From: Geert Uytterhoeven <geert@linux-m68k.org> To: Sui Jingfeng <suijingfeng@loongson.cn> Cc: Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>, David Airlie <airlied@gmail.com>, Daniel Vetter <daniel@ffwll.ch>, Thomas Zimmermann <tzimmermann@suse.de>, Magnus Damm <magnus.damm@gmail.com>, linux-renesas-soc@vger.kernel.org, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org Subject: Re: [28/39] drm: renesas: shmobile: Use drm_crtc_handle_vblank() Date: Sun, 25 Jun 2023 10:55:56 +0200 [thread overview] Message-ID: <CAMuHMdX8=16pRQr=2CouUWBUhD16Mkh3_WaNZmRTd7Wjwq_pnw@mail.gmail.com> (raw) In-Reply-To: <97bc4380-1a2a-aec7-168e-04536fc74e37@loongson.cn> Hi Sui, On Sat, Jun 24, 2023 at 11:33 AM Sui Jingfeng <suijingfeng@loongson.cn> wrote: > I'm fine with this patch but I I don't see the benefit. > > This reply is more about my personal question. > > On 2023/6/22 17:21, Geert Uytterhoeven wrote: > > Replace the call to the legacy drm_handle_vblank() function with a call > > to the new drm_crtc_handle_vblank() helper. > > > > Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> > > Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn> > > --- > > drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c > > index c98e2bdd888c3274..6eaf2c5a104f451a 100644 > > --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c > > +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c > > @@ -86,7 +86,7 @@ static irqreturn_t shmob_drm_irq(int irq, void *arg) > > spin_unlock_irqrestore(&sdev->irq_lock, flags); > > > > if (status & LDINTR_VES) { > > - drm_handle_vblank(dev, 0); > > + drm_crtc_handle_vblank(&sdev->crtc.base); > > > After switching to drm_crtc_handle_vblank(), > > your driver need another deference to the pointer of 'struct drm_crtc' > to get the pointer of 'struct drm_device'; > > Plus another call to get the index(display pipe) of the CRTC by calling > drm_crtc_index(crtc). That is correct. > Consider that shmob-drm support only one display pipe, > > is it that the switching is less straight forward than the original > implement ? > > > ``` > > /** > * drm_crtc_handle_vblank - handle a vblank event > * @crtc: where this event occurred > * > * Drivers should call this routine in their vblank interrupt handlers to > * update the vblank counter and send any signals that may be pending. > * > * This is the native KMS version of drm_handle_vblank(). > * > * Note that for a given vblank counter value drm_crtc_handle_vblank() > * and drm_crtc_vblank_count() or drm_crtc_vblank_count_and_time() > * provide a barrier: Any writes done before calling > * drm_crtc_handle_vblank() will be visible to callers of the later > * functions, if the vblank count is the same or a later one. > * > * See also &drm_vblank_crtc.count. > * > * Returns: > * True if the event was successfully handled, false on failure. > */ > bool drm_crtc_handle_vblank(struct drm_crtc *crtc) > { > return drm_handle_vblank(crtc->dev, drm_crtc_index(crtc)); > } > > ``` > > Is it that drm_crtc_handle_vblank() function is preferred over > drm_handle_vblank() in the future? > > I'm fine with this question answered. I think the native KMS version is preferred over the legacy version, cfr. /** * drm_handle_vblank - handle a vblank event [...] * This is the legacy version of drm_crtc_handle_vblank(). */ bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe) Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
WARNING: multiple messages have this Message-ID (diff)
From: Geert Uytterhoeven <geert@linux-m68k.org> To: Sui Jingfeng <suijingfeng@loongson.cn> Cc: Magnus Damm <magnus.damm@gmail.com>, linux-kernel@vger.kernel.org, dri-devel@lists.freedesktop.org, linux-renesas-soc@vger.kernel.org, Kieran Bingham <kieran.bingham+renesas@ideasonboard.com>, Laurent Pinchart <laurent.pinchart@ideasonboard.com>, Thomas Zimmermann <tzimmermann@suse.de> Subject: Re: [28/39] drm: renesas: shmobile: Use drm_crtc_handle_vblank() Date: Sun, 25 Jun 2023 10:55:56 +0200 [thread overview] Message-ID: <CAMuHMdX8=16pRQr=2CouUWBUhD16Mkh3_WaNZmRTd7Wjwq_pnw@mail.gmail.com> (raw) In-Reply-To: <97bc4380-1a2a-aec7-168e-04536fc74e37@loongson.cn> Hi Sui, On Sat, Jun 24, 2023 at 11:33 AM Sui Jingfeng <suijingfeng@loongson.cn> wrote: > I'm fine with this patch but I I don't see the benefit. > > This reply is more about my personal question. > > On 2023/6/22 17:21, Geert Uytterhoeven wrote: > > Replace the call to the legacy drm_handle_vblank() function with a call > > to the new drm_crtc_handle_vblank() helper. > > > > Signed-off-by: Geert Uytterhoeven <geert+renesas@glider.be> > > Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > Reviewed-by: Sui Jingfeng <suijingfeng@loongson.cn> > > --- > > drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c | 2 +- > > 1 file changed, 1 insertion(+), 1 deletion(-) > > > > diff --git a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c > > index c98e2bdd888c3274..6eaf2c5a104f451a 100644 > > --- a/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c > > +++ b/drivers/gpu/drm/renesas/shmobile/shmob_drm_drv.c > > @@ -86,7 +86,7 @@ static irqreturn_t shmob_drm_irq(int irq, void *arg) > > spin_unlock_irqrestore(&sdev->irq_lock, flags); > > > > if (status & LDINTR_VES) { > > - drm_handle_vblank(dev, 0); > > + drm_crtc_handle_vblank(&sdev->crtc.base); > > > After switching to drm_crtc_handle_vblank(), > > your driver need another deference to the pointer of 'struct drm_crtc' > to get the pointer of 'struct drm_device'; > > Plus another call to get the index(display pipe) of the CRTC by calling > drm_crtc_index(crtc). That is correct. > Consider that shmob-drm support only one display pipe, > > is it that the switching is less straight forward than the original > implement ? > > > ``` > > /** > * drm_crtc_handle_vblank - handle a vblank event > * @crtc: where this event occurred > * > * Drivers should call this routine in their vblank interrupt handlers to > * update the vblank counter and send any signals that may be pending. > * > * This is the native KMS version of drm_handle_vblank(). > * > * Note that for a given vblank counter value drm_crtc_handle_vblank() > * and drm_crtc_vblank_count() or drm_crtc_vblank_count_and_time() > * provide a barrier: Any writes done before calling > * drm_crtc_handle_vblank() will be visible to callers of the later > * functions, if the vblank count is the same or a later one. > * > * See also &drm_vblank_crtc.count. > * > * Returns: > * True if the event was successfully handled, false on failure. > */ > bool drm_crtc_handle_vblank(struct drm_crtc *crtc) > { > return drm_handle_vblank(crtc->dev, drm_crtc_index(crtc)); > } > > ``` > > Is it that drm_crtc_handle_vblank() function is preferred over > drm_handle_vblank() in the future? > > I'm fine with this question answered. I think the native KMS version is preferred over the legacy version, cfr. /** * drm_handle_vblank - handle a vblank event [...] * This is the legacy version of drm_crtc_handle_vblank(). */ bool drm_handle_vblank(struct drm_device *dev, unsigned int pipe) Gr{oetje,eeting}s, Geert -- Geert Uytterhoeven -- There's lots of Linux beyond ia32 -- geert@linux-m68k.org In personal conversations with technical people, I call myself a hacker. But when I'm talking to journalists I just say "programmer" or something like that. -- Linus Torvalds
next prev parent reply other threads:[~2023-06-25 8:56 UTC|newest] Thread overview: 199+ messages / expand[flat|nested] mbox.gz Atom feed top 2023-06-22 9:21 [PATCH 00/39] drm: renesas: shmobile: Atomic conversion + DT support Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-22 9:21 ` [PATCH 01/39] dt-bindings: display: Add Renesas SH-Mobile LCDC bindings Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-22 14:52 ` Rob Herring 2023-06-22 14:52 ` Rob Herring 2023-07-17 13:57 ` Geert Uytterhoeven 2023-07-17 13:57 ` Geert Uytterhoeven 2023-06-23 14:43 ` Laurent Pinchart 2023-06-23 14:43 ` Laurent Pinchart 2023-06-23 15:19 ` Geert Uytterhoeven 2023-06-23 15:19 ` Geert Uytterhoeven 2023-06-23 15:33 ` Laurent Pinchart 2023-06-23 15:33 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 02/39] media: uapi: Add MEDIA_BUS_FMT_RGB666_2X9 variants Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 14:56 ` Laurent Pinchart 2023-06-23 14:56 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 03/39] drm: renesas: shmobile: Fix overlay plane disable Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 14:59 ` Laurent Pinchart 2023-06-23 14:59 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 04/39] drm: renesas: shmobile: Fix ARGB32 overlay format typo Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-22 10:11 ` Sergei Shtylyov 2023-06-22 10:11 ` Sergei Shtylyov 2023-06-23 14:58 ` Laurent Pinchart 2023-06-23 14:58 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 05/39] drm: renesas: shmobile: Correct encoder/connector types Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:03 ` Laurent Pinchart 2023-06-23 15:03 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 06/39] drm: renesas: shmobile: Add support for Runtime PM Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:07 ` Laurent Pinchart 2023-06-23 15:07 ` Laurent Pinchart 2023-06-23 15:11 ` Laurent Pinchart 2023-06-23 15:11 ` Laurent Pinchart 2023-06-23 15:22 ` Geert Uytterhoeven 2023-06-23 15:22 ` Geert Uytterhoeven 2023-06-23 15:34 ` Laurent Pinchart 2023-06-23 15:34 ` Laurent Pinchart 2023-06-23 17:41 ` Geert Uytterhoeven 2023-06-23 17:41 ` Geert Uytterhoeven 2023-06-23 17:52 ` Laurent Pinchart 2023-06-23 17:52 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 07/39] drm: renesas: shmobile: Restore indentation of shmob_drm_setup_clocks() Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:04 ` Laurent Pinchart 2023-06-23 15:04 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 08/39] drm: renesas: shmobile: Use %p4cc to print fourcc code Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:04 ` Laurent Pinchart 2023-06-23 15:04 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 09/39] drm: renesas: shmobile: Add missing YCbCr formats Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:13 ` Laurent Pinchart 2023-06-23 15:13 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 10/39] drm: renesas: shmobile: Improve shmob_drm_format_info table Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:30 ` Laurent Pinchart 2023-06-23 15:30 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 11/39] drm: renesas: shmobile: Remove backlight support Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:36 ` Laurent Pinchart 2023-06-23 15:36 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 12/39] drm: renesas: shmobile: Don't set display info width and height twice Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-28 1:46 ` [12/39] " Sui Jingfeng 2023-06-22 9:21 ` [PATCH 13/39] drm: renesas: shmobile: Rename input clocks Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-28 1:50 ` [13/39] " Sui Jingfeng 2023-06-22 9:21 ` [PATCH 14/39] drm: renesas: shmobile: Remove support for SYS panels Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-22 9:21 ` [PATCH 15/39] drm: renesas: shmobile: Improve error handling Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:41 ` Laurent Pinchart 2023-06-23 15:41 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 16/39] drm: renesas: shmobile: Convert to use devm_request_irq() Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:41 ` Laurent Pinchart 2023-06-23 15:41 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 17/39] drm: renesas: shmobile: Use drmm_universal_plane_alloc() Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:46 ` Laurent Pinchart 2023-06-23 15:46 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 18/39] drm: renesas: shmobile: Embed drm_device in shmob_drm_device Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:48 ` Laurent Pinchart 2023-06-23 15:48 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 19/39] drm: renesas: shmobile: Convert container helpers to static inline functions Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:49 ` Laurent Pinchart 2023-06-23 15:49 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 20/39] drm: renesas: shmobile: Replace .dev_private with container_of() Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:50 ` Laurent Pinchart 2023-06-23 15:50 ` Laurent Pinchart 2023-06-24 9:49 ` [20/39] " Sui Jingfeng 2023-06-22 9:21 ` [PATCH 21/39] drm: renesas: shmobile: Use struct videomode in platform data Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:53 ` Laurent Pinchart 2023-06-23 15:53 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 22/39] drm: renesas: shmobile: Use media bus formats " Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 15:54 ` Laurent Pinchart 2023-06-23 15:54 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 23/39] drm: renesas: shmobile: Move interface handling to connector setup Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 16:39 ` Laurent Pinchart 2023-06-23 16:39 ` Laurent Pinchart 2023-06-23 17:51 ` Geert Uytterhoeven 2023-06-23 17:51 ` Geert Uytterhoeven 2023-06-23 17:53 ` Laurent Pinchart 2023-06-23 17:53 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 24/39] drm: renesas: shmobile: Unify plane allocation Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 16:50 ` Laurent Pinchart 2023-06-23 16:50 ` Laurent Pinchart 2023-06-23 17:55 ` Geert Uytterhoeven 2023-06-23 17:55 ` Geert Uytterhoeven 2023-06-23 18:50 ` Laurent Pinchart 2023-06-23 18:50 ` Laurent Pinchart 2023-06-25 8:58 ` Geert Uytterhoeven 2023-06-25 8:58 ` Geert Uytterhoeven 2023-06-25 16:56 ` Laurent Pinchart 2023-06-25 16:56 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 25/39] drm: renesas: shmobile: Rename shmob_drm_crtc.crtc Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 16:51 ` Laurent Pinchart 2023-06-23 16:51 ` Laurent Pinchart 2023-06-27 14:38 ` [25/39] " Sui Jingfeng 2023-06-22 9:21 ` [PATCH 26/39] drm: renesas: shmobile: Rename shmob_drm_connector.connector Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 16:51 ` Laurent Pinchart 2023-06-23 16:51 ` Laurent Pinchart 2023-06-27 14:40 ` [26/39] " Sui Jingfeng 2023-06-22 9:21 ` [PATCH 27/39] drm: renesas: shmobile: Rename shmob_drm_plane.plane Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 16:52 ` Laurent Pinchart 2023-06-23 16:52 ` Laurent Pinchart 2023-06-27 14:40 ` [27/39] " Sui Jingfeng 2023-06-22 9:21 ` [PATCH 28/39] drm: renesas: shmobile: Use drm_crtc_handle_vblank() Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 16:53 ` Laurent Pinchart 2023-06-23 16:53 ` Laurent Pinchart 2023-06-24 9:33 ` [28/39] " Sui Jingfeng 2023-06-25 8:55 ` Geert Uytterhoeven [this message] 2023-06-25 8:55 ` Geert Uytterhoeven 2023-06-22 9:21 ` [PATCH 29/39] drm: renesas: shmobile: Move shmob_drm_crtc_finish_page_flip() Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 16:53 ` Laurent Pinchart 2023-06-23 16:53 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 30/39] drm: renesas: shmobile: Wait for page flip when turning CRTC off Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 17:08 ` Laurent Pinchart 2023-06-23 17:08 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 31/39] drm: renesas: shmobile: Turn vblank on/off when enabling/disabling CRTC Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 17:09 ` Laurent Pinchart 2023-06-23 17:09 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 32/39] drm: renesas: shmobile: Shutdown the display on remove Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 17:10 ` Laurent Pinchart 2023-06-23 17:10 ` Laurent Pinchart 2023-06-27 14:57 ` [32/39] " Sui Jingfeng 2023-07-05 10:29 ` Geert Uytterhoeven 2023-07-05 10:29 ` Geert Uytterhoeven 2023-07-06 3:51 ` suijingfeng 2023-06-22 9:21 ` [PATCH 33/39] drm: renesas: shmobile: Cleanup encoder Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 17:12 ` Laurent Pinchart 2023-06-23 17:12 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 34/39] drm: renesas: shmobile: Atomic conversion part 1 Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-22 9:21 ` [PATCH 35/39] drm: renesas: shmobile: Atomic conversion part 2 Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-22 9:21 ` [PATCH 36/39] drm: renesas: shmobile: Use suspend/resume helpers Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 17:14 ` Laurent Pinchart 2023-06-23 17:14 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 37/39] drm: renesas: shmobile: Remove internal CRTC state tracking Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 17:15 ` Laurent Pinchart 2023-06-23 17:15 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 38/39] drm: renesas: shmobile: Atomic conversion part 3 Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 17:18 ` Laurent Pinchart 2023-06-23 17:18 ` Laurent Pinchart 2023-06-22 9:21 ` [PATCH 39/39] drm: renesas: shmobile: Add DT support Geert Uytterhoeven 2023-06-22 9:21 ` Geert Uytterhoeven 2023-06-23 17:50 ` Laurent Pinchart 2023-06-23 17:50 ` Laurent Pinchart 2023-06-23 17:54 ` Sam Ravnborg 2023-06-23 17:54 ` Sam Ravnborg 2023-06-23 18:09 ` Geert Uytterhoeven 2023-06-23 18:09 ` Geert Uytterhoeven 2023-06-23 18:52 ` Laurent Pinchart 2023-06-23 18:52 ` Laurent Pinchart
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