Commit 008095e0 authored by Boris Brezillon's avatar Boris Brezillon Committed by Boris Brezillon

drm/vc4: Add support for the transposer block

The transposer block is providing support for mem-to-mem composition,
which is exposed as a drm_writeback connector in DRM.

Add a driver to support this feature.
Signed-off-by: default avatarBoris Brezillon <boris.brezillon@free-electrons.com>
Reviewed-by: default avatarEric Anholt <eric@anholt.net>
Link: https://patchwork.freedesktop.org/patch/msgid/20180703075022.15138-9-boris.brezillon@bootlin.com
parent 1ebe99a7
...@@ -74,6 +74,12 @@ Required properties for DSI: ...@@ -74,6 +74,12 @@ Required properties for DSI:
The 3 clocks output from the DSI analog PHY: dsi[01]_byte, The 3 clocks output from the DSI analog PHY: dsi[01]_byte,
dsi[01]_ddr2, and dsi[01]_ddr dsi[01]_ddr2, and dsi[01]_ddr
Required properties for the TXP (writeback) block:
- compatible: Should be "brcm,bcm2835-txp"
- reg: Physical base address and length of the TXP block's registers
- interrupts: The interrupt number
See bindings/interrupt-controller/brcm,bcm2835-armctrl-ic.txt
[1] Documentation/devicetree/bindings/media/video-interfaces.txt [1] Documentation/devicetree/bindings/media/video-interfaces.txt
Example: Example:
......
...@@ -19,6 +19,7 @@ vc4-y := \ ...@@ -19,6 +19,7 @@ vc4-y := \
vc4_plane.o \ vc4_plane.o \
vc4_render_cl.o \ vc4_render_cl.o \
vc4_trace_points.o \ vc4_trace_points.o \
vc4_txp.o \
vc4_v3d.o \ vc4_v3d.o \
vc4_validate.o \ vc4_validate.o \
vc4_validate_shaders.o vc4_validate_shaders.o
......
...@@ -46,6 +46,8 @@ struct vc4_crtc_state { ...@@ -46,6 +46,8 @@ struct vc4_crtc_state {
struct drm_crtc_state base; struct drm_crtc_state base;
/* Dlist area for this CRTC configuration. */ /* Dlist area for this CRTC configuration. */
struct drm_mm_node mm; struct drm_mm_node mm;
bool feed_txp;
bool txp_armed;
}; };
static inline struct vc4_crtc_state * static inline struct vc4_crtc_state *
...@@ -324,10 +326,8 @@ static struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc) ...@@ -324,10 +326,8 @@ static struct drm_encoder *vc4_get_crtc_encoder(struct drm_crtc *crtc)
return NULL; return NULL;
} }
static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc) static void vc4_crtc_config_pv(struct drm_crtc *crtc)
{ {
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc); struct drm_encoder *encoder = vc4_get_crtc_encoder(crtc);
struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder); struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
...@@ -338,12 +338,6 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc) ...@@ -338,12 +338,6 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
bool is_dsi = (vc4_encoder->type == VC4_ENCODER_TYPE_DSI0 || bool is_dsi = (vc4_encoder->type == VC4_ENCODER_TYPE_DSI0 ||
vc4_encoder->type == VC4_ENCODER_TYPE_DSI1); vc4_encoder->type == VC4_ENCODER_TYPE_DSI1);
u32 format = is_dsi ? PV_CONTROL_FORMAT_DSIV_24 : PV_CONTROL_FORMAT_24; u32 format = is_dsi ? PV_CONTROL_FORMAT_DSIV_24 : PV_CONTROL_FORMAT_24;
bool debug_dump_regs = false;
if (debug_dump_regs) {
DRM_INFO("CRTC %d regs before:\n", drm_crtc_index(crtc));
vc4_crtc_dump_regs(vc4_crtc);
}
/* Reset the PV fifo. */ /* Reset the PV fifo. */
CRTC_WRITE(PV_CONTROL, 0); CRTC_WRITE(PV_CONTROL, 0);
...@@ -419,6 +413,49 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc) ...@@ -419,6 +413,49 @@ static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
PV_CONTROL_CLK_SELECT) | PV_CONTROL_CLK_SELECT) |
PV_CONTROL_FIFO_CLR | PV_CONTROL_FIFO_CLR |
PV_CONTROL_EN); PV_CONTROL_EN);
}
static void vc4_crtc_mode_set_nofb(struct drm_crtc *crtc)
{
struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct vc4_crtc_state *vc4_state = to_vc4_crtc_state(crtc->state);
struct drm_display_mode *mode = &crtc->state->adjusted_mode;
bool interlace = mode->flags & DRM_MODE_FLAG_INTERLACE;
bool debug_dump_regs = false;
if (debug_dump_regs) {
DRM_INFO("CRTC %d regs before:\n", drm_crtc_index(crtc));
vc4_crtc_dump_regs(vc4_crtc);
}
if (vc4_crtc->channel == 2) {
u32 dispctrl;
u32 dsp3_mux;
/*
* SCALER_DISPCTRL_DSP3 = X, where X < 2 means 'connect DSP3 to
* FIFO X'.
* SCALER_DISPCTRL_DSP3 = 3 means 'disable DSP 3'.
*
* DSP3 is connected to FIFO2 unless the transposer is
* enabled. In this case, FIFO 2 is directly accessed by the
* TXP IP, and we need to disable the FIFO2 -> pixelvalve1
* route.
*/
if (vc4_state->feed_txp)
dsp3_mux = VC4_SET_FIELD(3, SCALER_DISPCTRL_DSP3_MUX);
else
dsp3_mux = VC4_SET_FIELD(2, SCALER_DISPCTRL_DSP3_MUX);
dispctrl = HVS_READ(SCALER_DISPCTRL) &
~SCALER_DISPCTRL_DSP3_MUX_MASK;
HVS_WRITE(SCALER_DISPCTRL, dispctrl | dsp3_mux);
}
if (!vc4_state->feed_txp)
vc4_crtc_config_pv(crtc);
HVS_WRITE(SCALER_DISPBKGNDX(vc4_crtc->channel), HVS_WRITE(SCALER_DISPBKGNDX(vc4_crtc->channel),
SCALER_DISPBKGND_AUTOHS | SCALER_DISPBKGND_AUTOHS |
...@@ -499,6 +536,13 @@ static void vc4_crtc_atomic_disable(struct drm_crtc *crtc, ...@@ -499,6 +536,13 @@ static void vc4_crtc_atomic_disable(struct drm_crtc *crtc,
} }
} }
void vc4_crtc_txp_armed(struct drm_crtc_state *state)
{
struct vc4_crtc_state *vc4_state = to_vc4_crtc_state(state);
vc4_state->txp_armed = true;
}
static void vc4_crtc_update_dlist(struct drm_crtc *crtc) static void vc4_crtc_update_dlist(struct drm_crtc *crtc)
{ {
struct drm_device *dev = crtc->dev; struct drm_device *dev = crtc->dev;
...@@ -514,8 +558,11 @@ static void vc4_crtc_update_dlist(struct drm_crtc *crtc) ...@@ -514,8 +558,11 @@ static void vc4_crtc_update_dlist(struct drm_crtc *crtc)
WARN_ON(drm_crtc_vblank_get(crtc) != 0); WARN_ON(drm_crtc_vblank_get(crtc) != 0);
spin_lock_irqsave(&dev->event_lock, flags); spin_lock_irqsave(&dev->event_lock, flags);
vc4_crtc->event = crtc->state->event;
crtc->state->event = NULL; if (!vc4_state->feed_txp || vc4_state->txp_armed) {
vc4_crtc->event = crtc->state->event;
crtc->state->event = NULL;
}
HVS_WRITE(SCALER_DISPLISTX(vc4_crtc->channel), HVS_WRITE(SCALER_DISPLISTX(vc4_crtc->channel),
vc4_state->mm.start); vc4_state->mm.start);
...@@ -533,8 +580,8 @@ static void vc4_crtc_atomic_enable(struct drm_crtc *crtc, ...@@ -533,8 +580,8 @@ static void vc4_crtc_atomic_enable(struct drm_crtc *crtc,
struct drm_device *dev = crtc->dev; struct drm_device *dev = crtc->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev); struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc); struct vc4_crtc *vc4_crtc = to_vc4_crtc(crtc);
struct drm_crtc_state *state = crtc->state; struct vc4_crtc_state *vc4_state = to_vc4_crtc_state(crtc->state);
struct drm_display_mode *mode = &state->adjusted_mode; struct drm_display_mode *mode = &crtc->state->adjusted_mode;
require_hvs_enabled(dev); require_hvs_enabled(dev);
...@@ -546,15 +593,21 @@ static void vc4_crtc_atomic_enable(struct drm_crtc *crtc, ...@@ -546,15 +593,21 @@ static void vc4_crtc_atomic_enable(struct drm_crtc *crtc,
/* Turn on the scaler, which will wait for vstart to start /* Turn on the scaler, which will wait for vstart to start
* compositing. * compositing.
* When feeding the transposer, we should operate in oneshot
* mode.
*/ */
HVS_WRITE(SCALER_DISPCTRLX(vc4_crtc->channel), HVS_WRITE(SCALER_DISPCTRLX(vc4_crtc->channel),
VC4_SET_FIELD(mode->hdisplay, SCALER_DISPCTRLX_WIDTH) | VC4_SET_FIELD(mode->hdisplay, SCALER_DISPCTRLX_WIDTH) |
VC4_SET_FIELD(mode->vdisplay, SCALER_DISPCTRLX_HEIGHT) | VC4_SET_FIELD(mode->vdisplay, SCALER_DISPCTRLX_HEIGHT) |
SCALER_DISPCTRLX_ENABLE); SCALER_DISPCTRLX_ENABLE |
(vc4_state->feed_txp ? SCALER_DISPCTRLX_ONESHOT : 0));
/* Turn on the pixel valve, which will emit the vstart signal. */ /* When feeding the transposer block the pixelvalve is unneeded and
CRTC_WRITE(PV_V_CONTROL, * should not be enabled.
CRTC_READ(PV_V_CONTROL) | PV_VCONTROL_VIDEN); */
if (!vc4_state->feed_txp)
CRTC_WRITE(PV_V_CONTROL,
CRTC_READ(PV_V_CONTROL) | PV_VCONTROL_VIDEN);
} }
static enum drm_mode_status vc4_crtc_mode_valid(struct drm_crtc *crtc, static enum drm_mode_status vc4_crtc_mode_valid(struct drm_crtc *crtc,
...@@ -579,8 +632,10 @@ static int vc4_crtc_atomic_check(struct drm_crtc *crtc, ...@@ -579,8 +632,10 @@ static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
struct drm_plane *plane; struct drm_plane *plane;
unsigned long flags; unsigned long flags;
const struct drm_plane_state *plane_state; const struct drm_plane_state *plane_state;
struct drm_connector *conn;
struct drm_connector_state *conn_state;
u32 dlist_count = 0; u32 dlist_count = 0;
int ret; int ret, i;
/* The pixelvalve can only feed one encoder (and encoders are /* The pixelvalve can only feed one encoder (and encoders are
* 1:1 with connectors.) * 1:1 with connectors.)
...@@ -600,6 +655,24 @@ static int vc4_crtc_atomic_check(struct drm_crtc *crtc, ...@@ -600,6 +655,24 @@ static int vc4_crtc_atomic_check(struct drm_crtc *crtc,
if (ret) if (ret)
return ret; return ret;
for_each_new_connector_in_state(state->state, conn, conn_state, i) {
if (conn_state->crtc != crtc)
continue;
/* The writeback connector is implemented using the transposer
* block which is directly taking its data from the HVS FIFO.
*/
if (conn->connector_type == DRM_MODE_CONNECTOR_WRITEBACK) {
state->no_vblank = true;
vc4_state->feed_txp = true;
} else {
state->no_vblank = false;
vc4_state->feed_txp = false;
}
break;
}
return 0; return 0;
} }
...@@ -713,7 +786,8 @@ static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc) ...@@ -713,7 +786,8 @@ static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc)
spin_lock_irqsave(&dev->event_lock, flags); spin_lock_irqsave(&dev->event_lock, flags);
if (vc4_crtc->event && if (vc4_crtc->event &&
(vc4_state->mm.start == HVS_READ(SCALER_DISPLACTX(chan)))) { (vc4_state->mm.start == HVS_READ(SCALER_DISPLACTX(chan)) ||
vc4_state->feed_txp)) {
drm_crtc_send_vblank_event(crtc, vc4_crtc->event); drm_crtc_send_vblank_event(crtc, vc4_crtc->event);
vc4_crtc->event = NULL; vc4_crtc->event = NULL;
drm_crtc_vblank_put(crtc); drm_crtc_vblank_put(crtc);
...@@ -721,6 +795,13 @@ static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc) ...@@ -721,6 +795,13 @@ static void vc4_crtc_handle_page_flip(struct vc4_crtc *vc4_crtc)
spin_unlock_irqrestore(&dev->event_lock, flags); spin_unlock_irqrestore(&dev->event_lock, flags);
} }
void vc4_crtc_handle_vblank(struct vc4_crtc *crtc)
{
crtc->t_vblank = ktime_get();
drm_crtc_handle_vblank(&crtc->base);
vc4_crtc_handle_page_flip(crtc);
}
static irqreturn_t vc4_crtc_irq_handler(int irq, void *data) static irqreturn_t vc4_crtc_irq_handler(int irq, void *data)
{ {
struct vc4_crtc *vc4_crtc = data; struct vc4_crtc *vc4_crtc = data;
...@@ -728,10 +809,8 @@ static irqreturn_t vc4_crtc_irq_handler(int irq, void *data) ...@@ -728,10 +809,8 @@ static irqreturn_t vc4_crtc_irq_handler(int irq, void *data)
irqreturn_t ret = IRQ_NONE; irqreturn_t ret = IRQ_NONE;
if (stat & PV_INT_VFP_START) { if (stat & PV_INT_VFP_START) {
vc4_crtc->t_vblank = ktime_get();
CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START); CRTC_WRITE(PV_INTSTAT, PV_INT_VFP_START);
drm_crtc_handle_vblank(&vc4_crtc->base); vc4_crtc_handle_vblank(vc4_crtc);
vc4_crtc_handle_page_flip(vc4_crtc);
ret = IRQ_HANDLED; ret = IRQ_HANDLED;
} }
...@@ -884,12 +963,15 @@ static int vc4_page_flip(struct drm_crtc *crtc, ...@@ -884,12 +963,15 @@ static int vc4_page_flip(struct drm_crtc *crtc,
static struct drm_crtc_state *vc4_crtc_duplicate_state(struct drm_crtc *crtc) static struct drm_crtc_state *vc4_crtc_duplicate_state(struct drm_crtc *crtc)
{ {
struct vc4_crtc_state *vc4_state; struct vc4_crtc_state *vc4_state, *old_vc4_state;
vc4_state = kzalloc(sizeof(*vc4_state), GFP_KERNEL); vc4_state = kzalloc(sizeof(*vc4_state), GFP_KERNEL);
if (!vc4_state) if (!vc4_state)
return NULL; return NULL;
old_vc4_state = to_vc4_crtc_state(crtc->state);
vc4_state->feed_txp = old_vc4_state->feed_txp;
__drm_atomic_helper_crtc_duplicate_state(crtc, &vc4_state->base); __drm_atomic_helper_crtc_duplicate_state(crtc, &vc4_state->base);
return &vc4_state->base; return &vc4_state->base;
} }
...@@ -987,9 +1069,17 @@ static void vc4_set_crtc_possible_masks(struct drm_device *drm, ...@@ -987,9 +1069,17 @@ static void vc4_set_crtc_possible_masks(struct drm_device *drm,
struct drm_encoder *encoder; struct drm_encoder *encoder;
drm_for_each_encoder(encoder, drm) { drm_for_each_encoder(encoder, drm) {
struct vc4_encoder *vc4_encoder = to_vc4_encoder(encoder); struct vc4_encoder *vc4_encoder;
int i; int i;
/* HVS FIFO2 can feed the TXP IP. */
if (crtc_data->hvs_channel == 2 &&
encoder->encoder_type == DRM_MODE_ENCODER_VIRTUAL) {
encoder->possible_crtcs |= drm_crtc_mask(crtc);
continue;
}
vc4_encoder = to_vc4_encoder(encoder);
for (i = 0; i < ARRAY_SIZE(crtc_data->encoder_types); i++) { for (i = 0; i < ARRAY_SIZE(crtc_data->encoder_types); i++) {
if (vc4_encoder->type == encoder_types[i]) { if (vc4_encoder->type == encoder_types[i]) {
vc4_encoder->clock_select = i; vc4_encoder->clock_select = i;
......
...@@ -21,6 +21,7 @@ static const struct drm_info_list vc4_debugfs_list[] = { ...@@ -21,6 +21,7 @@ static const struct drm_info_list vc4_debugfs_list[] = {
{"dsi1_regs", vc4_dsi_debugfs_regs, 0, (void *)(uintptr_t)1}, {"dsi1_regs", vc4_dsi_debugfs_regs, 0, (void *)(uintptr_t)1},
{"hdmi_regs", vc4_hdmi_debugfs_regs, 0}, {"hdmi_regs", vc4_hdmi_debugfs_regs, 0},
{"vec_regs", vc4_vec_debugfs_regs, 0}, {"vec_regs", vc4_vec_debugfs_regs, 0},
{"txp_regs", vc4_txp_debugfs_regs, 0},
{"hvs_regs", vc4_hvs_debugfs_regs, 0}, {"hvs_regs", vc4_hvs_debugfs_regs, 0},
{"crtc0_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)0}, {"crtc0_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)0},
{"crtc1_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)1}, {"crtc1_regs", vc4_crtc_debugfs_regs, 0, (void *)(uintptr_t)1},
......
...@@ -344,6 +344,7 @@ static struct platform_driver *const component_drivers[] = { ...@@ -344,6 +344,7 @@ static struct platform_driver *const component_drivers[] = {
&vc4_vec_driver, &vc4_vec_driver,
&vc4_dpi_driver, &vc4_dpi_driver,
&vc4_dsi_driver, &vc4_dsi_driver,
&vc4_txp_driver,
&vc4_hvs_driver, &vc4_hvs_driver,
&vc4_crtc_driver, &vc4_crtc_driver,
&vc4_v3d_driver, &vc4_v3d_driver,
......
...@@ -73,6 +73,7 @@ struct vc4_dev { ...@@ -73,6 +73,7 @@ struct vc4_dev {
struct vc4_dpi *dpi; struct vc4_dpi *dpi;
struct vc4_dsi *dsi1; struct vc4_dsi *dsi1;
struct vc4_vec *vec; struct vc4_vec *vec;
struct vc4_txp *txp;
struct vc4_hang_state *hang_state; struct vc4_hang_state *hang_state;
...@@ -698,6 +699,8 @@ bool vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id, ...@@ -698,6 +699,8 @@ bool vc4_crtc_get_scanoutpos(struct drm_device *dev, unsigned int crtc_id,
bool in_vblank_irq, int *vpos, int *hpos, bool in_vblank_irq, int *vpos, int *hpos,
ktime_t *stime, ktime_t *etime, ktime_t *stime, ktime_t *etime,
const struct drm_display_mode *mode); const struct drm_display_mode *mode);
void vc4_crtc_handle_vblank(struct vc4_crtc *crtc);
void vc4_crtc_txp_armed(struct drm_crtc_state *state);
/* vc4_debugfs.c */ /* vc4_debugfs.c */
int vc4_debugfs_init(struct drm_minor *minor); int vc4_debugfs_init(struct drm_minor *minor);
...@@ -745,6 +748,10 @@ int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused); ...@@ -745,6 +748,10 @@ int vc4_hdmi_debugfs_regs(struct seq_file *m, void *unused);
extern struct platform_driver vc4_vec_driver; extern struct platform_driver vc4_vec_driver;
int vc4_vec_debugfs_regs(struct seq_file *m, void *unused); int vc4_vec_debugfs_regs(struct seq_file *m, void *unused);
/* vc4_txp.c */
extern struct platform_driver vc4_txp_driver;
int vc4_txp_debugfs_regs(struct seq_file *m, void *unused);
/* vc4_irq.c */ /* vc4_irq.c */
irqreturn_t vc4_irq(int irq, void *arg); irqreturn_t vc4_irq(int irq, void *arg);
void vc4_irq_preinstall(struct drm_device *dev); void vc4_irq_preinstall(struct drm_device *dev);
......
// SPDX-License-Identifier: GPL-2.0
/*
* Copyright © 2018 Broadcom
*
* Authors:
* Eric Anholt <eric@anholt.net>
* Boris Brezillon <boris.brezillon@bootlin.com>
*/
#include <drm/drm_atomic_helper.h>
#include <drm/drm_fb_cma_helper.h>
#include <drm/drm_crtc_helper.h>
#include <drm/drm_edid.h>
#include <drm/drm_panel.h>
#include <drm/drm_writeback.h>
#include <linux/clk.h>
#include <linux/component.h>
#include <linux/of_graph.h>
#include <linux/of_platform.h>
#include <linux/pm_runtime.h>
#include "vc4_drv.h"
#include "vc4_regs.h"
/* Base address of the output. Raster formats must be 4-byte aligned,
* T and LT must be 16-byte aligned or maybe utile-aligned (docs are
* inconsistent, but probably utile).
*/
#define TXP_DST_PTR 0x00
/* Pitch in bytes for raster images, 16-byte aligned. For tiled, it's
* the width in tiles.
*/
#define TXP_DST_PITCH 0x04
/* For T-tiled imgaes, DST_PITCH should be the number of tiles wide,
* shifted up.
*/
# define TXP_T_TILE_WIDTH_SHIFT 7
/* For LT-tiled images, DST_PITCH should be the number of utiles wide,
* shifted up.
*/
# define TXP_LT_TILE_WIDTH_SHIFT 4
/* Pre-rotation width/height of the image. Must match HVS config.
*
* If TFORMAT and 32-bit, limit is 1920 for 32-bit and 3840 to 16-bit
* and width/height must be tile or utile-aligned as appropriate. If
* transposing (rotating), width is limited to 1920.
*
* Height is limited to various numbers between 4088 and 4095. I'd
* just use 4088 to be safe.
*/
#define TXP_DIM 0x08
# define TXP_HEIGHT_SHIFT 16
# define TXP_HEIGHT_MASK GENMASK(31, 16)
# define TXP_WIDTH_SHIFT 0
# define TXP_WIDTH_MASK GENMASK(15, 0)
#define TXP_DST_CTRL 0x0c
/* These bits are set to 0x54 */
#define TXP_PILOT_SHIFT 24
#define TXP_PILOT_MASK GENMASK(31, 24)
/* Bits 22-23 are set to 0x01 */
#define TXP_VERSION_SHIFT 22
#define TXP_VERSION_MASK GENMASK(23, 22)
/* Powers down the internal memory. */
# define TXP_POWERDOWN BIT(21)
/* Enables storing the alpha component in 8888/4444, instead of
* filling with ~ALPHA_INVERT.
*/
# define TXP_ALPHA_ENABLE BIT(20)
/* 4 bits, each enables stores for a channel in each set of 4 bytes.
* Set to 0xf for normal operation.
*/
# define TXP_BYTE_ENABLE_SHIFT 16
# define TXP_BYTE_ENABLE_MASK GENMASK(19, 16)
/* Debug: Generate VSTART again at EOF. */
# define TXP_VSTART_AT_EOF BIT(15)
/* Debug: Terminate the current frame immediately. Stops AXI
* writes.
*/
# define TXP_ABORT BIT(14)
# define TXP_DITHER BIT(13)
/* Inverts alpha if TXP_ALPHA_ENABLE, chooses fill value for
* !TXP_ALPHA_ENABLE.
*/
# define TXP_ALPHA_INVERT BIT(12)
/* Note: I've listed the channels here in high bit (in byte 3/2/1) to
* low bit (in byte 0) order.
*/
# define TXP_FORMAT_SHIFT 8
# define TXP_FORMAT_MASK GENMASK(11, 8)
# define TXP_FORMAT_ABGR4444 0
# define TXP_FORMAT_ARGB4444 1
# define TXP_FORMAT_BGRA4444 2
# define TXP_FORMAT_RGBA4444 3
# define TXP_FORMAT_BGR565 6
# define TXP_FORMAT_RGB565 7
/* 888s are non-rotated, raster-only */
# define TXP_FORMAT_BGR888 8
# define TXP_FORMAT_RGB888 9
# define TXP_FORMAT_ABGR8888 12
# define TXP_FORMAT_ARGB8888 13
# define TXP_FORMAT_BGRA8888 14
# define TXP_FORMAT_RGBA8888 15
/* If TFORMAT is set, generates LT instead of T format. */
# define TXP_LINEAR_UTILE BIT(7)
/* Rotate output by 90 degrees. */
# define TXP_TRANSPOSE BIT(6)
/* Generate a tiled format for V3D. */
# define TXP_TFORMAT BIT(5)
/* Generates some undefined test mode output. */
# define TXP_TEST_MODE BIT(4)
/* Request odd field from HVS. */
# define TXP_FIELD BIT(3)
/* Raise interrupt when idle. */
# define TXP_EI BIT(2)
/* Set when generating a frame, clears when idle. */
# define TXP_BUSY BIT(1)
/* Starts a frame. Self-clearing. */
# define TXP_GO BIT(0)
/* Number of lines received and committed to memory. */
#define TXP_PROGRESS 0x10
#define TXP_READ(offset) readl(txp->regs + (offset))
#define TXP_WRITE(offset, val) writel(val, txp->regs + (offset))
struct vc4_txp {
struct platform_device *pdev;
struct drm_writeback_connector connector;
void __iomem *regs;
};
static inline struct vc4_txp *encoder_to_vc4_txp(struct drm_encoder *encoder)
{
return container_of(encoder, struct vc4_txp, connector.encoder);
}
static inline struct vc4_txp *connector_to_vc4_txp(struct drm_connector *conn)
{
return container_of(conn, struct vc4_txp, connector.base);
}
#define TXP_REG(reg) { reg, #reg }
static const struct {
u32 reg;
const char *name;
} txp_regs[] = {
TXP_REG(TXP_DST_PTR),
TXP_REG(TXP_DST_PITCH),
TXP_REG(TXP_DIM),
TXP_REG(TXP_DST_CTRL),
TXP_REG(TXP_PROGRESS),
};
#ifdef CONFIG_DEBUG_FS
int vc4_txp_debugfs_regs(struct seq_file *m, void *unused)
{
struct drm_info_node *node = (struct drm_info_node *)m->private;
struct drm_device *dev = node->minor->dev;
struct vc4_dev *vc4 = to_vc4_dev(dev);
struct vc4_txp *txp = vc4->txp;
int i;
if (!txp)
return 0;
for (i = 0; i < ARRAY_SIZE(txp_regs); i++) {
seq_printf(m, "%s (0x%04x): 0x%08x\n",
txp_regs[i].name, txp_regs[i].reg,
TXP_READ(txp_regs[i].reg));
}
return 0;
}
#endif
static int vc4_txp_connector_get_modes(struct drm_connector *connector)
{
struct drm_device *dev = connector->dev;
return drm_add_modes_noedid(connector, dev->mode_config.max_width,
dev->mode_config.max_height);
}
static enum drm_mode_status
vc4_txp_connector_mode_valid(struct drm_connector *connector,
struct drm_display_mode *mode)
{
struct drm_device *dev = connector->dev;
struct drm_mode_config *mode_config = &dev->mode_config;
int w = mode->hdisplay, h = mode->vdisplay;
if (w < mode_config->min_width || w > mode_config->max_width)
return MODE_BAD_HVALUE;
if (h < mode_config->min_height || h > mode_config->max_height)
return MODE_BAD_VVALUE;
return MODE_OK;
}
static const u32 drm_fmts[] = {
DRM_FORMAT_RGB888,
DRM_FORMAT_BGR888,
DRM_FORMAT_XRGB8888,
DRM_FORMAT_XBGR8888,
DRM_FORMAT_ARGB8888,
DRM_FORMAT_ABGR8888,
DRM_FORMAT_RGBX8888,
DRM_FORMAT_BGRX8888,
DRM_FORMAT_RGBA8888,
DRM_FORMAT_BGRA8888,
};
static const u32 txp_fmts[] = {
TXP_FORMAT_RGB888,
TXP_FORMAT_BGR888,
TXP_FORMAT_ARGB8888,
TXP_FORMAT_ABGR8888,
TXP_FORMAT_ARGB8888,
TXP_FORMAT_ABGR8888,
TXP_FORMAT_RGBA8888,
TXP_FORMAT_BGRA8888,
TXP_FORMAT_RGBA8888,
TXP_FORMAT_BGRA8888,
};
static int vc4_txp_connector_atomic_check(struct drm_connector *conn,
struct drm_connector_state *conn_state)
{
struct drm_crtc_state *crtc_state;
struct drm_gem_cma_object *gem;
struct drm_framebuffer *fb;
int i;
if (!conn_state->writeback_job || !conn_state->writeback_job->fb)
return 0;
crtc_state = drm_atomic_get_new_crtc_state(conn_state->state,
conn_state->crtc);
fb = conn_state->writeback_job->fb;
if (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;
}
for (i = 0; i < ARRAY_SIZE(drm_fmts); i++) {
if (fb->format->format == drm_fmts[i])
break;
}
if (i == ARRAY_SIZE(drm_fmts))
return -EINVAL;
gem = drm_fb_cma_get_gem_obj(fb, 0);
/* Pitch must be aligned on 16 bytes. */
if (fb->pitches[0] & GENMASK(3, 0))
return -EINVAL;
vc4_crtc_txp_armed(crtc_state);
return 0;
}
static void vc4_txp_connector_atomic_commit(struct drm_connector *conn,
struct drm_connector_state *conn_state)
{
struct vc4_txp *txp = connector_to_vc4_txp(conn);
struct drm_gem_cma_object *gem;
struct drm_display_mode *mode;
struct drm_framebuffer *fb;
u32 ctrl;
int i;
if (WARN_ON(!conn_state->writeback_job ||
!conn_state->writeback_job->fb))
return;
mode = &conn_state->crtc->state->adjusted_mode;
fb = conn_state->writeback_job->fb;
for (i = 0; i < ARRAY_SIZE(drm_fmts); i++) {
if (fb->format->format == drm_fmts[i])
break;
}
if (WARN_ON(i == ARRAY_SIZE(drm_fmts)))
return;
ctrl = TXP_GO | TXP_VSTART_AT_EOF | TXP_EI |
VC4_SET_FIELD(0xf, TXP_BYTE_ENABLE) |
VC4_SET_FIELD(txp_fmts[i], TXP_FORMAT);
if (fb->format->has_alpha)
ctrl |= TXP_ALPHA_ENABLE;
gem = drm_fb_cma_get_gem_obj(fb, 0);
TXP_WRITE(TXP_DST_PTR, gem->paddr + fb->offsets[0]);
TXP_WRITE(TXP_DST_PITCH, fb->pitches[0]);
TXP_WRITE(TXP_DIM,
VC4_SET_FIELD(mode->hdisplay, TXP_WIDTH) |
VC4_SET_FIELD(mode->vdisplay, TXP_HEIGHT));
TXP_WRITE(TXP_DST_CTRL, ctrl);
drm_writeback_queue_job(&txp->connector, conn_state->writeback_job);
}
static const struct drm_connector_helper_funcs vc4_txp_connector_helper_funcs = {
.get_modes = vc4_txp_connector_get_modes,
.mode_valid = vc4_txp_connector_mode_valid,
.atomic_check = vc4_txp_connector_atomic_check,
.atomic_commit = vc4_txp_connector_atomic_commit,
};
static enum drm_connector_status
vc4_txp_connector_detect(struct drm_connector *connector, bool force)
{
return connector_status_connected;
}
static void vc4_txp_connector_destroy(struct drm_connector *connector)
{
drm_connector_unregister(connector);
drm_connector_cleanup(connector);
}
static const struct drm_connector_funcs vc4_txp_connector_funcs = {
.detect = vc4_txp_connector_detect,
.fill_modes = drm_helper_probe_single_connector_modes,
.destroy = vc4_txp_connector_destroy,
.reset = drm_atomic_helper_connector_reset,
.atomic_duplicate_state = drm_atomic_helper_connector_duplicate_state,
.atomic_destroy_state = drm_atomic_helper_connector_destroy_state,
};
static void vc4_txp_encoder_disable(struct drm_encoder *encoder)
{
struct vc4_txp *txp = encoder_to_vc4_txp(encoder);
if (TXP_READ(TXP_DST_CTRL) & TXP_BUSY) {
unsigned long timeout = jiffies + msecs_to_jiffies(1000);
TXP_WRITE(TXP_DST_CTRL, TXP_ABORT);
while (TXP_READ(TXP_DST_CTRL) & TXP_BUSY &&
time_before(jiffies, timeout))
;
WARN_ON(TXP_READ(TXP_DST_CTRL) & TXP_BUSY);
}
TXP_WRITE(TXP_DST_CTRL, TXP_POWERDOWN);
}
static const struct drm_encoder_helper_funcs vc4_txp_encoder_helper_funcs = {
.disable = vc4_txp_encoder_disable,
};
static irqreturn_t vc4_txp_interrupt(int irq, void *data)
{
struct vc4_txp *txp = data;
TXP_WRITE(TXP_DST_CTRL, TXP_READ(TXP_DST_CTRL) & ~TXP_EI);
vc4_crtc_handle_vblank(to_vc4_crtc(txp->connector.base.state->crtc));
drm_writeback_signal_completion(&txp->connector, 0);
return IRQ_HANDLED;
}
static int vc4_txp_bind(struct device *dev, struct device *master, void *data)
{
struct platform_device *pdev = to_platform_device(dev);
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct vc4_txp *txp;
int ret, irq;
irq = platform_get_irq(pdev, 0);
if (irq < 0)
return irq;
txp = devm_kzalloc(dev, sizeof(*txp), GFP_KERNEL);
if (!txp)
return -ENOMEM;
txp->pdev = pdev;
txp->regs = vc4_ioremap_regs(pdev, 0);
if (IS_ERR(txp->regs))
return PTR_ERR(txp->regs);
drm_connector_helper_add(&txp->connector.base,
&vc4_txp_connector_helper_funcs);
ret = drm_writeback_connector_init(drm, &txp->connector,
&vc4_txp_connector_funcs,
&vc4_txp_encoder_helper_funcs,
drm_fmts, ARRAY_SIZE(drm_fmts));
if (ret)
return ret;
ret = devm_request_irq(dev, irq, vc4_txp_interrupt, 0,
dev_name(dev), txp);
if (ret)
return ret;
dev_set_drvdata(dev, txp);
vc4->txp = txp;
return 0;
}
static void vc4_txp_unbind(struct device *dev, struct device *master,
void *data)
{
struct drm_device *drm = dev_get_drvdata(master);
struct vc4_dev *vc4 = to_vc4_dev(drm);
struct vc4_txp *txp = dev_get_drvdata(dev);
vc4_txp_connector_destroy(&txp->connector.base);
vc4->txp = NULL;
}
static const struct component_ops vc4_txp_ops = {
.bind = vc4_txp_bind,
.unbind = vc4_txp_unbind,
};
static int vc4_txp_probe(struct platform_device *pdev)
{
return component_add(&pdev->dev, &vc4_txp_ops);
}
static int vc4_txp_remove(struct platform_device *pdev)
{
component_del(&pdev->dev, &vc4_txp_ops);
return 0;
}
static const struct of_device_id vc4_txp_dt_match[] = {
{ .compatible = "brcm,bcm2835-txp" },
{ /* sentinel */ },
};
struct platform_driver vc4_txp_driver = {
.probe = vc4_txp_probe,
.remove = vc4_txp_remove,
.driver = {
.name = "vc4_txp",
.of_match_table = vc4_txp_dt_match,
},
};
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