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Message-ID: <b2a7d92a-7e9d-14e2-387f-beaf589f360a@baylibre.com>
Date: Tue, 12 Oct 2021 10:32:38 +0200
From: Neil Armstrong <narmstrong@...libre.com>
To: Tomi Valkeinen <tomi.valkeinen@...asonboard.com>
Cc: linux-omap@...r.kernel.org, dri-devel@...ts.freedesktop.org,
linux-kernel@...r.kernel.org, khilman@...libre.com,
Benoit Parrot <bparrot@...com>
Subject: Re: [PATCH v5 1/8] drm/omap: Add ability to check if requested plane
modes can be supported
On 12/10/2021 09:21, Tomi Valkeinen wrote:
> Hi,
>
> On 23/09/2021 10:06, Neil Armstrong wrote:
>> From: Benoit Parrot <bparrot@...com>
>>
>> We currently assume that an overlay has the same maximum width and
>> maximum height as the overlay manager. This assumption is incorrect. On
>> some variants the overlay manager maximum width is twice the maximum
>> width that the overlay can handle. We need to add the appropriate data
>> per variant as well as export a helper function to retrieve the data so
>> check can be made dynamically in omap_plane_atomic_check().
>>
>> Signed-off-by: Benoit Parrot <bparrot@...com>
>> Signed-off-by: Neil Armstrong <narmstrong@...libre.com>
>> ---
>> drivers/gpu/drm/omapdrm/dss/dispc.c | 22 ++++++++++++++++++++++
>> drivers/gpu/drm/omapdrm/dss/dss.h | 2 ++
>> drivers/gpu/drm/omapdrm/omap_plane.c | 14 ++++++++++++++
>> 3 files changed, 38 insertions(+)
>>
>> diff --git a/drivers/gpu/drm/omapdrm/dss/dispc.c b/drivers/gpu/drm/omapdrm/dss/dispc.c
>> index 3c4a4991e45a..bdecec8f4d88 100644
>> --- a/drivers/gpu/drm/omapdrm/dss/dispc.c
>> +++ b/drivers/gpu/drm/omapdrm/dss/dispc.c
>> @@ -92,6 +92,8 @@ struct dispc_features {
>> u8 mgr_height_start;
>> u16 mgr_width_max;
>> u16 mgr_height_max;
>> + u16 ovl_width_max;
>> + u16 ovl_height_max;
>> unsigned long max_lcd_pclk;
>> unsigned long max_tv_pclk;
>> unsigned int max_downscale;
>> @@ -2599,6 +2601,12 @@ static int dispc_ovl_calc_scaling(struct dispc_device *dispc,
>> return 0;
>> }
>> +void dispc_ovl_get_max_size(struct dispc_device *dispc, u16 *width, u16 *height)
>> +{
>> + *width = dispc->feat->ovl_width_max;
>> + *height = dispc->feat->ovl_height_max;
>> +}
>> +
>> static int dispc_ovl_setup_common(struct dispc_device *dispc,
>> enum omap_plane_id plane,
>> enum omap_overlay_caps caps,
>> @@ -4240,6 +4248,8 @@ static const struct dispc_features omap24xx_dispc_feats = {
>> .mgr_height_start = 26,
>> .mgr_width_max = 2048,
>> .mgr_height_max = 2048,
>> + .ovl_width_max = 2048,
>> + .ovl_height_max = 2048,
>> .max_lcd_pclk = 66500000,
>> .max_downscale = 2,
>> /*
>> @@ -4278,6 +4288,8 @@ static const struct dispc_features omap34xx_rev1_0_dispc_feats = {
>> .mgr_height_start = 26,
>> .mgr_width_max = 2048,
>> .mgr_height_max = 2048,
>> + .ovl_width_max = 2048,
>> + .ovl_height_max = 2048,
>> .max_lcd_pclk = 173000000,
>> .max_tv_pclk = 59000000,
>> .max_downscale = 4,
>> @@ -4313,6 +4325,8 @@ static const struct dispc_features omap34xx_rev3_0_dispc_feats = {
>> .mgr_height_start = 26,
>> .mgr_width_max = 2048,
>> .mgr_height_max = 2048,
>> + .ovl_width_max = 2048,
>> + .ovl_height_max = 2048,
>> .max_lcd_pclk = 173000000,
>> .max_tv_pclk = 59000000,
>> .max_downscale = 4,
>> @@ -4348,6 +4362,8 @@ static const struct dispc_features omap36xx_dispc_feats = {
>> .mgr_height_start = 26,
>> .mgr_width_max = 2048,
>> .mgr_height_max = 2048,
>> + .ovl_width_max = 2048,
>> + .ovl_height_max = 2048,
>> .max_lcd_pclk = 173000000,
>> .max_tv_pclk = 59000000,
>> .max_downscale = 4,
>> @@ -4383,6 +4399,8 @@ static const struct dispc_features am43xx_dispc_feats = {
>> .mgr_height_start = 26,
>> .mgr_width_max = 2048,
>> .mgr_height_max = 2048,
>> + .ovl_width_max = 2048,
>> + .ovl_height_max = 2048,
>> .max_lcd_pclk = 173000000,
>> .max_tv_pclk = 59000000,
>> .max_downscale = 4,
>> @@ -4418,6 +4436,8 @@ static const struct dispc_features omap44xx_dispc_feats = {
>> .mgr_height_start = 26,
>> .mgr_width_max = 2048,
>> .mgr_height_max = 2048,
>> + .ovl_width_max = 2048,
>> + .ovl_height_max = 2048,
>> .max_lcd_pclk = 170000000,
>> .max_tv_pclk = 185625000,
>> .max_downscale = 4,
>> @@ -4457,6 +4477,8 @@ static const struct dispc_features omap54xx_dispc_feats = {
>> .mgr_height_start = 27,
>> .mgr_width_max = 4096,
>> .mgr_height_max = 4096,
>> + .ovl_width_max = 2048,
>> + .ovl_height_max = 4096,
>> .max_lcd_pclk = 170000000,
>> .max_tv_pclk = 192000000,
>> .max_downscale = 4,
>> diff --git a/drivers/gpu/drm/omapdrm/dss/dss.h b/drivers/gpu/drm/omapdrm/dss/dss.h
>> index a547527bb2f3..14c39f7c3988 100644
>> --- a/drivers/gpu/drm/omapdrm/dss/dss.h
>> +++ b/drivers/gpu/drm/omapdrm/dss/dss.h
>> @@ -397,6 +397,8 @@ int dispc_get_num_mgrs(struct dispc_device *dispc);
>> const u32 *dispc_ovl_get_color_modes(struct dispc_device *dispc,
>> enum omap_plane_id plane);
>> +void dispc_ovl_get_max_size(struct dispc_device *dispc, u16 *width, u16 *height);
>> +
>> u32 dispc_read_irqstatus(struct dispc_device *dispc);
>> void dispc_clear_irqstatus(struct dispc_device *dispc, u32 mask);
>> void dispc_write_irqenable(struct dispc_device *dispc, u32 mask);
>> diff --git a/drivers/gpu/drm/omapdrm/omap_plane.c b/drivers/gpu/drm/omapdrm/omap_plane.c
>> index 512af976b7e9..d0a67b7ed1a0 100644
>> --- a/drivers/gpu/drm/omapdrm/omap_plane.c
>> +++ b/drivers/gpu/drm/omapdrm/omap_plane.c
>> @@ -109,11 +109,18 @@ static int omap_plane_atomic_check(struct drm_plane *plane,
>> {
>> struct drm_plane_state *new_plane_state = drm_atomic_get_new_plane_state(state,
>> plane);
>> + struct omap_drm_private *priv = plane->dev->dev_private;
>> struct drm_crtc_state *crtc_state;
>> + u16 width, height;
>> + u32 width_fp, height_fp;
>
> I think naming these max_w/max_width etc. would be better.
Ack
Neil
>
> Tomi
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