Add support for the OSD1 HDR registers so meson DRM can handle the HDR properties set by Amlogic u-boot on G12A and newer devices which result in blue/green/pink colour distortion to display output. This takes the original patch submissions from Mathias [0] and [1] with corrections for formatting and the missing description and attribution needed for merge. [0] https://lore.kernel.org/linux-amlogic/59dfd7e6-fc91-3d61-04c4-94e078a3188c@xxxxxxxxxxxx/T/ [1] https://lore.kernel.org/linux-amlogic/CAOKfEHBx_fboUqkENEMd-OC-NSrf46nto+vDLgvgttzPe99kXg@xxxxxxxxxxxxxx/T/#u Fixes: 728883948b0d ("drm/meson: Add G12A Support for VIU setup") Suggested-by: Mathias Steiger <mathias.steiger@xxxxxxxxxxxxxx> Signed-off-by: Christian Hewitt <christianshewitt@xxxxxxxxx> Tested-by: Neil Armstrong<narmstrong@xxxxxxxxxxxx> Tested-by: Philip Milev <milev.philip@xxxxxxxxx> --- drivers/gpu/drm/meson/meson_registers.h | 5 +++++ drivers/gpu/drm/meson/meson_viu.c | 7 ++++++- 2 files changed, 11 insertions(+), 1 deletion(-) diff --git a/drivers/gpu/drm/meson/meson_registers.h b/drivers/gpu/drm/meson/meson_registers.h index 446e7961da48..0f3cafab8860 100644 --- a/drivers/gpu/drm/meson/meson_registers.h +++ b/drivers/gpu/drm/meson/meson_registers.h @@ -634,6 +634,11 @@ #define VPP_WRAP_OSD3_MATRIX_PRE_OFFSET2 0x3dbc #define VPP_WRAP_OSD3_MATRIX_EN_CTRL 0x3dbd +/* osd1 HDR */ +#define OSD1_HDR2_CTRL 0x38a0 +#define OSD1_HDR2_CTRL_VDIN0_HDR2_TOP_EN BIT(13) +#define OSD1_HDR2_CTRL_REG_ONLY_MAT BIT(16) + /* osd2 scaler */ #define OSD2_VSC_PHASE_STEP 0x3d00 #define OSD2_VSC_INI_PHASE 0x3d01 diff --git a/drivers/gpu/drm/meson/meson_viu.c b/drivers/gpu/drm/meson/meson_viu.c index aede0c67a57f..259f3e6bec90 100644 --- a/drivers/gpu/drm/meson/meson_viu.c +++ b/drivers/gpu/drm/meson/meson_viu.c @@ -425,9 +425,14 @@ void meson_viu_init(struct meson_drm *priv) if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXM) || meson_vpu_is_compatible(priv, VPU_COMPATIBLE_GXL)) meson_viu_load_matrix(priv); - else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) + else if (meson_vpu_is_compatible(priv, VPU_COMPATIBLE_G12A)) { meson_viu_set_g12a_osd1_matrix(priv, RGB709_to_YUV709l_coeff, true); + /* fix green/pink color distortion from vendor u-boot */ + writel_bits_relaxed(OSD1_HDR2_CTRL_REG_ONLY_MAT | + OSD1_HDR2_CTRL_VDIN0_HDR2_TOP_EN, 0, + priv->io_base + _REG(OSD1_HDR2_CTRL)); + } /* Initialize OSD1 fifo control register */ reg = VIU_OSD_DDR_PRIORITY_URGENT | -- 2.17.1
