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disp: msm: add support for variable compression ratios

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Currently the compression ratio is hard-coded to either 2:1 or
3:1 in several places. This is not sufficient for new compression
algorithms as they can support higher compression ratios.

Add support for calculating the compression ratios from the source
and target bpp thereby eliminating hard-coding.

Change-Id: I6383f3d0c781193d0a9ed74df5a95d8e856edb3d
Signed-off-by: Abhinav Kumar <abhinavk@codeaurora.org>
This commit is contained in:
Abhinav Kumar
2019-11-14 19:17:52 -08:00
committed by Gerrit - the friendly Code Review server
parent 27844b7b60
commit e3f23771ba
5 changed files with 49 additions and 34 deletions
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18
msm/dsi/dsi_drm.c
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@@ -472,6 +472,8 @@ int dsi_conn_get_mode_info(struct drm_connector *connector,
{
struct dsi_display_mode dsi_mode;
struct dsi_mode_info *timing;
int chroma_format;
int src_bpp, tar_bpp;
if (!drm_mode || !mode_info)
return -EINVAL;
@@ -498,17 +500,25 @@ int dsi_conn_get_mode_info(struct drm_connector *connector,
mode_info->comp_info.comp_type = MSM_DISPLAY_COMPRESSION_NONE;
if (dsi_mode.priv_info->dsc_enabled) {
chroma_format = dsi_mode.priv_info->dsc.chroma_format;
mode_info->comp_info.comp_type = MSM_DISPLAY_COMPRESSION_DSC;
memcpy(&mode_info->comp_info.dsc_info, &dsi_mode.priv_info->dsc,
sizeof(dsi_mode.priv_info->dsc));
mode_info->comp_info.comp_ratio =
MSM_DISPLAY_COMPRESSION_RATIO_3_TO_1;
tar_bpp = dsi_mode.priv_info->dsc.config.bits_per_pixel >> 4;
src_bpp = msm_get_src_bpc(chroma_format,
dsi_mode.priv_info->dsc.config.bits_per_component);
mode_info->comp_info.comp_ratio = mult_frac(1, src_bpp,
tar_bpp);
} else if (dsi_mode.priv_info->vdc_enabled) {
chroma_format = dsi_mode.priv_info->vdc.chroma_format;
mode_info->comp_info.comp_type = MSM_DISPLAY_COMPRESSION_VDC;
memcpy(&mode_info->comp_info.vdc_info, &dsi_mode.priv_info->vdc,
sizeof(dsi_mode.priv_info->vdc));
mode_info->comp_info.comp_ratio =
MSM_DISPLAY_COMPRESSION_RATIO_4_TO_1;
tar_bpp = dsi_mode.priv_info->vdc.bits_per_pixel >> 4;
src_bpp = msm_get_src_bpc(chroma_format,
dsi_mode.priv_info->vdc.bits_per_component);
mode_info->comp_info.comp_ratio = mult_frac(1, src_bpp,
tar_bpp);
}
if (dsi_mode.priv_info->roi_caps.enabled) {