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| author |   Rex-BC Chen <rex-bc.chen@mediatek.com> | 2021-03-18 13:40:55 +0800 |
|---|---|---|
| committer |   Chun-Kuang Hu <chunkuang.hu@kernel.org> | 2021-03-20 14:59:06 +0800 |
| commit | 44b07120291c4b7a6722ccb7149f6b9d938cf5a2 (patch) | |
| tree | 0ed866ddeb463f8d0712bc47d51d25e7ca5da2df /drivers/gpu/drm/mediatek/mtk_dpi.c | |
| parent | drm/mediatek: cec: Delete redundant printing of return value (diff) | |
| download | linux-dev-44b07120291c4b7a6722ccb7149f6b9d938cf5a2.tar.xz linux-dev-44b07120291c4b7a6722ccb7149f6b9d938cf5a2.zip | |
drm/mediatek: dpi: Add check for max clock rate in mode_valid
Add per-platform max clock rate check in mtk_dpi_bridge_mode_valid.
Signed-off-by: Pi-Hsun Shih <pihsun@chromium.org>
Signed-off-by: Rex-BC Chen <rex-bc.chen@mediatek.com>
Signed-off-by: Jitao Shi <jitao.shi@mediatek.com>
Signed-off-by: Chun-Kuang Hu <chunkuang.hu@kernel.org>
Diffstat (limited to 'drivers/gpu/drm/mediatek/mtk_dpi.c')
| -rw-r--r-- | drivers/gpu/drm/mediatek/mtk_dpi.c | 18 |
1 files changed, 18 insertions, 0 deletions
diff --git a/drivers/gpu/drm/mediatek/mtk_dpi.c b/drivers/gpu/drm/mediatek/mtk_dpi.c index 0ac49624b5dc..07afbdd19ab1 100644 --- a/drivers/gpu/drm/mediatek/mtk_dpi.c +++ b/drivers/gpu/drm/mediatek/mtk_dpi.c @@ -120,6 +120,7 @@ struct mtk_dpi_yc_limit { struct mtk_dpi_conf { unsigned int (*cal_factor)(int clock); u32 reg_h_fre_con; + u32 max_clock_khz; bool edge_sel_en; }; @@ -557,9 +558,23 @@ static void mtk_dpi_bridge_enable(struct drm_bridge *bridge) mtk_dpi_set_display_mode(dpi, &dpi->mode); } +static enum drm_mode_status +mtk_dpi_bridge_mode_valid(struct drm_bridge *bridge, + const struct drm_display_info *info, + const struct drm_display_mode *mode) +{ + struct mtk_dpi *dpi = bridge_to_dpi(bridge); + + if (mode->clock > dpi->conf->max_clock_khz) + return MODE_CLOCK_HIGH; + + return MODE_OK; +} + static const struct drm_bridge_funcs mtk_dpi_bridge_funcs = { .attach = mtk_dpi_bridge_attach, .mode_set = mtk_dpi_bridge_mode_set, + .mode_valid = mtk_dpi_bridge_mode_valid, .disable = mtk_dpi_bridge_disable, .enable = mtk_dpi_bridge_enable, }; @@ -668,17 +683,20 @@ static unsigned int mt8183_calculate_factor(int clock) static const struct mtk_dpi_conf mt8173_conf = { .cal_factor = mt8173_calculate_factor, .reg_h_fre_con = 0xe0, + .max_clock_khz = 300000, }; static const struct mtk_dpi_conf mt2701_conf = { .cal_factor = mt2701_calculate_factor, .reg_h_fre_con = 0xb0, .edge_sel_en = true, + .max_clock_khz = 150000, }; static const struct mtk_dpi_conf mt8183_conf = { .cal_factor = mt8183_calculate_factor, .reg_h_fre_con = 0xe0, + .max_clock_khz = 100000, }; static int mtk_dpi_probe(struct platform_device *pdev) |