Re: [PATCH] drm/meson: fix colour distortion from HDR set during vendor u-boot
From: Neil Armstrong
Date: Tue Aug 10 2021 - 03:56:40 EST
Hi Christian,
On 06/08/2021 11:40, Christian Hewitt wrote:
> 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 |
>
Thanks for taking time to re-submit this patch,
Applying to drm-misc-fixes
Neil