diff mbox

[PATCHv2,03/10] Revert "drm: omapdrm: Remove manual update display support"

Message ID 20170305004309.28259-3-sre@kernel.org (mailing list archive)
State New, archived
Headers show

Commit Message

Sebastian Reichel March 5, 2017, 12:43 a.m. UTC 
This reverts commit 5a35876e2830511cb8110667fc426c6a6165a593.

Revert the removal of manual update display support in
preparation for DSI command mode panels.

Signed-off-By: Sebastian Reichel <sre@kernel.org>
[tony@atomide.com: left out unused omap_framebuffer_dirty]
Signed-off-by: Tony Lindgren <tony@atomide.com>
---
 drivers/gpu/drm/omapdrm/omap_connector.c | 12 +++++++
 drivers/gpu/drm/omapdrm/omap_drv.h       |  4 +++
 drivers/gpu/drm/omapdrm/omap_fb.c        | 28 ++++++++++++++++
 drivers/gpu/drm/omapdrm/omap_fbdev.c     | 57 +++++++++++++++++++++++++++++---
 4 files changed, 97 insertions(+), 4 deletions(-)

Comments

Tomi Valkeinen March 20, 2017, 11:07 a.m. UTC | #1 
On 05/03/17 02:43, Sebastian Reichel wrote:
> This reverts commit 5a35876e2830511cb8110667fc426c6a6165a593.
> 
> Revert the removal of manual update display support in
> preparation for DSI command mode panels.

I think it's much better to just add the manual update support from
scratch rather than first reverting this old cleanup commit and then
adding more bits and pieces.

 Tomi
Tony Lindgren March 20, 2017, 4:14 p.m. UTC | #2 
* Tomi Valkeinen <tomi.valkeinen@ti.com> [170320 04:10]:
> On 05/03/17 02:43, Sebastian Reichel wrote:
> > This reverts commit 5a35876e2830511cb8110667fc426c6a6165a593.
> > 
> > Revert the removal of manual update display support in
> > preparation for DSI command mode panels.
> 
> I think it's much better to just add the manual update support from
> scratch rather than first reverting this old cleanup commit and then
> adding more bits and pieces.

Do you know if the command mode panels support partial refresh?

Just wondering if we want to keep "int x, int y, int w, int h"
around for omap_connector_flush() or whatever it ends up being?

Regards,

Tony
Tomi Valkeinen March 20, 2017, 4:35 p.m. UTC | #3 
On 20/03/17 18:14, Tony Lindgren wrote:
> * Tomi Valkeinen <tomi.valkeinen@ti.com> [170320 04:10]:
>> On 05/03/17 02:43, Sebastian Reichel wrote:
>>> This reverts commit 5a35876e2830511cb8110667fc426c6a6165a593.
>>>
>>> Revert the removal of manual update display support in
>>> preparation for DSI command mode panels.
>>
>> I think it's much better to just add the manual update support from
>> scratch rather than first reverting this old cleanup commit and then
>> adding more bits and pieces.
> 
> Do you know if the command mode panels support partial refresh?
> 
> Just wondering if we want to keep "int x, int y, int w, int h"
> around for omap_connector_flush() or whatever it ends up being?

Partial update? Yes they do. But setting everything up for partial
update on the DSS side is horribly complex, and support for that was
removed from DSS driver long ago.

So I think those parameters can be removed.

 Tomi
Tony Lindgren March 20, 2017, 4:43 p.m. UTC | #4 
* Tomi Valkeinen <tomi.valkeinen@ti.com> [170320 09:38]:
> On 20/03/17 18:14, Tony Lindgren wrote:
> > * Tomi Valkeinen <tomi.valkeinen@ti.com> [170320 04:10]:
> >> On 05/03/17 02:43, Sebastian Reichel wrote:
> >>> This reverts commit 5a35876e2830511cb8110667fc426c6a6165a593.
> >>>
> >>> Revert the removal of manual update display support in
> >>> preparation for DSI command mode panels.
> >>
> >> I think it's much better to just add the manual update support from
> >> scratch rather than first reverting this old cleanup commit and then
> >> adding more bits and pieces.
> > 
> > Do you know if the command mode panels support partial refresh?
> > 
> > Just wondering if we want to keep "int x, int y, int w, int h"
> > around for omap_connector_flush() or whatever it ends up being?
> 
> Partial update? Yes they do. But setting everything up for partial
> update on the DSS side is horribly complex, and support for that was
> removed from DSS driver long ago.
> 
> So I think those parameters can be removed.

OK works for me.

Regards,

Tony
diff mbox

Patch

diff --git a/drivers/gpu/drm/omapdrm/omap_connector.c b/drivers/gpu/drm/omapdrm/omap_connector.c
index f90e2d22c5ec..7b2a9f680dce 100644
--- a/drivers/gpu/drm/omapdrm/omap_connector.c
+++ b/drivers/gpu/drm/omapdrm/omap_connector.c
@@ -205,6 +205,18 @@  static const struct drm_connector_helper_funcs omap_connector_helper_funcs = {
 	.mode_valid = omap_connector_mode_valid,
 };
 
+/* flush an area of the framebuffer (in case of manual update display that
+ * is not automatically flushed)
+ */
+void omap_connector_flush(struct drm_connector *connector,
+		int x, int y, int w, int h)
+{
+	struct omap_connector *omap_connector = to_omap_connector(connector);
+
+	/* TODO: enable when supported in dss */
+	VERB("%s: %d,%d, %dx%d", omap_connector->dssdev->name, x, y, w, h);
+}
+
 /* initialize connector */
 struct drm_connector *omap_connector_init(struct drm_device *dev,
 		int connector_type, struct omap_dss_device *dssdev,
diff --git a/drivers/gpu/drm/omapdrm/omap_drv.h b/drivers/gpu/drm/omapdrm/omap_drv.h
index 65977982f15f..5b1061586401 100644
--- a/drivers/gpu/drm/omapdrm/omap_drv.h
+++ b/drivers/gpu/drm/omapdrm/omap_drv.h
@@ -155,6 +155,8 @@  struct drm_connector *omap_connector_init(struct drm_device *dev,
 struct drm_encoder *omap_connector_attached_encoder(
 		struct drm_connector *connector);
 bool omap_connector_get_hdmi_mode(struct drm_connector *connector);
+void omap_connector_flush(struct drm_connector *connector,
+		int x, int y, int w, int h);
 
 uint32_t omap_framebuffer_get_formats(uint32_t *pixel_formats,
 		uint32_t max_formats, enum omap_color_mode supported_modes);
@@ -169,6 +171,8 @@  void omap_framebuffer_update_scanout(struct drm_framebuffer *fb,
 struct drm_connector *omap_framebuffer_get_next_connector(
 		struct drm_framebuffer *fb, struct drm_connector *from);
 bool omap_framebuffer_supports_rotation(struct drm_framebuffer *fb);
+void omap_framebuffer_flush(struct drm_framebuffer *fb,
+		int x, int y, int w, int h);
 
 void omap_gem_init(struct drm_device *dev);
 void omap_gem_deinit(struct drm_device *dev);
diff --git a/drivers/gpu/drm/omapdrm/omap_fb.c b/drivers/gpu/drm/omapdrm/omap_fb.c
index 29dc677dd4d3..b6ae28fe3257 100644
--- a/drivers/gpu/drm/omapdrm/omap_fb.c
+++ b/drivers/gpu/drm/omapdrm/omap_fb.c
@@ -333,6 +333,34 @@  struct drm_connector *omap_framebuffer_get_next_connector(
 	return NULL;
 }
 
+/* flush an area of the framebuffer (in case of manual update display that
+ * is not automatically flushed)
+ */
+void omap_framebuffer_flush(struct drm_framebuffer *fb,
+		int x, int y, int w, int h)
+{
+	struct drm_connector *connector = NULL;
+
+	VERB("flush: %d,%d %dx%d, fb=%p", x, y, w, h, fb);
+
+	/* FIXME: This is racy - no protection against modeset config changes. */
+	while ((connector = omap_framebuffer_get_next_connector(fb, connector))) {
+		/* only consider connectors that are part of a chain */
+		if (connector->encoder && connector->encoder->crtc) {
+			/* TODO: maybe this should propagate thru the crtc who
+			 * could do the coordinate translation..
+			 */
+			struct drm_crtc *crtc = connector->encoder->crtc;
+			int cx = max(0, x - crtc->x);
+			int cy = max(0, y - crtc->y);
+			int cw = w + (x - crtc->x) - cx;
+			int ch = h + (y - crtc->y) - cy;
+
+			omap_connector_flush(connector, cx, cy, cw, ch);
+		}
+	}
+}
+
 #ifdef CONFIG_DEBUG_FS
 void omap_framebuffer_describe(struct drm_framebuffer *fb, struct seq_file *m)
 {
diff --git a/drivers/gpu/drm/omapdrm/omap_fbdev.c b/drivers/gpu/drm/omapdrm/omap_fbdev.c
index 942c4d483008..6c52a9fa4a37 100644
--- a/drivers/gpu/drm/omapdrm/omap_fbdev.c
+++ b/drivers/gpu/drm/omapdrm/omap_fbdev.c
@@ -42,8 +42,42 @@  struct omap_fbdev {
 	struct work_struct work;
 };
 
+static void omap_fbdev_flush(struct fb_info *fbi, int x, int y, int w, int h);
 static struct drm_fb_helper *get_fb(struct fb_info *fbi);
 
+static ssize_t omap_fbdev_write(struct fb_info *fbi, const char __user *buf,
+		size_t count, loff_t *ppos)
+{
+	ssize_t res;
+
+	res = fb_sys_write(fbi, buf, count, ppos);
+	omap_fbdev_flush(fbi, 0, 0, fbi->var.xres, fbi->var.yres);
+
+	return res;
+}
+
+static void omap_fbdev_fillrect(struct fb_info *fbi,
+		const struct fb_fillrect *rect)
+{
+	sys_fillrect(fbi, rect);
+	omap_fbdev_flush(fbi, rect->dx, rect->dy, rect->width, rect->height);
+}
+
+static void omap_fbdev_copyarea(struct fb_info *fbi,
+		const struct fb_copyarea *area)
+{
+	sys_copyarea(fbi, area);
+	omap_fbdev_flush(fbi, area->dx, area->dy, area->width, area->height);
+}
+
+static void omap_fbdev_imageblit(struct fb_info *fbi,
+		const struct fb_image *image)
+{
+	sys_imageblit(fbi, image);
+	omap_fbdev_flush(fbi, image->dx, image->dy,
+				image->width, image->height);
+}
+
 static void pan_worker(struct work_struct *work)
 {
 	struct omap_fbdev *fbdev = container_of(work, struct omap_fbdev, work);
@@ -88,10 +122,10 @@  static struct fb_ops omap_fb_ops = {
 	 * basic fbdev ops which write to the framebuffer
 	 */
 	.fb_read = drm_fb_helper_sys_read,
-	.fb_write = drm_fb_helper_sys_write,
-	.fb_fillrect = drm_fb_helper_sys_fillrect,
-	.fb_copyarea = drm_fb_helper_sys_copyarea,
-	.fb_imageblit = drm_fb_helper_sys_imageblit,
+	.fb_write = omap_fbdev_write,
+	.fb_fillrect = omap_fbdev_fillrect,
+	.fb_copyarea = omap_fbdev_copyarea,
+	.fb_imageblit = omap_fbdev_imageblit,
 
 	.fb_pan_display = omap_fbdev_pan_display,
 };
@@ -245,6 +279,21 @@  static struct drm_fb_helper *get_fb(struct fb_info *fbi)
 	return fbi->par;
 }
 
+/* flush an area of the framebuffer (in case of manual update display that
+ * is not automatically flushed)
+ */
+static void omap_fbdev_flush(struct fb_info *fbi, int x, int y, int w, int h)
+{
+	struct drm_fb_helper *helper = get_fb(fbi);
+
+	if (!helper)
+		return;
+
+	VERB("flush fbdev: %d,%d %dx%d, fbi=%p", x, y, w, h, fbi);
+
+	omap_framebuffer_flush(helper->fb, x, y, w, h);
+}
+
 /* initialize fbdev helper */
 struct drm_fb_helper *omap_fbdev_init(struct drm_device *dev)
 {