Adjust the pclk rate to divide hdisplay by the compression ratio when DSC is enabled. Signed-off-by: Jessica Zhang <quic_jesszhan@xxxxxxxxxxx> --- drivers/gpu/drm/msm/dsi/dsi_host.c | 21 ++++++++++++++++++--- 1 file changed, 18 insertions(+), 3 deletions(-) diff --git a/drivers/gpu/drm/msm/dsi/dsi_host.c b/drivers/gpu/drm/msm/dsi/dsi_host.c index a448931af804..88f370dd2ea1 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); unsigned long pclk_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); -- 2.40.1