On 2023-05-22 13:30:21, Jessica Zhang wrote: > Adjust the pclk rate to divide hdisplay by the compression ratio when DSC > is enabled. > > Signed-off-by: Jessica Zhang <quic_jessz...@quicinc.com>
As discussed previously, this patch would apply a lot more cleanly on top of: https://lore.kernel.org/linux-arm-msm/20230520200103.4019607-1-dmitry.barysh...@linaro.org/T/#u (This is the v2 that doesn't change the callback, but does change the code flow so that you have to *touch less lines* in this patch). - Marijn > --- > drivers/gpu/drm/msm/dsi/dsi_host.c | 23 +++++++++++++++++++---- > 1 file changed, 19 insertions(+), 4 deletions(-) > > diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c > b/drivers/gpu/drm/msm/dsi/dsi_host.c > index 18d38b90eb28..d04f8bbd707d 100644 > --- a/drivers/gpu/drm/msm/dsi/dsi_host.c > +++ b/drivers/gpu/drm/msm/dsi/dsi_host.c > @@ -561,7 +561,18 @@ void dsi_link_clk_disable_v2(struct msm_dsi_host > *msm_host) > clk_disable_unprepare(msm_host->byte_clk); > } > > -static unsigned long dsi_get_pclk_rate(const struct drm_display_mode *mode, > bool is_bonded_dsi) > +static unsigned long dsi_adjust_compressed_pclk(const struct > drm_display_mode *mode, > + const struct drm_dsc_config *dsc) > +{ > + int new_hdisplay = DIV_ROUND_UP(mode->hdisplay * > drm_dsc_get_bpp_int(dsc), > + dsc->bits_per_component * 3); > + > + return (new_hdisplay + (mode->htotal - mode->hdisplay)) > + * mode->vtotal * drm_mode_vrefresh(mode); > +} > + > +static unsigned long dsi_get_pclk_rate(const struct drm_display_mode *mode, > + const struct drm_dsc_config *dsc, bool is_bonded_dsi) > { > unsigned long pclk_rate; > > @@ -576,6 +587,10 @@ static unsigned long dsi_get_pclk_rate(const struct > drm_display_mode *mode, bool > if (is_bonded_dsi) > pclk_rate /= 2; > > + /* If DSC is enabled, divide hdisplay by compression ratio */ > + if (dsc) > + pclk_rate = dsi_adjust_compressed_pclk(mode, dsc); > + > return pclk_rate; > } > > @@ -585,7 +600,7 @@ unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host > *host, bool is_bonded_d > struct msm_dsi_host *msm_host = to_msm_dsi_host(host); > u8 lanes = msm_host->lanes; > u32 bpp = dsi_get_bpp(msm_host->format); > - unsigned long pclk_rate = dsi_get_pclk_rate(mode, is_bonded_dsi); > + unsigned long pclk_rate = dsi_get_pclk_rate(mode, msm_host->dsc, > is_bonded_dsi); > u64 pclk_bpp = (u64)pclk_rate * bpp; > > if (lanes == 0) { > @@ -604,7 +619,7 @@ unsigned long dsi_byte_clk_get_rate(struct mipi_dsi_host > *host, bool is_bonded_d > > static void dsi_calc_pclk(struct msm_dsi_host *msm_host, bool is_bonded_dsi) > { > - msm_host->pixel_clk_rate = dsi_get_pclk_rate(msm_host->mode, > is_bonded_dsi); > + msm_host->pixel_clk_rate = dsi_get_pclk_rate(msm_host->mode, > msm_host->dsc, is_bonded_dsi); > msm_host->byte_clk_rate = dsi_byte_clk_get_rate(&msm_host->base, > is_bonded_dsi, > msm_host->mode); > > @@ -634,7 +649,7 @@ int dsi_calc_clk_rate_v2(struct msm_dsi_host *msm_host, > bool is_bonded_dsi) > > dsi_calc_pclk(msm_host, is_bonded_dsi); > > - pclk_bpp = (u64)dsi_get_pclk_rate(msm_host->mode, is_bonded_dsi) * bpp; > + pclk_bpp = (u64)dsi_get_pclk_rate(msm_host->mode, msm_host->dsc, > is_bonded_dsi) * bpp; > do_div(pclk_bpp, 8); > msm_host->src_clk_rate = pclk_bpp; > > > -- > 2.40.1 >
