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Merge "disp: msm: dp: Ensure peak pxl rate does not exceed maximum supported by sink"

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This commit is contained in:
qctecmdr
2019-06-19 05:21:38 -07:00
committed by Gerrit - the friendly Code Review server
parent f49f2c2153 a9028ef4cf
commit 3c4d5f3557
1 changed files with 43 additions and 3 deletions
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46
msm/dp/dp_panel.c
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@@ -1522,6 +1522,11 @@ struct dp_dsc_slices_per_line {
u8 num_slices;
};
struct dp_dsc_peak_throughput {
u32 index;
u32 peak_throughput;
};
struct dp_dsc_slices_per_line slice_per_line_tbl[] = {
{0, 340, 1 },
{340, 680, 2 },
@@ -1533,6 +1538,24 @@ struct dp_dsc_slices_per_line slice_per_line_tbl[] = {
{8000, 9600, 24 }
};
const struct dp_dsc_peak_throughput peak_throughput_mode_0_tbl[] = {
{0, 0},
{1, 340},
{2, 400},
{3, 450},
{4, 500},
{5, 550},
{6, 600},
{7, 650},
{8, 700},
{9, 750},
{10, 800},
{11, 850},
{12, 900},
{13, 950},
{14, 1000},
};
static int dp_panel_dsc_prepare_basic_params(
struct msm_compression_info *comp_info,
const struct dp_display_mode *dp_mode,
@@ -1540,9 +1563,13 @@ static int dp_panel_dsc_prepare_basic_params(
{
int i;
struct dp_dsc_slices_per_line *rec;
int slice_width;
const struct dp_dsc_peak_throughput *tput;
u32 slice_width;
u32 ppr = dp_mode->timing.pixel_clk_khz/1000;
int max_slice_width;
u32 max_slice_width;
u32 ppr_max_index;
u32 peak_throughput;
u32 ppr_per_slice;
comp_info->dsc_info.slice_per_pkt = 0;
for (i = 0; i < ARRAY_SIZE(slice_per_line_tbl); i++) {
@@ -1557,11 +1584,23 @@ static int dp_panel_dsc_prepare_basic_params(
if (comp_info->dsc_info.slice_per_pkt == 0)
return -EINVAL;
ppr_max_index = dp_panel->dsc_dpcd[11] &= 0xf;
if (!ppr_max_index || ppr_max_index >= 15) {
pr_debug("Throughput mode 0 not supported");
return -EINVAL;
}
tput = &peak_throughput_mode_0_tbl[ppr_max_index];
peak_throughput = tput->peak_throughput;
max_slice_width = dp_panel->dsc_dpcd[12] * 320;
slice_width = (dp_mode->timing.h_active /
comp_info->dsc_info.slice_per_pkt);
while (slice_width >= max_slice_width) {
ppr_per_slice = ppr/comp_info->dsc_info.slice_per_pkt;
while (slice_width >= max_slice_width ||
ppr_per_slice > peak_throughput) {
if (i == ARRAY_SIZE(slice_per_line_tbl))
return -EINVAL;
@@ -1569,6 +1608,7 @@ static int dp_panel_dsc_prepare_basic_params(
comp_info->dsc_info.slice_per_pkt = rec->num_slices;
slice_width = (dp_mode->timing.h_active /
comp_info->dsc_info.slice_per_pkt);
ppr_per_slice = ppr/comp_info->dsc_info.slice_per_pkt;
i++;
}