From: Yannick FERTRE <yannick.fertre@st.com>
To: Marek Vasut <marex@denx.de>,
"dri-devel@lists.freedesktop.org"
<dri-devel@lists.freedesktop.org>
Cc: Alexandre TORGUE <alexandre.torgue@st.com>,
Antonio BORNEO <antonio.borneo@st.com>,
Vincent ABRIOU <vincent.abriou@st.com>,
Philippe CORNU <philippe.cornu@st.com>,
Maxime Coquelin <mcoquelin.stm32@gmail.com>,
Sam Ravnborg <sam@ravnborg.org>,
"linux-stm32@st-md-mailman.stormreply.com"
<linux-stm32@st-md-mailman.stormreply.com>,
"linux-arm-kernel@lists.infradead.org"
<linux-arm-kernel@lists.infradead.org>,
Benjamin Gaignard <benjamin.gaignard@st.com>
Subject: Re: [PATCH] drm/stm: Remove usage of drm_display_mode_to_videomode()
Date: Thu, 7 Jan 2021 08:27:01 +0000 [thread overview]
Message-ID: <0ab4ee45-4437-3b02-cf63-0e3b1b53920f@st.com> (raw)
In-Reply-To: <20201224062030.92287-1-marex@denx.de>
Hi Marek,
thanks for the patch. It works fine on stm32mp1 eval board with bridge
DSI & DPI panel.
Tested-by: Yannick Fertré <yannick.fertre@st.com>
Best regards
On 12/24/20 7:20 AM, Marek Vasut wrote:
> There is not much value in the extra conversion step, the calculations
> required for the LTDC IP are different than what is used in the
> drm_display_mode_to_videomode(), so just do the right ones in the LTDC
> driver right away.
>
> Signed-off-by: Marek Vasut <marex@denx.de>
> Cc: Alexandre Torgue <alexandre.torgue@st.com>
> Cc: Antonio Borneo <antonio.borneo@st.com>
> Cc: Benjamin Gaignard <benjamin.gaignard@st.com>
> Cc: Maxime Coquelin <mcoquelin.stm32@gmail.com>
> Cc: Philippe Cornu <philippe.cornu@st.com>
> Cc: Sam Ravnborg <sam@ravnborg.org>
> Cc: Vincent Abriou <vincent.abriou@st.com>
> Cc: Yannick Fertre <yannick.fertre@st.com>
> Cc: linux-arm-kernel@lists.infradead.org
> Cc: linux-stm32@st-md-mailman.stormreply.com
> To: dri-devel@lists.freedesktop.org
> ---
> drivers/gpu/drm/stm/ltdc.c | 33 +++++++++++++++++----------------
> 1 file changed, 17 insertions(+), 16 deletions(-)
>
> diff --git a/drivers/gpu/drm/stm/ltdc.c b/drivers/gpu/drm/stm/ltdc.c
> index 22c7e9fa5ab7..e8fc8fc50d94 100644
> --- a/drivers/gpu/drm/stm/ltdc.c
> +++ b/drivers/gpu/drm/stm/ltdc.c
> @@ -545,7 +545,6 @@ static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc)
> struct ltdc_device *ldev = crtc_to_ltdc(crtc);
> struct drm_device *ddev = crtc->dev;
> struct drm_display_mode *mode = &crtc->state->adjusted_mode;
> - struct videomode vm;
> u32 bus_flags = 0;
> u32 hsync, vsync, accum_hbp, accum_vbp, accum_act_w, accum_act_h;
> u32 total_width, total_height;
> @@ -565,31 +564,33 @@ static void ltdc_crtc_mode_set_nofb(struct drm_crtc *crtc)
> }
> }
>
> - drm_display_mode_to_videomode(mode, &vm);
> -
> DRM_DEBUG_DRIVER("CRTC:%d mode:%s\n", crtc->base.id, mode->name);
> - DRM_DEBUG_DRIVER("Video mode: %dx%d", vm.hactive, vm.vactive);
> + DRM_DEBUG_DRIVER("Video mode: %dx%d", mode->hdisplay, mode->vdisplay);
> DRM_DEBUG_DRIVER(" hfp %d hbp %d hsl %d vfp %d vbp %d vsl %d\n",
> - vm.hfront_porch, vm.hback_porch, vm.hsync_len,
> - vm.vfront_porch, vm.vback_porch, vm.vsync_len);
> + mode->hsync_start - mode->hdisplay,
> + mode->htotal - mode->hsync_end,
> + mode->hsync_end - mode->hsync_start,
> + mode->vsync_start - mode->vdisplay,
> + mode->vtotal - mode->vsync_end,
> + mode->vsync_end - mode->vsync_start);
>
> /* Convert video timings to ltdc timings */
> - hsync = vm.hsync_len - 1;
> - vsync = vm.vsync_len - 1;
> - accum_hbp = hsync + vm.hback_porch;
> - accum_vbp = vsync + vm.vback_porch;
> - accum_act_w = accum_hbp + vm.hactive;
> - accum_act_h = accum_vbp + vm.vactive;
> - total_width = accum_act_w + vm.hfront_porch;
> - total_height = accum_act_h + vm.vfront_porch;
> + hsync = mode->hsync_end - mode->hsync_start - 1;
> + vsync = mode->vsync_end - mode->vsync_start - 1;
> + accum_hbp = mode->htotal - mode->hsync_start - 1;
> + accum_vbp = mode->vtotal - mode->vsync_start - 1;
> + accum_act_w = accum_hbp + mode->hdisplay;
> + accum_act_h = accum_vbp + mode->vdisplay;
> + total_width = mode->htotal - 1;
> + total_height = mode->vtotal - 1;
>
> /* Configures the HS, VS, DE and PC polarities. Default Active Low */
> val = 0;
>
> - if (vm.flags & DISPLAY_FLAGS_HSYNC_HIGH)
> + if (mode->flags & DRM_MODE_FLAG_PHSYNC)
> val |= GCR_HSPOL;
>
> - if (vm.flags & DISPLAY_FLAGS_VSYNC_HIGH)
> + if (mode->flags & DRM_MODE_FLAG_PVSYNC)
> val |= GCR_VSPOL;
>
> if (bus_flags & DRM_BUS_FLAG_DE_LOW)
>
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next prev parent reply other threads:[~2021-01-07 8:54 UTC|newest]
Thread overview: 7+ messages / expand[flat|nested] mbox.gz Atom feed top
2020-12-24 6:20 [PATCH] drm/stm: Remove usage of drm_display_mode_to_videomode() Marek Vasut
2021-01-07 8:27 ` Yannick FERTRE [this message]
2021-05-28 8:05 Yannick Fertre
2021-05-28 14:01 ` yannick Fertre
2021-06-01 10:19 ` Philippe CORNU
2021-06-07 17:24 Marek Vasut
2021-06-08 16:56 ` Philippe CORNU
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