| Message ID | 20230813180512.307418-4-biju.das.jz@bp.renesas.com (mailing list archive) |
|---|---|
| State | New, archived |
| Headers | show |
| Series | ADV7511 driver enhancements | expand |
Hi Biju, Thank you for the patch. On Sun, Aug 13, 2023 at 07:05:08PM +0100, Biju Das wrote: > The ADV7533 supports a maximum lane clock of 800MHz whereas it is 891MHz > for ADV7535. Add max_lane_freq variable to struct adv7511_chip_info to > handle this difference. > > While at it, drop the unused local variable max_lane_freq. > > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> > --- > drivers/gpu/drm/bridge/adv7511/adv7511.h | 1 + > drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 ++++-- > drivers/gpu/drm/bridge/adv7511/adv7533.c | 5 +---- > 3 files changed, 6 insertions(+), 6 deletions(-) > > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h > index f8190442ffca..0e2c721a856f 100644 > --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h > +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h > @@ -336,6 +336,7 @@ enum adv7511_type { > struct adv7511_chip_info { > enum adv7511_type type; > unsigned long max_mode_clock; > + unsigned long max_lane_freq; Same comment as for patch 2/7, you could name the field max_lane_freq_khz. An unsigned int may be enough too if the calculation below doesn't overflow. Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > }; > > struct adv7511 { > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c > index 193b2d5bc7e6..29e087e6d721 100644 > --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c > +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c > @@ -1372,12 +1372,14 @@ static const struct adv7511_chip_info adv7511_chip_info = { > > static const struct adv7511_chip_info adv7533_chip_info = { > .type = ADV7533, > - .max_mode_clock = 80000 > + .max_mode_clock = 80000, > + .max_lane_freq = 800000, > }; > > static const struct adv7511_chip_info adv7535_chip_info = { > .type = ADV7535, > - .max_mode_clock = 148500 > + .max_mode_clock = 148500, > + .max_lane_freq = 891000, > }; > > static const struct i2c_device_id adv7511_i2c_ids[] = { > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c > index e92b27e0afd1..c1e744d4f2b1 100644 > --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c > +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c > @@ -103,7 +103,6 @@ void adv7533_dsi_power_off(struct adv7511 *adv) > enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv, > const struct drm_display_mode *mode) > { > - unsigned long max_lane_freq; > struct mipi_dsi_device *dsi = adv->dsi; > u8 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); > > @@ -112,9 +111,7 @@ enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv, > return MODE_CLOCK_HIGH; > > /* Check max clock for each lane */ > - max_lane_freq = (adv->info->type == ADV7533 ? 800000 : 891000); > - > - if (mode->clock * bpp > max_lane_freq * adv->num_dsi_lanes) > + if (mode->clock * bpp > adv->info->max_lane_freq * adv->num_dsi_lanes) > return MODE_CLOCK_HIGH; > > return MODE_OK;
Hi Laurent, > Subject: Re: [PATCH 3/7] drm: adv7511: Add max_lane_freq variable to struct > adv7511_chip_info > > Hi Biju, > > Thank you for the patch. > > On Sun, Aug 13, 2023 at 07:05:08PM +0100, Biju Das wrote: > > The ADV7533 supports a maximum lane clock of 800MHz whereas it is > > 891MHz for ADV7535. Add max_lane_freq variable to struct > > adv7511_chip_info to handle this difference. > > > > While at it, drop the unused local variable max_lane_freq. > > > > Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> > > --- > > drivers/gpu/drm/bridge/adv7511/adv7511.h | 1 + > > drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 ++++-- > > drivers/gpu/drm/bridge/adv7511/adv7533.c | 5 +---- > > 3 files changed, 6 insertions(+), 6 deletions(-) > > > > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h > > b/drivers/gpu/drm/bridge/adv7511/adv7511.h > > index f8190442ffca..0e2c721a856f 100644 > > --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h > > +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h > > @@ -336,6 +336,7 @@ enum adv7511_type { struct adv7511_chip_info { > > enum adv7511_type type; > > unsigned long max_mode_clock; > > + unsigned long max_lane_freq; > > Same comment as for patch 2/7, you could name the field max_lane_freq_khz. > An unsigned int may be enough too if the calculation below doesn't > overflow. Agreed. 2 power 32 = 4,294,967,295 is large value compared to below calculation to trigger an overflow. Cheers, Biju > > Reviewed-by: Laurent Pinchart <laurent.pinchart+renesas@ideasonboard.com> > > > }; > > > > struct adv7511 { > > diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c > > b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c > > index 193b2d5bc7e6..29e087e6d721 100644 > > --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c > > +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c > > @@ -1372,12 +1372,14 @@ static const struct adv7511_chip_info > > adv7511_chip_info = { > > > > static const struct adv7511_chip_info adv7533_chip_info = { > > .type = ADV7533, > > - .max_mode_clock = 80000 > > + .max_mode_clock = 80000, > > + .max_lane_freq = 800000, > > }; > > > > static const struct adv7511_chip_info adv7535_chip_info = { > > .type = ADV7535, > > - .max_mode_clock = 148500 > > + .max_mode_clock = 148500, > > + .max_lane_freq = 891000, > > }; > > > > static const struct i2c_device_id adv7511_i2c_ids[] = { diff --git > > a/drivers/gpu/drm/bridge/adv7511/adv7533.c > > b/drivers/gpu/drm/bridge/adv7511/adv7533.c > > index e92b27e0afd1..c1e744d4f2b1 100644 > > --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c > > +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c > > @@ -103,7 +103,6 @@ void adv7533_dsi_power_off(struct adv7511 *adv) > > enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv, > > const struct drm_display_mode *mode) { > > - unsigned long max_lane_freq; > > struct mipi_dsi_device *dsi = adv->dsi; > > u8 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); > > > > @@ -112,9 +111,7 @@ enum drm_mode_status adv7533_mode_valid(struct > adv7511 *adv, > > return MODE_CLOCK_HIGH; > > > > /* Check max clock for each lane */ > > - max_lane_freq = (adv->info->type == ADV7533 ? 800000 : 891000); > > - > > - if (mode->clock * bpp > max_lane_freq * adv->num_dsi_lanes) > > + if (mode->clock * bpp > adv->info->max_lane_freq * > > +adv->num_dsi_lanes) > > return MODE_CLOCK_HIGH; > > > > return MODE_OK; > > -- > Regards, > > Laurent Pinchart
diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511.h b/drivers/gpu/drm/bridge/adv7511/adv7511.h index f8190442ffca..0e2c721a856f 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511.h +++ b/drivers/gpu/drm/bridge/adv7511/adv7511.h @@ -336,6 +336,7 @@ enum adv7511_type { struct adv7511_chip_info { enum adv7511_type type; unsigned long max_mode_clock; + unsigned long max_lane_freq; }; struct adv7511 { diff --git a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c index 193b2d5bc7e6..29e087e6d721 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7511_drv.c @@ -1372,12 +1372,14 @@ static const struct adv7511_chip_info adv7511_chip_info = { static const struct adv7511_chip_info adv7533_chip_info = { .type = ADV7533, - .max_mode_clock = 80000 + .max_mode_clock = 80000, + .max_lane_freq = 800000, }; static const struct adv7511_chip_info adv7535_chip_info = { .type = ADV7535, - .max_mode_clock = 148500 + .max_mode_clock = 148500, + .max_lane_freq = 891000, }; static const struct i2c_device_id adv7511_i2c_ids[] = { diff --git a/drivers/gpu/drm/bridge/adv7511/adv7533.c b/drivers/gpu/drm/bridge/adv7511/adv7533.c index e92b27e0afd1..c1e744d4f2b1 100644 --- a/drivers/gpu/drm/bridge/adv7511/adv7533.c +++ b/drivers/gpu/drm/bridge/adv7511/adv7533.c @@ -103,7 +103,6 @@ void adv7533_dsi_power_off(struct adv7511 *adv) enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv, const struct drm_display_mode *mode) { - unsigned long max_lane_freq; struct mipi_dsi_device *dsi = adv->dsi; u8 bpp = mipi_dsi_pixel_format_to_bpp(dsi->format); @@ -112,9 +111,7 @@ enum drm_mode_status adv7533_mode_valid(struct adv7511 *adv, return MODE_CLOCK_HIGH; /* Check max clock for each lane */ - max_lane_freq = (adv->info->type == ADV7533 ? 800000 : 891000); - - if (mode->clock * bpp > max_lane_freq * adv->num_dsi_lanes) + if (mode->clock * bpp > adv->info->max_lane_freq * adv->num_dsi_lanes) return MODE_CLOCK_HIGH; return MODE_OK;
The ADV7533 supports a maximum lane clock of 800MHz whereas it is 891MHz for ADV7535. Add max_lane_freq variable to struct adv7511_chip_info to handle this difference. While at it, drop the unused local variable max_lane_freq. Signed-off-by: Biju Das <biju.das.jz@bp.renesas.com> --- drivers/gpu/drm/bridge/adv7511/adv7511.h | 1 + drivers/gpu/drm/bridge/adv7511/adv7511_drv.c | 6 ++++-- drivers/gpu/drm/bridge/adv7511/adv7533.c | 5 +---- 3 files changed, 6 insertions(+), 6 deletions(-)