From: Thomas Zimmermann <tzimmermann@suse.de>
To: airlied@linux.ie, daniel@ffwll.ch, kraxel@redhat.com,
maarten.lankhorst@linux.intel.com, mripard@kernel.org,
hdegoede@redhat.com, david@lechnology.com, noralf@tronnes.org,
sean@poorly.run, oleksandr_andrushchenko@epam.com,
sam@ravnborg.org, laurent.pinchart@ideasonboard.com,
emil.velikov@collabora.com
Cc: xen-devel@lists.xenproject.org,
Thomas Zimmermann <tzimmermann@suse.de>,
dri-devel@lists.freedesktop.org,
virtualization@lists.linux-foundation.org
Subject: [PATCH v2 4/4] drm/simple-kms: Let DRM core send VBLANK events by default
Date: Wed, 15 Jan 2020 13:52:26 +0100 [thread overview]
Message-ID: <20200115125226.13843-5-tzimmermann@suse.de> (raw)
In-Reply-To: <20200115125226.13843-1-tzimmermann@suse.de>
In drm_atomic_helper_fake_vblank() the DRM core sends out VBLANK events
if struct drm_crtc_state.no_vblank is enabled in the check() callbacks.
For drivers that have neither an enable_vblank() callback nor a check()
callback, the simple-KMS helpers enable VBLANK generation by default. This
simplifies bochs, udl, several tiny drivers, and drivers based upon MIPI
DPI helpers. The driver for Xen explicitly disables no_vblank, as it has
its own logic for sending these events.
Signed-off-by: Thomas Zimmermann <tzimmermann@suse.de>
---
drivers/gpu/drm/bochs/bochs_kms.c | 9 ---------
drivers/gpu/drm/drm_mipi_dbi.c | 9 ---------
drivers/gpu/drm/drm_simple_kms_helper.c | 19 +++++++++++++++----
drivers/gpu/drm/tiny/gm12u320.c | 9 ---------
drivers/gpu/drm/tiny/ili9225.c | 9 ---------
drivers/gpu/drm/tiny/repaper.c | 9 ---------
drivers/gpu/drm/tiny/st7586.c | 9 ---------
drivers/gpu/drm/udl/udl_modeset.c | 11 -----------
drivers/gpu/drm/xen/xen_drm_front_kms.c | 13 +++++++++++++
9 files changed, 28 insertions(+), 69 deletions(-)
diff --git a/drivers/gpu/drm/bochs/bochs_kms.c b/drivers/gpu/drm/bochs/bochs_kms.c
index 3f0006c2470d..ff275faee88d 100644
--- a/drivers/gpu/drm/bochs/bochs_kms.c
+++ b/drivers/gpu/drm/bochs/bochs_kms.c
@@ -7,7 +7,6 @@
#include <drm/drm_atomic_helper.h>
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_probe_helper.h>
-#include <drm/drm_vblank.h>
#include "bochs.h"
@@ -57,16 +56,8 @@ static void bochs_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state)
{
struct bochs_device *bochs = pipe->crtc.dev->dev_private;
- struct drm_crtc *crtc = &pipe->crtc;
bochs_plane_update(bochs, pipe->plane.state);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- crtc->state->event = NULL;
- spin_unlock_irq(&crtc->dev->event_lock);
- }
}
static const struct drm_simple_display_pipe_funcs bochs_pipe_funcs = {
diff --git a/drivers/gpu/drm/drm_mipi_dbi.c b/drivers/gpu/drm/drm_mipi_dbi.c
index 16bff1be4b8a..13b753cb3f67 100644
--- a/drivers/gpu/drm/drm_mipi_dbi.c
+++ b/drivers/gpu/drm/drm_mipi_dbi.c
@@ -24,7 +24,6 @@
#include <drm/drm_modes.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_rect.h>
-#include <drm/drm_vblank.h>
#include <video/mipi_display.h>
#define MIPI_DBI_MAX_SPI_READ_SPEED 2000000 /* 2MHz */
@@ -299,18 +298,10 @@ void mipi_dbi_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state)
{
struct drm_plane_state *state = pipe->plane.state;
- struct drm_crtc *crtc = &pipe->crtc;
struct drm_rect rect;
if (drm_atomic_helper_damage_merged(old_state, state, &rect))
mipi_dbi_fb_dirty(state->fb, &rect);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- spin_unlock_irq(&crtc->dev->event_lock);
- crtc->state->event = NULL;
- }
}
EXPORT_SYMBOL(mipi_dbi_pipe_update);
diff --git a/drivers/gpu/drm/drm_simple_kms_helper.c b/drivers/gpu/drm/drm_simple_kms_helper.c
index 15fb516ae2d8..4414c7a5b2ce 100644
--- a/drivers/gpu/drm/drm_simple_kms_helper.c
+++ b/drivers/gpu/drm/drm_simple_kms_helper.c
@@ -146,10 +146,21 @@ static int drm_simple_kms_plane_atomic_check(struct drm_plane *plane,
if (!plane_state->visible)
return 0;
- if (!pipe->funcs || !pipe->funcs->check)
- return 0;
-
- return pipe->funcs->check(pipe, plane_state, crtc_state);
+ if (pipe->funcs) {
+ if (pipe->funcs->check)
+ return pipe->funcs->check(pipe, plane_state,
+ crtc_state);
+ if (pipe->funcs->enable_vblank)
+ return 0;
+ }
+
+ /* Drivers without VBLANK support have to fake VBLANK events. As
+ * there's no check() callback to enable this, set the no_vblank
+ * field by default.
+ */
+ crtc_state->no_vblank = true;
+
+ return 0;
}
static void drm_simple_kms_plane_atomic_update(struct drm_plane *plane,
diff --git a/drivers/gpu/drm/tiny/gm12u320.c b/drivers/gpu/drm/tiny/gm12u320.c
index 94fb1f593564..a48173441ae0 100644
--- a/drivers/gpu/drm/tiny/gm12u320.c
+++ b/drivers/gpu/drm/tiny/gm12u320.c
@@ -22,7 +22,6 @@
#include <drm/drm_modeset_helper_vtables.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
-#include <drm/drm_vblank.h>
static bool eco_mode;
module_param(eco_mode, bool, 0644);
@@ -610,18 +609,10 @@ static void gm12u320_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state)
{
struct drm_plane_state *state = pipe->plane.state;
- struct drm_crtc *crtc = &pipe->crtc;
struct drm_rect rect;
if (drm_atomic_helper_damage_merged(old_state, state, &rect))
gm12u320_fb_mark_dirty(pipe->plane.state->fb, &rect);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- crtc->state->event = NULL;
- spin_unlock_irq(&crtc->dev->event_lock);
- }
}
static const struct drm_simple_display_pipe_funcs gm12u320_pipe_funcs = {
diff --git a/drivers/gpu/drm/tiny/ili9225.c b/drivers/gpu/drm/tiny/ili9225.c
index c66acc566c2b..802fb8dde1b6 100644
--- a/drivers/gpu/drm/tiny/ili9225.c
+++ b/drivers/gpu/drm/tiny/ili9225.c
@@ -26,7 +26,6 @@
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_mipi_dbi.h>
#include <drm/drm_rect.h>
-#include <drm/drm_vblank.h>
#define ILI9225_DRIVER_READ_CODE 0x00
#define ILI9225_DRIVER_OUTPUT_CONTROL 0x01
@@ -165,18 +164,10 @@ static void ili9225_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state)
{
struct drm_plane_state *state = pipe->plane.state;
- struct drm_crtc *crtc = &pipe->crtc;
struct drm_rect rect;
if (drm_atomic_helper_damage_merged(old_state, state, &rect))
ili9225_fb_dirty(state->fb, &rect);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- spin_unlock_irq(&crtc->dev->event_lock);
- crtc->state->event = NULL;
- }
}
static void ili9225_pipe_enable(struct drm_simple_display_pipe *pipe,
diff --git a/drivers/gpu/drm/tiny/repaper.c b/drivers/gpu/drm/tiny/repaper.c
index 76d179200775..183484595aea 100644
--- a/drivers/gpu/drm/tiny/repaper.c
+++ b/drivers/gpu/drm/tiny/repaper.c
@@ -33,7 +33,6 @@
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_modes.h>
#include <drm/drm_rect.h>
-#include <drm/drm_vblank.h>
#include <drm/drm_probe_helper.h>
#include <drm/drm_simple_kms_helper.h>
@@ -856,18 +855,10 @@ static void repaper_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state)
{
struct drm_plane_state *state = pipe->plane.state;
- struct drm_crtc *crtc = &pipe->crtc;
struct drm_rect rect;
if (drm_atomic_helper_damage_merged(old_state, state, &rect))
repaper_fb_dirty(state->fb);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- spin_unlock_irq(&crtc->dev->event_lock);
- crtc->state->event = NULL;
- }
}
static const struct drm_simple_display_pipe_funcs repaper_pipe_funcs = {
diff --git a/drivers/gpu/drm/tiny/st7586.c b/drivers/gpu/drm/tiny/st7586.c
index 060cc756194f..9ef559dd3191 100644
--- a/drivers/gpu/drm/tiny/st7586.c
+++ b/drivers/gpu/drm/tiny/st7586.c
@@ -23,7 +23,6 @@
#include <drm/drm_gem_framebuffer_helper.h>
#include <drm/drm_mipi_dbi.h>
#include <drm/drm_rect.h>
-#include <drm/drm_vblank.h>
/* controller-specific commands */
#define ST7586_DISP_MODE_GRAY 0x38
@@ -159,18 +158,10 @@ static void st7586_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_state)
{
struct drm_plane_state *state = pipe->plane.state;
- struct drm_crtc *crtc = &pipe->crtc;
struct drm_rect rect;
if (drm_atomic_helper_damage_merged(old_state, state, &rect))
st7586_fb_dirty(state->fb, &rect);
-
- if (crtc->state->event) {
- spin_lock_irq(&crtc->dev->event_lock);
- drm_crtc_send_vblank_event(crtc, crtc->state->event);
- spin_unlock_irq(&crtc->dev->event_lock);
- crtc->state->event = NULL;
- }
}
static void st7586_pipe_enable(struct drm_simple_display_pipe *pipe,
diff --git a/drivers/gpu/drm/udl/udl_modeset.c b/drivers/gpu/drm/udl/udl_modeset.c
index 22af17959053..d59ebac70b15 100644
--- a/drivers/gpu/drm/udl/udl_modeset.c
+++ b/drivers/gpu/drm/udl/udl_modeset.c
@@ -375,8 +375,6 @@ udl_simple_display_pipe_enable(struct drm_simple_display_pipe *pipe,
char *wrptr;
int color_depth = UDL_COLOR_DEPTH_16BPP;
- crtc_state->no_vblank = true;
-
buf = (char *)udl->mode_buf;
/* This first section has to do with setting the base address on the
@@ -428,14 +426,6 @@ udl_simple_display_pipe_disable(struct drm_simple_display_pipe *pipe)
udl_submit_urb(dev, urb, buf - (char *)urb->transfer_buffer);
}
-static int
-udl_simple_display_pipe_check(struct drm_simple_display_pipe *pipe,
- struct drm_plane_state *plane_state,
- struct drm_crtc_state *crtc_state)
-{
- return 0;
-}
-
static void
udl_simple_display_pipe_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_plane_state)
@@ -457,7 +447,6 @@ struct drm_simple_display_pipe_funcs udl_simple_display_pipe_funcs = {
.mode_valid = udl_simple_display_pipe_mode_valid,
.enable = udl_simple_display_pipe_enable,
.disable = udl_simple_display_pipe_disable,
- .check = udl_simple_display_pipe_check,
.update = udl_simple_display_pipe_update,
.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
};
diff --git a/drivers/gpu/drm/xen/xen_drm_front_kms.c b/drivers/gpu/drm/xen/xen_drm_front_kms.c
index 4f34c5208180..8ec29d5d3353 100644
--- a/drivers/gpu/drm/xen/xen_drm_front_kms.c
+++ b/drivers/gpu/drm/xen/xen_drm_front_kms.c
@@ -220,6 +220,18 @@ static bool display_send_page_flip(struct drm_simple_display_pipe *pipe,
return false;
}
+static int display_check(struct drm_simple_display_pipe *pipe,
+ struct drm_plane_state *plane_state,
+ struct drm_crtc_state *crtc_state)
+{
+ /* Make sure the simple DRM helpers don't enable VBLANK
+ * generation. Xen has it's own logic to do so.
+ */
+ crtc_state->no_vblank = false;
+
+ return 0;
+}
+
static void display_update(struct drm_simple_display_pipe *pipe,
struct drm_plane_state *old_plane_state)
{
@@ -284,6 +296,7 @@ static const struct drm_simple_display_pipe_funcs display_funcs = {
.enable = display_enable,
.disable = display_disable,
.prepare_fb = drm_gem_fb_simple_display_pipe_prepare_fb,
+ .check = display_check,
.update = display_update,
};
--
2.24.1
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next prev parent reply other threads:[~2020-01-15 12:52 UTC|newest]
Thread overview: 13+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-01-15 12:52 [PATCH v2 0/4] Use no_vblank property for drivers without VBLANK Thomas Zimmermann
2020-01-15 12:52 ` [PATCH v2 1/4] drm: Document struct drm_crtc_state.no_vblank for faking VBLANK events Thomas Zimmermann
2020-01-15 12:52 ` [PATCH v2 2/4] drm/ast: Set struct drm_crtc_state.no_vblank in atomic_check() Thomas Zimmermann
2020-01-15 12:52 ` [PATCH v2 3/4] drm/cirrus: Let DRM core send VBLANK events Thomas Zimmermann
2020-01-15 12:52 ` Thomas Zimmermann [this message]
2020-01-16 6:41 ` [PATCH v2 4/4] drm/simple-kms: Let DRM core send VBLANK events by default Daniel Vetter
2020-01-16 7:37 ` Thomas Zimmermann
2020-01-16 17:22 ` Emil Velikov
2020-01-16 23:59 ` Daniel Vetter
2020-01-17 7:17 ` Thomas Zimmermann
2020-01-22 8:11 ` Daniel Vetter
2020-01-22 8:20 ` Thomas Zimmermann
2020-01-15 13:04 ` [PATCH v2 0/4] Use no_vblank property for drivers without VBLANK Hans de Goede
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