Hi Inki,
On 01/31/2013 02:30 AM, Inki Dae wrote:
-----Original Message-----
From: Sylwester Nawrocki [mailto:sylvester.nawrocki@xxxxxxxxx]
Sent: Thursday, January 31, 2013 5:51 AM
To: Inki Dae
Cc: Sachin Kamat; linux-media@xxxxxxxxxxxxxxx; dri-
devel@xxxxxxxxxxxxxxxxxxxxx; devicetree-discuss@xxxxxxxxxxxxxxxx;
patches@xxxxxxxxxx; s.nawrocki@xxxxxxxxxxx
Subject: Re: [PATCH 2/2] drm/exynos: Add device tree based discovery
support for G2D
On 01/30/2013 09:50 AM, Inki Dae wrote:
+static const struct of_device_id exynos_g2d_match[] = {
+ { .compatible = "samsung,g2d-v41" },
not only Exynos5 and also Exyno4 has the g2d gpu and drm-based g2d
driver shoud support for all Exynos SoCs. How about using
"samsung,exynos5-g2d" instead and adding a new property 'version' to
identify ip version more surely? With this, we could know which SoC
and its g2d ip version. The version property could have '0x14' or
others. And please add descriptions to dt document.
Err no. Are you suggesting using "samsung,exynos5-g2d" compatible string
for Exynos4 specific IPs ? This would not be correct, and you still can
I assumed the version 'v41' is the ip for Exynos5 SoC. So if this version
means Exynos4 SoC then it should be "samsung,exynos4-g2d".
Yes, v3.0 is implemented in the S5PC110 (Exynos3110) SoCs and Exynos4210,
V4.1 can be found in Exynos4212 and Exynos4412, if I'm not mistaken.
So we could have:
compatible = "samsung,exynos-g2d-3.0" /* for Exynos3110, Exynos4210 */
compatible = "samsung,exynos-g2d-4.1" /* for Exynos4212, Exynos4412 */
or alternatively
compatible = "samsung,exynos3110-g2d" /* for Exynos3110, Exynos4210 */
compatible = "samsung,exynos4212-g2d" /* for Exynos4212, Exynos4412 */
I don't see a need to use an additional redundant property to identify
the device. These IPs across Exynos SoC do differ and specifying
a general property like "samsung,exynos4-g2d" for them would simply be
a violation of existing conventions.
--
Thanks,
Sylwester
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