(v_upscale_factor);
+
+ drm_display_mode_to_videomode(&crtc_state->adjusted_mode, &vm);
+ ret = hwdev->hw->se_calc_mclk(hwdev, s, &vm);
+ if (ret < 0)
+ return -EINVAL;
+ }
+
+ if (!s->wb_scale_enable && ((fb->width != crtc_state->mode.hdisplay) ||
+ (fb->height != crtc_state->mode.vdisplay))) {
DRM_DEBUG_KMS("Invalid framebuffer size %ux%u\n",
fb->width, fb->height);
return -EINVAL;
@@ -252,18 +308,14 @@ void malidp_mw_atomic_commit(struct drm_device *drm,

DRM_DEV_DEBUG_DRIVER(drm->dev,
"Enable memwrite %ux%u:%d %pad fmt: %u\n",
- fb->width, fb->height,
+ conn_state->writeback_dest_w, conn_state->writeback_dest_h,
mw_state->pitches[0],
&mw_state->addrs[0],
mw_state->format);

drm_writeback_queue_job(mw_conn, conn_state->writeback_job);
conn_state->writeback_job = NULL;
- hwdev->hw->enable_memwrite(hwdev, mw_state->addrs,
- mw_state->pitches, mw_state->n_planes,
- fb->width, fb->height, mw_state->format,
- !mw_state->rgb2yuv_initialized ?
- mw_state->rgb2yuv_coeffs : NULL);
+ hwdev->hw->enable_memwrite(hwdev, fb->width, fb->height, mw_state);
mw_state->rgb2yuv_initialized = !!mw_state->rgb2yuv_coeffs;
} else {
DRM_DEV_DEBUG_DRIVER(drm->dev, "Disable memwrite\n");
diff --git a/drivers/gpu/drm/arm/malidp_regs.h b/drivers/gpu/drm/arm/malidp_regs.h
index a3363f3..254aa98 100644
--- a/drivers/gpu/drm/arm/malidp_regs.h
+++ b/drivers/gpu/drm/arm/malidp_regs.h
@@ -73,6 +73,7 @@
#define MALIDP_DISP_FUNC_CADJ (1 << 4)
#define MALIDP_DISP_FUNC_ILACED (1 << 8)
#define MALIDP_SCALE_ENGINE_EN (1 << 16)
+#define MALIDP_SE_MEMWRITE_SCL_EN (1 << 5)
#define MALIDP_SE_MEMWRITE_EN (2 << 5)

/* register offsets for IRQ management */
--
2.7.4
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